2a84719f4a
git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14770 16af8721-9629-0410-8352-f15c8da7e697
129 lines
4.3 KiB
C++
129 lines
4.3 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) Cedric Pinson
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*
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* This application is open source and may be redistributed and/or modified
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* freely and without restriction, both in commercial and non commercial
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* applications, as long as this copyright notice is maintained.
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*
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* This application is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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*/
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#include <osg/Geometry>
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#include <osg/PrimitiveSet>
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#include "UnIndexMeshVisitor"
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#include "GeometryArray"
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#include "PrimitiveIndexors"
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typedef std::vector<unsigned int> IndexList;
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// this help works only for indexed primitive to unindex it
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void UnIndexMeshVisitor::apply(osg::Geometry& geom)
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{
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// no point optimizing if we don't have enough vertices.
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if (!geom.getVertexArray()) return;
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// check for the existence of surface primitives
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unsigned int numIndexedPrimitives = 0;
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osg::Geometry::PrimitiveSetList& primitives = geom.getPrimitiveSetList();
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osg::Geometry::PrimitiveSetList::iterator itr;
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for(itr=primitives.begin();
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itr!=primitives.end();
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++itr)
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{
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osg::PrimitiveSet::Type type = (*itr)->getType();
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if ((type == osg::PrimitiveSet::DrawElementsUBytePrimitiveType
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|| type == osg::PrimitiveSet::DrawElementsUShortPrimitiveType
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|| type == osg::PrimitiveSet::DrawElementsUIntPrimitiveType))
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numIndexedPrimitives++;
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}
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// no polygons or no indexed primitive, nothing to do
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if (!numIndexedPrimitives) {
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return;
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}
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// we dont manage lines
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GeometryArrayList arraySrc(geom);
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GeometryArrayList arrayList = arraySrc.cloneType();
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osg::Geometry::PrimitiveSetList newPrimitives;
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for(itr=primitives.begin();
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itr!=primitives.end();
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++itr)
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{
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osg::PrimitiveSet::Mode mode = (osg::PrimitiveSet::Mode)(*itr)->getMode();
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switch(mode) {
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// manage triangles
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case(osg::PrimitiveSet::TRIANGLES):
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case(osg::PrimitiveSet::TRIANGLE_STRIP):
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case(osg::PrimitiveSet::TRIANGLE_FAN):
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case(osg::PrimitiveSet::QUADS):
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case(osg::PrimitiveSet::QUAD_STRIP):
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case(osg::PrimitiveSet::POLYGON):
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{
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// for each geometry list indexes of vertexes
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// to makes triangles
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TriangleIndexor triangleIndexList;
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(*itr)->accept(triangleIndexList);
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unsigned int index = arrayList.size();
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// now copy each vertex to new array, like a draw array
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arraySrc.append(triangleIndexList._indices, arrayList);
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newPrimitives.push_back(new osg::DrawArrays(osg::PrimitiveSet::TRIANGLES,
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index,
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triangleIndexList._indices.size()));
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}
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break;
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// manage lines
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case(osg::PrimitiveSet::LINES):
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case(osg::PrimitiveSet::LINE_STRIP):
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case(osg::PrimitiveSet::LINE_LOOP):
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{
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EdgeIndexor edgesIndexList;
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(*itr)->accept(edgesIndexList);
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unsigned int index = arrayList.size();
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// now copy each vertex to new array, like a draw array
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arraySrc.append(edgesIndexList._indices, arrayList);
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newPrimitives.push_back(new osg::DrawArrays(osg::PrimitiveSet::LINES,
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index,
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edgesIndexList._indices.size()));
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}
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break;
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case(osg::PrimitiveSet::POINTS):
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{
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PointIndexor pointsIndexList;
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(*itr)->accept(pointsIndexList);
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unsigned int index = arrayList.size();
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// now copy each vertex to new array, like a draw array
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arraySrc.append(pointsIndexList._indices, arrayList);
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newPrimitives.push_back(new osg::DrawArrays(osg::PrimitiveSet::POINTS,
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index,
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pointsIndexList._indices.size()));
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}
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break;
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default:
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break;
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}
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}
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arrayList.setToGeometry(geom);
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geom.setPrimitiveSetList(newPrimitives);
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setProcessed(&geom);
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}
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