I have a scene composed of objects drawn with the primitive glVertex and
I've tried to cut away a part of this scene using the example explained
in the book "OpenGL SuperBible" at page 484. It uses
"glDrawBuffer(GL_NONE)" and "glDrawBuffer(GL_BACK)" and between it
defines a plane that will move along the Z axis.
When I try this on my scene, all the objects that conpose this scene are
prolonged along the Z axis and new planes are created. And all the
transformations (scaling, rotation, translation) are no longer possible.
What's wrong with this way of cutting away parts of a scene ? Is there
another solution that will work ? Thanks for the persons who can help