基于半规则纹理和三角块映射的表面流场模拟

Simulation of Surface Flow Based on Near-regular Texture and Triangular-patch Mapping

针对基于点噪声的流场可视化不够形象的缺点,提出一种更直观的基于半规则纹理和三角块映射的三维表面流场可视化方法。首先,建立模型的三角化网格,并以三角形作为基本单元,以三角形的重心场作为三角形的流场,结合具有方向性的半规则纹理进行纹理映射。同时,建立最大样本集和最优样本集加速场流动过程中纹理重新映射造成的时间损耗。最后,说明了添加矢量点后,三角块流场的合成方式。实验表明,该方法可以获得较好的可视化效果。

To enhance the visual effect of the traditional spot noise method, a much more intuitionistlc method was proposed to use near-regular texture and triangular-patch texture mapping to animate the 3D flow visualization for curved surfaces. First of all, the triangular-patch model was constructed. On the basis of the triangular unit, the flow filed of the Gravity Center of a triangle was adopted as the field of the triangular-patch. Then the triangular-patch made a texture mapping with the directional information of the near regular texture. At the same time, the max sample set and the best sample set were introduced to alleviate the time loss of the texture re-mapping on the movement of the flow field. At last, the flow synthesis method with the additional vector point was illustrated. The experimental results show that this algorithm can achieve better effect than the traditional ones.