52270c9656
retessellatePolygons was applying the winding and boundary option. Moved the gluTessProperty calls into beginTessellation(). There's a comment typo fix, removing an unused VertexPointList typedef, and allocates one _tobj instead of one per tesellation. Protections were added to check that _tobj was allocated in the few remaining places it wasn't being checked. --- On a side note, I would like to avoid the 'new Vec3d' in Tessellator::addVertex for each call to gluTessVertex(tess, location, data). The RedBook leaves it ambiguous if the location pointer must remain valid after gluTessVertex or not. http://www.opengl.org/sdk/docs/man/xhtml/gluTessVertex.xml says that changing location is not safe, so being conservative, I'll leave it as is, even though the Mesa GLU library copies the data not the pointer, so it is currently safe."
787 lines
29 KiB
C++
787 lines
29 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library 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. See the
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* OpenSceneGraph Public License for more details.
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*/
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#include <osg/GL>
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#include <osg/GLU>
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#include <osg/Notify>
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#include <osg/io_utils>
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#include <osgUtil/Tessellator>
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using namespace osg;
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using namespace osgUtil;
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Tessellator::Tessellator() :
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_wtype(TESS_WINDING_ODD),
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_ttype(TESS_TYPE_POLYGONS),
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_boundaryOnly(false), _numberVerts(0)
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{
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_tobj = gluNewTess();
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if (_tobj)
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{
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gluTessCallback(_tobj, GLU_TESS_VERTEX_DATA, (GLU_TESS_CALLBACK) vertexCallback);
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gluTessCallback(_tobj, GLU_TESS_BEGIN_DATA, (GLU_TESS_CALLBACK) beginCallback);
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gluTessCallback(_tobj, GLU_TESS_END_DATA, (GLU_TESS_CALLBACK) endCallback);
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gluTessCallback(_tobj, GLU_TESS_COMBINE_DATA,(GLU_TESS_CALLBACK) combineCallback);
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gluTessCallback(_tobj, GLU_TESS_ERROR_DATA, (GLU_TESS_CALLBACK) errorCallback);
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}
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_errorCode = 0;
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_index=0;
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}
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Tessellator::~Tessellator()
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{
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reset();
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if (_tobj)
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{
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gluDeleteTess(_tobj);
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}
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}
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void Tessellator::beginTessellation()
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{
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reset();
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if (_tobj)
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{
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gluTessProperty(_tobj, GLU_TESS_WINDING_RULE, _wtype);
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gluTessProperty(_tobj, GLU_TESS_BOUNDARY_ONLY, _boundaryOnly);
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if (tessNormal.length()>0.0) gluTessNormal(_tobj, tessNormal.x(), tessNormal.y(), tessNormal.z());
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gluTessBeginPolygon(_tobj,this);
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}
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}
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void Tessellator::beginContour()
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{
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if (_tobj)
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{
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gluTessBeginContour(_tobj);
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}
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}
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void Tessellator::addVertex(osg::Vec3* vertex)
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{
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if (_tobj)
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{
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if (vertex && vertex->valid())
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{
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Vec3d* data = new Vec3d;
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_coordData.push_back(data);
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(*data)._v[0]=(*vertex)[0];
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(*data)._v[1]=(*vertex)[1];
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(*data)._v[2]=(*vertex)[2];
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gluTessVertex(_tobj,data->_v,vertex);
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}
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else
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{
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OSG_INFO<<"Tessellator::addVertex("<<*vertex<<") detected NaN, ignoring vertex."<<std::endl;
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}
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}
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}
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void Tessellator::endContour()
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{
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if (_tobj)
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{
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gluTessEndContour(_tobj);
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}
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}
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void Tessellator::endTessellation()
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{
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if (_tobj)
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{
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gluTessEndPolygon(_tobj);
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if (_errorCode!=0)
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{
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const GLubyte *estring = gluErrorString((GLenum)_errorCode);
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OSG_WARN<<"Tessellation Error: "<<estring<< std::endl;
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}
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}
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}
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void Tessellator::reset()
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{
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for (Vec3dList::iterator i = _coordData.begin(); i != _coordData.end(); ++i)
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{
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delete (*i);
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}
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// We need to also free the vertex list as well otherwise we are leaking...
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for (NewVertexList::iterator j = _newVertexList.begin(); j != _newVertexList.end(); ++j)
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{
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NewVertex& newVertex = (*j);
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delete newVertex._vpos;
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newVertex._vpos = NULL;
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}
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_coordData.clear();
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_newVertexList.clear();
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_primList.clear();
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_errorCode = 0;
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}
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class InsertNewVertices : public osg::ArrayVisitor
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{
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public:
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float _f1,_f2,_f3,_f4;
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unsigned int _i1,_i2,_i3,_i4;
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InsertNewVertices(float f1,unsigned int i1,
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float f2,unsigned int i2,
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float f3,unsigned int i3,
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float f4,unsigned int i4):
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_f1(f1),_f2(f2),_f3(f3),_f4(f4),
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_i1(i1),_i2(i2),_i3(i3),_i4(i4){}
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template <class ARRAY,class TYPE>
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void apply_imp(ARRAY& array,TYPE initialValue)
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{
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TYPE val = initialValue;
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if (_f1) val += static_cast<TYPE>(array[_i1] * _f1);
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if (_f2) val += static_cast<TYPE>(array[_i2] * _f2);
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if (_f3) val += static_cast<TYPE>(array[_i3] * _f3);
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if (_f4) val += static_cast<TYPE>(array[_i4] * _f4);
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array.push_back(val);
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}
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virtual void apply(osg::ByteArray& ba) { apply_imp(ba,GLbyte(0)); }
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virtual void apply(osg::ShortArray& ba) { apply_imp(ba,GLshort(0)); }
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virtual void apply(osg::IntArray& ba) { apply_imp(ba,GLint(0)); }
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virtual void apply(osg::UByteArray& ba) { apply_imp(ba,GLubyte(0)); }
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virtual void apply(osg::UShortArray& ba) { apply_imp(ba,GLushort(0)); }
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virtual void apply(osg::UIntArray& ba) { apply_imp(ba,GLuint(0)); }
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virtual void apply(osg::Vec4ubArray& ba) { apply_imp(ba,Vec4ub()); }
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virtual void apply(osg::FloatArray& ba) { apply_imp(ba,float(0)); }
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virtual void apply(osg::Vec2Array& ba) { apply_imp(ba,Vec2()); }
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virtual void apply(osg::Vec3Array& ba) { apply_imp(ba,Vec3()); }
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virtual void apply(osg::Vec4Array& ba) { apply_imp(ba,Vec4()); }
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};
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void Tessellator::retessellatePolygons(osg::Geometry &geom)
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{
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// turn the contour list into primitives, a little like Tessellator does but more generally
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osg::Vec3Array* vertices = dynamic_cast<osg::Vec3Array*>(geom.getVertexArray());
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if (!vertices || vertices->empty() || geom.getPrimitiveSetList().empty()) return;
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// we currently don't handle geometry which use indices...
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if (geom.getVertexIndices() ||
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geom.getNormalIndices() ||
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geom.getColorIndices() ||
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geom.getSecondaryColorIndices() ||
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geom.getFogCoordIndices()) return;
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// not even text coord indices don't handle geometry which use indices...
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for(unsigned int unit=0;unit<geom.getNumTexCoordArrays();++unit)
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{
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if (geom.getTexCoordIndices(unit)) return;
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}
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if (_ttype==TESS_TYPE_POLYGONS || _ttype==TESS_TYPE_DRAWABLE) _numberVerts=0; // 09.04.04 GWM reset Tessellator
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// the reset is needed by the flt loader which reuses a Tessellator for triangulating polygons.
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// as such it might be reset by other loaders/developers in future.
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_index=0; // reset the counter for indexed vertices
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_extraPrimitives = 0;
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if (!_numberVerts) {
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_numberVerts=geom.getVertexArray()->getNumElements();
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// save the contours for complex (winding rule) tessellations
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_Contours=geom.getPrimitiveSetList();
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}
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// now cut out vertex attributes added on any previous tessellation
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reduceArray(geom.getVertexArray(), _numberVerts);
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reduceArray(geom.getColorArray(), _numberVerts);
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reduceArray(geom.getNormalArray(), _numberVerts);
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reduceArray(geom.getFogCoordArray(), _numberVerts);
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for(unsigned int unit1=0;unit1<geom.getNumTexCoordArrays();++unit1)
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{
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reduceArray(geom.getTexCoordArray(unit1), _numberVerts);
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}
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// remove the existing primitives.
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unsigned int nprimsetoriginal= geom.getNumPrimitiveSets();
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if (nprimsetoriginal) geom.removePrimitiveSet(0, nprimsetoriginal);
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// the main difference from osgUtil::Tessellator for Geometry sets of multiple contours is that the begin/end tessellation
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// occurs around the whole set of contours.
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if (_ttype==TESS_TYPE_GEOMETRY) {
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beginTessellation();
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}
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// process all the contours into the Tessellator
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int noContours = _Contours.size();
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int currentPrimitive = 0;
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for(int primNo=0;primNo<noContours;++primNo)
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{
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osg::ref_ptr<osg::PrimitiveSet> primitive = _Contours[primNo].get();
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if (_ttype==TESS_TYPE_POLYGONS || _ttype==TESS_TYPE_DRAWABLE)
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{ // this recovers the 'old' tessellation which just retessellates single polygons.
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if (primitive->getMode()==osg::PrimitiveSet::POLYGON || _ttype==TESS_TYPE_DRAWABLE)
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{
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if (primitive->getType()==osg::PrimitiveSet::DrawArrayLengthsPrimitiveType)
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{
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osg::DrawArrayLengths* drawArrayLengths = static_cast<osg::DrawArrayLengths*>(primitive.get());
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unsigned int first = drawArrayLengths->getFirst();
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for(osg::DrawArrayLengths::iterator itr=drawArrayLengths->begin();
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itr!=drawArrayLengths->end();
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++itr)
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{
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beginTessellation();
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unsigned int last = first + *itr;
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addContour(primitive->getMode(),first,last,vertices);
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first = last;
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endTessellation();
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collectTessellation(geom, currentPrimitive);
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currentPrimitive++;
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}
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}
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else
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{
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if (primitive->getNumIndices()>3) { // April 2005 gwm only retessellate "complex" polygons
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beginTessellation();
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addContour(primitive.get(), vertices);
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endTessellation();
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collectTessellation(geom, currentPrimitive);
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currentPrimitive++;
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} else { // April 2005 gwm triangles don't need to be retessellated
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geom.addPrimitiveSet(primitive.get());
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}
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}
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}
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else
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{ // copy the contour primitive as it is not being tessellated
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geom.addPrimitiveSet(primitive.get());
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}
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} else {
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if (primitive->getMode()==osg::PrimitiveSet::POLYGON ||
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primitive->getMode()==osg::PrimitiveSet::QUADS ||
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primitive->getMode()==osg::PrimitiveSet::TRIANGLES ||
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primitive->getMode()==osg::PrimitiveSet::LINE_LOOP ||
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primitive->getMode()==osg::PrimitiveSet::QUAD_STRIP ||
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primitive->getMode()==osg::PrimitiveSet::TRIANGLE_FAN ||
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primitive->getMode()==osg::PrimitiveSet::TRIANGLE_STRIP)
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{
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addContour(primitive.get(), vertices);
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} else { // copy the contour primitive as it is not being tessellated
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// in this case points, lines or line_strip
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geom.addPrimitiveSet(primitive.get());
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}
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}
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}
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if (_ttype==TESS_TYPE_GEOMETRY) {
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endTessellation();
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collectTessellation(geom, 0);
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}
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}
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void Tessellator::addContour(GLenum mode, unsigned int first, unsigned int last, osg::Vec3Array* vertices)
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{
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beginContour();
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unsigned int idx=0;
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unsigned int nperprim=0; // number of vertices per primitive
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if (mode==osg::PrimitiveSet::QUADS) nperprim=4;
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else if (mode==osg::PrimitiveSet::TRIANGLES) nperprim=3;
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unsigned int i;
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switch (mode)
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{
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case osg::PrimitiveSet::QUADS:
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case osg::PrimitiveSet::TRIANGLES:
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case osg::PrimitiveSet::POLYGON:
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case osg::PrimitiveSet::LINE_LOOP:
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case osg::PrimitiveSet::TRIANGLE_FAN:
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{
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for(i=first;i<last;++i, idx++)
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{
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addVertex(&((*vertices)[i]));
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if (nperprim>0 && i<last-1 && idx%nperprim==nperprim-1) {
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endContour();
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beginContour();
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}
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}
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}
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break;
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case osg::PrimitiveSet::QUAD_STRIP:
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{ // always has an even number of vertices
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for(i=first;i<last;i+=2)
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{ // 0,2,4...
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addVertex(&((*vertices)[i]));
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}
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for(i=last-1;i>=first;i-=2)
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{ // ...5,3,1
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addVertex(&((*vertices)[i]));
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}
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}
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break;
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case osg::PrimitiveSet::TRIANGLE_STRIP:
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{
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for( i=first;i<last;i+=2)
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{// 0,2,4,...
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addVertex(&((*vertices)[i]));
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}
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for(i=((last-first)%2)?(last-2):(last-1) ;i>first&& i<last;i-=2)
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{
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addVertex(&((*vertices)[i]));
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}
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}
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break;
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default: // lines, points, line_strip
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{
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for(i=first;i<last;++i, idx++)
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{
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addVertex(&((*vertices)[i]));
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if (nperprim>0 && i<last-1 && idx%nperprim==nperprim-1) {
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endContour();
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beginContour();
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}
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}
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}
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break;
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}
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endContour();
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}
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void Tessellator::addContour(osg::PrimitiveSet* primitive, osg::Vec3Array* vertices)
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{
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// adds a single primitive as a contour.
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unsigned int nperprim=0; // number of vertices per primitive
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if (primitive->getMode()==osg::PrimitiveSet::QUADS) nperprim=4;
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if (primitive->getMode()==osg::PrimitiveSet::TRIANGLES) nperprim=3;
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unsigned int idx=0;
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switch(primitive->getType())
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{
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case(osg::PrimitiveSet::DrawArraysPrimitiveType):
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{
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osg::DrawArrays* drawArray = static_cast<osg::DrawArrays*>(primitive);
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unsigned int first = drawArray->getFirst();
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unsigned int last = first+drawArray->getCount();
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addContour(primitive->getMode(),first,last,vertices);
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break;
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}
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case(osg::PrimitiveSet::DrawElementsUBytePrimitiveType):
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{
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beginContour();
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osg::DrawElementsUByte* drawElements = static_cast<osg::DrawElementsUByte*>(primitive);
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for(osg::DrawElementsUByte::iterator indexItr=drawElements->begin();
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indexItr!=drawElements->end();
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++indexItr, idx++)
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{
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addVertex(&((*vertices)[*indexItr]));
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if (nperprim>0 && indexItr!=drawElements->end() && idx%nperprim==nperprim-1) {
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endContour();
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beginContour();
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}
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}
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endContour();
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break;
|
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}
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case(osg::PrimitiveSet::DrawElementsUShortPrimitiveType):
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{
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beginContour();
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osg::DrawElementsUShort* drawElements = static_cast<osg::DrawElementsUShort*>(primitive);
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for(osg::DrawElementsUShort::iterator indexItr=drawElements->begin();
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indexItr!=drawElements->end();
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++indexItr, idx++)
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{
|
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addVertex(&((*vertices)[*indexItr]));
|
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if (nperprim>0 && indexItr!=drawElements->end() && idx%nperprim==nperprim-1) {
|
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endContour();
|
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beginContour();
|
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}
|
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}
|
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endContour();
|
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break;
|
|
}
|
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case(osg::PrimitiveSet::DrawElementsUIntPrimitiveType):
|
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{
|
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beginContour();
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osg::DrawElementsUInt* drawElements = static_cast<osg::DrawElementsUInt*>(primitive);
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for(osg::DrawElementsUInt::iterator indexItr=drawElements->begin();
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indexItr!=drawElements->end();
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++indexItr, idx++)
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{
|
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addVertex(&((*vertices)[*indexItr]));
|
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if (nperprim>0 && indexItr!=drawElements->end() && idx%nperprim==nperprim-1) {
|
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endContour();
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beginContour();
|
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}
|
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}
|
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endContour();
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break;
|
|
}
|
|
default:
|
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OSG_NOTICE<<"Tessellator::addContour(primitive, vertices) : Primitive type "<<primitive->getType()<<" not handled"<<std::endl;
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break;
|
|
}
|
|
|
|
}
|
|
|
|
void Tessellator::handleNewVertices(osg::Geometry& geom,VertexPtrToIndexMap &vertexPtrToIndexMap)
|
|
{
|
|
if (!_newVertexList.empty())
|
|
{
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|
|
osg::Vec3Array* vertices = dynamic_cast<osg::Vec3Array*>(geom.getVertexArray());
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osg::Vec3Array* normals = NULL;
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if (geom.getNormalBinding()==osg::Geometry::BIND_PER_VERTEX)
|
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{
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normals = dynamic_cast<osg::Vec3Array*>(geom.getNormalArray());
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}
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|
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typedef std::vector<osg::Array*> ArrayList;
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ArrayList arrays;
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|
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if (geom.getColorBinding()==osg::Geometry::BIND_PER_VERTEX)
|
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{
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arrays.push_back(geom.getColorArray());
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}
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|
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if (geom.getSecondaryColorBinding()==osg::Geometry::BIND_PER_VERTEX)
|
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{
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arrays.push_back(geom.getSecondaryColorArray());
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}
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|
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if (geom.getFogCoordBinding()==osg::Geometry::BIND_PER_VERTEX)
|
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{
|
|
arrays.push_back(geom.getFogCoordArray());
|
|
}
|
|
|
|
osg::Geometry::ArrayDataList& tcal = geom.getTexCoordArrayList();
|
|
for(osg::Geometry::ArrayDataList::iterator tcalItr=tcal.begin();
|
|
tcalItr!=tcal.end();
|
|
++tcalItr)
|
|
{
|
|
if (tcalItr->array.valid())
|
|
{
|
|
arrays.push_back(tcalItr->array.get());
|
|
}
|
|
}
|
|
|
|
// now add any new vertices that are required.
|
|
for(NewVertexList::iterator itr=_newVertexList.begin();
|
|
itr!=_newVertexList.end();
|
|
++itr)
|
|
{
|
|
NewVertex& newVertex = (*itr);
|
|
osg::Vec3* vertex = newVertex._vpos;
|
|
|
|
// assign vertex.
|
|
vertexPtrToIndexMap[vertex]=vertices->size();
|
|
vertices->push_back(*vertex);
|
|
|
|
// assign normals
|
|
if (normals)
|
|
{
|
|
osg::Vec3 norm(0.0f,0.0f,0.0f);
|
|
if (newVertex._v1) norm += (*normals)[vertexPtrToIndexMap[newVertex._v1]] * newVertex._f1;
|
|
if (newVertex._v2) norm += (*normals)[vertexPtrToIndexMap[newVertex._v2]] * newVertex._f2;
|
|
if (newVertex._v3) norm += (*normals)[vertexPtrToIndexMap[newVertex._v3]] * newVertex._f3;
|
|
if (newVertex._v4) norm += (*normals)[vertexPtrToIndexMap[newVertex._v4]] * newVertex._f4;
|
|
norm.normalize();
|
|
normals->push_back(norm);
|
|
}
|
|
|
|
if (!arrays.empty())
|
|
{
|
|
InsertNewVertices inv(newVertex._f1,vertexPtrToIndexMap[newVertex._v1],
|
|
newVertex._f2,vertexPtrToIndexMap[newVertex._v2],
|
|
newVertex._f3,vertexPtrToIndexMap[newVertex._v3],
|
|
newVertex._f4,vertexPtrToIndexMap[newVertex._v4]);
|
|
|
|
// assign the rest of the attributes.
|
|
for(ArrayList::iterator aItr=arrays.begin();
|
|
aItr!=arrays.end();
|
|
++aItr)
|
|
{
|
|
(*aItr)->accept(inv);
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
void Tessellator::begin(GLenum mode)
|
|
{
|
|
_primList.push_back(new Prim(mode));
|
|
}
|
|
|
|
void Tessellator::vertex(osg::Vec3* vertex)
|
|
{
|
|
if (!_primList.empty())
|
|
{
|
|
Prim* prim = _primList.back().get();
|
|
prim->_vertices.push_back(vertex);
|
|
|
|
}
|
|
}
|
|
|
|
void Tessellator::combine(osg::Vec3* vertex,void* vertex_data[4],GLfloat weight[4])
|
|
{
|
|
_newVertexList.push_back(NewVertex(vertex,
|
|
weight[0],(Vec3*)vertex_data[0],
|
|
weight[1],(Vec3*)vertex_data[1],
|
|
weight[2],(Vec3*)vertex_data[2],
|
|
weight[3],(Vec3*)vertex_data[3]));
|
|
}
|
|
|
|
void Tessellator::end()
|
|
{
|
|
// no need to do anything right now...
|
|
}
|
|
|
|
void Tessellator::error(GLenum errorCode)
|
|
{
|
|
_errorCode = errorCode;
|
|
}
|
|
|
|
void CALLBACK Tessellator::beginCallback(GLenum which, void* userData)
|
|
{
|
|
((Tessellator*)userData)->begin(which);
|
|
}
|
|
|
|
void CALLBACK Tessellator::endCallback(void* userData)
|
|
{
|
|
((Tessellator*)userData)->end();
|
|
}
|
|
|
|
void CALLBACK Tessellator::vertexCallback(GLvoid *data, void* userData)
|
|
{
|
|
((Tessellator*)userData)->vertex((Vec3*)data);
|
|
}
|
|
|
|
void CALLBACK Tessellator::combineCallback(GLdouble coords[3], void* vertex_data[4],
|
|
GLfloat weight[4], void** outData,
|
|
void* userData)
|
|
{
|
|
Vec3* newData = new osg::Vec3(coords[0],coords[1],coords[2]);
|
|
*outData = newData;
|
|
((Tessellator*)userData)->combine(newData,vertex_data,weight);
|
|
}
|
|
|
|
void CALLBACK Tessellator::errorCallback(GLenum errorCode, void* userData)
|
|
{
|
|
((Tessellator*)userData)->error(errorCode);
|
|
}
|
|
|
|
void Tessellator::reduceArray(osg::Array * cold, const unsigned int nnu)
|
|
{ // shrinks size of array to N
|
|
if (cold && cold->getNumElements()>nnu) {
|
|
osg::Vec2Array* v2arr = NULL;
|
|
osg::Vec3Array* v3arr = NULL;
|
|
osg::Vec4Array* v4arr = NULL;
|
|
switch (cold->getType()) {
|
|
case osg::Array::Vec2ArrayType: {
|
|
v2arr = dynamic_cast<osg::Vec2Array*>(cold);
|
|
osg::Vec2Array::iterator itr=v2arr->begin()+nnu;
|
|
(*v2arr).erase(itr, v2arr->end());
|
|
}
|
|
break;
|
|
case osg::Array::Vec3ArrayType: {
|
|
v3arr = dynamic_cast<osg::Vec3Array*>(cold);
|
|
osg::Vec3Array::iterator itr=v3arr->begin()+nnu;
|
|
(*v3arr).erase(itr, v3arr->end());
|
|
}
|
|
break;
|
|
case osg::Array::Vec4ArrayType: {
|
|
v4arr = dynamic_cast<osg::Vec4Array*>(cold);
|
|
osg::Vec4Array::iterator itr=v4arr->begin()+nnu;
|
|
(*v4arr).erase(itr, v4arr->end());
|
|
}
|
|
break;
|
|
default: // should also handle:ArrayType' ByteArrayType' ShortArrayType' IntArrayType'
|
|
// `UShortArrayType' `UIntArrayType' `Vec4ubArrayType' `FloatArrayType'
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void Tessellator::collectTessellation(osg::Geometry &geom, unsigned int originalIndex)
|
|
{
|
|
osg::Vec3Array* vertices = dynamic_cast<osg::Vec3Array*>(geom.getVertexArray());
|
|
VertexPtrToIndexMap vertexPtrToIndexMap;
|
|
|
|
// populate the VertexPtrToIndexMap.
|
|
for(unsigned int vi=0;vi<vertices->size();++vi)
|
|
{
|
|
vertexPtrToIndexMap[&((*vertices)[vi])] = vi;
|
|
}
|
|
|
|
handleNewVertices(geom, vertexPtrToIndexMap);
|
|
|
|
// we don't properly handle per primitive and per primitive_set bindings yet
|
|
// will need to address this soon. Robert Oct 2002.
|
|
{
|
|
osg::Vec3Array* normals = NULL; // GWM Sep 2002 - add normals for extra facets
|
|
int iprim=0;
|
|
if (geom.getNormalBinding()==osg::Geometry::BIND_PER_PRIMITIVE ||
|
|
geom.getNormalBinding()==osg::Geometry::BIND_PER_PRIMITIVE_SET)
|
|
{
|
|
normals = dynamic_cast<osg::Vec3Array*>(geom.getNormalArray()); // GWM Sep 2002
|
|
}
|
|
// GWM Dec 2003 - needed to add colours for extra facets
|
|
osg::Vec4Array* cols4 = NULL; // GWM Dec 2003 colours are vec4
|
|
osg::Vec3Array* cols3 = NULL; // GWM Dec 2003 colours are vec3
|
|
if (geom.getColorBinding()==osg::Geometry::BIND_PER_PRIMITIVE ||
|
|
geom.getColorBinding()==osg::Geometry::BIND_PER_PRIMITIVE_SET)
|
|
{
|
|
Array* colours = geom.getColorArray(); // GWM Dec 2003 - need to duplicate face colours
|
|
switch (colours->getType()) {
|
|
case osg::Array::Vec4ArrayType:
|
|
cols4=dynamic_cast<osg::Vec4Array *> (colours);
|
|
break;
|
|
case osg::Array::Vec3ArrayType:
|
|
cols3=dynamic_cast<osg::Vec3Array *> (colours);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
}
|
|
// GWM Dec 2003 - these holders need to go outside the loop to
|
|
// retain the flat shaded colour &/or normal for each tessellated polygon
|
|
osg::Vec3 norm(0.0f,0.0f,0.0f);
|
|
osg::Vec4 primCol4(0.0f,0.0f,0.0f,1.0f);
|
|
osg::Vec3 primCol3(0.0f,0.0f,0.0f);
|
|
|
|
for(PrimList::iterator primItr=_primList.begin();
|
|
primItr!=_primList.end();
|
|
++primItr, ++_index)
|
|
{
|
|
Prim* prim=primItr->get();
|
|
int ntris=0;
|
|
|
|
if(vertexPtrToIndexMap.size() <= 255)
|
|
{
|
|
osg::DrawElementsUByte* elements = new osg::DrawElementsUByte(prim->_mode);
|
|
for(Prim::VecList::iterator vitr=prim->_vertices.begin();
|
|
vitr!=prim->_vertices.end();
|
|
++vitr)
|
|
{
|
|
elements->push_back(vertexPtrToIndexMap[*vitr]);
|
|
}
|
|
|
|
// add to the drawn primitive list.
|
|
geom.addPrimitiveSet(elements);
|
|
ntris=elements->getNumIndices()/3;
|
|
}
|
|
else if(vertexPtrToIndexMap.size() > 255 && vertexPtrToIndexMap.size() <= 65535)
|
|
{
|
|
osg::DrawElementsUShort* elements = new osg::DrawElementsUShort(prim->_mode);
|
|
for(Prim::VecList::iterator vitr=prim->_vertices.begin();
|
|
vitr!=prim->_vertices.end();
|
|
++vitr)
|
|
{
|
|
elements->push_back(vertexPtrToIndexMap[*vitr]);
|
|
}
|
|
|
|
// add to the drawn primitive list.
|
|
geom.addPrimitiveSet(elements);
|
|
ntris=elements->getNumIndices()/3;
|
|
}
|
|
else
|
|
{
|
|
osg::DrawElementsUInt* elements = new osg::DrawElementsUInt(prim->_mode);
|
|
for(Prim::VecList::iterator vitr=prim->_vertices.begin();
|
|
vitr!=prim->_vertices.end();
|
|
++vitr)
|
|
{
|
|
elements->push_back(vertexPtrToIndexMap[*vitr]);
|
|
}
|
|
|
|
// add to the drawn primitive list.
|
|
geom.addPrimitiveSet(elements);
|
|
ntris=elements->getNumIndices()/3;
|
|
}
|
|
|
|
if (primItr==_primList.begin())
|
|
{ // first primitive so collect primitive normal & colour.
|
|
if (normals) {
|
|
if (geom.getNormalBinding()==osg::Geometry::BIND_PER_PRIMITIVE)
|
|
norm=(*normals)[originalIndex + _extraPrimitives];
|
|
else
|
|
norm=(*normals)[iprim]; // GWM Sep 2002 the flat shaded normal
|
|
}
|
|
if (cols4) {
|
|
primCol4=(*cols4)[iprim]; // GWM Dec 2003 the flat shaded rgba colour
|
|
if (_index>=cols4->size()) {
|
|
cols4->push_back(primCol4); // GWM Dec 2003 add flat shaded colour for new facet
|
|
}
|
|
}
|
|
if (cols3) {
|
|
primCol3=(*cols3)[iprim]; // GWM Dec 2003 flat shaded rgb colour
|
|
if (_index>=cols3->size()) {
|
|
cols3->push_back(primCol3); // GWM Dec 2003 add flat shaded colour for new facet
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{ // later primitives use same colour
|
|
if (normals)
|
|
{
|
|
if (geom.getNormalBinding()==osg::Geometry::BIND_PER_PRIMITIVE)
|
|
{
|
|
_extraPrimitives++;
|
|
normals->insert(normals->begin() + originalIndex + _extraPrimitives, norm);
|
|
}
|
|
else
|
|
normals->push_back(norm); // GWM Sep 2002 add flat shaded normal for new facet
|
|
}
|
|
if (cols4 && _index>=cols4->size()) {
|
|
cols4->push_back(primCol4); // GWM Dec 2003 add flat shaded colour for new facet
|
|
}
|
|
if (cols3 && _index>=cols3->size()) {
|
|
if (cols3) cols3->push_back(primCol3); // GWM Dec 2003 add flat shaded colour for new facet
|
|
}
|
|
if (prim->_mode==GL_TRIANGLES) {
|
|
if (geom.getNormalBinding()==osg::Geometry::BIND_PER_PRIMITIVE_SET ||
|
|
geom.getNormalBinding()==osg::Geometry::BIND_PER_PRIMITIVE) { // need one per triangle? Not one per set.
|
|
for (int ii=1; ii<ntris; ii++) {
|
|
if (normals) normals->push_back(norm); // GWM Sep 2002 add flat shaded normal for new facet
|
|
}
|
|
}
|
|
if (geom.getColorBinding()==osg::Geometry::BIND_PER_PRIMITIVE_SET ||
|
|
geom.getColorBinding()==osg::Geometry::BIND_PER_PRIMITIVE) { // need one per triangle? Not one per set.
|
|
for (int ii=1; ii<ntris; ii++) {
|
|
if (cols3 && _index>=cols3->size()) {
|
|
if (cols3) cols3->push_back(primCol3);
|
|
}
|
|
if (cols4 && _index>=cols4->size()) {
|
|
if (cols4) cols4->push_back(primCol4);
|
|
}
|
|
_index++;
|
|
}
|
|
}
|
|
}
|
|
// OSG_WARN<<"Add: "<< iprim << std::endl;
|
|
}
|
|
iprim++; // GWM Sep 2002 count which normal we should use
|
|
}
|
|
}
|
|
}
|