#

# Copyright (c) 2012 Peter de Rivaz

#

# Redistribution and use in source and binary forms, with or without

# modification, are permitted.

#

# Raspberry Pi 3d demo using OpenGLES 2.0 via Python

#

# Version 0.1 (Draws a rectangle using vertex and fragment shaders)

# Version 0.2 (Draws a Julia set on top of a Mandelbrot controlled by the mouse. Mandelbrot rendered to texture in advance.

import ctypes

import time

import math

# Pick up our constants extracted from the header files with prepare_constants.py

from egl import *

from gl2 import *

from gl2ext import *

import pymouse

# Define verbose=True to get debug messages

verbose = True

# Define some extra constants that the automatic extraction misses

EGL_DEFAULT_DISPLAY = 0

EGL_NO_CONTEXT = 0

EGL_NO_DISPLAY = 0

EGL_NO_SURFACE = 0

DISPMANX_PROTECTION_NONE = 0

# Open the libraries

bcm = ctypes.CDLL('libbcm_host.so')

opengles = ctypes.CDLL('libGLESv2.so')

openegl = ctypes.CDLL('libEGL.so')

eglint = ctypes.c_int

eglshort = ctypes.c_short

def eglints(L):

"""Converts a tuple to an array of eglints (would a pointer return be better?)"""

return (eglint*len(L))(*L)

eglfloat = ctypes.c_float

def eglfloats(L):

return (eglfloat*len(L))(*L)

def check(e):

raise ValueError

class EGL(object):

assert r

class demo():

raise ValueError

def showerror():

e=opengles.glGetError()

print hex(e)

if __name__ == "__main__":

egl = EGL()

d = demo()

d.draw_mandelbrot_to_texture(0.003)

m=pymouse.start_mouse()

while 1:

#offset=(400,600)

offset=(m.x,m.y)

d.draw_triangles(0.003,offset)

time.sleep(0.01)

if m.finished:

break

showerror()