import sys
import time
from random import *
from math import *
from OpenGL.GLUT import *
from OpenGL.GL import *
from OpenGL.GLU import *

class Circle:
    def __init__(self, x, y, radius, color):
        self.x = x
        self.y = y
        self.radius = radius
        self.color = color
    def draw(self):
        glColor3fv(self.color)
        glBegin(GL_TRIANGLE_FAN)
        glVertex2f(self.x, self.y)
        for i in range(0,30):
          glVertex2f(self.x + cos(radians(i*12.0)) * self.radius, 
                     self.y + sin(radians(i*12.0)) * self.radius)
        glEnd()

c = Circle(-10, 0, 5, [1,0,0])
d = Circle(4, 3, 3, [0,1,0])
objects = [c,d]

def draw():
    glClear(GL_COLOR_BUFFER_BIT)
    glLoadIdentity()
    for o in objects:
        o.draw()
    glutSwapBuffers()


def keyboard(key, x, y):
    if key == chr(27):
        sys.exit(0)
    elif key == ' ':
        objects.append(Circle(0, uniform(-10,10), 1, [random(), random(), random()]))

def update(dummy):
    glutTimerFunc(16, update, 0)
    for o in objects:
       o.x += uniform(-0.1,0.1)
    c.x = sin(time.time()) * 10
    glutPostRedisplay()

glutInit(sys.argv)
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB)
glutInitWindowSize(400, 400)
glutInitWindowPosition(0,0)
glutCreateWindow(sys.argv[0])
glutDisplayFunc(draw)
glutKeyboardFunc(keyboard)
glutTimerFunc(0, update, 0)
glMatrixMode(GL_PROJECTION)
gluOrtho2D(-10,10,-10,10)
glMatrixMode(GL_MODELVIEW)
glutMainLoop()