The code in your pastebin fails to even run for me.
In particular, your list indices in the display function are out of range (your list has 10 elements : python lists start at 0; you index from 0+1 to 10+1).
I think you also had some globals missing in the mouse handling function but that could be from me moving code around in an attempt to at least make it look like python ;)
Anyway, with these fixes, the code shown below DOES work for me, with no signs of GL matrix stack under/overflow !
import sys
from math import sin, cos
from random import randint
from OpenGL.GL import *
from OpenGL.GLU import *
from OpenGL.GLUT import *
#angle of rotation
xpos= ypos= zpos= xrot= yrot= angle= lastx= lasty = 0
#positions of the cubes
positionz = []
positionx = []
def init():
global positionz, positionx
glEnable(GL_DEPTH_TEST) #enable the depth testing
glEnable(GL_LIGHTING) #enable the lighting
glEnable(GL_LIGHT0) #enable LIGHT0, our Diffuse Light
glShadeModel(GL_SMOOTH) #set the shader to smooth shader
positionx = [randint(0, 10) for x in xrange(10)]
positionz = [randint(0, 10) for x in xrange(10)]
def camera():
global xrot, yrot, xpos, ypos, zpos
glRotatef(xrot,1.0,0.0,0.0) #rotate our camera on teh x-axis (left and right)
glRotatef(yrot,0.0,1.0,0.0) #rotate our camera on the y-axis (up and down)
glTranslated(-xpos,-ypos,-zpos) #translate the screen to the position of our camera
def display():
global angle
glClearColor(0.0,0.0,0.0,1.0) #clear the screen to black
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT) #clear the color buffer and the depth buffer
glLoadIdentity()
camera()
for x in xrange(10):
glPushMatrix()
glTranslated(-positionx[x] * 10, 0, -positionz[x] * 10) #translate the cube
glutSolidCube(2) #draw the cube
glPopMatrix()
glutSwapBuffers() #swap the buffers
angle += angle #increase the angle
def reshape(w, h):
glViewport(0, 0, w, h); #set the viewport to the current window specifications
glMatrixMode(GL_PROJECTION); #set the matrix to projection
glLoadIdentity();
gluPerspective(60, w / h, 1.0, 1000.0)
#set the perspective (angle of sight, width, height, , depth)
glMatrixMode(GL_MODELVIEW); #set the matrix back to model
def keyboard (key, x, y):
global xrot, xpos, ypos, zpos, xrot, yrot, angle, lastx, lasty, positionz, positionx
if (key=='q'):
xrot += 1
if (xrot >360):
xrot -= 360
if (key=='z'):
xrot -= 1;
if (xrot < -360): xrot += 360
if (key=='w'):
yrotrad = (yrot / 180 * 3.141592654)
xrotrad = (xrot / 180 * 3.141592654)
xpos += float(sin(yrotrad))
zpos -= float(cos(yrotrad))
ypos -= float(sin(xrotrad))
if (key=='s'):
yrotrad = (yrot / 180 * 3.141592654)
xrotrad = (xrot / 180 * 3.141592654)
xpos -= float(sin(yrotrad))
zpos += float(cos(yrotrad))
ypos += float(sin(xrotrad))
if (key=='d'):
yrotrad = (yrot / 180 * 3.141592654)
xpos += float(cos(yrotrad)) * 0.2
zpos += float(sin(yrotrad)) * 0.2
if (key=='a'):
yrotrad = (yrot / 180 * 3.141592654)
xpos -= float(cos(yrotrad)) * 0.2
zpos -= float(sin(yrotrad)) * 0.2
if (key==27):
sys.exit(0)
def mouseMovement(x, y):
global lastx, lasty, xrot, yrot
diffx=x-lastx #check the difference between the current x and the last x position
diffy=y-lasty #check the difference between the current y and the last y position
lastx=x #set lastx to the current x position
lasty=y #set lasty to the current y position
xrot += float(diffy) #set the xrot to xrot with the addition of the difference in the y position
yrot += float(diffx) #set the xrot to yrot with the addition of the difference in the x position
glutInit()
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH)
glutInitWindowSize(500, 500)
glutInitWindowPosition (100, 100)
glutCreateWindow("A basic OpenGL Window")
init()
glutDisplayFunc(display)
glutIdleFunc(display)
glutReshapeFunc(reshape)
glutPassiveMotionFunc(mouseMovement)
#check for mouse movement
glutKeyboardFunc (keyboard)
glutMainLoop()
