diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9cc5906..42b6770 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,26 +1,6 @@
 cmake_minimum_required(VERSION 3.16)
 
-project(metaball)
+project(metaballs)
 set(CMAKE_C_STANDARD 99)
-# set(CMAKE_C_STANDARD_REQUIRED TRUE)
 
-# raylib
-find_package(raylib QUIET)
-if (NOT raylib_FOUND)
-    include(FetchContent)
-    FetchContent_Declare(
-        raylib
-        GIT_REPOSITORY https://github.com/raysan5/raylib.git
-        GIT_TAG 4.5.0
-    )
-    FetchContent_MakeAvailable(raylib)
-endif()
-
-message(STATUS "PROJECT_NAME: ${PROJECT_NAME}")
-add_executable(${PROJECT_NAME} main.c metaballs.h)
-target_link_libraries(${PROJECT_NAME} PUBLIC raylib)
-
-add_custom_target(copy_assets
-    COMMAND ${CMAKE_COMMAND} -E copy_directory ${CMAKE_CURRENT_LIST_DIR}/assets ${CMAKE_CURRENT_BINARY_DIR}/assets
-)
-add_dependencies(${PROJECT_NAME} copy_assets)
\ No newline at end of file
+add_subdirectory(examples)
\ No newline at end of file
diff --git a/README.md b/README.md
index 3bd383e..83ef9bd 100644
--- a/README.md
+++ b/README.md
@@ -2,13 +2,13 @@
 
 ![Thumbnail](./thumbnail.jpg)
 
-Header only 3d metaballs generator in ANSI C
+Header only 3d metaballs generator in C99
 
 ## About
 
 [![Build Status](https://github.com/casensiom/metaballs/actions/workflows/cmake-multi-platform.yml/badge.svg)](https://github.com/casensiom/metaballs/actions)
 
-This library computes 3d metaballs in pure ANSI C.
+This library computes 3d metaballs in pure C99.
 
 ![Thumbnail](./thumbnail.gif)
 
diff --git a/assets/texel_checker.png b/assets/texel_checker.png
deleted file mode 100644
index 79d3832..0000000
Binary files a/assets/texel_checker.png and /dev/null differ
diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
new file mode 100644
index 0000000..4e5a6f2
--- /dev/null
+++ b/examples/CMakeLists.txt
@@ -0,0 +1,34 @@
+# raylib
+find_package(raylib QUIET)
+if (NOT raylib_FOUND)
+    include(FetchContent)
+    FetchContent_Declare(
+        raylib
+        GIT_REPOSITORY https://github.com/raysan5/raylib.git
+        GIT_TAG 4.5.0
+    )
+    FetchContent_MakeAvailable(raylib)
+endif()
+
+add_library(metaball_dependency 
+    raylib_wrapper.h 
+    raylib_wrapper.c 
+    ball.h 
+    ball.c
+)
+target_link_libraries(metaball_dependency PUBLIC raylib)
+
+add_custom_target(copy_assets
+    COMMAND ${CMAKE_COMMAND} -E copy_directory ${CMAKE_CURRENT_LIST_DIR}/assets ${CMAKE_CURRENT_BINARY_DIR}/assets
+)
+add_dependencies(metaball_dependency copy_assets)
+
+add_executable(example0 example0.c)
+target_link_libraries(example0 PUBLIC metaball_dependency)
+
+add_executable(example1 example1.c)
+target_link_libraries(example1 PUBLIC metaball_dependency)
+
+add_executable(example2 example2.c)
+target_link_libraries(example2 PUBLIC metaball_dependency)
+
diff --git a/examples/assets/uv.png b/examples/assets/uv.png
new file mode 100644
index 0000000..ce90316
Binary files /dev/null and b/examples/assets/uv.png differ
diff --git a/examples/ball.c b/examples/ball.c
new file mode 100644
index 0000000..f35017d
--- /dev/null
+++ b/examples/ball.c
@@ -0,0 +1,40 @@
+#include "ball.h"
+
+void ball_push(BallArray *balls, Ball ball)
+{
+    balls->items[balls->count] = ball;
+    balls->count++;
+}
+
+Ball ball_create_random(Grid grid)
+{
+    float radius_x = (grid.count.x * grid.size.x) / 4;
+    float radius_y = (grid.count.y * grid.size.y) / 4;
+    float radius_z = (grid.count.z * grid.size.z) / 4;
+
+    Vector3d speed = {
+        .x = 0.1f + (float)rand() / ((float)RAND_MAX / 2.0f),
+        .y = 0.1f + (float)rand() / ((float)RAND_MAX / 2.0f),
+        .z = 0.1f + (float)rand() / ((float)RAND_MAX / 2.0f)};
+
+    Vector3d initial = {
+        .x = 2.0f - (float)rand() / ((float)RAND_MAX / 4.0f),
+        .y = 2.0f - (float)rand() / ((float)RAND_MAX / 4.0f),
+        .z = 2.0f - (float)rand() / ((float)RAND_MAX / 4.0f)};
+
+    Vector3d p = (Vector3d){
+        .x = grid.center.x + radius_x * cos(initial.x),
+        .y = grid.center.y + radius_y * sin(initial.y),
+        .z = grid.center.z + radius_z * cos(initial.z)};
+
+    Color4C color = (Color4C){
+        .r = (unsigned char)(64  + (rand() % 192)),
+        .g = (unsigned char)(128 + (rand() % 128)),
+        .b = (unsigned char)(128 + (rand() % 128)),
+        .a = (unsigned char)(255)
+    };
+
+    float ball_mass = 50.0f + (float)(rand() % 200);
+
+    return (Ball){.pos = p, .mass = ball_mass, .color = color};
+}
diff --git a/examples/ball.h b/examples/ball.h
new file mode 100644
index 0000000..c0dd13e
--- /dev/null
+++ b/examples/ball.h
@@ -0,0 +1,9 @@
+#ifndef _BALL_H_
+#define _BALL_H_
+
+#include "../metaballs.h"
+
+void ball_push(BallArray *balls, Ball ball);
+Ball ball_create_random(Grid grid);
+
+#endif //_BALL_H_
\ No newline at end of file
diff --git a/examples/example0.c b/examples/example0.c
new file mode 100644
index 0000000..fd240f5
--- /dev/null
+++ b/examples/example0.c
@@ -0,0 +1,113 @@
+#include "ball.h"
+#include "raylib_wrapper.h"
+
+int main(int argc, char *argv[])
+{
+    const int screenWidth = 800;
+    const int screenHeight = 400;
+    InitWindow(screenWidth, screenHeight, "Metaballs");
+    //DisableCursor();
+
+    Index3d count = {.x = 10, .y = 10, .z = 10};
+    Vector3d size = {.x = 2, .y = 2, .z = 2};
+    Vector3d pos = {.x = 0, .y = 0, .z = 0};
+    Grid grid = grid_create(count, size, pos);
+
+    BallArray balls = MB_CREATE_ARRAY(Ball, 3);
+
+    Vector3d zero = {
+        .x = 0.0f,
+        .y = 0.0f,
+        .z = 0.0f};
+
+    Vector3d center = (Vector3d){
+        .x = grid.center.x,
+        .y = grid.center.y,
+        .z = grid.center.z};
+
+    Color4C color = (Color4C){
+        .r = 0xff,
+        .g = 0xff,
+        .b = 0xff,
+        .a = 0xff
+    };
+    ball_push(&balls, (Ball){.pos = center, .mass = 15, .color = color});
+
+    // Define the camera to look into our 3d world
+    Camera camera = {0};
+    camera.position = (Vector3){grid.center.x, grid.center.y, grid.center.z - grid.count.z * grid.size.z * 1.5}; // Camera position
+    camera.target = (Vector3){grid.center.x, grid.center.y, grid.center.z};                                    // Camera looking at point
+    camera.up = (Vector3){0.0f, 1.0f, 0.0f};                                                                   // Camera up vector (rotation towards target)
+    camera.fovy = 45.0f;                                                                                       // Camera field-of-view Y
+    camera.projection = CAMERA_PERSPECTIVE;                                                                    // Camera projection type
+
+
+    Material wired = LoadMaterialDefault();
+    wired.maps[MATERIAL_MAP_DIFFUSE].color = GRAY;
+    wired.maps[MATERIAL_MAP_SPECULAR].color = GRAY;
+
+    Texture2D text2d = LoadTexture("assets/uv.png");
+    SetTextureWrap(text2d, TEXTURE_WRAP_CLAMP);
+    Material material = LoadMaterialDefault();
+    material.maps[MATERIAL_MAP_DIFFUSE].texture = text2d;
+    material.maps[MATERIAL_MAP_SPECULAR].color = GRAY;
+
+    Matrix transform = (Matrix){1.0f, 0.0f, 0.0f, 0.0f,
+                                0.0f, 1.0f, 0.0f, 0.0f,
+                                0.0f, 0.0f, 1.0f, 0.0f,
+                                0.0f, 0.0f, 0.0f, 1.0f};
+
+    // RL upload mesh
+    Mesh rayMesh = raylib_upload_mesh(grid);
+
+    while (!WindowShouldClose()) // Detect window close button or ESC key
+    {
+
+        UpdateCamera(&camera, CAMERA_THIRD_PERSON);
+        camera.target = (Vector3){grid.center.x, grid.center.y, grid.center.z};
+
+        if(IsKeyPressed(KEY_U)) {
+            grid.config.wired = !grid.config.wired;
+        }
+        if(IsKeyPressed(KEY_P)) {
+            grid.config.mapping = MAPPING_PLANAR;
+        }
+        if(IsKeyPressed(KEY_L)) {
+            grid.config.mapping = MAPPING_SPHERIC;
+        }
+
+        if(IsKeyPressed(KEY_H)) {
+            grid.config.threshold += 0.05f;
+        }
+        if(IsKeyPressed(KEY_J)) {
+            grid.config.threshold -= 0.05f;
+        }
+
+        generate_mesh(&grid, balls);
+
+        BeginDrawing();
+            ClearBackground(RAYWHITE);
+            BeginMode3D(camera);
+                // RL render mesh
+                raylib_render_mesh(grid, &rayMesh, material, wired, transform);
+            EndMode3D();
+
+            char label_fps[256];
+            sprintf(label_fps, "FPS: %d", GetFPS());
+            DrawText(label_fps, 10, 10, 20, BLACK);
+
+            // sprintf(label_fps, "CACHE HIT: %lu, MISS: %lu", cache_hit, cache_miss);
+            // DrawText(label_fps, 10, 50, 20, BLACK);
+        EndDrawing();
+    }
+
+
+    // RL unload mesh
+    raylib_unload_mesh(&rayMesh);
+    MB_DESTROY_ARRAY(balls);
+    grid_destroy(&grid);
+
+    CloseWindow();
+
+    return 0;
+}
diff --git a/examples/example1.c b/examples/example1.c
new file mode 100644
index 0000000..befb0e2
--- /dev/null
+++ b/examples/example1.c
@@ -0,0 +1,128 @@
+#include "ball.h"
+#include "raylib_wrapper.h"
+
+
+void update_balls(BallArray balls, Vector3d pos, float radius) {
+
+    float t = GetTime();
+
+    Vector3d movement[] = {{.x = 1.1, .y = 1.3, .z = 1.7},
+                            {.x = 0.7, .y = 1.9, .z = 2.3},
+                            {.x = 0.3, .y = 2.9, .z = 1.1},
+                            {.x = 1.3, .y = 1.7, .z = 0.7},
+                            {.x = 2.3, .y = 1.9, .z = 2.9}};
+    const size_t count = sizeof(movement) / sizeof(movement[0]);
+
+    
+    float ec = radius;
+    for (size_t i = 0; i < balls.count; i++)
+    {
+        Vector3d m = movement[i % count];
+	    balls.items[i].pos = (Vector3d){.x = pos.x - cos(t*m.x) * radius, 
+                                        .y = pos.y - cos(t*m.y) * radius, 
+                                        .z = pos.z - cos(t*m.z) * radius};
+        
+    }
+}
+
+
+int main(int argc, char *argv[])
+{
+    const int screenWidth = 800;
+    const int screenHeight = 400;
+    InitWindow(screenWidth, screenHeight, "Metaballs");
+    DisableCursor();
+
+    Index3d count = {.x = 20 * 2, .y = 20 * 2, .z = 20 * 2};
+    Vector3d size = {.x = 10 / 2, .y = 10 / 2, .z = 10 / 2};
+    Vector3d pos = {.x = 0, .y = 0, .z = 0};
+    Grid grid = grid_create(count, size, pos);
+
+    BallArray balls = MB_CREATE_ARRAY(Ball, 5);
+    for (size_t i = 0; i < balls.capacity; i++)
+    {
+        ball_push(&balls, ball_create_random(grid));
+    }
+
+    // Define the camera to look into our 3d world
+    Camera camera = {0};
+    camera.position = (Vector3){grid.center.x, grid.center.y, grid.center.z - grid.count.z * grid.size.z * 1.5}; // Camera position
+    camera.target = (Vector3){grid.center.x, grid.center.y, grid.center.z};                                    // Camera looking at point
+    camera.up = (Vector3){0.0f, 1.0f, 0.0f};                                                                   // Camera up vector (rotation towards target)
+    camera.fovy = 45.0f;                                                                                       // Camera field-of-view Y
+    camera.projection = CAMERA_PERSPECTIVE;                                                                    // Camera projection type
+
+
+    Material wired = LoadMaterialDefault();
+    wired.maps[MATERIAL_MAP_DIFFUSE].color = GRAY;
+    wired.maps[MATERIAL_MAP_SPECULAR].color = GRAY;
+
+    Texture2D text2d = LoadTexture("assets/uv.png");
+    SetTextureWrap(text2d, TEXTURE_WRAP_MIRROR_REPEAT);
+    Material material = LoadMaterialDefault();
+    material.maps[MATERIAL_MAP_DIFFUSE].texture = text2d;
+    material.maps[MATERIAL_MAP_SPECULAR].color = GRAY;
+
+    Matrix transform = (Matrix){1.0f, 0.0f, 0.0f, 0.0f,
+                                0.0f, 1.0f, 0.0f, 0.0f,
+                                0.0f, 0.0f, 1.0f, 0.0f,
+                                0.0f, 0.0f, 0.0f, 1.0f};
+
+    // RL upload mesh
+    Mesh rayMesh = raylib_upload_mesh(grid);
+
+    while (!WindowShouldClose()) // Detect window close button or ESC key
+    {
+
+        UpdateCamera(&camera, CAMERA_THIRD_PERSON);
+        camera.target = (Vector3){grid.center.x, grid.center.y, grid.center.z};
+
+        if (!IsKeyDown(KEY_SPACE))
+        {
+            update_balls(balls, grid.center, grid.size.x * 10);
+        }
+        if(IsKeyPressed(KEY_U)) {
+            grid.config.wired = !grid.config.wired;
+        }
+        if(IsKeyPressed(KEY_P)) {
+            grid.config.mapping = MAPPING_PLANAR;
+        }
+        if(IsKeyPressed(KEY_L)) {
+            grid.config.mapping = MAPPING_SPHERIC;
+        }
+
+        if(IsKeyPressed(KEY_H)) {
+            grid.config.threshold += 0.05f;
+        }
+        if(IsKeyPressed(KEY_J)) {
+            grid.config.threshold -= 0.05f;
+        }
+
+        generate_mesh(&grid, balls);
+
+        BeginDrawing();
+            ClearBackground(RAYWHITE);
+            BeginMode3D(camera);
+                // RL render mesh
+                raylib_render_mesh(grid, &rayMesh, material, wired, transform);
+            EndMode3D();
+
+            char label_fps[256];
+            sprintf(label_fps, "FPS: %d", GetFPS());
+            DrawText(label_fps, 10, 10, 20, BLACK);
+
+            // sprintf(label_fps, "CACHE HIT: %lu, MISS: %lu", cache_hit, cache_miss);
+            // DrawText(label_fps, 10, 50, 20, BLACK);
+        EndDrawing();
+    }
+
+
+    // RL unload mesh
+    raylib_unload_mesh(&rayMesh);
+    MB_DESTROY_ARRAY(balls);
+    grid_destroy(&grid);
+
+    CloseWindow();
+
+    return 0;
+}
diff --git a/examples/example2.c b/examples/example2.c
new file mode 100644
index 0000000..dd34773
--- /dev/null
+++ b/examples/example2.c
@@ -0,0 +1,133 @@
+#include "ball.h"
+#include "raylib_wrapper.h"
+
+
+void update_balls(BallArray balls, size_t w, size_t d, Grid grid) 
+{
+    size_t index = 0;
+    for (size_t x = 0; x < w; x++)
+    {
+        float u = (float)x / (float)w;
+        for (size_t z = 0; z < d; z++)
+        {
+            float wave = 10.0 + 12.0 * sin(32 * u + GetTime()  * 4.0f);
+            balls.items[index++].pos.y = wave;
+        }
+    }
+
+    float z = grid.pos.z + grid.size.z * (grid.count.z/2);
+    float wave = 12.0 * sin(GetTime() * 2.0f);
+    balls.items[balls.count-1].pos.z = z + wave;
+    balls.items[balls.count-2].pos.z = z - wave;
+
+}
+
+int main(int argc, char *argv[])
+{
+    const int screenWidth = 800;
+    const int screenHeight = 400;
+    InitWindow(screenWidth, screenHeight, "Metaballs");
+    // DisableCursor();
+
+    Index3d count = {.x = 40, .y = 10, .z = 20};
+    Vector3d size = {.x = 10, .y = 10, .z = 10};
+    Vector3d pos = {.x = 0, .y = 0, .z = 0};
+    Grid grid = grid_create(count, size, pos);
+    grid.config.wired = true;
+    grid.config.threshold = 0.2;
+
+    size_t w = 16;
+    size_t d = 4;
+    BallArray balls = MB_CREATE_ARRAY(Ball, w*d + 2);
+
+    for (size_t x = 0; x < w; x++)
+    {
+        for (size_t z = 0; z < d; z++)
+        {
+            ball_push(&balls, (Ball){
+                .pos = {.x = pos.x + size.x * (x * count.x/(w - 1)), 
+                        .y = pos.y + 2 * size.y, 
+                        .z = pos.z + size.z * (z * count.z/(d - 1))}, 
+                .mass = 48, 
+                .color = {.r = 0x80 , .g = 0x80, .b = (128) + ((64+64)*x)/w , .a = 0xff}});
+        }
+    }
+
+    Vector3d ball_pos = {.x = pos.x + 10 * size.x, .y = pos.y + 4 * size.y, .z = pos.z + 10 * size.z};
+    ball_push(&balls, (Ball){.pos = ball_pos, .mass = -96, .color = {.r = 0xff, .g = 0xff, .b = 0xff, .a = 0xff}});
+
+    ball_pos = (Vector3d){.x = pos.x + 30 * size.x, .y = pos.y + 4 * size.y, .z = pos.z + 10 * size.z};
+    ball_push(&balls, (Ball){.pos = ball_pos, .mass = -96, .color = {.r = 0xff, .g = 0xff, .b = 0xff, .a = 0xff}});
+
+
+    // Define the camera to look into our 3d world
+    Camera camera = {0};
+    camera.position = (Vector3){grid.center.x, grid.center.y, grid.center.z - grid.count.z * grid.size.z}; // Camera position
+    camera.target = (Vector3){grid.center.x, grid.center.y, grid.center.z};                                    // Camera looking at point
+    camera.up = (Vector3){0.0f, 1.0f, 0.0f};                                                                   // Camera up vector (rotation towards target)
+    camera.fovy = 45.0f;                                                                                       // Camera field-of-view Y
+    camera.projection = CAMERA_PERSPECTIVE;                                                                    // Camera projection type
+
+
+    Material wired = LoadMaterialDefault();
+    wired.maps[MATERIAL_MAP_DIFFUSE].color = GRAY;
+    wired.maps[MATERIAL_MAP_SPECULAR].color = GRAY;
+
+    Material material = LoadMaterialDefault();
+    material.maps[MATERIAL_MAP_DIFFUSE].color = WHITE;
+    material.maps[MATERIAL_MAP_SPECULAR].color = GRAY;
+
+    Matrix transform = (Matrix){1.0f, 0.0f, 0.0f, 0.0f,
+                                0.0f, 1.0f, 0.0f, 0.0f,
+                                0.0f, 0.0f, 1.0f, 0.0f,
+                                0.0f, 0.0f, 0.0f, 1.0f};
+
+    // RL upload mesh
+    Mesh rayMesh = raylib_upload_mesh(grid);
+
+    while (!WindowShouldClose()) // Detect window close button or ESC key
+    {
+        UpdateCamera(&camera, CAMERA_THIRD_PERSON);
+        camera.target = (Vector3){grid.center.x, grid.center.y, grid.center.z};
+
+        if (!IsKeyDown(KEY_SPACE))
+        {
+            update_balls(balls, w, d, grid);
+        }
+        if(IsKeyPressed(KEY_U)) {
+            grid.config.wired = !grid.config.wired;
+        }
+        if(IsKeyPressed(KEY_P)) {
+            grid.config.mapping = MAPPING_PLANAR;
+        }
+        if(IsKeyPressed(KEY_L)) {
+            grid.config.mapping = MAPPING_SPHERIC;
+        }
+
+        if(IsKeyPressed(KEY_H)) {
+            grid.config.threshold += 0.05f;
+        }
+        if(IsKeyPressed(KEY_J)) {
+            grid.config.threshold -= 0.05f;
+        }
+        generate_mesh(&grid, balls);
+
+        BeginDrawing();
+            ClearBackground(RAYWHITE);
+            BeginMode3D(camera);
+                // RL render mesh
+                raylib_render_mesh(grid, &rayMesh, material, wired, transform);
+            EndMode3D();
+        EndDrawing();
+    }
+
+
+    // RL unload mesh
+    raylib_unload_mesh(&rayMesh);
+    MB_DESTROY_ARRAY(balls);
+    grid_destroy(&grid);
+
+    CloseWindow();
+
+    return 0;
+}
diff --git a/examples/raylib_wrapper.c b/examples/raylib_wrapper.c
new file mode 100644
index 0000000..532c095
--- /dev/null
+++ b/examples/raylib_wrapper.c
@@ -0,0 +1,118 @@
+#include "raylib_wrapper.h"
+
+#define METABALLS_IMPLEMENTATION
+#include "../metaballs.h"
+
+Mesh raylib_upload_mesh(Grid grid)
+{
+    Mesh mesh = {0};
+
+    mesh.vertexCount = grid.mesh.vertexCapacity;
+    mesh.triangleCount = grid.mesh.triangleCapacity;
+    mesh.vertices = grid.mesh.vertices;
+    mesh.texcoords = grid.mesh.texcoords;
+    mesh.colors = grid.mesh.colors;
+    mesh.normals = grid.mesh.normals;
+    mesh.indices = grid.mesh.indices;
+
+    UploadMesh(&mesh, true);
+
+    return mesh;
+}
+
+void raylib_render_mesh(Grid grid, Mesh *mesh, Material material, Material wired, Matrix transform)
+{
+    mesh->vertexCount = grid.mesh.vertexCount;
+    mesh->triangleCount = grid.mesh.triangleCount;
+
+    UpdateMeshBuffer(*mesh, 0, mesh->vertices, mesh->vertexCount * 3 * sizeof(float), 0);
+    UpdateMeshBuffer(*mesh, 1, mesh->texcoords, mesh->vertexCount * 2 * sizeof(float), 0);
+    UpdateMeshBuffer(*mesh, 2, mesh->normals, mesh->vertexCount * 3 * sizeof(float), 0);
+    UpdateMeshBuffer(*mesh, 3, mesh->colors, mesh->vertexCount * 4 * sizeof(unsigned char), 0);
+    UpdateMeshBuffer(*mesh, 6, mesh->indices, mesh->triangleCount * 3 * sizeof(unsigned short), 0);
+
+    DrawMesh(*mesh, material, transform);
+
+    if(grid.config.wired) {
+        rlEnableWireMode();
+        DrawMesh(*mesh, wired, transform);
+        rlDisableWireMode();
+    }
+
+    Vector3 center = (Vector3){
+        .x = grid.center.x - grid.size.x * 0.5f,
+        .y = grid.center.y - grid.size.y * 0.5f,
+        .z = grid.center.z - grid.size.z * 0.5f};
+    Vector3 size = (Vector3){
+        .x = (grid.count.x-1) * grid.size.x,
+        .y = (grid.count.y-1) * grid.size.y,
+        .z = (grid.count.z-1) * grid.size.z};
+    DrawCubeWiresV(center, size, BLACK);
+
+    Vector3 orig = (Vector3){
+        .x = grid.pos.x,
+        .y = grid.pos.y,
+        .z = grid.pos.z};
+    DrawSphere(orig, 2, BLACK);
+    DrawSphere(center, 2, BLACK);
+
+    // for (size_t i = 0; i < (grid.mesh.vertexCount) * 3; i++)
+    // {
+    //     Vector3 orig = {.x = 0,
+    //                     .y = 0,
+    //                     .z = 0};
+    //     Vector3 orig2 = {.x = grid.mesh.vertices[i + 0],
+    //                     .y = grid.mesh.vertices[i + 1],
+    //                     .z = grid.mesh.vertices[i + 2]};
+
+    //     Vector3 normal = {  .x = grid.mesh.normals[i + 0],
+    //                         .y = grid.mesh.normals[i + 1],
+    //                         .z = grid.mesh.normals[i + 2]};
+    //     Vector3 end = { .x = orig.x + normal.x * grid.size.x,
+    //                     .y = orig.y + normal.y * grid.size.y,
+    //                     .z = orig.z + normal.z * grid.size.z};
+
+    //     DrawLine3D(orig, end, BLUE);
+    // }
+
+    // for (size_t x = 0; x < grid.count.x; x++)
+    // {
+    //     for (size_t z = 0; z < grid.count.z; z++)
+    //     {
+    //         Vector3 orig = (Vector3){
+    //             .x = grid.pos.x + x * grid.size.x,
+    //             .y = grid.pos.y,
+    //             .z = grid.pos.z + z * grid.size.z};
+    //         Vector3 end = (Vector3){
+    //             .x = grid.pos.x + x * grid.size.x,
+    //             .y = grid.pos.y + (grid.count.y - 1) * grid.size.y,
+    //             .z = grid.pos.z + z * grid.size.z};
+
+    //         DrawLine3D(orig, end, PINK);
+    //     }
+    // }
+}
+
+void raylib_unload_mesh(Mesh *mesh)
+{
+    // Unload rlgl mesh vboId data
+    rlUnloadVertexArray(mesh->vaoId);
+    if (mesh->vboId != NULL) 
+    {
+        for (int i = 0; i < 7; i++) 
+        {
+            rlUnloadVertexBuffer(mesh->vboId[i]);
+        }
+    }
+    free(mesh->vboId);
+
+
+    mesh->vertices = 0x0;
+    mesh->texcoords = 0x0;
+    mesh->colors = 0x0;
+    mesh->normals = 0x0;
+    mesh->indices = 0x0;
+
+    mesh->vertexCount = 0;
+    mesh->triangleCount = 0;
+}
diff --git a/examples/raylib_wrapper.h b/examples/raylib_wrapper.h
new file mode 100644
index 0000000..c661e3a
--- /dev/null
+++ b/examples/raylib_wrapper.h
@@ -0,0 +1,10 @@
+
+#include "../metaballs.h"
+
+#include <raylib.h>
+#include <rlgl.h>
+
+
+Mesh raylib_upload_mesh(Grid grid);
+void raylib_render_mesh(Grid grid, Mesh *mesh, Material material, Material wired, Matrix transform);
+void raylib_unload_mesh(Mesh *mesh);
diff --git a/main.c b/main.c
deleted file mode 100644
index 977ab46..0000000
--- a/main.c
+++ /dev/null
@@ -1,204 +0,0 @@
-
-#define METABALLS_IMPLEMENTATION
-#include "metaballs.h"
-
-
-#include <raylib.h>
-#include <rlgl.h>
-
-
-Mesh raylib_upload_mesh(Grid grid)
-{
-    Mesh mesh = {0};
-
-    mesh.vertexCount = grid.mesh.vertexCapacity;
-    mesh.triangleCount = grid.mesh.triangleCapacity;
-    mesh.vertices = grid.mesh.vertices;
-    mesh.texcoords = grid.mesh.texcoords;
-    mesh.colors = grid.mesh.colors;
-    mesh.normals = grid.mesh.normals;
-    mesh.indices = grid.mesh.indices;
-
-    UploadMesh(&mesh, true);
-
-    return mesh;
-}
-
-void raylib_render_mesh(Grid grid, Mesh *mesh, Material material, Material wired, Matrix transform)
-{
-    mesh->vertexCount = grid.mesh.vertexCount;
-    mesh->triangleCount = grid.mesh.triangleCount;
-
-    UpdateMeshBuffer(*mesh, 0, mesh->vertices, mesh->vertexCount * 3 * sizeof(float), 0);
-    UpdateMeshBuffer(*mesh, 1, mesh->texcoords, mesh->vertexCount * 2 * sizeof(float), 0);
-    UpdateMeshBuffer(*mesh, 2, mesh->normals, mesh->vertexCount * 3 * sizeof(float), 0);
-    UpdateMeshBuffer(*mesh, 3, mesh->colors, mesh->vertexCount * 4 * sizeof(unsigned char), 0);
-    UpdateMeshBuffer(*mesh, 6, mesh->indices, mesh->triangleCount * 3 * sizeof(unsigned short), 0);
-
-    DrawMesh(*mesh, material, transform);
-
-    if(grid.config.wired) {
-        rlEnableWireMode();
-        DrawMesh(*mesh, wired, transform);
-        rlDisableWireMode();
-    }
-
-    Vector3 center = (Vector3){
-        .x = grid.center.x - grid.size.x * 0.5f,
-        .y = grid.center.y - grid.size.y * 0.5f,
-        .z = grid.center.z - grid.size.z * 0.5f};
-    Vector3 size = (Vector3){
-        .x = (grid.count.x-1) * grid.size.x,
-        .y = (grid.count.y-1) * grid.size.y,
-        .z = (grid.count.z-1) * grid.size.z};
-    DrawCubeWiresV(center, size, BLACK);
-
-    Vector3 orig = (Vector3){
-        .x = grid.pos.x,
-        .y = grid.pos.y,
-        .z = grid.pos.z};
-    DrawSphere(orig, 2, BLACK);
-    
-    
-    // for (size_t x = 0; x < grid.count.x; x++)
-    // {
-    //     for (size_t z = 0; z < grid.count.z; z++)
-    //     {
-    //         Vector3 orig = (Vector3){
-    //             .x = grid.pos.x + x * grid.size.x,
-    //             .y = grid.pos.y,
-    //             .z = grid.pos.z + z * grid.size.z};
-    //         Vector3 end = (Vector3){
-    //             .x = grid.pos.x + x * grid.size.x,
-    //             .y = grid.pos.y + (grid.count.y - 1) * grid.size.y,
-    //             .z = grid.pos.z + z * grid.size.z};
-
-    //         DrawLine3D(orig, end, BLUE);
-    //     }
-    // }
-}
-
-void raylib_unload_mesh(Mesh *mesh)
-{
-    // Unload rlgl mesh vboId data
-    rlUnloadVertexArray(mesh->vaoId);
-    if (mesh->vboId != NULL) 
-    {
-        for (int i = 0; i < 7; i++) 
-        {
-            rlUnloadVertexBuffer(mesh->vboId[i]);
-        }
-    }
-    free(mesh->vboId);
-
-
-    mesh->vertices = 0x0;
-    mesh->texcoords = 0x0;
-    mesh->colors = 0x0;
-    mesh->normals = 0x0;
-    mesh->indices = 0x0;
-
-    mesh->vertexCount = 0;
-    mesh->triangleCount = 0;
-}
-
-int main(int argc, char *argv[])
-{
-    const int screenWidth = 640;
-    const int screenHeight = 480;
-    InitWindow(screenWidth, screenHeight, "Metaballs");
-    DisableCursor();
-
-    Index3d count = {.x = 20, .y = 20, .z = 20};
-    Vector3d size = {.x = 10, .y = 10, .z = 10};
-    Vector3d pos = {.x = 0, .y = 0, .z = 0};
-    Grid grid = grid_create(count, size, pos);
-
-    BallArray balls = MB_CREATE_ARRAY(Ball, 5);
-    for (size_t i = 0; i < balls.capacity; i++)
-    {
-        push_ball(&balls, random_ball(grid));
-    }
-
-    // Define the camera to look into our 3d world
-    Camera camera = {0};
-    camera.position = (Vector3){grid.center.x, grid.center.y, grid.center.z - grid.count.z * grid.size.z * 2}; // Camera position
-    camera.target = (Vector3){grid.center.x, grid.center.y, grid.center.z};                                    // Camera looking at point
-    camera.up = (Vector3){0.0f, 1.0f, 0.0f};                                                                   // Camera up vector (rotation towards target)
-    camera.fovy = 45.0f;                                                                                       // Camera field-of-view Y
-    camera.projection = CAMERA_PERSPECTIVE;                                                                    // Camera projection type
-
-
-    Material wired = LoadMaterialDefault();
-    wired.maps[MATERIAL_MAP_DIFFUSE].color = GRAY;
-
-    Texture2D text2d = LoadTexture("assets/texel_checker.png");
-    SetTextureWrap(text2d, TEXTURE_WRAP_MIRROR_REPEAT);
-    Material material = LoadMaterialDefault();
-    material.maps[MATERIAL_MAP_DIFFUSE].texture = text2d;
-
-    Matrix transform = (Matrix){1.0f, 0.0f, 0.0f, 0.0f,
-                                0.0f, 1.0f, 0.0f, 0.0f,
-                                0.0f, 0.0f, 1.0f, 0.0f,
-                                0.0f, 0.0f, 0.0f, 1.0f};
-
-    // RL upload mesh
-    Mesh rayMesh = raylib_upload_mesh(grid);
-
-    while (!WindowShouldClose()) // Detect window close button or ESC key
-    {
-        cache_hit = 0;
-        cache_miss = 0;
-
-        UpdateCamera(&camera, CAMERA_THIRD_PERSON);
-        camera.target = (Vector3){grid.center.x, grid.center.y, grid.center.z};
-
-        if (!IsKeyDown(KEY_SPACE))
-        {
-            move_balls(grid, balls, GetTime());
-        }
-        if(IsKeyPressed(KEY_U)) {
-            grid.config.wired = !grid.config.wired;
-        }
-        if(IsKeyPressed(KEY_P)) {
-            grid.config.mapping = MAPPING_PLANAR;
-        }
-        if(IsKeyPressed(KEY_L)) {
-            grid.config.mapping = MAPPING_SPHERIC;
-        }
-
-        if(IsKeyPressed(KEY_H)) {
-            grid.config.threshold += 0.05f;
-        }
-        if(IsKeyPressed(KEY_J)) {
-            grid.config.threshold -= 0.05f;
-        }
-
-        generate_mesh(&grid, balls);
-
-        BeginDrawing();
-            ClearBackground(RAYWHITE);
-            BeginMode3D(camera);
-                // RL render mesh
-                raylib_render_mesh(grid, &rayMesh, material, wired, transform);
-            EndMode3D();
-
-            char label_fps[256];
-            sprintf(label_fps, "FPS: %d, THRESHOLD: %0.2f", GetFPS(), grid.config.threshold);
-            DrawText(label_fps, 10, 10, 20, BLACK);
-
-            sprintf(label_fps, "CACHE HIT: %lu, MISS: %lu", cache_hit, cache_miss);
-            DrawText(label_fps, 10, 50, 20, BLACK);
-        EndDrawing();
-    }
-
-
-    // RL unload mesh
-    raylib_unload_mesh(&rayMesh);
-    MB_DESTROY_ARRAY(balls);
-    grid_destroy(&grid);
-
-    CloseWindow();
-
-    return 0;
-}
diff --git a/metaballs.h b/metaballs.h
index a505e35..3c1ca48 100644
--- a/metaballs.h
+++ b/metaballs.h
@@ -2,7 +2,6 @@
 // https://github.com/casensiom/metaballs
 //
 
-
 #ifndef _METABALLS_H_
 #define _METABALLS_H_
 
@@ -37,12 +36,12 @@
         size_t count;                         \
     } TYPE##Array##SIZE;
 
-#define MB_CREATE_ARRAY(TYPE, CAPACITY)                   \
-    (TYPE##Array)                                         \
-    {                                                     \
-        .items = (TYPE *)malloc(CAPACITY * sizeof(TYPE)), \
-        .count = 0,                                       \
-        .capacity = CAPACITY                              \
+#define MB_CREATE_ARRAY(TYPE, CAPACITY)                     \
+    (TYPE##Array)                                           \
+    {                                                       \
+        .items = (TYPE *)malloc((CAPACITY) * sizeof(TYPE)), \
+        .count = 0,                                         \
+        .capacity = (CAPACITY)                              \
     }
 
 #define MB_DESTROY_ARRAY(arr) \
@@ -103,10 +102,6 @@ typedef struct ball_struct
     Vector3d pos;
     float mass;
     Color4C color;
-
-    // orbital params
-    Vector3d angular_speed;
-    Vector3d initial_pos;
 } Ball;
 MB_DEFINE_ARRAY(Ball);
 
@@ -187,20 +182,21 @@ typedef struct grid_struct
 } Grid;
 
 #if defined(__cplusplus)
-extern "C" {
+extern "C"
+{
 #endif
 
-Grid grid_create(Index3d count, Vector3d size, Vector3d pos);
+    Grid grid_create(Index3d count, Vector3d size, Vector3d pos);
 
-void grid_destroy(Grid *grid);
+    void grid_destroy(Grid *grid);
 
-void push_ball(BallArray *balls, Ball ball);
+    void push_ball(BallArray *balls, Ball ball);
 
-void move_balls(Grid grid, BallArray balls, float t);
+    void move_balls(Grid grid, BallArray balls, float t);
 
-Ball random_ball(Grid grid);
+    Ball random_ball(Grid grid);
 
-void generate_mesh(Grid *grid, BallArray balls);
+    void generate_mesh(Grid *grid, BallArray balls);
 
 #if defined(__cplusplus)
 }
@@ -210,7 +206,6 @@ void generate_mesh(Grid *grid, BallArray balls);
 
 #ifdef METABALLS_IMPLEMENTATION
 
-
 static char marching_cube_triangles[256][16];
 static char marching_cube_edges[12][2];
 static int marching_cube_vertices[8][3];
@@ -219,7 +214,37 @@ static char marching_cube_neighbors[256];
 static size_t cache_hit = 0;
 static size_t cache_miss = 0;
 
-float vector3d_length(Vector3d start, Vector3d end) {
+float clamp(float v, float min, float max)
+{
+    return (v < min) ? min : (v > max) ? max : v;
+}
+
+Vector3d vector3d_add(Vector3d orig, Vector3d val)
+{
+    return (Vector3d){
+        .x = orig.x + val.x,
+        .y = orig.y + val.y,
+        .z = orig.z + val.z};
+}
+
+Vector3d vector3d_substract(Vector3d orig, Vector3d val)
+{
+    return (Vector3d){
+        .x = orig.x - val.x,
+        .y = orig.y - val.y,
+        .z = orig.z - val.z};
+}
+
+Vector3d vector3d_multiply(Vector3d v, float factor)
+{
+    return (Vector3d){
+        .x = v.x * factor,
+        .y = v.y * factor,
+        .z = v.z * factor};
+}
+
+float vector3d_length(Vector3d start, Vector3d end)
+{
     float x = end.x - start.x;
     float y = end.y - start.y;
     float z = end.z - start.z;
@@ -249,7 +274,6 @@ float vector3d_dot_product(Vector3d v1, Vector3d v2)
     return v1.x * v2.x + v1.y * v2.y + v1.z * v2.z;
 }
 
-
 Vector3d compute_grid_point_coordinates(Index3d pos, Grid grid)
 {
     Vector3d out;
@@ -260,15 +284,16 @@ Vector3d compute_grid_point_coordinates(Index3d pos, Grid grid)
 }
 
 size_t compute_grid_point_index(Index3d pos, Grid grid)
-{    
+{
     size_t ret = pos.x +
-           (pos.y * grid.count.x) +
-           (pos.z * grid.count.x * grid.count.y);
+                 (pos.y * grid.count.x) +
+                 (pos.z * grid.count.x * grid.count.y);
     assert(ret < grid.count.x * grid.count.y * grid.count.z);
     return ret;
 }
 
-Index3d compute_grid_index(Vector3d pos, Grid grid) {
+Index3d compute_grid_index(Vector3d pos, Grid grid)
+{
     Index3d out;
     out.x = (size_t)floor((pos.x - grid.pos.x) / grid.size.x);
     out.y = (size_t)floor((pos.y - grid.pos.y) / grid.size.y);
@@ -380,33 +405,73 @@ float compute_energy(Vector3d world_pos, BallArray balls)
     return energy;
 }
 
+Vector3d compute_normal_balls(Vector3d pos, BallArray balls)
+{
+    Vector3d nor = (Vector3d){.x = 0.0, .y = 0.0001, .z = 0.0};
+
+    for (size_t i = 0; i < balls.count; ++i)
+    {
+        Vector3d dir = vector3d_substract(pos, balls.items[i].pos);
+        Vector3d v = {0};
+#if 1   // simplification
+        float dist = dir.x * dir.x + dir.y * dir.y + dir.z * dir.z;
+        if (dist > 1e-6)
+        {
+            v.x = dir.x / dist;
+            v.y = dir.y / dist;
+            v.z = dir.z / dist;
+        }
+#endif
+#if 0   // derive energy over position => 2 * mass / distance^4
+        float dist = dir.x * dir.x + dir.y * dir.y + dir.z * dir.z;
+        v.x = 2 * balls.items[i].mass * dir.x / (dist * dist);
+        v.y = 2 * balls.items[i].mass * dir.y / (dist * dist);
+        v.z = 2 * balls.items[i].mass * dir.z / (dist * dist);
+#endif
+#if 0
+        float db = vector3d_length(balls.items[i].pos, pos);
+        float x = clamp(db/balls.items[i].mass, 0.0, 1.0);
+        float p = x*x*(30.0*x*x - 60.0*x + 30.0);
+        v = vector3d_normalize( dir );
+        v = vector3d_multiply(v, p / balls.items[i].mass);
+#endif
+        nor = vector3d_add(nor, v);
+    }
+
+    return vector3d_normalize(nor);
+}
+
 Vertex3d compute_vertex(Vector3d vertex, Grid grid, BallArray balls)
 {
     Vertex3d v;
     v.pos = vertex;
 
     // Compute vertex normal
-    // n += 2 * mass * vector / distance^4
-    Vector3d normal = {0};
+    v.normal = compute_normal_balls(v.pos, balls);
     float total_energy = 0;
     for (size_t i = 0; i < balls.count; i++)
     {
+        if (balls.items[i].mass < 0)
+        {
+            continue;
+        }
         Vector3d dir = {
             .x = v.pos.x - balls.items[i].pos.x,
             .y = v.pos.y - balls.items[i].pos.y,
             .z = v.pos.z - balls.items[i].pos.z};
 
         float dist = dir.x * dir.x + dir.y * dir.y + dir.z * dir.z;
-        total_energy += balls.items[i].mass / dist;
 
-        normal.x += 2 * balls.items[i].mass * dir.x / (dist * dist);
-        normal.y += 2 * balls.items[i].mass * dir.y / (dist * dist);
-        normal.z += 2 * balls.items[i].mass * dir.z / (dist * dist);
+        total_energy += balls.items[i].mass / dist;
     }
 
     Color4C color = {0};
     for (size_t i = 0; i < balls.count; i++)
     {
+        if (balls.items[i].mass < 0)
+        {
+            continue;
+        }
         Vector3d dir = {
             .x = v.pos.x - balls.items[i].pos.x,
             .y = v.pos.y - balls.items[i].pos.y,
@@ -422,19 +487,18 @@ Vertex3d compute_vertex(Vector3d vertex, Grid grid, BallArray balls)
     }
     color.a = 0xff;
 
-    normal = vector3d_normalize(normal);
-
     if (grid.config.mapping == MAPPING_PLANAR)
     {
-        v.text_coord.x = (normal.x / 2.0) + 0.5;
-        v.text_coord.y = -(normal.y / 2.0) + 0.5;
+        v.text_coord.x = (v.normal.x / 2.0) + 0.5;
+        v.text_coord.y = -(v.normal.y / 2.0) + 0.5;
     }
     else
     {
-        float theta = atan2(normal.z, normal.x);
-        float phi = acos(normal.y);
-        v.text_coord.x = (theta + PI) / (2.0 * PI) + 0.5;
-        v.text_coord.y = phi / PI + 0.5;
+
+        float theta = atan2(v.normal.x, v.normal.z);
+        float phi = acos(v.normal.y);
+        v.text_coord.x = (theta + PI) / (2.0 * PI);
+        v.text_coord.y = (phi / PI);
     }
 
     v.color = color;
@@ -673,9 +737,9 @@ Grid grid_create(Index3d count, Vector3d size, Vector3d pos)
     Grid grid;
 
     Vector3d center = {
-        .x = pos.x + (count.x * size.x) / 2.0f,
-        .y = pos.y + (count.y * size.y) / 2.0f,
-        .z = pos.z + (count.z * size.z) / 2.0f};
+        .x = pos.x + ((count.x - 1.0f) / 2.0f) * size.x,
+        .y = pos.y + ((count.y - 1.0f) / 2.0f) * size.y,
+        .z = pos.z + ((count.z - 1.0f) / 2.0f) * size.z};
 
     grid.count = count;
     grid.size = size;
@@ -684,7 +748,10 @@ Grid grid_create(Index3d count, Vector3d size, Vector3d pos)
     grid.nodes = MB_CREATE_ARRAY(Node, grid.count.x * grid.count.y * grid.count.z);
     grid.queue = MB_CREATE_ARRAY(Index3d, grid.count.x * grid.count.y * grid.count.z);
     grid.mesh = mesh_create(grid);
+
     grid.config.threshold = 0.3;
+    grid.config.wired = true;
+    grid.config.mapping = MAPPING_SPHERIC;
 
     return grid;
 }
@@ -701,65 +768,6 @@ void grid_destroy(Grid *grid)
     mesh_destroy(&(grid->mesh));
 }
 
-void push_ball(BallArray *balls, Ball ball)
-{
-    balls->items[balls->count] = ball;
-    balls->count++;
-}
-
-void move_balls(Grid grid, BallArray balls, float t)
-{
-    float radius_x = (grid.count.x * grid.size.x) / 4;
-    float radius_y = (grid.count.y * grid.size.y) / 4;
-    float radius_z = (grid.count.z * grid.size.z) / 4;
-
-    for (size_t i = 0; i < balls.count; i++)
-    {
-        balls.items[i].pos = (Vector3d){
-            .x = grid.center.x + radius_x * cosf(balls.items[i].angular_speed.x * t + balls.items[i].initial_pos.x),
-            .y = grid.center.y + radius_y * sinf(balls.items[i].angular_speed.y * t + balls.items[i].initial_pos.y),
-            .z = grid.center.z + radius_z * cosf(balls.items[i].angular_speed.z * t + balls.items[i].initial_pos.z)};
-    }
-}
-
-Ball random_ball(Grid grid)
-{
-    float radius_x = (grid.count.x * grid.size.x) / 4;
-    float radius_y = (grid.count.y * grid.size.y) / 4;
-    float radius_z = (grid.count.z * grid.size.z) / 4;
-
-    Vector3d speed = {
-        .x = 0.1f + (float)rand() / ((float)RAND_MAX / 2.0f),
-        .y = 0.1f + (float)rand() / ((float)RAND_MAX / 2.0f),
-        .z = 0.1f + (float)rand() / ((float)RAND_MAX / 2.0f)};
-
-    Vector3d initial = {
-        .x = 2.0f - (float)rand() / ((float)RAND_MAX / 4.0f),
-        .y = 2.0f - (float)rand() / ((float)RAND_MAX / 4.0f),
-        .z = 2.0f - (float)rand() / ((float)RAND_MAX / 4.0f)};
-
-    Vector3d p = (Vector3d){
-        .x = grid.center.x + radius_x * cos(initial.x),
-        .y = grid.center.y + radius_y * sin(initial.y),
-        .z = grid.center.z + radius_z * cos(initial.z)};
-
-    Color4C color = (Color4C){
-        .r = (unsigned char)(64  + (rand() % 192)),
-        .g = (unsigned char)(128 + (rand() % 128)),
-        .b = (unsigned char)(128 + (rand() % 128)),
-        .a = (unsigned char)(255)
-    };
-
-    float ball_mass = 50.0f + (float)(rand() % 200);
-
-    return (Ball){.pos = p, .mass = ball_mass, .color = color, .angular_speed = speed, .initial_pos = initial};
-}
-
-
-
-
-
-
 //=============================================================================
 //==============================================================================
 
@@ -774,7 +782,7 @@ Ball random_ball(Grid grid)
 //     | / 3      | / 2
 //     |/         |/
 //     +----------+
-//    0            1       
+//    0            1
 
 //        +----------+
 //      7/|    6    /|
@@ -787,7 +795,7 @@ Ball random_ball(Grid grid)
 //     | /     2  | /
 //     |/3        |/1
 //     +----------+
-//           0           
+//           0
 
 //==============================================================================
 //==============================================================================
@@ -800,307 +808,302 @@ Ball random_ball(Grid grid)
 // bit 3 : y - 1
 // bit 4 : z + 1
 // bit 5 : z - 1
-static char marching_cube_neighbors[256] = 
-{
-     0, 42, 41, 43, 25, 59, 57, 59, 26, 58, 59, 59, 27, 59, 59, 51, 
-    38, 46, 47, 47, 63, 63, 63, 63, 62, 62, 63, 63, 63, 63, 63, 55, 
-    37, 47, 45, 47, 61, 63, 61, 63, 63, 63, 63, 63, 63, 63, 63, 55, 
-    39, 47, 47, 15, 63, 63, 63, 31, 63, 63, 63, 31, 63, 63, 63, 23, 
-    21, 63, 61, 63, 29, 63, 61, 63, 31, 63, 63, 63, 31, 63, 63, 55, 
-    55, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 55, 
-    53, 63, 61, 63, 61, 63, 60, 62, 63, 63, 63, 63, 63, 63, 62, 54, 
-    55, 63, 63, 31, 63, 63, 62, 30, 63, 63, 63, 31, 63, 63, 62, 22, 
-    22, 62, 63, 63, 31, 63, 63, 63, 30, 62, 63, 63, 31, 63, 63, 55, 
-    54, 62, 63, 63, 63, 63, 63, 63, 62, 60, 63, 61, 63, 61, 63, 53, 
-    55, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 55, 
-    55, 63, 63, 31, 63, 63, 63, 31, 63, 61, 63, 29, 63, 61, 63, 21, 
-    23, 63, 63, 63, 31, 63, 63, 63, 31, 63, 63, 63, 15, 47, 47, 39, 
-    55, 63, 63, 63, 63, 63, 63, 63, 63, 61, 63, 61, 47, 45, 47, 37, 
-    55, 63, 63, 63, 63, 63, 62, 62, 63, 63, 63, 63, 47, 47, 46, 38, 
-    51, 59, 59, 27, 59, 59, 58, 26, 59, 57, 59, 25, 43, 41, 42, 0
-};
+static char marching_cube_neighbors[256] =
+    {
+        0, 42, 41, 43, 25, 59, 57, 59, 26, 58, 59, 59, 27, 59, 59, 51,
+        38, 46, 47, 47, 63, 63, 63, 63, 62, 62, 63, 63, 63, 63, 63, 55,
+        37, 47, 45, 47, 61, 63, 61, 63, 63, 63, 63, 63, 63, 63, 63, 55,
+        39, 47, 47, 15, 63, 63, 63, 31, 63, 63, 63, 31, 63, 63, 63, 23,
+        21, 63, 61, 63, 29, 63, 61, 63, 31, 63, 63, 63, 31, 63, 63, 55,
+        55, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 55,
+        53, 63, 61, 63, 61, 63, 60, 62, 63, 63, 63, 63, 63, 63, 62, 54,
+        55, 63, 63, 31, 63, 63, 62, 30, 63, 63, 63, 31, 63, 63, 62, 22,
+        22, 62, 63, 63, 31, 63, 63, 63, 30, 62, 63, 63, 31, 63, 63, 55,
+        54, 62, 63, 63, 63, 63, 63, 63, 62, 60, 63, 61, 63, 61, 63, 53,
+        55, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 55,
+        55, 63, 63, 31, 63, 63, 63, 31, 63, 61, 63, 29, 63, 61, 63, 21,
+        23, 63, 63, 63, 31, 63, 63, 63, 31, 63, 63, 63, 15, 47, 47, 39,
+        55, 63, 63, 63, 63, 63, 63, 63, 63, 61, 63, 61, 47, 45, 47, 37,
+        55, 63, 63, 63, 63, 63, 62, 62, 63, 63, 63, 63, 47, 47, 46, 38,
+        51, 59, 59, 27, 59, 59, 58, 26, 59, 57, 59, 25, 43, 41, 42, 0};
 
 // Cube vertices
-static int marching_cube_vertices[8][3] = 
-{
-    {0,0,0},
-    {1,0,0},
-    {1,0,1},
-    {0,0,1},
-    {0,1,0},
-    {1,1,0},
-    {1,1,1},
-    {0,1,1}
-};
+static int marching_cube_vertices[8][3] =
+    {
+        {0, 0, 0},
+        {1, 0, 0},
+        {1, 0, 1},
+        {0, 0, 1},
+        {0, 1, 0},
+        {1, 1, 0},
+        {1, 1, 1},
+        {0, 1, 1}};
 
 // This is the edges and the direction on them. They are designed so
 // that edges of neighboring cubes are in the same direction.
-static char marching_cube_edges[12][2] = 
-{
-    {0,1}, {1,2}, {3,2}, {0,3},
-    {4,5}, {5,6}, {7,6}, {4,7},
-    {0,4}, {1,5}, {3,7}, {2,6}
-};
+static char marching_cube_edges[12][2] =
+    {
+        {0, 1}, {1, 2}, {3, 2}, {0, 3}, {4, 5}, {5, 6}, {7, 6}, {4, 7}, {0, 4}, {1, 5}, {3, 7}, {2, 6}};
 
 // This list gives the edges that the triangles in each case intersect.
-static char marching_cube_triangles[256][16] = 
-{ 
-    {-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 0  
-    { 3,  0,  8, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 1  
-    { 9,  0,  1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 2  
-    { 3,  1,  8,  1,  9,  8, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 3  
-    {11,  1,  2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 4  
-    { 3,  0,  8, 11,  1,  2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 5  
-    {11,  9,  2,  9,  0,  2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 6  
-    { 3,  2,  8,  8,  2, 11,  8, 11,  9, -1, -1, -1, -1, -1, -1, -1}, // 7  
-    { 2,  3, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 8 
-    { 2,  0, 10,  0,  8, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 9 
-    { 0,  1,  9, 10,  2,  3, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 10  
-    { 2,  1, 10, 10,  1,  9, 10,  9,  8, -1, -1, -1, -1, -1, -1, -1}, // 11  
-    { 1,  3, 11,  3, 10, 11, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 12  
-    { 1,  0, 11, 11,  0,  8, 11,  8, 10, -1, -1, -1, -1, -1, -1, -1}, // 13  
-    { 0,  3,  9,  9,  3, 10,  9, 10, 11, -1, -1, -1, -1, -1, -1, -1}, // 14  
-    {11,  9,  8, 10, 11,  8, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 15  
-    { 8,  4,  7, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 16  
-    { 0,  4,  3,  4,  7,  3, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 17  
-    { 9,  0,  1,  7,  8,  4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 18  
-    { 9,  4,  1,  1,  4,  7,  1,  7,  3, -1, -1, -1, -1, -1, -1, -1}, // 19  
-    {11,  1,  2,  7,  8,  4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 20  
-    { 7,  3,  4,  4,  3,  0, 11,  1,  2, -1, -1, -1, -1, -1, -1, -1}, // 21  
-    {11,  9,  2,  2,  9,  0,  7,  8,  4, -1, -1, -1, -1, -1, -1, -1}, // 22  
-    { 9,  2, 11,  7,  2,  9,  3,  2,  7,  4,  7,  9, -1, -1, -1, -1}, // 23  
-    { 7,  8,  4,  2,  3, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 24  
-    { 7, 10,  4,  4, 10,  2,  4,  2,  0, -1, -1, -1, -1, -1, -1, -1}, // 25  
-    { 1,  9,  0,  7,  8,  4, 10,  2,  3, -1, -1, -1, -1, -1, -1, -1}, // 26  
-    {10,  4,  7, 10,  9,  4,  2,  9, 10,  1,  9,  2, -1, -1, -1, -1}, // 27  
-    { 1,  3, 11, 11,  3, 10,  4,  7,  8, -1, -1, -1, -1, -1, -1, -1}, // 28  
-    {11,  1, 10, 10,  1,  4,  4,  1,  0,  4,  7, 10, -1, -1, -1, -1}, // 29  
-    { 8,  4,  7, 10,  9,  0, 11,  9, 10,  3, 10,  0, -1, -1, -1, -1}, // 30  
-    {10,  4,  7,  9,  4, 10, 11,  9, 10, -1, -1, -1, -1, -1, -1, -1}, // 31  
-    { 4,  9,  5, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 32  
-    { 4,  9,  5,  3,  0,  8, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 33  
-    { 4,  0,  5,  0,  1,  5, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 34  
-    { 4,  8,  5,  5,  8,  3,  5,  3,  1, -1, -1, -1, -1, -1, -1, -1}, // 35  
-    {11,  1,  2,  4,  9,  5, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 36  
-    { 8,  3,  0, 11,  1,  2,  5,  4,  9, -1, -1, -1, -1, -1, -1, -1}, // 37  
-    {11,  5,  2,  2,  5,  4,  2,  4,  0, -1, -1, -1, -1, -1, -1, -1}, // 38  
-    { 5,  2, 11,  5,  3,  2,  4,  3,  5,  8,  3,  4, -1, -1, -1, -1}, // 39  
-    { 4,  9,  5, 10,  2,  3, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 40  
-    { 2,  0, 10, 10,  0,  8,  5,  4,  9, -1, -1, -1, -1, -1, -1, -1}, // 41  
-    { 4,  0,  5,  5,  0,  1, 10,  2,  3, -1, -1, -1, -1, -1, -1, -1}, // 42  
-    { 5,  2,  1,  8,  2,  5, 10,  2,  8,  5,  4,  8, -1, -1, -1, -1}, // 43  
-    {10, 11,  3,  3, 11,  1,  4,  9,  5, -1, -1, -1, -1, -1, -1, -1}, // 44  
-    { 5,  4,  9,  1,  0,  8,  1,  8, 11, 11,  8, 10, -1, -1, -1, -1}, // 45  
-    { 0,  5,  4, 10,  5,  0, 11,  5, 10,  3, 10,  0, -1, -1, -1, -1}, // 46  
-    { 8,  5,  4, 11,  5,  8, 10, 11,  8, -1, -1, -1, -1, -1, -1, -1}, // 47  
-    { 8,  9,  7,  9,  5,  7, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 48  
-    { 0,  9,  3,  3,  9,  5,  3,  5,  7, -1, -1, -1, -1, -1, -1, -1}, // 49  
-    { 8,  0,  7,  7,  0,  1,  7,  1,  5, -1, -1, -1, -1, -1, -1, -1}, // 50  
-    { 3,  1,  5,  7,  3,  5, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 51  
-    { 8,  9,  7,  7,  9,  5,  2, 11,  1, -1, -1, -1, -1, -1, -1, -1}, // 52  
-    { 2, 11,  1,  0,  9,  5,  0,  5,  3,  3,  5,  7, -1, -1, -1, -1}, // 53  
-    { 2,  8,  0,  5,  8,  2,  7,  8,  5,  2, 11,  5, -1, -1, -1, -1}, // 54  
-    { 5,  2, 11,  3,  2,  5,  7,  3,  5, -1, -1, -1, -1, -1, -1, -1}, // 55  
-    { 5,  7,  9,  9,  7,  8,  2,  3, 10, -1, -1, -1, -1, -1, -1, -1}, // 56  
-    { 7,  9,  5,  2,  9,  7,  0,  9,  2, 10,  2,  7, -1, -1, -1, -1}, // 57  
-    {10,  2,  3,  8,  0,  1,  8,  1,  7,  7,  1,  5, -1, -1, -1, -1}, // 58  
-    { 1, 10,  2,  7, 10,  1,  5,  7,  1, -1, -1, -1, -1, -1, -1, -1}, // 59  
-    { 8,  9,  5,  7,  8,  5,  3, 11,  1, 10, 11,  3, -1, -1, -1, -1}, // 60  
-    { 0,  5,  7,  9,  5,  0,  0,  7, 10, 11,  1,  0,  0, 10, 11, -1}, // 61  
-    { 0, 10, 11,  3, 10,  0,  0, 11,  5,  7,  8,  0,  0,  5,  7, -1}, // 62  
-    { 5, 10, 11,  5,  7, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 63  
-    { 5, 11,  6, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 64  
-    { 3,  0,  8,  6,  5, 11, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 65  
-    { 1,  9,  0,  6,  5, 11, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 66  
-    { 3,  1,  8,  8,  1,  9,  6,  5, 11, -1, -1, -1, -1, -1, -1, -1}, // 67  
-    { 5,  1,  6,  1,  2,  6, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 68  
-    { 5,  1,  6,  6,  1,  2,  8,  3,  0, -1, -1, -1, -1, -1, -1, -1}, // 69  
-    { 5,  9,  6,  6,  9,  0,  6,  0,  2, -1, -1, -1, -1, -1, -1, -1}, // 70  
-    { 8,  5,  9,  2,  5,  8,  6,  5,  2,  8,  3,  2, -1, -1, -1, -1}, // 71  
-    {10,  2,  3,  5, 11,  6, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 72  
-    { 8, 10,  0,  0, 10,  2,  5, 11,  6, -1, -1, -1, -1, -1, -1, -1}, // 73  
-    { 9,  0,  1, 10,  2,  3,  6,  5, 11, -1, -1, -1, -1, -1, -1, -1}, // 74  
-    { 6,  5, 11,  2,  1,  9,  2,  9, 10, 10,  9,  8, -1, -1, -1, -1}, // 75  
-    {10,  6,  3,  3,  6,  5,  3,  5,  1, -1, -1, -1, -1, -1, -1, -1}, // 76  
-    {10,  0,  8,  5,  0, 10,  1,  0,  5,  6,  5, 10, -1, -1, -1, -1}, // 77  
-    { 6,  3, 10,  6,  0,  3,  5,  0,  6,  9,  0,  5, -1, -1, -1, -1}, // 78  
-    { 9,  6,  5, 10,  6,  9,  8, 10,  9, -1, -1, -1, -1, -1, -1, -1}, // 79  
-    { 6,  5, 11,  8,  4,  7, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 80  
-    { 0,  4,  3,  3,  4,  7, 11,  6,  5, -1, -1, -1, -1, -1, -1, -1}, // 81  
-    { 0,  1,  9,  6,  5, 11,  7,  8,  4, -1, -1, -1, -1, -1, -1, -1}, // 82  
-    { 5, 11,  6,  7,  1,  9,  3,  1,  7,  4,  7,  9, -1, -1, -1, -1}, // 83  
-    { 2,  6,  1,  1,  6,  5,  8,  4,  7, -1, -1, -1, -1, -1, -1, -1}, // 84  
-    { 5,  1,  2,  6,  5,  2,  4,  3,  0,  7,  3,  4, -1, -1, -1, -1}, // 85  
-    { 7,  8,  4,  5,  9,  0,  5,  0,  6,  6,  0,  2, -1, -1, -1, -1}, // 86  
-    { 9,  7,  3,  4,  7,  9,  9,  3,  2,  6,  5,  9,  9,  2,  6, -1}, // 87  
-    { 2,  3, 10,  4,  7,  8,  5, 11,  6, -1, -1, -1, -1, -1, -1, -1}, // 88 
-    { 6,  5, 11,  2,  4,  7,  0,  4,  2, 10,  2,  7, -1, -1, -1, -1}, // 89  
-    { 9,  0,  1,  8,  4,  7, 10,  2,  3,  6,  5, 11, -1, -1, -1, -1}, // 90  
-    { 1,  9,  2,  2,  9, 10, 10,  9,  4,  4,  7, 10,  6,  5, 11, -1}, // 91  
-    { 7,  8,  4,  5,  3, 10,  1,  3,  5,  6,  5, 10, -1, -1, -1, -1}, // 92  
-    {10,  5,  1,  6,  5, 10, 10,  1,  0,  4,  7, 10, 10,  0,  4, -1}, // 93 
-    { 9,  0,  5,  5,  0,  6,  6,  0,  3,  3, 10,  6,  7,  8,  4, -1}, // 94  
-    { 9,  6,  5, 10,  6,  9,  9,  4,  7,  9,  7, 10, -1, -1, -1, -1}, // 95  
-    { 9, 11,  4, 11,  6,  4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 96  
-    { 6,  4, 11, 11,  4,  9,  3,  0,  8, -1, -1, -1, -1, -1, -1, -1}, // 97  
-    { 1, 11,  0,  0, 11,  6,  0,  6,  4, -1, -1, -1, -1, -1, -1, -1}, // 98 
-    { 1,  8,  3,  6,  8,  1,  4,  8,  6, 11,  6,  1, -1, -1, -1, -1}, // 99 
-    { 9,  1,  4,  4,  1,  2,  4,  2,  6, -1, -1, -1, -1, -1, -1, -1}, // 100  
-    { 8,  3,  0,  9,  1,  2,  9,  2,  4,  4,  2,  6, -1, -1, -1, -1}, // 101  
-    { 4,  0,  2,  6,  4,  2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 102  
-    { 2,  8,  3,  4,  8,  2,  6,  4,  2, -1, -1, -1, -1, -1, -1, -1}, // 103  
-    { 9, 11,  4,  4, 11,  6,  3, 10,  2, -1, -1, -1, -1, -1, -1, -1}, // 104  
-    { 2,  0,  8, 10,  2,  8, 11,  4,  9,  6,  4, 11, -1, -1, -1, -1}, // 105  
-    { 2,  3, 10,  6,  0,  1,  4,  0,  6, 11,  6,  1, -1, -1, -1, -1}, // 106  
-    { 1,  6,  4, 11,  6,  1,  1,  4,  8, 10,  2,  1,  1,  8, 10, -1}, // 107  
-    { 4,  9,  6,  6,  9,  3,  3,  9,  1,  3, 10,  6, -1, -1, -1, -1}, // 108  
-    { 1,  8, 10,  0,  8,  1,  1, 10,  6,  4,  9,  1,  1,  6,  4, -1}, // 109  
-    { 6,  3, 10,  0,  3,  6,  4,  0,  6, -1, -1, -1, -1, -1, -1, -1}, // 110  
-    { 8,  6,  4,  8, 10,  6, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 111  
-    { 6,  7, 11, 11,  7,  8, 11,  8,  9, -1, -1, -1, -1, -1, -1, -1}, // 112  
-    { 3,  0,  7,  7,  0, 11, 11,  0,  9, 11,  6,  7, -1, -1, -1, -1}, // 113  
-    { 7, 11,  6,  7,  1, 11,  8,  1,  7,  0,  1,  8, -1, -1, -1, -1}, // 114  
-    { 7, 11,  6,  1, 11,  7,  3,  1,  7, -1, -1, -1, -1, -1, -1, -1}, // 115 
-    { 6,  1,  2,  8,  1,  6,  9,  1,  8,  7,  8,  6, -1, -1, -1, -1}, // 116  
-    { 9,  2,  6,  1,  2,  9,  9,  6,  7,  3,  0,  9,  9,  7,  3, -1}, // 117  
-    { 0,  7,  8,  6,  7,  0,  2,  6,  0, -1, -1, -1, -1, -1, -1, -1}, // 118  
-    { 2,  7,  3,  2,  6,  7, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 119  
-    {10,  2,  3,  8, 11,  6,  9, 11,  8,  7,  8,  6, -1, -1, -1, -1}, // 120  
-    { 7,  2,  0, 10,  2,  7,  7,  0,  9, 11,  6,  7,  7,  9, 11, -1}, // 121 
-    { 0,  1,  8,  8,  1,  7,  7,  1, 11, 11,  6,  7, 10,  2,  3, -1}, // 122  
-    { 1, 10,  2,  7, 10,  1,  1, 11,  6,  1,  6,  7, -1, -1, -1, -1}, // 123  
-    { 6,  8,  9,  7,  8,  6,  6,  9,  1,  3, 10,  6,  6,  1,  3, -1}, // 124  
-    { 1,  0,  9,  7, 10,  6, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 125  
-    { 0,  7,  8,  6,  7,  0,  0,  3, 10,  0, 10,  6, -1, -1, -1, -1}, // 126  
-    { 6,  7, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 127  
-    {10,  7,  6, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 128  
-    { 8,  3,  0,  6, 10,  7, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 129  
-    { 9,  0,  1,  6, 10,  7, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 130  
-    { 9,  8,  1,  1,  8,  3,  6, 10,  7, -1, -1, -1, -1, -1, -1, -1}, // 131  
-    { 2, 11,  1,  7,  6, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 132  
-    {11,  1,  2,  8,  3,  0,  7,  6, 10, -1, -1, -1, -1, -1, -1, -1}, // 133  
-    { 0,  2,  9,  9,  2, 11,  7,  6, 10, -1, -1, -1, -1, -1, -1, -1}, // 134  
-    { 7,  6, 10,  3,  2, 11,  3, 11,  8,  8, 11,  9, -1, -1, -1, -1}, // 135  
-    { 3,  7,  2,  7,  6,  2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 136  
-    { 8,  7,  0,  0,  7,  6,  0,  6,  2, -1, -1, -1, -1, -1, -1, -1}, // 137  
-    { 6,  2,  7,  7,  2,  3,  9,  0,  1, -1, -1, -1, -1, -1, -1, -1}, // 138  
-    { 2,  1,  6,  6,  1,  8,  8,  1,  9,  6,  8,  7, -1, -1, -1, -1}, // 139  
-    { 6, 11,  7,  7, 11,  1,  7,  1,  3, -1, -1, -1, -1, -1, -1, -1}, // 140  
-    { 6, 11,  7, 11,  1,  7,  7,  1,  8,  8,  1,  0, -1, -1, -1, -1}, // 141  
-    { 7,  0,  3, 11,  0,  7,  9,  0, 11,  7,  6, 11, -1, -1, -1, -1}, // 142  
-    {11,  7,  6,  8,  7, 11,  9,  8, 11, -1, -1, -1, -1, -1, -1, -1}, // 143  
-    { 4,  6,  8,  6, 10,  8, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 144  
-    {10,  3,  6,  6,  3,  0,  6,  0,  4, -1, -1, -1, -1, -1, -1, -1}, // 145  
-    {10,  8,  6,  6,  8,  4,  1,  9,  0, -1, -1, -1, -1, -1, -1, -1}, // 146  
-    { 6,  9,  4,  3,  9,  6,  1,  9,  3,  6, 10,  3, -1, -1, -1, -1}, // 147  
-    { 4,  6,  8,  8,  6, 10,  1,  2, 11, -1, -1, -1, -1, -1, -1, -1}, // 148  
-    {11,  1,  2, 10,  3,  0, 10,  0,  6,  6,  0,  4, -1, -1, -1, -1}, // 149  
-    { 8,  4, 10, 10,  4,  6,  9,  0,  2,  9,  2, 11, -1, -1, -1, -1}, // 150  
-    { 3, 11,  9,  2, 11,  3,  3,  9,  4,  6, 10,  3,  3,  4,  6, -1}, // 151  
-    { 3,  8,  2,  2,  8,  4,  2,  4,  6, -1, -1, -1, -1, -1, -1, -1}, // 152  
-    { 2,  0,  4,  2,  4,  6, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 153  
-    { 0,  1,  9,  4,  2,  3,  6,  2,  4,  8,  4,  3, -1, -1, -1, -1}, // 154  
-    { 4,  1,  9,  2,  1,  4,  6,  2,  4, -1, -1, -1, -1, -1, -1, -1}, // 155  
-    { 3,  8,  1,  1,  8,  6,  6,  8,  4,  1,  6, 11, -1, -1, -1, -1}, // 156  
-    { 0, 11,  1,  6, 11,  0,  4,  6,  0, -1, -1, -1, -1, -1, -1, -1}, // 157  
-    { 3,  4,  6,  8,  4,  3,  3,  6, 11,  9,  0,  3,  3, 11,  9, -1}, // 158  
-    { 4, 11,  9,  4,  6, 11, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 159  
-    { 5,  4,  9, 10,  7,  6, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 160  
-    { 3,  0,  8,  5,  4,  9,  6, 10,  7, -1, -1, -1, -1, -1, -1, -1}, // 161  
-    { 1,  5,  0,  0,  5,  4, 10,  7,  6, -1, -1, -1, -1, -1, -1, -1}, // 162  
-    { 6, 10,  7,  4,  8,  3,  4,  3,  5,  5,  3,  1, -1, -1, -1, -1}, // 163  
-    { 4,  9,  5,  2, 11,  1, 10,  7,  6, -1, -1, -1, -1, -1, -1, -1}, // 164  
-    { 7,  6, 10, 11,  1,  2,  3,  0,  8,  5,  4,  9, -1, -1, -1, -1}, // 165  
-    {10,  7,  6, 11,  5,  4, 11,  4,  2,  2,  4,  0, -1, -1, -1, -1}, // 166  
-    { 8,  3,  4,  4,  3,  5,  5,  3,  2,  2, 11,  5,  6, 10,  7, -1}, // 167  
-    { 3,  7,  2,  2,  7,  6,  9,  5,  4, -1, -1, -1, -1, -1, -1, -1}, // 168  
-    { 4,  9,  5,  6,  0,  8,  2,  0,  6,  7,  6,  8, -1, -1, -1, -1}, // 169  
-    { 2,  3,  6,  6,  3,  7,  0,  1,  5,  0,  5,  4, -1, -1, -1, -1}, // 170  
-    { 8,  6,  2,  7,  6,  8,  8,  2,  1,  5,  4,  8,  8,  1,  5, -1}, // 171 
-    { 4,  9,  5,  6, 11,  1,  6,  1,  7,  7,  1,  3, -1, -1, -1, -1}, // 172  
-    {11,  1,  6,  6,  1,  7,  7,  1,  0,  0,  8,  7,  4,  9,  5, -1}, // 173  
-    {11,  4,  0,  5,  4, 11, 11,  0,  3,  7,  6, 11, 11,  3,  7, -1}, // 174  
-    {11,  7,  6,  8,  7, 11, 11,  5,  4, 11,  4,  8, -1, -1, -1, -1}, // 175  
-    { 5,  6,  9,  9,  6, 10,  9, 10,  8, -1, -1, -1, -1, -1, -1, -1}, // 176  
-    {10,  3,  6,  3,  0,  6,  6,  0,  5,  5,  0,  9, -1, -1, -1, -1}, // 177  
-    { 8,  0, 10, 10,  0,  5,  5,  0,  1, 10,  5,  6, -1, -1, -1, -1}, // 178  
-    { 3,  6, 10,  5,  6,  3,  1,  5,  3, -1, -1, -1, -1, -1, -1, -1}, // 179  
-    {11,  1,  2, 10,  9,  5,  8,  9, 10,  6, 10,  5, -1, -1, -1, -1}, // 180  
-    { 3,  0, 10, 10,  0,  6,  6,  0,  9,  9,  5,  6, 11,  1,  2, -1}, // 181  
-    { 5, 10,  8,  6, 10,  5,  5,  8,  0,  2, 11,  5,  5,  0,  2, -1}, // 182  
-    { 3,  6, 10,  5,  6,  3,  3,  2, 11,  3, 11,  5, -1, -1, -1, -1}, // 183  
-    { 9,  5,  8,  8,  5,  2,  2,  5,  6,  2,  3,  8, -1, -1, -1, -1}, // 184  
-    { 6,  9,  5,  0,  9,  6,  2,  0,  6, -1, -1, -1, -1, -1, -1, -1}, // 185  
-    { 8,  1,  5,  0,  1,  8,  8,  5,  6,  2,  3,  8,  8,  6,  2, -1}, // 186  
-    { 6,  1,  5,  6,  2,  1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 187  
-    { 6,  1,  3, 11,  1,  6,  6,  3,  8,  9,  5,  6,  6,  8,  9, -1}, // 188  
-    { 0, 11,  1,  6, 11,  0,  0,  9,  5,  0,  5,  6, -1, -1, -1, -1}, // 189  
-    { 8,  0,  3, 11,  5,  6, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 190  
-    { 6, 11,  5, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 191  
-    {11, 10,  5, 10,  7,  5, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 192  
-    {11, 10,  5,  5, 10,  7,  0,  8,  3, -1, -1, -1, -1, -1, -1, -1}, // 193  
-    { 7,  5, 10, 10,  5, 11,  0,  1,  9, -1, -1, -1, -1, -1, -1, -1}, // 194  
-    { 5, 11,  7,  7, 11, 10,  1,  9,  8,  1,  8,  3, -1, -1, -1, -1}, // 195  
-    { 2, 10,  1,  1, 10,  7,  1,  7,  5, -1, -1, -1, -1, -1, -1, -1}, // 196  
-    { 3,  0,  8,  7,  1,  2,  5,  1,  7, 10,  7,  2, -1, -1, -1, -1}, // 197  
-    { 5,  9,  7,  7,  9,  2,  2,  9,  0,  7,  2, 10, -1, -1, -1, -1}, // 198  
-    { 2,  7,  5, 10,  7,  2,  2,  5,  9,  8,  3,  2,  2,  9,  8, -1}, // 199  
-    {11,  2,  5,  5,  2,  3,  5,  3,  7, -1, -1, -1, -1, -1, -1, -1}, // 200  
-    { 0,  8,  2,  2,  8,  5,  5,  8,  7,  5, 11,  2, -1, -1, -1, -1}, // 201  
-    { 1,  9,  0,  3,  5, 11,  7,  5,  3,  2,  3, 11, -1, -1, -1, -1}, // 202  
-    { 2,  9,  8,  1,  9,  2,  2,  8,  7,  5, 11,  2,  2,  7,  5, -1}, // 203  
-    { 5,  1,  3,  5,  3,  7, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 204  
-    { 7,  0,  8,  1,  0,  7,  5,  1,  7, -1, -1, -1, -1, -1, -1, -1}, // 205  
-    { 3,  9,  0,  5,  9,  3,  7,  5,  3, -1, -1, -1, -1, -1, -1, -1}, // 206  
-    { 7,  9,  8,  7,  5,  9, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 207  
-    { 4,  5,  8,  8,  5, 11,  8, 11, 10, -1, -1, -1, -1, -1, -1, -1}, // 208  
-    { 4,  5,  0,  0,  5, 10, 10,  5, 11,  0, 10,  3, -1, -1, -1, -1}, // 209  
-    { 9,  0,  1, 11,  8,  4, 10,  8, 11,  5, 11,  4, -1, -1, -1, -1}, // 210  
-    { 4, 11, 10,  5, 11,  4,  4, 10,  3,  1,  9,  4,  4,  3,  1, -1}, // 211  
-    { 1,  2,  5,  5,  2,  8,  8,  2, 10,  8,  4,  5, -1, -1, -1, -1}, // 212  
-    {10,  0,  4,  3,  0, 10, 10,  4,  5,  1,  2, 10, 10,  5,  1, -1}, // 213  
-    { 5,  0,  2,  9,  0,  5,  5,  2, 10,  8,  4,  5,  5, 10,  8, -1}, // 214  
-    { 5,  9,  4,  3,  2, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 215  
-    {11,  2,  5,  2,  3,  5,  5,  3,  4,  4,  3,  8, -1, -1, -1, -1}, // 216  
-    { 2,  5, 11,  4,  5,  2,  0,  4,  2, -1, -1, -1, -1, -1, -1, -1}, // 217  
-    { 2,  3, 11, 11,  3,  5,  5,  3,  8,  8,  4,  5,  9,  0,  1, -1}, // 218  
-    { 2,  5, 11,  4,  5,  2,  2,  1,  9,  2,  9,  4, -1, -1, -1, -1}, // 219  
-    { 5,  8,  4,  3,  8,  5,  1,  3,  5, -1, -1, -1, -1, -1, -1, -1}, // 220  
-    { 5,  0,  4,  5,  1,  0, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 221  
-    { 5,  8,  4,  3,  8,  5,  5,  9,  0,  5,  0,  3, -1, -1, -1, -1}, // 222  
-    { 5,  9,  4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 223  
-    { 7,  4, 10, 10,  4,  9, 10,  9, 11, -1, -1, -1, -1, -1, -1, -1}, // 224  
-    { 3,  0,  8,  7,  4,  9,  7,  9, 10, 10,  9, 11, -1, -1, -1, -1}, // 225  
-    {10,  1, 11,  4,  1, 10,  0,  1,  4, 10,  7,  4, -1, -1, -1, -1}, // 226  
-    { 4,  3,  1,  8,  3,  4,  4,  1, 11, 10,  7,  4,  4, 11, 10, -1}, // 227  
-    { 7,  4, 10,  4,  9, 10, 10,  9,  2,  2,  9,  1, -1, -1, -1, -1}, // 228  
-    { 4,  9,  7,  7,  9, 10, 10,  9,  1,  1,  2, 10,  3,  0,  8, -1}, // 229  
-    { 4, 10,  7,  2, 10,  4,  0,  2,  4, -1, -1, -1, -1, -1, -1, -1}, // 230  
-    { 4, 10,  7,  2, 10,  4,  4,  8,  3,  4,  3,  2, -1, -1, -1, -1}, // 231  
-    {11,  2,  9,  9,  2,  7,  7,  2,  3,  9,  7,  4, -1, -1, -1, -1}, // 232  
-    { 7,  9, 11,  4,  9,  7,  7, 11,  2,  0,  8,  7,  7,  2,  0, -1}, // 233  
-    {11,  3,  7,  2,  3, 11, 11,  7,  4,  0,  1, 11, 11,  4,  0, -1}, // 234  
-    { 2,  1, 11,  4,  8,  7, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 235  
-    { 1,  4,  9,  7,  4,  1,  3,  7,  1, -1, -1, -1, -1, -1, -1, -1}, // 236  
-    { 1,  4,  9,  7,  4,  1,  1,  0,  8,  1,  8,  7, -1, -1, -1, -1}, // 237  
-    { 3,  4,  0,  3,  7,  4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 238  
-    { 7,  4,  8, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 239  
-    { 8,  9, 11,  8, 11, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 240  
-    { 9,  3,  0, 10,  3,  9, 11, 10,  9, -1, -1, -1, -1, -1, -1, -1}, // 241  
-    {11,  0,  1,  8,  0, 11, 10,  8, 11, -1, -1, -1, -1, -1, -1, -1}, // 242  
-    {11,  3,  1, 11, 10,  3, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 243  
-    {10,  1,  2,  9,  1, 10,  8,  9, 10, -1, -1, -1, -1, -1, -1, -1}, // 244  
-    { 9,  3,  0, 10,  3,  9,  9,  1,  2,  9,  2, 10, -1, -1, -1, -1}, // 245  
-    {10,  0,  2, 10,  8,  0, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 246  
-    {10,  3,  2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 247  
-    { 8,  2,  3, 11,  2,  8,  9, 11,  8, -1, -1, -1, -1, -1, -1, -1}, // 248  
-    { 2,  9, 11,  2,  0,  9, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 249  
-    { 8,  2,  3, 11,  2,  8,  8,  0,  1,  8,  1, 11, -1, -1, -1, -1}, // 250  
-    { 2,  1, 11, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 251  
-    { 8,  1,  3,  8,  9,  1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 252  
-    { 1,  0,  9, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 253  
-    { 8,  0,  3, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 254  
-    {-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}  // 255  
+static char marching_cube_triangles[256][16] =
+    {
+        {-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}, // 0
+        {3, 0, 8, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},    // 1
+        {9, 0, 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},    // 2
+        {3, 1, 8, 1, 9, 8, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},       // 3
+        {11, 1, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},   // 4
+        {3, 0, 8, 11, 1, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},      // 5
+        {11, 9, 2, 9, 0, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},      // 6
+        {3, 2, 8, 8, 2, 11, 8, 11, 9, -1, -1, -1, -1, -1, -1, -1},        // 7
+        {2, 3, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},   // 8
+        {2, 0, 10, 0, 8, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},     // 9
+        {0, 1, 9, 10, 2, 3, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},      // 10
+        {2, 1, 10, 10, 1, 9, 10, 9, 8, -1, -1, -1, -1, -1, -1, -1},       // 11
+        {1, 3, 11, 3, 10, 11, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},    // 12
+        {1, 0, 11, 11, 0, 8, 11, 8, 10, -1, -1, -1, -1, -1, -1, -1},      // 13
+        {0, 3, 9, 9, 3, 10, 9, 10, 11, -1, -1, -1, -1, -1, -1, -1},       // 14
+        {11, 9, 8, 10, 11, 8, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},    // 15
+        {8, 4, 7, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},    // 16
+        {0, 4, 3, 4, 7, 3, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},       // 17
+        {9, 0, 1, 7, 8, 4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},       // 18
+        {9, 4, 1, 1, 4, 7, 1, 7, 3, -1, -1, -1, -1, -1, -1, -1},          // 19
+        {11, 1, 2, 7, 8, 4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},      // 20
+        {7, 3, 4, 4, 3, 0, 11, 1, 2, -1, -1, -1, -1, -1, -1, -1},         // 21
+        {11, 9, 2, 2, 9, 0, 7, 8, 4, -1, -1, -1, -1, -1, -1, -1},         // 22
+        {9, 2, 11, 7, 2, 9, 3, 2, 7, 4, 7, 9, -1, -1, -1, -1},            // 23
+        {7, 8, 4, 2, 3, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},      // 24
+        {7, 10, 4, 4, 10, 2, 4, 2, 0, -1, -1, -1, -1, -1, -1, -1},        // 25
+        {1, 9, 0, 7, 8, 4, 10, 2, 3, -1, -1, -1, -1, -1, -1, -1},         // 26
+        {10, 4, 7, 10, 9, 4, 2, 9, 10, 1, 9, 2, -1, -1, -1, -1},          // 27
+        {1, 3, 11, 11, 3, 10, 4, 7, 8, -1, -1, -1, -1, -1, -1, -1},       // 28
+        {11, 1, 10, 10, 1, 4, 4, 1, 0, 4, 7, 10, -1, -1, -1, -1},         // 29
+        {8, 4, 7, 10, 9, 0, 11, 9, 10, 3, 10, 0, -1, -1, -1, -1},         // 30
+        {10, 4, 7, 9, 4, 10, 11, 9, 10, -1, -1, -1, -1, -1, -1, -1},      // 31
+        {4, 9, 5, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},    // 32
+        {4, 9, 5, 3, 0, 8, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},       // 33
+        {4, 0, 5, 0, 1, 5, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},       // 34
+        {4, 8, 5, 5, 8, 3, 5, 3, 1, -1, -1, -1, -1, -1, -1, -1},          // 35
+        {11, 1, 2, 4, 9, 5, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},      // 36
+        {8, 3, 0, 11, 1, 2, 5, 4, 9, -1, -1, -1, -1, -1, -1, -1},         // 37
+        {11, 5, 2, 2, 5, 4, 2, 4, 0, -1, -1, -1, -1, -1, -1, -1},         // 38
+        {5, 2, 11, 5, 3, 2, 4, 3, 5, 8, 3, 4, -1, -1, -1, -1},            // 39
+        {4, 9, 5, 10, 2, 3, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},      // 40
+        {2, 0, 10, 10, 0, 8, 5, 4, 9, -1, -1, -1, -1, -1, -1, -1},        // 41
+        {4, 0, 5, 5, 0, 1, 10, 2, 3, -1, -1, -1, -1, -1, -1, -1},         // 42
+        {5, 2, 1, 8, 2, 5, 10, 2, 8, 5, 4, 8, -1, -1, -1, -1},            // 43
+        {10, 11, 3, 3, 11, 1, 4, 9, 5, -1, -1, -1, -1, -1, -1, -1},       // 44
+        {5, 4, 9, 1, 0, 8, 1, 8, 11, 11, 8, 10, -1, -1, -1, -1},          // 45
+        {0, 5, 4, 10, 5, 0, 11, 5, 10, 3, 10, 0, -1, -1, -1, -1},         // 46
+        {8, 5, 4, 11, 5, 8, 10, 11, 8, -1, -1, -1, -1, -1, -1, -1},       // 47
+        {8, 9, 7, 9, 5, 7, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},       // 48
+        {0, 9, 3, 3, 9, 5, 3, 5, 7, -1, -1, -1, -1, -1, -1, -1},          // 49
+        {8, 0, 7, 7, 0, 1, 7, 1, 5, -1, -1, -1, -1, -1, -1, -1},          // 50
+        {3, 1, 5, 7, 3, 5, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},       // 51
+        {8, 9, 7, 7, 9, 5, 2, 11, 1, -1, -1, -1, -1, -1, -1, -1},         // 52
+        {2, 11, 1, 0, 9, 5, 0, 5, 3, 3, 5, 7, -1, -1, -1, -1},            // 53
+        {2, 8, 0, 5, 8, 2, 7, 8, 5, 2, 11, 5, -1, -1, -1, -1},            // 54
+        {5, 2, 11, 3, 2, 5, 7, 3, 5, -1, -1, -1, -1, -1, -1, -1},         // 55
+        {5, 7, 9, 9, 7, 8, 2, 3, 10, -1, -1, -1, -1, -1, -1, -1},         // 56
+        {7, 9, 5, 2, 9, 7, 0, 9, 2, 10, 2, 7, -1, -1, -1, -1},            // 57
+        {10, 2, 3, 8, 0, 1, 8, 1, 7, 7, 1, 5, -1, -1, -1, -1},            // 58
+        {1, 10, 2, 7, 10, 1, 5, 7, 1, -1, -1, -1, -1, -1, -1, -1},        // 59
+        {8, 9, 5, 7, 8, 5, 3, 11, 1, 10, 11, 3, -1, -1, -1, -1},          // 60
+        {0, 5, 7, 9, 5, 0, 0, 7, 10, 11, 1, 0, 0, 10, 11, -1},            // 61
+        {0, 10, 11, 3, 10, 0, 0, 11, 5, 7, 8, 0, 0, 5, 7, -1},            // 62
+        {5, 10, 11, 5, 7, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},    // 63
+        {5, 11, 6, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},   // 64
+        {3, 0, 8, 6, 5, 11, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},      // 65
+        {1, 9, 0, 6, 5, 11, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},      // 66
+        {3, 1, 8, 8, 1, 9, 6, 5, 11, -1, -1, -1, -1, -1, -1, -1},         // 67
+        {5, 1, 6, 1, 2, 6, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},       // 68
+        {5, 1, 6, 6, 1, 2, 8, 3, 0, -1, -1, -1, -1, -1, -1, -1},          // 69
+        {5, 9, 6, 6, 9, 0, 6, 0, 2, -1, -1, -1, -1, -1, -1, -1},          // 70
+        {8, 5, 9, 2, 5, 8, 6, 5, 2, 8, 3, 2, -1, -1, -1, -1},             // 71
+        {10, 2, 3, 5, 11, 6, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},     // 72
+        {8, 10, 0, 0, 10, 2, 5, 11, 6, -1, -1, -1, -1, -1, -1, -1},       // 73
+        {9, 0, 1, 10, 2, 3, 6, 5, 11, -1, -1, -1, -1, -1, -1, -1},        // 74
+        {6, 5, 11, 2, 1, 9, 2, 9, 10, 10, 9, 8, -1, -1, -1, -1},          // 75
+        {10, 6, 3, 3, 6, 5, 3, 5, 1, -1, -1, -1, -1, -1, -1, -1},         // 76
+        {10, 0, 8, 5, 0, 10, 1, 0, 5, 6, 5, 10, -1, -1, -1, -1},          // 77
+        {6, 3, 10, 6, 0, 3, 5, 0, 6, 9, 0, 5, -1, -1, -1, -1},            // 78
+        {9, 6, 5, 10, 6, 9, 8, 10, 9, -1, -1, -1, -1, -1, -1, -1},        // 79
+        {6, 5, 11, 8, 4, 7, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},      // 80
+        {0, 4, 3, 3, 4, 7, 11, 6, 5, -1, -1, -1, -1, -1, -1, -1},         // 81
+        {0, 1, 9, 6, 5, 11, 7, 8, 4, -1, -1, -1, -1, -1, -1, -1},         // 82
+        {5, 11, 6, 7, 1, 9, 3, 1, 7, 4, 7, 9, -1, -1, -1, -1},            // 83
+        {2, 6, 1, 1, 6, 5, 8, 4, 7, -1, -1, -1, -1, -1, -1, -1},          // 84
+        {5, 1, 2, 6, 5, 2, 4, 3, 0, 7, 3, 4, -1, -1, -1, -1},             // 85
+        {7, 8, 4, 5, 9, 0, 5, 0, 6, 6, 0, 2, -1, -1, -1, -1},             // 86
+        {9, 7, 3, 4, 7, 9, 9, 3, 2, 6, 5, 9, 9, 2, 6, -1},                // 87
+        {2, 3, 10, 4, 7, 8, 5, 11, 6, -1, -1, -1, -1, -1, -1, -1},        // 88
+        {6, 5, 11, 2, 4, 7, 0, 4, 2, 10, 2, 7, -1, -1, -1, -1},           // 89
+        {9, 0, 1, 8, 4, 7, 10, 2, 3, 6, 5, 11, -1, -1, -1, -1},           // 90
+        {1, 9, 2, 2, 9, 10, 10, 9, 4, 4, 7, 10, 6, 5, 11, -1},            // 91
+        {7, 8, 4, 5, 3, 10, 1, 3, 5, 6, 5, 10, -1, -1, -1, -1},           // 92
+        {10, 5, 1, 6, 5, 10, 10, 1, 0, 4, 7, 10, 10, 0, 4, -1},           // 93
+        {9, 0, 5, 5, 0, 6, 6, 0, 3, 3, 10, 6, 7, 8, 4, -1},               // 94
+        {9, 6, 5, 10, 6, 9, 9, 4, 7, 9, 7, 10, -1, -1, -1, -1},           // 95
+        {9, 11, 4, 11, 6, 4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},     // 96
+        {6, 4, 11, 11, 4, 9, 3, 0, 8, -1, -1, -1, -1, -1, -1, -1},        // 97
+        {1, 11, 0, 0, 11, 6, 0, 6, 4, -1, -1, -1, -1, -1, -1, -1},        // 98
+        {1, 8, 3, 6, 8, 1, 4, 8, 6, 11, 6, 1, -1, -1, -1, -1},            // 99
+        {9, 1, 4, 4, 1, 2, 4, 2, 6, -1, -1, -1, -1, -1, -1, -1},          // 100
+        {8, 3, 0, 9, 1, 2, 9, 2, 4, 4, 2, 6, -1, -1, -1, -1},             // 101
+        {4, 0, 2, 6, 4, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},       // 102
+        {2, 8, 3, 4, 8, 2, 6, 4, 2, -1, -1, -1, -1, -1, -1, -1},          // 103
+        {9, 11, 4, 4, 11, 6, 3, 10, 2, -1, -1, -1, -1, -1, -1, -1},       // 104
+        {2, 0, 8, 10, 2, 8, 11, 4, 9, 6, 4, 11, -1, -1, -1, -1},          // 105
+        {2, 3, 10, 6, 0, 1, 4, 0, 6, 11, 6, 1, -1, -1, -1, -1},           // 106
+        {1, 6, 4, 11, 6, 1, 1, 4, 8, 10, 2, 1, 1, 8, 10, -1},             // 107
+        {4, 9, 6, 6, 9, 3, 3, 9, 1, 3, 10, 6, -1, -1, -1, -1},            // 108
+        {1, 8, 10, 0, 8, 1, 1, 10, 6, 4, 9, 1, 1, 6, 4, -1},              // 109
+        {6, 3, 10, 0, 3, 6, 4, 0, 6, -1, -1, -1, -1, -1, -1, -1},         // 110
+        {8, 6, 4, 8, 10, 6, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},      // 111
+        {6, 7, 11, 11, 7, 8, 11, 8, 9, -1, -1, -1, -1, -1, -1, -1},       // 112
+        {3, 0, 7, 7, 0, 11, 11, 0, 9, 11, 6, 7, -1, -1, -1, -1},          // 113
+        {7, 11, 6, 7, 1, 11, 8, 1, 7, 0, 1, 8, -1, -1, -1, -1},           // 114
+        {7, 11, 6, 1, 11, 7, 3, 1, 7, -1, -1, -1, -1, -1, -1, -1},        // 115
+        {6, 1, 2, 8, 1, 6, 9, 1, 8, 7, 8, 6, -1, -1, -1, -1},             // 116
+        {9, 2, 6, 1, 2, 9, 9, 6, 7, 3, 0, 9, 9, 7, 3, -1},                // 117
+        {0, 7, 8, 6, 7, 0, 2, 6, 0, -1, -1, -1, -1, -1, -1, -1},          // 118
+        {2, 7, 3, 2, 6, 7, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},       // 119
+        {10, 2, 3, 8, 11, 6, 9, 11, 8, 7, 8, 6, -1, -1, -1, -1},          // 120
+        {7, 2, 0, 10, 2, 7, 7, 0, 9, 11, 6, 7, 7, 9, 11, -1},             // 121
+        {0, 1, 8, 8, 1, 7, 7, 1, 11, 11, 6, 7, 10, 2, 3, -1},             // 122
+        {1, 10, 2, 7, 10, 1, 1, 11, 6, 1, 6, 7, -1, -1, -1, -1},          // 123
+        {6, 8, 9, 7, 8, 6, 6, 9, 1, 3, 10, 6, 6, 1, 3, -1},               // 124
+        {1, 0, 9, 7, 10, 6, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},      // 125
+        {0, 7, 8, 6, 7, 0, 0, 3, 10, 0, 10, 6, -1, -1, -1, -1},           // 126
+        {6, 7, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},   // 127
+        {10, 7, 6, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},   // 128
+        {8, 3, 0, 6, 10, 7, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},      // 129
+        {9, 0, 1, 6, 10, 7, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},      // 130
+        {9, 8, 1, 1, 8, 3, 6, 10, 7, -1, -1, -1, -1, -1, -1, -1},         // 131
+        {2, 11, 1, 7, 6, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},     // 132
+        {11, 1, 2, 8, 3, 0, 7, 6, 10, -1, -1, -1, -1, -1, -1, -1},        // 133
+        {0, 2, 9, 9, 2, 11, 7, 6, 10, -1, -1, -1, -1, -1, -1, -1},        // 134
+        {7, 6, 10, 3, 2, 11, 3, 11, 8, 8, 11, 9, -1, -1, -1, -1},         // 135
+        {3, 7, 2, 7, 6, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},       // 136
+        {8, 7, 0, 0, 7, 6, 0, 6, 2, -1, -1, -1, -1, -1, -1, -1},          // 137
+        {6, 2, 7, 7, 2, 3, 9, 0, 1, -1, -1, -1, -1, -1, -1, -1},          // 138
+        {2, 1, 6, 6, 1, 8, 8, 1, 9, 6, 8, 7, -1, -1, -1, -1},             // 139
+        {6, 11, 7, 7, 11, 1, 7, 1, 3, -1, -1, -1, -1, -1, -1, -1},        // 140
+        {6, 11, 7, 11, 1, 7, 7, 1, 8, 8, 1, 0, -1, -1, -1, -1},           // 141
+        {7, 0, 3, 11, 0, 7, 9, 0, 11, 7, 6, 11, -1, -1, -1, -1},          // 142
+        {11, 7, 6, 8, 7, 11, 9, 8, 11, -1, -1, -1, -1, -1, -1, -1},       // 143
+        {4, 6, 8, 6, 10, 8, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},      // 144
+        {10, 3, 6, 6, 3, 0, 6, 0, 4, -1, -1, -1, -1, -1, -1, -1},         // 145
+        {10, 8, 6, 6, 8, 4, 1, 9, 0, -1, -1, -1, -1, -1, -1, -1},         // 146
+        {6, 9, 4, 3, 9, 6, 1, 9, 3, 6, 10, 3, -1, -1, -1, -1},            // 147
+        {4, 6, 8, 8, 6, 10, 1, 2, 11, -1, -1, -1, -1, -1, -1, -1},        // 148
+        {11, 1, 2, 10, 3, 0, 10, 0, 6, 6, 0, 4, -1, -1, -1, -1},          // 149
+        {8, 4, 10, 10, 4, 6, 9, 0, 2, 9, 2, 11, -1, -1, -1, -1},          // 150
+        {3, 11, 9, 2, 11, 3, 3, 9, 4, 6, 10, 3, 3, 4, 6, -1},             // 151
+        {3, 8, 2, 2, 8, 4, 2, 4, 6, -1, -1, -1, -1, -1, -1, -1},          // 152
+        {2, 0, 4, 2, 4, 6, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},       // 153
+        {0, 1, 9, 4, 2, 3, 6, 2, 4, 8, 4, 3, -1, -1, -1, -1},             // 154
+        {4, 1, 9, 2, 1, 4, 6, 2, 4, -1, -1, -1, -1, -1, -1, -1},          // 155
+        {3, 8, 1, 1, 8, 6, 6, 8, 4, 1, 6, 11, -1, -1, -1, -1},            // 156
+        {0, 11, 1, 6, 11, 0, 4, 6, 0, -1, -1, -1, -1, -1, -1, -1},        // 157
+        {3, 4, 6, 8, 4, 3, 3, 6, 11, 9, 0, 3, 3, 11, 9, -1},              // 158
+        {4, 11, 9, 4, 6, 11, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},     // 159
+        {5, 4, 9, 10, 7, 6, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},      // 160
+        {3, 0, 8, 5, 4, 9, 6, 10, 7, -1, -1, -1, -1, -1, -1, -1},         // 161
+        {1, 5, 0, 0, 5, 4, 10, 7, 6, -1, -1, -1, -1, -1, -1, -1},         // 162
+        {6, 10, 7, 4, 8, 3, 4, 3, 5, 5, 3, 1, -1, -1, -1, -1},            // 163
+        {4, 9, 5, 2, 11, 1, 10, 7, 6, -1, -1, -1, -1, -1, -1, -1},        // 164
+        {7, 6, 10, 11, 1, 2, 3, 0, 8, 5, 4, 9, -1, -1, -1, -1},           // 165
+        {10, 7, 6, 11, 5, 4, 11, 4, 2, 2, 4, 0, -1, -1, -1, -1},          // 166
+        {8, 3, 4, 4, 3, 5, 5, 3, 2, 2, 11, 5, 6, 10, 7, -1},              // 167
+        {3, 7, 2, 2, 7, 6, 9, 5, 4, -1, -1, -1, -1, -1, -1, -1},          // 168
+        {4, 9, 5, 6, 0, 8, 2, 0, 6, 7, 6, 8, -1, -1, -1, -1},             // 169
+        {2, 3, 6, 6, 3, 7, 0, 1, 5, 0, 5, 4, -1, -1, -1, -1},             // 170
+        {8, 6, 2, 7, 6, 8, 8, 2, 1, 5, 4, 8, 8, 1, 5, -1},                // 171
+        {4, 9, 5, 6, 11, 1, 6, 1, 7, 7, 1, 3, -1, -1, -1, -1},            // 172
+        {11, 1, 6, 6, 1, 7, 7, 1, 0, 0, 8, 7, 4, 9, 5, -1},               // 173
+        {11, 4, 0, 5, 4, 11, 11, 0, 3, 7, 6, 11, 11, 3, 7, -1},           // 174
+        {11, 7, 6, 8, 7, 11, 11, 5, 4, 11, 4, 8, -1, -1, -1, -1},         // 175
+        {5, 6, 9, 9, 6, 10, 9, 10, 8, -1, -1, -1, -1, -1, -1, -1},        // 176
+        {10, 3, 6, 3, 0, 6, 6, 0, 5, 5, 0, 9, -1, -1, -1, -1},            // 177
+        {8, 0, 10, 10, 0, 5, 5, 0, 1, 10, 5, 6, -1, -1, -1, -1},          // 178
+        {3, 6, 10, 5, 6, 3, 1, 5, 3, -1, -1, -1, -1, -1, -1, -1},         // 179
+        {11, 1, 2, 10, 9, 5, 8, 9, 10, 6, 10, 5, -1, -1, -1, -1},         // 180
+        {3, 0, 10, 10, 0, 6, 6, 0, 9, 9, 5, 6, 11, 1, 2, -1},             // 181
+        {5, 10, 8, 6, 10, 5, 5, 8, 0, 2, 11, 5, 5, 0, 2, -1},             // 182
+        {3, 6, 10, 5, 6, 3, 3, 2, 11, 3, 11, 5, -1, -1, -1, -1},          // 183
+        {9, 5, 8, 8, 5, 2, 2, 5, 6, 2, 3, 8, -1, -1, -1, -1},             // 184
+        {6, 9, 5, 0, 9, 6, 2, 0, 6, -1, -1, -1, -1, -1, -1, -1},          // 185
+        {8, 1, 5, 0, 1, 8, 8, 5, 6, 2, 3, 8, 8, 6, 2, -1},                // 186
+        {6, 1, 5, 6, 2, 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},       // 187
+        {6, 1, 3, 11, 1, 6, 6, 3, 8, 9, 5, 6, 6, 8, 9, -1},               // 188
+        {0, 11, 1, 6, 11, 0, 0, 9, 5, 0, 5, 6, -1, -1, -1, -1},           // 189
+        {8, 0, 3, 11, 5, 6, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},      // 190
+        {6, 11, 5, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},   // 191
+        {11, 10, 5, 10, 7, 5, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},    // 192
+        {11, 10, 5, 5, 10, 7, 0, 8, 3, -1, -1, -1, -1, -1, -1, -1},       // 193
+        {7, 5, 10, 10, 5, 11, 0, 1, 9, -1, -1, -1, -1, -1, -1, -1},       // 194
+        {5, 11, 7, 7, 11, 10, 1, 9, 8, 1, 8, 3, -1, -1, -1, -1},          // 195
+        {2, 10, 1, 1, 10, 7, 1, 7, 5, -1, -1, -1, -1, -1, -1, -1},        // 196
+        {3, 0, 8, 7, 1, 2, 5, 1, 7, 10, 7, 2, -1, -1, -1, -1},            // 197
+        {5, 9, 7, 7, 9, 2, 2, 9, 0, 7, 2, 10, -1, -1, -1, -1},            // 198
+        {2, 7, 5, 10, 7, 2, 2, 5, 9, 8, 3, 2, 2, 9, 8, -1},               // 199
+        {11, 2, 5, 5, 2, 3, 5, 3, 7, -1, -1, -1, -1, -1, -1, -1},         // 200
+        {0, 8, 2, 2, 8, 5, 5, 8, 7, 5, 11, 2, -1, -1, -1, -1},            // 201
+        {1, 9, 0, 3, 5, 11, 7, 5, 3, 2, 3, 11, -1, -1, -1, -1},           // 202
+        {2, 9, 8, 1, 9, 2, 2, 8, 7, 5, 11, 2, 2, 7, 5, -1},               // 203
+        {5, 1, 3, 5, 3, 7, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},       // 204
+        {7, 0, 8, 1, 0, 7, 5, 1, 7, -1, -1, -1, -1, -1, -1, -1},          // 205
+        {3, 9, 0, 5, 9, 3, 7, 5, 3, -1, -1, -1, -1, -1, -1, -1},          // 206
+        {7, 9, 8, 7, 5, 9, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},       // 207
+        {4, 5, 8, 8, 5, 11, 8, 11, 10, -1, -1, -1, -1, -1, -1, -1},       // 208
+        {4, 5, 0, 0, 5, 10, 10, 5, 11, 0, 10, 3, -1, -1, -1, -1},         // 209
+        {9, 0, 1, 11, 8, 4, 10, 8, 11, 5, 11, 4, -1, -1, -1, -1},         // 210
+        {4, 11, 10, 5, 11, 4, 4, 10, 3, 1, 9, 4, 4, 3, 1, -1},            // 211
+        {1, 2, 5, 5, 2, 8, 8, 2, 10, 8, 4, 5, -1, -1, -1, -1},            // 212
+        {10, 0, 4, 3, 0, 10, 10, 4, 5, 1, 2, 10, 10, 5, 1, -1},           // 213
+        {5, 0, 2, 9, 0, 5, 5, 2, 10, 8, 4, 5, 5, 10, 8, -1},              // 214
+        {5, 9, 4, 3, 2, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},      // 215
+        {11, 2, 5, 2, 3, 5, 5, 3, 4, 4, 3, 8, -1, -1, -1, -1},            // 216
+        {2, 5, 11, 4, 5, 2, 0, 4, 2, -1, -1, -1, -1, -1, -1, -1},         // 217
+        {2, 3, 11, 11, 3, 5, 5, 3, 8, 8, 4, 5, 9, 0, 1, -1},              // 218
+        {2, 5, 11, 4, 5, 2, 2, 1, 9, 2, 9, 4, -1, -1, -1, -1},            // 219
+        {5, 8, 4, 3, 8, 5, 1, 3, 5, -1, -1, -1, -1, -1, -1, -1},          // 220
+        {5, 0, 4, 5, 1, 0, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},       // 221
+        {5, 8, 4, 3, 8, 5, 5, 9, 0, 5, 0, 3, -1, -1, -1, -1},             // 222
+        {5, 9, 4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},    // 223
+        {7, 4, 10, 10, 4, 9, 10, 9, 11, -1, -1, -1, -1, -1, -1, -1},      // 224
+        {3, 0, 8, 7, 4, 9, 7, 9, 10, 10, 9, 11, -1, -1, -1, -1},          // 225
+        {10, 1, 11, 4, 1, 10, 0, 1, 4, 10, 7, 4, -1, -1, -1, -1},         // 226
+        {4, 3, 1, 8, 3, 4, 4, 1, 11, 10, 7, 4, 4, 11, 10, -1},            // 227
+        {7, 4, 10, 4, 9, 10, 10, 9, 2, 2, 9, 1, -1, -1, -1, -1},          // 228
+        {4, 9, 7, 7, 9, 10, 10, 9, 1, 1, 2, 10, 3, 0, 8, -1},             // 229
+        {4, 10, 7, 2, 10, 4, 0, 2, 4, -1, -1, -1, -1, -1, -1, -1},        // 230
+        {4, 10, 7, 2, 10, 4, 4, 8, 3, 4, 3, 2, -1, -1, -1, -1},           // 231
+        {11, 2, 9, 9, 2, 7, 7, 2, 3, 9, 7, 4, -1, -1, -1, -1},            // 232
+        {7, 9, 11, 4, 9, 7, 7, 11, 2, 0, 8, 7, 7, 2, 0, -1},              // 233
+        {11, 3, 7, 2, 3, 11, 11, 7, 4, 0, 1, 11, 11, 4, 0, -1},           // 234
+        {2, 1, 11, 4, 8, 7, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},      // 235
+        {1, 4, 9, 7, 4, 1, 3, 7, 1, -1, -1, -1, -1, -1, -1, -1},          // 236
+        {1, 4, 9, 7, 4, 1, 1, 0, 8, 1, 8, 7, -1, -1, -1, -1},             // 237
+        {3, 4, 0, 3, 7, 4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},       // 238
+        {7, 4, 8, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},    // 239
+        {8, 9, 11, 8, 11, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},    // 240
+        {9, 3, 0, 10, 3, 9, 11, 10, 9, -1, -1, -1, -1, -1, -1, -1},       // 241
+        {11, 0, 1, 8, 0, 11, 10, 8, 11, -1, -1, -1, -1, -1, -1, -1},      // 242
+        {11, 3, 1, 11, 10, 3, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},    // 243
+        {10, 1, 2, 9, 1, 10, 8, 9, 10, -1, -1, -1, -1, -1, -1, -1},       // 244
+        {9, 3, 0, 10, 3, 9, 9, 1, 2, 9, 2, 10, -1, -1, -1, -1},           // 245
+        {10, 0, 2, 10, 8, 0, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},     // 246
+        {10, 3, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},   // 247
+        {8, 2, 3, 11, 2, 8, 9, 11, 8, -1, -1, -1, -1, -1, -1, -1},        // 248
+        {2, 9, 11, 2, 0, 9, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},      // 249
+        {8, 2, 3, 11, 2, 8, 8, 0, 1, 8, 1, 11, -1, -1, -1, -1},           // 250
+        {2, 1, 11, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},   // 251
+        {8, 1, 3, 8, 9, 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},       // 252
+        {1, 0, 9, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},    // 253
+        {8, 0, 3, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},    // 254
+        {-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}  // 255
 };
 
 #endif // METABALLS_IMPLEMENTATION