Can someone plz tell me what actually gluLookAt tell us ?
and glFrustum ?
I ve written a prog to display a wirecube… but am unable to figure out the effects of these two functions…
Im confused over the orientation of Z-axis and object and eye coordinates etc… thanks in advance…
thanks for help … ZbuffeR 
ll check out that…
gluLookAt changes modeview matrix
glFrustum changes projection matrix