生成contours,基于四边形的网格生成程序-To generate contours, based on the quadrilateral mesh generation procedure

四边形网格的生成算法，可以看看，我认为不错！-Quadrilateral mesh generation algorithm, you can look good in my opinion!

等值线生成为了生成四边形网格的等值线,通过引入虚节点将四边形网格剖分为四个三角形实现对四边形网格上等值线的生成方法-Isogram generate quadrilateral mesh in order to generate the contour lines, through the introduction of virtual nodes to quadrilateral mesh generation for the realization of the four triangles

四边形网格的生成算法，可以看看看，我认为不错！可直接使用。 -Quadrilateral mesh generation algorithm, you can look at it, I consider good! Can be used directly.

基于输入的三角形描述的多边形，生成四边形网格(a C++ program for generating convex quadrilateral meshes of arbitrary polygonal domains. CQMesh takes as input a triangulation of a polygonal domain, and then converts this triangulation into a convex quadrangulation of the sam