maintest.html

有限元学习研究用源代码(老外的),供科研人员参考

<TITLE>COG 2.0: Startup File</TITLE>

<A HREF="mainoctreetest.html">next</A>

<H1>COG 2.0: Startup File</H1>

 <P>Let's start with the simplest 3D grid example - a cube,
consisting of six tetrahedra.  We need, of course, an include file:

<PRE>
#include "<A HREF="coglib.hxx">cog/coglib.hxx</A>"
int main()
{
</PRE>

 <P>We also need a grid generator. For the first example, this grid
generator is of the class <B>CogenOctree</B>.  The related pointer type
is <B>cogenOctree</B> (don't use CogenOctree* for a pointer!!!).

<PRE>
  cogenOctree gen = new CogenOctree();
</PRE>

 <P>Then, we add a cube, with some region number, and boundaries:

<PRE>
  gen-&gt;addBox(wzRegion(1), 0.0,1.0, 0.0,1.0, 0.0,1.0);
</PRE>

 <P>That's all we need for our first 3D test example. Now, we can call
the grid generator:

<PRE>
  wzgrid grid = (*gen)();
</PRE>

 <P>Now we can use the grid, for example, write it into a file:

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

<H2>How to test these test examples</H2>

 <P>All these test examples (files with filenames of type
"<B>main*test.html</B>") contain valid test code.  This code may be
automatically extracted using the perl scripts <B>run</B> and
<B>use</B>.

 <P><B>&gt; run main start</B>

 <P>tests this example. You can do it in two steps:

 <P><B>&gt; use main start</B>
 <BR><B>&gt; run</B>

 <P>The command <B>use main xyz</B> extracts the code from
mainxyztest.html into <B>maintest.cxx</B>. The <B>run</B> command
compiles, links and runs the program <B>maintest.cxx</B>.

 <P>Now, in our tutorial we continue with
 <A HREF="mainoctreetest.html">other possibilities of the class
CogenOctree</A>.