Rapid Cross-Section Visualization Method for Large-Scale CAD Model with
Luo Yuetong1,2), Zhou Jun1,2), Gan Quan2), Wu Bin2), Song Jing2), and He Peng2)*
1) (Visualization & Cooperative Computing, Hefei University of Technology, Hefei 230009) 2) (Key Laboratory of Neutronics and Radiation Safety, Institute of Nuclear Energy Technology, Chinese Academy of Sciences, Hefei 230031)
Cross-section visualization is an effective way to reveal interior structure of complex CAD model. The popular facet intersection based cross-section visualization method is of dense computation, it can’t offer interactive cross-section visualization for large scale CAD model. The paper presents a hybrid cross- section visualization method combining facet intersection and 3D texture for large-scale repeated-structure CAD model, which is consisted of small number of basic objects. All basic objects are converted into high-resolution 3D texture during pre-processing stage; select the visual object by the visual clipping algorithm; and during the stage, determine cross-section visualization method for each object by evaluating its projection on screen. The presented algorithm has been researched on the SuperMC/MCAM (multi-physics coupling analysis modeling program) developed by the FDS team of Chinese academy of science. Both HM (Hoogenboom Martin) reactor core model and ADS (accelerator driven sub-critical system) reactor model have been used for testing. The result demonstrates that the presented method can achieve similar rendering quality as facet-intersection based method, and is fast enough for interaction.
section visualization; repeated structures; 3D texture mapping