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

startPos = [0, 0, 0]
velocity = [1, 0, 0]
startTime = time.time()

def draw():
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
	glMatrixMode(GL_PROJECTION)
	glLoadIdentity()
	gluOrtho2D(-20, 20, -20, 20)
	glMatrixMode(GL_MODELVIEW)
	glLoadIdentity()

	glColor3f(1,1,1)
	glBegin(GL_LINES)
	glVertex3f(0,0,0)
	glVertex3fv(velocity)
	glEnd()

	t = time.time() - startTime
	pos = [0,0,0]
	for i in [0,1,2]:
		pos[i] = startPos[i] + velocity[i] * t
	glColor3f(1, 0.9, 0)
	glTranslatef(pos[0], pos[1], pos[2])
	glutSolidSphere(1, 6, 6)

	glutSwapBuffers()


def drawShape():
	pass

def keyboard(key, x, y):
	if key == chr(27):
		sys.exit(0)
	elif key == ' ':
		launchBall()

def launchBall():
	global startTime
	startTime = time.time()

def mouseButton(button, state, x, y):
	velocity[0] = (float(x) / glutGet(GLUT_WINDOW_WIDTH) - 0.5) * 10.0
	velocity[1] = -(float(y) / glutGet(GLUT_WINDOW_HEIGHT) - 0.5) * 10.0

def mouseMotion(x, y):
	velocity[0] = (float(x) / glutGet(GLUT_WINDOW_WIDTH) - 0.5) * 10.0
	velocity[1] = -(float(y) / glutGet(GLUT_WINDOW_HEIGHT) - 0.5) * 10.0


glutInit(sys.argv)
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH)
glutInitWindowSize(400, 400)
glutInitWindowPosition(0,0)
glutCreateWindow(sys.argv[0])
glutDisplayFunc(draw)
glutKeyboardFunc(keyboard)
glutMouseFunc(mouseButton)
glutMotionFunc(mouseMotion)
glutIdleFunc(glutPostRedisplay)
glEnable(GL_DEPTH_TEST)
glutMainLoop()