FGFS-4.1/OpenSceneGraph
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Added a check for the maximum index values of primitives, and then use this

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to select whether to use UByte,UShort or UInt versions of osg::DrawElements.
This commit is contained in:
Robert Osfield
2003-09-16 19:56:00 +00:00
parent cec0b35cd4
commit 96388cee67
1 changed files with 24 additions and 5 deletions
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29
src/osgUtil/TriStripVisitor.cpp
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@@ -16,6 +16,7 @@
#include <osgUtil/TriStripVisitor>
#include <stdio.h>
#include <algorithm>
#include "TriStrip_tri_stripper.h"
@@ -141,11 +142,29 @@ void TriStripVisitor::stripify(Geometry& geom)
pitr!=outPrimitives.end();
++pitr)
{
osg::DrawElementsUShort* elements = new osg::DrawElementsUShort(pitr->m_Type);
elements->reserve(pitr->m_Indices.size());
std::copy(pitr->m_Indices.begin(),pitr->m_Indices.end(),std::back_inserter(*elements));
//elements->insert(elements->end(),);
new_primitives.push_back(elements);
unsigned int maxValue = *(std::max_element(pitr->m_Indices.begin(),pitr->m_Indices.end()));
if (maxValue<256)
{
osg::DrawElementsUByte* elements = new osg::DrawElementsUByte(pitr->m_Type);
elements->reserve(pitr->m_Indices.size());
std::copy(pitr->m_Indices.begin(),pitr->m_Indices.end(),std::back_inserter(*elements));
new_primitives.push_back(elements);
}
else if (maxValue<65536)
{
osg::DrawElementsUShort* elements = new osg::DrawElementsUShort(pitr->m_Type);
elements->reserve(pitr->m_Indices.size());
std::copy(pitr->m_Indices.begin(),pitr->m_Indices.end(),std::back_inserter(*elements));
new_primitives.push_back(elements);
}
else
{
osg::DrawElementsUInt* elements = new osg::DrawElementsUInt(pitr->m_Type);
elements->reserve(pitr->m_Indices.size());
std::copy(pitr->m_Indices.begin(),pitr->m_Indices.end(),std::back_inserter(*elements));
new_primitives.push_back(elements);
}
}
geom.setPrimitiveSetList(new_primitives);