[B1 CAD/CAM/PDM/CIM] Stencil Buffer를 이용한 형상의 복셀화

We propose a hardware accelerated voxelization method for various 3D object models such as surface models, solid models, and volumetric CSG models. The algorithm utilizes the stencil buffer that is one of modern OpenGL graphics hardware features. The stencil buffer is originally used to restrict drawing to certain portions of the screen. The volumetric representations of given 3D objects are constructed slice-by-slice. For each slice, the algorithm restricts the drawing areas with the inner region of 3D objects using the stencil buffer, and generates slices of the volumetric representation for target objects. As a result, we can provide volume graphics support for various engineering applications such as multi-axis machining simulation, collision detection and finite element analysis.