{\rtf1\ansi\ansicpg1253\deff0{\fonttbl{\f0\fnil\fcharset0 Arial;}} {\colortbl ;\red163\green21\blue21;} {\*\generator Msftedit 5.41.21.2509;}\viewkind4\uc1\pard\cf1\lang1033\b\fs28 Introduction\b0\fs22\par \par This sample demonstrates the use of the stencil buffer for rendering constructive solid geometry (or CSG in short).\par \par CSG allows the construction of complex models by combining simple shapes via boolean operators (union, difference, intersection and more).\par \par \b\fs28 Controls\par \b0\fs22\par Press Esc or click the close button to exit.\par Press Space to toggle wireframe mode on/off.\par Move the mouse to rotate the camera.\par Scroll the mouse wheel to zoom in/out.\par }