hi :D

for picking an object in my game i use the simple opengl color picking method.

for now it only work on pc , and all the example founded in internet refer only to little-endian machines.


first i draw a polygon with this code :
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int nIndex ;
nIndex = 1000;
glColor3ub ( nIndex % 256, (nIndex>>8) % 256, (nIndex>>16) % 256);
glBegin(GL_QUADS);
glVertex3f( -0.5f, -0.5f, +0.5f);
glVertex3f( +0.5f, -0.5f, +0.5f);
glVertex3f( +0.5f, +0.5f, +0.5f);
glVertex3f( -0.5f, +0.5f, +0.5f);
glEnd();
----------------------------------------------------

my picking routine is this :
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unsigned char *pRGB;

pRGB = malloc(sizeof(unsigned char)*4);

glReadPixels( mousex, viewport[3]-mousey, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, pRGB);

ColorNumber = (pRGB[ 0 ]) + (pRGB[ 1 ]*256) + (pRGB[ 2 ]*256*256);
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this routine work only on Pc, on the peg the number returned isn't 1000.

so there is involved the little/big-endian problem.

i can't find a solution to obtain the same color number i obtain on the Pc (in this example 1000)

and no i don't want to study the ray-plane intersection

anyone want to help ?? please :D