#! /usr/bin/env python
#testingcontext allows for the use of 
#Pygame, wxPython, or GLUT GUI systems with the same code.
from OpenGLContext import testingcontext
BaseContext = testingcontext.getInteractive()


from OpenGL.GL import *
from OpenGL.arrays import vbo

#points to numpy arrays
from OpenGLContext.arrays import *
import pygame
#shader convinience
from OpenGL.GL.shaders import *
from random import *

class TestContext( BaseContext ):
	"""Creates a simple vertex shader..."""
	def OnInit( self ):
	    VERTEX_SHADER = compileShader("""void main() {gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;}""", GL_VERTEX_SHADER)
	    FRAGMENT_SHADER = compileShader("""void main() {gl_FragColor = vec4( 0, 1, 0, 1 );}""", GL_FRAGMENT_SHADER)
	    self.shader = compileProgram(VERTEX_SHADER,FRAGMENT_SHADER)
	    
	    
	    self.vbo = vbo.VBO(
			array( [
				[  0, 1, 0 ],
				[  1,-1, 0 ],
				[  1,-1, 0 ],
				[  2,-1, 0 ],
				[  4,-1, 0 ],
				[  4, 1, 0 ],
				[  2,-1, 0 ],
				[  4, 1, 0 ],
				[  2, 1, 0 ],
			],'f')
		)
		
		
	def Render( self, mode):
		"""Render the geometry for the scene."""
		glUseProgram(self.shader)
		glRotate(60,0,1,1)
		try:
			self.vbo.bind()
			try:
			    glEnableClientState(GL_VERTEX_ARRAY)
			    glVertexPointerf( self.vbo )
			    glDrawArrays(GL_TRIANGLES, 0, 9)
			finally:
			    self.vbo.unbind()
			    glDisableClientState(GL_VERTEX_ARRAY)
		finally:
			glUseProgram( 0 )
		print random()
		self.vbo = vbo.VBO(
			array( [
				[  0, 1, 0 ],
				[  random(),-1, 0 ],
				[  1,-1, 0 ],
				[  2,-1, 0 ],
				[  4,-1, 0 ],
				[  4, 1, 0 ],
				[  2,-1, 0 ],
				[  4, 1, 0 ],
				[  2, 1, random() ],
			],'f')
		)

		
			
			
if __name__ == "__main__":
	TestContext.ContextMainLoop()
	
	
	while True:  
		rotation[0] += dAngle
        for event in pygame.event.get():
            if event.type == QUIT:
				exit()
            if event.type == K_ESCAPEYUP and event.key == K_ESCAPE:
            	exit()