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[titan99 <>]

Sebastien Loriot (GeometryFactory) wrote:
> 
> Can you post the code used to measure these times?
> 
> 
> S.
> 
> 


Yes, here's the code

void TerrainGrid::BuildPolyhedron()
{
        BuildTerrainPolyhedron<HalfedgeDS> builder;
        builder.vertices = &vertices;
        builder.triangleIndexs = &triangleIndexs;
        builder.progBuildPolyh = &progBuildPolyh;
        
        polyhedron.delegate(builder);
        progDestrPolyh.Initiate(1);  //Measuring begins (the Object 
progDestrPolyh
uses QueryPerformanceCounter from Windows-API)  
            polyhedron.clear();
        progDestrPolyh.StepProgress(); //Measuring stops}

template <class HDS> void BuildTerrainPolyhedron<HDS>::operator()(HDS& hds)
{
        size_t facetsSize = triangleIndexs->size() / 3;
        progBuildPolyh->Initiate(vertices->size() + facetsSize + 1); 
//Measuring
begins (the Object progBuildPolyh uses QueryPerformanceCounter from
Windows-API)

        CGAL::Polyhedron_incremental_builder_3<HDS> builder(hds, false);
        
        builder.begin_surface(vertices->size(), facetsSize, facetsSize * 3);
        
        for(size_t i = 0; i < vertices->size(); ++i)
        {
                builder.add_vertex(Point3(vertices->at(i).x, 
vertices->at(i).y,
vertices->at(i).z));
                progBuildPolyh->StepProgress();
        }

        size_t vertexIndex = 0;
        for(size_t i = 0; i < facetsSize; ++i)
        {
                builder.begin_facet();
                builder.add_vertex_to_facet(triangleIndexs->at(vertexIndex));
                ++vertexIndex;
                builder.add_vertex_to_facet(triangleIndexs->at(vertexIndex));
                ++vertexIndex;
                builder.add_vertex_to_facet(triangleIndexs->at(vertexIndex));
                ++vertexIndex;
                builder.end_facet();
                progBuildPolyh->StepProgress();
        }
        builder.end_surface();
        progBuildPolyh->StepProgress(); //Measuring stops
}
}

http://cgal-discuss.949826.n4.nabble.com/file/n3253686/screen_terrain_gen_0.jpg
 
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