cogelevationtest.html

有限元学习研究用源代码(老外的),供科研人员参考

<TITLE>COG 1.0 - cogelevation.hxx</TITLE>
<H1>Test Example for Elevation Map</H1>
<PRE>
#include "cogelevation.hxx"
#include "cog1d.hxx"
</PRE>

 <P>We use here an elevation map - the ppm-file <A
HREF="test/elevation.ppm">test/elevation.ppm</A>. In this file, the color
encodes a short integer which defines the elevation of the grand
canyon in meter.

 <P>The class <B>CogeometryElevationMap</B> allows to read this file
and defines the function 

<BLOCKQUOTE>
<B>f(x,y,z) = z - elevation(x,y)</B> 
</BLOCKQUOTE>

appropriately scaled. This function is used to define a geometry using
the scheme similar to <A HREF="cogfunctiontest.html#Function">
CogeometrySimpleFunction</A>. For the 

<PRE>
cogeometry	test_cogeometry()
{cogeometry geom1D; CogeometryElevationMap *map;
 geom1D = new <A HREF="cog1dtest.html">Cogeometry1D</A>(0.0,1.0,5,wzRegion(2));
 map    = new CogeometryElevationMap("cog/elevationinput.ppm",geom1D);
 cogFloat xmin=0,xmax=1,ymin=0,ymax=1;
 cogFloat hmin= 700, hmax=4000;         // boundaries for elevation in meter
 map-&gt;setOrigin(xmin,ymin,hmin);
 map-&gt;setSize(xmax-xmin,ymax-ymin,hmax-hmin);
 return map;
}
</PRE>