Hello, I am trying to mix 2d and 3d in opengl in pyglet, i.e. draw a
3d scene then switch to orthographic projection and draw stuff over
the top. I draw the 3d stuff, push the projection matrix to the
stack, do a glOrtho projection matrix, draw the 2d stuff, then pop
the previous matrix off the stack.
The 3d stuff draws fine but for some reason the 2d part isn't drawing
at all, even on its own.
Here's the code:
from pyglet.gl import *
from pyglet.window import key
from world import World
import control
class Window(pyglet.window.Window):
# resolution
width, height = 1024, 786
def __init__(self, width, height):
# initialise window
super(Window, self).__init__(width, height)
# set title
self.set_caption("OpenGL Doss")
# call update() at 30fps
pyglet.clock.schedule_interval(self.update, 1 / 30.0)
glEnable(GL_TEXTURE_2D) # enable textures
glShadeModel(GL_SMOOTH) # smooth shading of polygons
glClearColor(0.0, 0.0, 0.0, 0.0)
glClearDepth(1.0)
glDepthFunc(GL_LEQUAL)
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST) # make
stuff look nice
self.world = World() # initialise world
self.label = pyglet.text.Label('Hello, world',
font_name='Times New Roman',
font_size=20,
width=10, height=10)
def on_resize(self, width, height):
print 'on resize'
if height == 0:
height = 1
glViewport(0, 0, width, height) # specify viewport
# load perspective projection matrix
glMatrixMode(GL_PROJECTION)
glLoadIdentity()
gluPerspective(45, 1.0 * width / height, 0.1, 100.0)
#glLoadIdentity()
def on_draw(self):
self.set3d()
# draw 3d stuff
self.world.draw()
self.set2d()
# draw 2d stuff
self.draw2d()
self.unSet2d()
def update(self, dt):
"called at set interval during runtime"
#maze = self.world.maze
maze_platform = self.world.maze_platform
pacman = maze_platform.maze.pacman
maze_platform.update()
# send it world pointer
pacman.update(self.world)
def on_key_press(self, symbol, modifiers):
control.press(symbol, modifiers)
def on_key_release(self, symbol, modifiers):
control.release(symbol, modifiers)
def set3d(self):
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
glEnable(GL_DEPTH_TEST) # enable depth testing
# reset modelview matrix
glMatrixMode(GL_MODELVIEW)
glLoadIdentity()
def set2d(self):
glDisable(GL_DEPTH_TEST)
# store the projection matrix to restore later
glMatrixMode(GL_PROJECTION)
glPushMatrix()
# load orthographic projection matrix
glLoadIdentity()
far = 8192
glOrtho(-self.width / 2., self.width / 2., -self.height / 2.,
self.height / 2., 0, far)
# reset modelview
glMatrixMode(GL_MODELVIEW)
glLoadIdentity()
#glClear(GL_COLOR_BUFFER_BIT)
def unSet2d(self):
# load back the projection matrix saved before
glMatrixMode(GL_PROJECTION)
glPopMatrix()
def draw2d(self):
z=-6
n=100
glTranslatef(0, 0.0, -z)
glBegin(GL_TRIANGLES)
glVertex3f(0.0, n, 0.0)
glVertex3f(-n, -n, 0)
glVertex3f(n, -n, 0)
glEnd()
def main():
window = Window(Window.width, Window.height)
pyglet.app.run()
print 'framerate:', pyglet.clock.get_fps(), '(error checking =
%s)' % pyglet.options['debug_gl']
if __name__ == '__main__': main()
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