maincontinuationtest.html

Delaunay三角形的网格剖分程序

<TITLE>COG 2.1: 3D continuation of 2D grids</TITLE>

<H1>3D continuation of 2D grids</H1>

 <P>There are some possibilities to modify grids outside the general
cogenerator concept.  One of them is a 3D continuation of a given 2D
grid.
 <P>Input is a 2D grid created otherwise (here a 2D unit square with
two triangles):

<PRE>
#include "<A HREF="coglib.hxx">cog/coglib.hxx</A>"
int main()
{
  cogenOctree gen = new CogenOctree();
  gen-&gt;setBorder(0.0,1.0, 0.0,1.0);
  wzgrid grid2D = (*gen)();
</PRE>

 <P>Now, we can create a 3D tetrahedral grid by continuation in
z-direction.  Every triangle gives a prism subdivided into three
tetrahedra.  There may be several layers.  In our case, we have two
layers:

<PRE>
  wzFloat dz = 0.4;
  wzIndex number_of_layers = 2;
  wzgrid grid = wzGridContinuation3D(grid2D, dz, number_of_layers);
</PRE>

 <P>which gives the following grid:

 <P><IMG SRC="continuationtest.gif">

<PRE>
  grid->write("test.sg");
}
</PRE>