I'm trying to set numpy arrays as OpenGl textures in pygame. The problem is that only the first pixel is taken as texture data and instead of a random pattern (for example) I only get a random color every time.
import pygame
from pygame.locals import *
from OpenGL.GL import *
from OpenGL.GLU import *
import numpy as np
#Settings
width = 200
height = 300
resolution = (800,600)
texture_data = np.random.randint(256,size=(height, width, 3))
#pygame init
pygame.init()
gameDisplay = pygame.display.set_mode(resolution,OPENGL)
#OpenGL init
glMatrixMode(GL_PROJECTION)
glLoadIdentity()
glOrtho(0,resolution[0],0,resolution[1],-1,1)
glMatrixMode(GL_MODELVIEW)
glDisable(GL_DEPTH_TEST)
glClearColor(0.0,0.0,0.0,0.0)
glEnable(GL_TEXTURE_2D)
#Set texture
texture = glGenTextures(1)
glPixelStorei(GL_UNPACK_ALIGNMENT, 1)
glBindTexture(GL_TEXTURE_2D, texture)
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE)
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST)
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, texture_data)
glGenerateMipmap(GL_TEXTURE_2D)
glActiveTexture(GL_TEXTURE0)
#Clean start
glClear(GL_COLOR_BUFFER_BIT)
glLoadIdentity()
#draw rectangle
glTranslatef(300,200,0)
glBegin(GL_QUADS)
glVertex2f(0,0)
glVertex2f(0,height)
glVertex2f(width,height)
glVertex2f(width,0)
glEnd()
glFlush()
#game loop until exit
gameExit = False
while not gameExit:
for event in pygame.event.get():
if event.type == pygame.QUIT:
gameExit = True
#throttle
pygame.time.wait(100)
As pointed out by genpfault I was missing texture coordinates. I needed to add them to the rectangle drawing part.
Read this if you are lost on how texture mapping works:
OpenGL Programming Guide - Chapter 9 Texture Mapping