FGFS-4.1/OpenSceneGraph
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Added osgUtil::Tesselator for SHapeType Polygon to handle concave polygons.

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This commit is contained in:
Don BURNS
2006-08-22 19:10:48 +00:00
parent 8aceb4eec6
commit 1fa331034c
1 changed files with 12 additions and 0 deletions
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12
src/osgPlugins/ESRIShape/ESRIShapeParser.cpp
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@@ -1,6 +1,7 @@
#include <fcntl.h>
#include <osg/Geometry>
#include <osg/Notify>
#include <osgUtil/Tesselator>
#if defined(_MSC_VER)
#include <io.h>
@@ -314,6 +315,8 @@ void ESRIShapeParser::_process( const std::vector<ESRIShape::Polygon> &polys )
osg::ref_ptr<osg::Geometry> geometry = new osg::Geometry;
geometry->setVertexArray(coords.get());
for( i = 0; i < p->numParts; i++ )
{
int index = p->parts[i];
@@ -324,6 +327,15 @@ void ESRIShapeParser::_process( const std::vector<ESRIShape::Polygon> &polys )
geometry->addPrimitiveSet(
new osg::DrawArrays(osg::PrimitiveSet::POLYGON, index, len));
}
// Use osgUtil::Tesselator to handle concave polygons
osg::ref_ptr<osgUtil::Tesselator> tscx=new osgUtil::Tesselator;
tscx->setTesselationType(osgUtil::Tesselator::TESS_TYPE_GEOMETRY);
tscx->setBoundaryOnly(false);
tscx->setWindingType( osgUtil::Tesselator::TESS_WINDING_ODD);
tscx->retesselatePolygons(*(geometry.get()));
_geode->addDrawable( geometry.get() );
}
}