Given the parameters to gluPickMatrix
void gluPickMatrix( GLdouble x, GLdouble y, GLdouble delX, GLdouble delY, GLint *viewport )
does anyone know what the pick matrix actually looks like? I’m implementing a picking system using FBOs and since I don’t want to allocate an offscreen buffer as big as the whole window and care for resizing issues, I need a way to manually restrict rendering to the pixel that’s located under the mouse pointer.
Any help is greatly appreciated.