[OpenGL]Multiple Channel Filter

Jerry小坏

1. 
   
2. qglBindTexture(GL_TEXTURE_2D, pFBO->s_hBackBufferTex);
   
3. 
   
4. qglBegin(GL_QUADS);
   
5. 
   
6. qglColor4f(1.0,1.0,1.0,1.0);
   
7. qglTexCoord2f(0,1); qglVertex3f(0,0,0);//ul
   
8. qglTexCoord2f(0.5,1); qglVertex3f(glwidth/2, 0,0);//ru
   
9. qglTexCoord2f(0.5,0.5); qglVertex3f(glwidth/2, glheight/2,0);//lr
   
10. qglTexCoord2f(0,0.5); qglVertex3f(0, glheight/2,0);//ll
    
11. 
    
12. qglColor4f(1.0,1.0,0.0,1.0);
    
13. qglTexCoord2f(0.5,1); qglVertex3f(glwidth/2,0,0);
    
14. qglTexCoord2f(1,1); qglVertex3f(glwidth, 0,0);
    
15. qglTexCoord2f(1,0.5); qglVertex3f(glwidth, glheight/2,0);
    
16. qglTexCoord2f(0.5,0.5); qglVertex3f(glwidth/2, glheight/2,0);
    
17. 
    
18. qglColor4f(1.0,0.0,0.0,1.0);
    
19. qglTexCoord2f(0,0.5); qglVertex3f(0,glheight/2,0);
    
20. qglTexCoord2f(0.5,0.5); qglVertex3f(glwidth/2, glheight/2,0);
    
21. qglTexCoord2f(0.5,0); qglVertex3f(glwidth/2, glheight,0);
    
22. qglTexCoord2f(0,0); qglVertex3f(0, glheight,0);
    
23. 
    
24. qglColor4f(0.0,1.0,1.0,1.0);
    
25. qglTexCoord2f(0.5,0.5); qglVertex3f(glwidth/2,glheight/2,0);
    
26. qglTexCoord2f(1,0.5); qglVertex3f(glwidth, glheight/2,0);
    
27. qglTexCoord2f(1,0); qglVertex3f(glwidth, glheight,0);
    
28. qglTexCoord2f(0.5,0); qglVertex3f(glwidth/2, glheight,0);
    
29. 
    
30. qglEnd();
    

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