dancing_dodecahedron.py

import sys
try:
  from OpenGL.GLUT import *
  from OpenGL.GL import *
  from OpenGL.GLU import *
except:
  print('Error: PyOpenGL not installed properly')
  sys.exit(  )

import math
import array
import signal
import random

def signal_handler(signal, frame):
        print('u pressed ctrl-c')
        sys.exit(0)

signal.signal(signal.SIGINT, signal_handler)
###signal.pause()

import math

PI = 3.141592653
ngon=120
angle_step=2*PI/ngon
r1_step = 0.005
r2_step = 0.001
delta=0.6
theta1 = 2*PI/ngon

fullscreen = False
mouseDown = False

xrot = 0.2
yrot = 0.0

xdiff = 0.0
ydiff = 0.0
ndisc = 20

def init():
#	glClearColor(0.93, 0.93, 0.93, 0.0)
	glClearColor(1.0,1.0,1.0,0.0)
	glClearColor(0.0, 0.0, 0.0, 1.0)
	glClearColor(0.0, 0.0, 0.0, 0.0)

	glEnable(GL_DEPTH_TEST)
	glDepthFunc(GL_LEQUAL)
	glClearDepth(1.0)

	return True

radius = 3.0
theta = 0.0
alpha = 0.0

def display():
	global xrot, yrot
	global cx, cy, cz
	global theta, alpha, radius
	global ndisc
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
	glLoadIdentity()

	
	rad = radius*(1+math.sin(xrot))+6.0
	cx = rad*math.sin(theta)*math.cos(alpha)
	cy = rad*math.cos(theta)
	cz = rad*math.sin(theta)*math.sin(alpha)
	alpha += xrot/1000.0*math.sin(theta)
	theta += yrot/1000.0*math.cos(theta)

	gluLookAt(
		cx, cy, cz,
		0.0, 0.0, 0.0,
		0.0, 1.0, 0.0)

	glRotatef(xrot, 1.0, 0.0, 0.0)
	glRotatef(yrot, 0.0, 1.0, 0.0)

    	glutWireCube(1)
 	glColor3f(0.5, 0.0, 1.0)
	#random_nos=random.randint(0,36)
	#while random_nos==0:
	#	random_nos=random.randint(0,36)
	#angle_quanta = 2*PI/random_nos
	#constant_radius = 5.0
	
	#for i in range(random_nos):
	#	radius = constant_radius*(1.0+math.sin(random_nos))
	glutWireDodecahedron()
    	glFlush()
    	glutSwapBuffers()


def resize(*args):
	glMatrixMode(GL_PROJECTION)
	glLoadIdentity()

	glViewport(0, 0, args[0], args[1])

	gluPerspective(45.0, 1.0 * args[0] / args[0], 1.0, 100.0)

	glMatrixMode(GL_MODELVIEW)
	glLoadIdentity()


def idle():
	global xrot, yrot
	global mouseDown
	if not (mouseDown):
		xrot += 0.03
		yrot += 0.04

	glutPostRedisplay()


def keyboard(*args):
	##print args[0]
	if (args[0]==27):
	##	print args[0]
		sys.exit(1)


def specialKeyboard(*args):
	##print args[0]
	if (args[0] == GLUT_KEY_F1):
		fullscreen = not(fullscreen)

		if (fullscreen):
			glutFullScreen()
		else:
			glutReshapeWindow(500, 500)
			glutPositionWindow(50, 50)

def mouse(*args):
	global xrot, yrot
	global xdiff, ydiff
	global mouseDown
	if (args[0] == GLUT_LEFT_BUTTON and args[1] == GLUT_DOWN):
		mouseDown = True
		xdiff = args[2] - yrot
		ydiff = -args[3] + xrot
	else:
		mouseDown = False


def mouseMotion(*args):
	global xrot, yrot
	global xdiff, ydiff
	global mouseDown
	if (mouseDown):
		yrot = args[0] - xdiff
		xrot = args[1] + ydiff
	glutPostRedisplay()


def main():
	glutInit(sys.argv)
	glutInitWindowPosition(50, 50)
	glutInitWindowSize(500, 500)

	glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE)

	glutCreateWindow("Dancing Dodecahedron")

	glutDisplayFunc(display)
	glutKeyboardFunc(keyboard)
	glutSpecialFunc(specialKeyboard)
	glutMouseFunc(mouse)
	glutMotionFunc(mouseMotion)
	glutReshapeFunc(resize)

	if not (init()):
		return 1

	glutIdleFunc(idle)

	glutMainLoop()

	return 0

if __name__ == "__main__":
    main()