FGFS-4.1/OpenSceneGraph
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Replaced GL_QUADS and GL_QUAD_STRIP usage with indexed GL_TRIANGLES

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Robert Osfield 2017-03-22 09:43:19 +00:00
parent 429aef3b08
commit 48aa852f42
1 changed files with 47 additions and 1 deletions
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48
src/osg/Shape.cpp
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@ -243,7 +243,53 @@ void BuildShapeGeometryVisitor::End()
{
if (_start_index>=_vertices->size()) return;
_geometry->addPrimitiveSet(new DrawArrays(_mode, _start_index, _vertices->size()-_start_index));
if (_mode==GL_QUADS)
{
osg::ref_ptr<osg::DrawElementsUShort> primitives = new osg::DrawElementsUShort(GL_TRIANGLES);
_geometry->addPrimitiveSet(primitives.get());
for(unsigned int i=_start_index; i<_vertices->size(); i+=4)
{
unsigned int p0 = i;
unsigned int p1 = i+1;
unsigned int p2 = i+2;
unsigned int p3 = i+3;
primitives->push_back(p0);
primitives->push_back(p3);
primitives->push_back(p1);
primitives->push_back(p1);
primitives->push_back(p3);
primitives->push_back(p2);
}
}
else if (_mode==GL_QUAD_STRIP)
{
osg::ref_ptr<osg::DrawElementsUShort> primitives = new osg::DrawElementsUShort(GL_TRIANGLES);
_geometry->addPrimitiveSet(primitives.get());
for(unsigned int i=_start_index; i<_vertices->size()-2; i+=2)
{
unsigned int p0 = i;
unsigned int p1 = i+1;
unsigned int p2 = i+2;
unsigned int p3 = i+3;
primitives->push_back(p0);
primitives->push_back(p2);
primitives->push_back(p1);
primitives->push_back(p1);
primitives->push_back(p2);
primitives->push_back(p3);
}
}
else
{
_geometry->addPrimitiveSet(new DrawArrays(_mode, _start_index, _vertices->size()-_start_index));
}
for(unsigned int i=_start_index; i<_vertices->size(); ++i)
{