“锯齿”平滑技术在凝固模拟中的应用

Application of Smoothing Technology to Alias-smoothing in Solidification Simulation

在基于有限差分法的凝固模拟技术中,由于六面体网格拓扑形状的特殊性,导致在进行后处理可视化时图像常呈现出大量的“锯齿”。在对计算数据进行预处理的基础上,通过对位于表面的六面体网格进行“倒角”平滑处理,提取出以三角形面片表示的表面网格轮廓后绘制轮廓,得到了少“锯齿”,甚至无“锯齿”的图像,解决了凝固模拟中图像的“锯齿”化问题,取得了准确、即时和美观的可视化效果。

Amounts of alias during visualization in post-processing occur due to the special topology of hexahedral grid based on the finite difference method. Based on pre-processing the calculated data, through chamfering surface grids and extracting the smooth contour, represented by triangle primitive, of surface grid to render the contour, the high quality graphs with spars alias or no alias can be obtained, having solved the alias problems during visualization in solidification simulation. Results show that accurate, real-time and realistic visualization effects can be realized by the method.