Hello - can anyone help? In some of my programs, if I use I change textures quickly something like this:
glTexture(....); //load texture A
glBegin(GL_QUADS)......glEnd((); //draw quad 1
glTexture(....); //load texture B
glBegin(GL_QUADS).....glEnd(); //draw quad 2
The second texture does not load or lines appear on the second texture especially if the GL window is nearly full-screen. Sometimes I can avoid this by using very small textures such as 32x32 or putting all my textures on a single bitmap and using texture co-ordinates to select part of the bitmap to use but I don't necessarily always want to do this.
Has anyone found similar problems
?
P.S. Is there a standard way to use textures all from one bitmap? Because if I change the size of the bitmap to put more textures onto it I don't want to have to change all my code
ALSO: In openGL you have to swith from RGB to BGR which either means changing your bitmap before hand or using a for/next loop in the program such as:
for(z=0;z<256*256*3;z+=3){
c=data[z];
data[z]=data[z+2];
data[z+2]=c;
}
Usually, if I have to change it in the program this for/next loop is fast enough - but surely there must be a simpler way? How could openGL not support RGB format? Strange...
[edited by - paulbird on March 26, 2003 9:06:45 AM]
