Realtime visualization of implicit objects with contact control

This article presents an extension of classical marching cubes for implicit objects associated with blending control. In the framework of classical blend graph[Guy and Wyvill 1995], a technique for handling blending is presented, based on mostly boolean operations, and hence allowing efficient implementation. What is more, the resulting tesselation is topologically closer to the theoretical topology of the mathematical object considered than classical marching cubes tesselations. We also propose an optimization, that we call partial time stamping, that significantly diminishes the amount of redundant field values evaluation during marching cubes tesselation, and has the advantage of being compatible with blending control. This technique can be seen as the extension of an optimization technique described in [Triquet et al. 2001], that was not designed for blending control. Our technique is finally compared to classical marching cubes implementations, as a reference. In this final section it is shown that our technique permits high performance visualization of implicits objects combined with blending control.