void DrawElementTypeSimplifier::simplify(osg::Geometry & geometry) const
{
osg::Geometry::PrimitiveSetList & psl = geometry.getPrimitiveSetList();
osg::Geometry::PrimitiveSetList::iterator it, end = psl.end();
unsigned int max = 0;
for (it = psl.begin(); it!=end; ++it)
{
switch ((*it)->getType())
{
case osg::PrimitiveSet::DrawElementsUShortPrimitiveType:
{
osg::DrawElementsUShort & de = *static_cast<osg::DrawElementsUShort*>(it->get());
max = getMax<osg::DrawElementsUShort>(de);
if (max < 255) *it = copy<osg::DrawElementsUShort, osg::DrawElementsUByte>(de);
break;
}
case osg::PrimitiveSet::DrawElementsUIntPrimitiveType:
{
osg::DrawElementsUInt & de = *static_cast<osg::DrawElementsUInt*>(it->get());
max = getMax<osg::DrawElementsUInt>(de);
if (max < 256) *it = copy<osg::DrawElementsUInt, osg::DrawElementsUByte>(de);
else if (max < 65536) *it = copy<osg::DrawElementsUInt, osg::DrawElementsUShort>(de);
break;
}
default: break;
}
}
}
void RigGeometry::copyFrom(osg::Geometry& from)
{
bool copyToSelf = (this==&from);
osg::Geometry& target = *this;
if (!copyToSelf) target.setStateSet(from.getStateSet());
// copy over primitive sets.
if (!copyToSelf) target.getPrimitiveSetList() = from.getPrimitiveSetList();
if (from.getVertexArray())
{
if (!copyToSelf) target.setVertexArray(from.getVertexArray());
}
if (from.getNormalArray())
{
if (!copyToSelf) target.setNormalArray(from.getNormalArray());
}
if (from.getColorArray())
{
if (!copyToSelf) target.setColorArray(from.getColorArray());
}
if (from.getSecondaryColorArray())
{
if (!copyToSelf) target.setSecondaryColorArray(from.getSecondaryColorArray());
}
if (from.getFogCoordArray())
{
if (!copyToSelf) target.setFogCoordArray(from.getFogCoordArray());
}
for(unsigned int ti=0;ti<from.getNumTexCoordArrays();++ti)
{
if (from.getTexCoordArray(ti))
{
if (!copyToSelf) target.setTexCoordArray(ti,from.getTexCoordArray(ti));
}
}
osg::Geometry::ArrayList& arrayList = from.getVertexAttribArrayList();
for(unsigned int vi=0;vi< arrayList.size();++vi)
{
osg::Array* array = arrayList[vi].get();
if (array)
{
if (!copyToSelf) target.setVertexAttribArray(vi,array);
}
}
}
void osgToy::FacetingVisitor::facet( osg::Geometry& geom )
{
// count #surfaces, exit if none
osg::Geometry::PrimitiveSetList& primitives = geom.getPrimitiveSetList();
osg::Geometry::PrimitiveSetList::iterator itr;
unsigned int numSurfacePrimitives=0;
for(itr=primitives.begin();
itr!=primitives.end();
++itr)
{
switch((*itr)->getMode())
{
case osg::PrimitiveSet::TRIANGLES:
case osg::PrimitiveSet::TRIANGLE_STRIP:
case osg::PrimitiveSet::TRIANGLE_FAN:
case osg::PrimitiveSet::QUADS:
case osg::PrimitiveSet::QUAD_STRIP:
case osg::PrimitiveSet::POLYGON:
++numSurfacePrimitives;
break;
default:
break;
}
}
if (!numSurfacePrimitives) return;
// exit if no vertices
osg::Vec3Array *coords = dynamic_cast<osg::Vec3Array*>(geom.getVertexArray());
if (!coords || !coords->size()) return;
// generate the normals
osg::Vec3Array *normals = new osg::Vec3Array(coords->size());
osg::TriangleIndexFunctor<FacetingOperator> ftif;
ftif.set( coords, normals );
geom.accept(ftif);
geom.setNormalArray( normals );
geom.setNormalIndices( geom.getVertexIndices() );
geom.setNormalBinding(osg::Geometry::BIND_PER_VERTEX);
geom.dirtyDisplayList();
}
bool
Tessellator::tessellateGeometry(osg::Geometry &geom)
{
osg::Vec3Array* vertices = dynamic_cast<osg::Vec3Array*>(geom.getVertexArray());
if (!vertices || vertices->empty() || geom.getPrimitiveSetList().empty()) return false;
// copy the original primitive set list
osg::Geometry::PrimitiveSetList originalPrimitives = geom.getPrimitiveSetList();
// clear the primitive sets
unsigned int nprimsetoriginal= geom.getNumPrimitiveSets();
if (nprimsetoriginal) geom.removePrimitiveSet(0, nprimsetoriginal);
bool success = true;
for (unsigned int i=0; i < originalPrimitives.size(); i++)
{
osg::ref_ptr<osg::PrimitiveSet> primitive = originalPrimitives[i].get();
if (primitive->getMode()==osg::PrimitiveSet::POLYGON || primitive->getMode()==osg::PrimitiveSet::LINE_LOOP)
{
if (primitive->getType()==osg::PrimitiveSet::DrawArrayLengthsPrimitiveType)
{
osg::DrawArrayLengths* drawArrayLengths = static_cast<osg::DrawArrayLengths*>(primitive.get());
unsigned int first = drawArrayLengths->getFirst();
for(osg::DrawArrayLengths::iterator itr=drawArrayLengths->begin();
itr!=drawArrayLengths->end();
++itr)
{
unsigned int last = first + *itr;
osg::PrimitiveSet* newPrimitive = tessellatePrimitive(first, last, vertices);
if (newPrimitive)
{
geom.addPrimitiveSet(newPrimitive);
}
else
{
// tessellation failed, add old primitive set back
geom.addPrimitiveSet(primitive);
success = false;
}
first = last;
}
}
else
{
if (primitive->getNumIndices()>=3)
{
osg::PrimitiveSet* newPrimitive = tessellatePrimitive(primitive.get(), vertices);
if (newPrimitive)
{
geom.addPrimitiveSet(newPrimitive);
}
else
{
// tessellation failed, add old primitive set back
geom.addPrimitiveSet(primitive);
success = false;
}
}
}
}
else
{
//
// TODO: handle more primitive modes
//
}
}
return success;
}
void
GeometryValidator::apply(osg::Geometry& geom)
{
if ( geom.getVertexArray() == 0L )
{
OE_NOTICE << LC << "NULL vertex array!!\n";
return;
}
unsigned numVerts = geom.getVertexArray()->getNumElements();
if ( numVerts == 0 )
{
OE_NOTICE << LC << "No verts!! name=" << geom.getName() << "\n";
return;
}
std::set<osg::BufferObject*> _vbos;
osg::Geometry::ArrayList arrays;
geom.getArrayList(arrays);
for(unsigned i=0; i<arrays.size(); ++i)
{
osg::Array* a = arrays[i].get();
if ( a )
{
if ( a->getBinding() == a->BIND_OVERALL && a->getNumElements() != 1 )
{
OE_NOTICE << LC << "Found an array with BIND_OVERALL and size <> 1\n";
}
else if ( a->getBinding() == a->BIND_PER_VERTEX && a->getNumElements() != numVerts )
{
OE_NOTICE << LC << "Found BIND_PER_VERTEX with wrong number of elements (expecting " << numVerts << "; found " << a->getNumElements() << ")\n";
}
_vbos.insert( a->getVertexBufferObject() );
}
else
{
OE_NOTICE << LC << "Found a NULL array\n";
}
}
if ( _vbos.size() != 1 )
{
OE_NOTICE << LC << "Found a Geometry that uses more than one VBO (non-optimal sharing)\n";
}
const osg::Geometry::PrimitiveSetList& plist = geom.getPrimitiveSetList();
std::set<osg::BufferObject*> _ebos;
for( osg::Geometry::PrimitiveSetList::const_iterator p = plist.begin(); p != plist.end(); ++p )
{
osg::PrimitiveSet* pset = p->get();
osg::DrawArrays* da = dynamic_cast<osg::DrawArrays*>(pset);
if ( da )
{
if ( da->getFirst() >= numVerts )
{
OE_NOTICE << LC << "DrawArrays: first > numVerts\n";
}
if ( da->getFirst()+da->getCount() > numVerts )
{
OE_NOTICE << LC << "DrawArrays: first/count out of bounds\n";
}
if ( da->getCount() < 1 )
{
OE_NOTICE << LC << "DrawArrays: count is zero\n";
}
}
bool isDe = pset->getDrawElements() != 0L;
osg::DrawElementsUByte* de_byte = dynamic_cast<osg::DrawElementsUByte*>(pset);
if ( de_byte )
{
validateDE(de_byte, 0xFF, numVerts );
_ebos.insert( de_byte->getElementBufferObject() );
}
osg::DrawElementsUShort* de_short = dynamic_cast<osg::DrawElementsUShort*>(pset);
if ( de_short )
{
validateDE(de_short, 0xFFFF, numVerts );
_ebos.insert( de_short->getElementBufferObject() );
}
osg::DrawElementsUInt* de_int = dynamic_cast<osg::DrawElementsUInt*>(pset);
if ( de_int )
{
validateDE(de_int, 0xFFFFFFFF, numVerts );
_ebos.insert( de_int->getElementBufferObject() );
}
if ( pset->getNumIndices() == 0 )
{
OE_NOTICE << LC << "Primset: num elements = 0; class=" << pset->className() << ", name=" << pset->getName() << "\n";
}
else if ( pset->getType() >= GL_TRIANGLES && pset->getNumIndices() < 3 )
{
OE_NOTICE << LC << "Primset: not enough indicies for surface prim type\n";
}
else if ( pset->getType() >= GL_LINE_STRIP && pset->getNumIndices() < 2 )
{
OE_NOTICE << LC << "Primset: not enough indicies for linear prim type\n";
}
else if ( isDe && pset->getType() == GL_LINES && pset->getNumIndices() % 2 != 0 )
{
OE_NOTICE << LC << "Primset: non-even index count for GL_LINES\n";
}
}
if ( _ebos.size() != 1 )
{
OE_NOTICE << LC << "Found a Geometry that uses more than one EBO (non-optimal sharing)\n";
}
}
void UnIndexMeshVisitor::apply(osg::Geometry& geom)
{
// no point optimizing if we don't have enough vertices.
if (!geom.getVertexArray()) return;
// check for the existence of surface primitives
unsigned int numIndexedPrimitives = 0;
osg::Geometry::PrimitiveSetList& primitives = geom.getPrimitiveSetList();
osg::Geometry::PrimitiveSetList::iterator itr;
for(itr=primitives.begin();
itr!=primitives.end();
++itr)
{
osg::PrimitiveSet::Type type = (*itr)->getType();
if ((type == osg::PrimitiveSet::DrawElementsUBytePrimitiveType
|| type == osg::PrimitiveSet::DrawElementsUShortPrimitiveType
|| type == osg::PrimitiveSet::DrawElementsUIntPrimitiveType))
numIndexedPrimitives++;
}
// no polygons or no indexed primitive, nothing to do
if (!numIndexedPrimitives) {
return;
}
// we dont manage lines
GeometryArrayList arraySrc(geom);
GeometryArrayList arrayList = arraySrc.cloneType();
osg::Geometry::PrimitiveSetList newPrimitives;
for(itr=primitives.begin();
itr!=primitives.end();
++itr)
{
osg::PrimitiveSet::Mode mode = (osg::PrimitiveSet::Mode)(*itr)->getMode();
switch(mode) {
// manage triangles
case(osg::PrimitiveSet::TRIANGLES):
case(osg::PrimitiveSet::TRIANGLE_STRIP):
case(osg::PrimitiveSet::TRIANGLE_FAN):
case(osg::PrimitiveSet::QUADS):
case(osg::PrimitiveSet::QUAD_STRIP):
case(osg::PrimitiveSet::POLYGON):
{
// for each geometry list indexes of vertexes
// to makes triangles
TriangleIndexor triangleIndexList;
(*itr)->accept(triangleIndexList);
unsigned int index = arrayList.size();
// now copy each vertex to new array, like a draw array
arraySrc.append(triangleIndexList._indices, arrayList);
newPrimitives.push_back(new osg::DrawArrays(osg::PrimitiveSet::TRIANGLES,
index,
triangleIndexList._indices.size()));
}
break;
// manage lines
case(osg::PrimitiveSet::LINES):
case(osg::PrimitiveSet::LINE_STRIP):
case(osg::PrimitiveSet::LINE_LOOP):
{
EdgeIndexor edgesIndexList;
(*itr)->accept(edgesIndexList);
unsigned int index = arrayList.size();
// now copy each vertex to new array, like a draw array
arraySrc.append(edgesIndexList._indices, arrayList);
newPrimitives.push_back(new osg::DrawArrays(osg::PrimitiveSet::LINES,
index,
edgesIndexList._indices.size()));
}
break;
case(osg::PrimitiveSet::POINTS):
{
PointIndexor pointsIndexList;
(*itr)->accept(pointsIndexList);
unsigned int index = arrayList.size();
// now copy each vertex to new array, like a draw array
arraySrc.append(pointsIndexList._indices, arrayList);
newPrimitives.push_back(new osg::DrawArrays(osg::PrimitiveSet::POINTS,
index,
pointsIndexList._indices.size()));
}
break;
default:
break;
}
}
arrayList.setToGeometry(geom);
geom.setPrimitiveSetList(newPrimitives);
}
void Tessellator::retessellatePolygons(osg::Geometry &geom)
{
#ifdef OSG_GLU_AVAILABLE
// turn the contour list into primitives, a little like Tessellator does but more generally
osg::Vec3Array* vertices = dynamic_cast<osg::Vec3Array*>(geom.getVertexArray());
if (!vertices || vertices->empty() || geom.getPrimitiveSetList().empty()) return;
// we currently don't handle geometry which use indices...
if (geom.getVertexIndices() ||
geom.getNormalIndices() ||
geom.getColorIndices() ||
geom.getSecondaryColorIndices() ||
geom.getFogCoordIndices()) return;
// not even text coord indices don't handle geometry which use indices...
for(unsigned int unit=0;unit<geom.getNumTexCoordArrays();++unit)
{
if (geom.getTexCoordIndices(unit)) return;
}
if (_ttype==TESS_TYPE_POLYGONS || _ttype==TESS_TYPE_DRAWABLE) _numberVerts=0; // 09.04.04 GWM reset Tessellator
// the reset is needed by the flt loader which reuses a Tessellator for triangulating polygons.
// as such it might be reset by other loaders/developers in future.
_index=0; // reset the counter for indexed vertices
_extraPrimitives = 0;
if (!_numberVerts) {
_numberVerts=geom.getVertexArray()->getNumElements();
// save the contours for complex (winding rule) tessellations
_Contours=geom.getPrimitiveSetList();
}
// now cut out vertex attributes added on any previous tessellation
reduceArray(geom.getVertexArray(), _numberVerts);
reduceArray(geom.getColorArray(), _numberVerts);
reduceArray(geom.getNormalArray(), _numberVerts);
reduceArray(geom.getFogCoordArray(), _numberVerts);
for(unsigned int unit1=0;unit1<geom.getNumTexCoordArrays();++unit1)
{
reduceArray(geom.getTexCoordArray(unit1), _numberVerts);
}
// remove the existing primitives.
unsigned int nprimsetoriginal= geom.getNumPrimitiveSets();
if (nprimsetoriginal) geom.removePrimitiveSet(0, nprimsetoriginal);
// the main difference from osgUtil::Tessellator for Geometry sets of multiple contours is that the begin/end tessellation
// occurs around the whole set of contours.
if (_ttype==TESS_TYPE_GEOMETRY) {
beginTessellation();
gluTessProperty(_tobj, GLU_TESS_WINDING_RULE, _wtype);
gluTessProperty(_tobj, GLU_TESS_BOUNDARY_ONLY , _boundaryOnly);
}
// process all the contours into the Tessellator
int noContours = _Contours.size();
int currentPrimitive = 0;
for(int primNo=0;primNo<noContours;++primNo)
{
osg::ref_ptr<osg::PrimitiveSet> primitive = _Contours[primNo].get();
if (_ttype==TESS_TYPE_POLYGONS || _ttype==TESS_TYPE_DRAWABLE)
{ // this recovers the 'old' tessellation which just retessellates single polygons.
if (primitive->getMode()==osg::PrimitiveSet::POLYGON || _ttype==TESS_TYPE_DRAWABLE)
{
if (primitive->getType()==osg::PrimitiveSet::DrawArrayLengthsPrimitiveType)
{
osg::DrawArrayLengths* drawArrayLengths = static_cast<osg::DrawArrayLengths*>(primitive.get());
unsigned int first = drawArrayLengths->getFirst();
for(osg::DrawArrayLengths::iterator itr=drawArrayLengths->begin();
itr!=drawArrayLengths->end();
++itr)
{
beginTessellation();
unsigned int last = first + *itr;
addContour(primitive->getMode(),first,last,vertices);
first = last;
endTessellation();
collectTessellation(geom, currentPrimitive);
currentPrimitive++;
}
}
else
{
if (primitive->getNumIndices()>3) { // April 2005 gwm only retessellate "complex" polygons
beginTessellation();
addContour(primitive.get(), vertices);
endTessellation();
collectTessellation(geom, currentPrimitive);
currentPrimitive++;
} else { // April 2005 gwm triangles don't need to be retessellated
geom.addPrimitiveSet(primitive.get());
}
}
}
else
{ // copy the contour primitive as it is not being tessellated
geom.addPrimitiveSet(primitive.get());
}
} else {
if (primitive->getMode()==osg::PrimitiveSet::POLYGON ||
primitive->getMode()==osg::PrimitiveSet::QUADS ||
primitive->getMode()==osg::PrimitiveSet::TRIANGLES ||
primitive->getMode()==osg::PrimitiveSet::LINE_LOOP ||
primitive->getMode()==osg::PrimitiveSet::QUAD_STRIP ||
primitive->getMode()==osg::PrimitiveSet::TRIANGLE_FAN ||
primitive->getMode()==osg::PrimitiveSet::TRIANGLE_STRIP)
{
addContour(primitive.get(), vertices);
} else { // copy the contour primitive as it is not being tessellated
// in this case points, lines or line_strip
geom.addPrimitiveSet(primitive.get());
}
}
}
if (_ttype==TESS_TYPE_GEOMETRY) {
endTessellation();
collectTessellation(geom, 0);
}
#endif
}
void
MeshConsolidator::convertToTriangles( osg::Geometry& geom, bool force )
{
if ( !force && !canOptimize(geom) )
return;
osg::Geometry::PrimitiveSetList& primSets = geom.getPrimitiveSetList();
osg::Geometry::PrimitiveSetList triSets, nonTriSets;
for( osg::Geometry::PrimitiveSetList::iterator i = primSets.begin(); i != primSets.end(); ++i )
{
osg::PrimitiveSet* pset = i->get();
switch( pset->getMode() )
{
case osg::PrimitiveSet::TRIANGLES:
case osg::PrimitiveSet::TRIANGLE_STRIP:
case osg::PrimitiveSet::TRIANGLE_FAN:
case osg::PrimitiveSet::QUADS:
case osg::PrimitiveSet::QUAD_STRIP:
case osg::PrimitiveSet::POLYGON:
triSets.push_back( pset );
break;
default:
nonTriSets.push_back( pset );
}
}
if ( triSets.size() > 0 )
{
// we are assuming at this point that all the primitive sets in a single geometry
// share a single user data structure.
osg::Referenced* sharedUserData = triSets[0]->getUserData();
osg::Array* vertexArray = geom.getVertexArray();
unsigned numVerts = vertexArray->getNumElements();
osg::Geometry::PrimitiveSetList newPrimSets;
if ( numVerts < 0x100 )
{
osg::TriangleIndexFunctor< Collector<osg::DrawElementsUByte> > collector;
collector._newPrimSets = &newPrimSets;
collector._maxSize = 0xFF;
geom.accept( collector );
}
else if ( numVerts < 0x10000 )
{
osg::TriangleIndexFunctor< Collector<osg::DrawElementsUShort> > collector;
collector._newPrimSets = &newPrimSets;
collector._maxSize = 0xFFFF;
geom.accept( collector );
}
else
{
#ifdef OSG_GLES2_AVAILABLE
// GLES only supports UShort, not UInt
osg::TriangleIndexFunctor< Collector<osg::DrawElementsUShort> > collector;
collector._newPrimSets = &newPrimSets;
collector._maxSize = 0xFFFF;
geom.accept( collector );
#else
osg::TriangleIndexFunctor< Collector<osg::DrawElementsUInt> > collector;
collector._newPrimSets = &newPrimSets;
collector._maxSize = 0xFFFFFFFF;
geom.accept( collector );
#endif
}
for( osg::Geometry::PrimitiveSetList::iterator i = newPrimSets.begin(); i != newPrimSets.end(); ++i )
{
i->get()->setUserData( sharedUserData );
nonTriSets.push_back( i->get() );
}
}
geom.setPrimitiveSetList( nonTriSets );
}
void
GeometryValidator::apply(osg::Geometry& geom)
{
unsigned numVerts = geom.getVertexArray()->getNumElements();
if ( geom.getColorArray() )
{
if ( geom.getColorBinding() == osg::Geometry::BIND_OVERALL && geom.getColorArray()->getNumElements() != 1 )
{
OE_WARN << "Color: BIND_OVERALL with wrong number of elements" << std::endl;
}
else if ( geom.getColorBinding() == osg::Geometry::BIND_PER_VERTEX && geom.getColorArray()->getNumElements() != numVerts )
{
OE_WARN << "Color: BIND_PER_VERTEX with color.size != verts.size" << std::endl;
}
}
if ( geom.getNormalArray() )
{
if ( geom.getNormalBinding() == osg::Geometry::BIND_OVERALL && geom.getNormalArray()->getNumElements() != 1 )
{
OE_WARN << "Normal: BIND_OVERALL with wrong number of elements" << std::endl;
}
else if ( geom.getNormalBinding() == osg::Geometry::BIND_PER_VERTEX && geom.getNormalArray()->getNumElements() != numVerts )
{
OE_WARN << "Normal: BIND_PER_VERTEX with color.size != verts.size" << std::endl;
}
}
const osg::Geometry::PrimitiveSetList& plist = geom.getPrimitiveSetList();
for( osg::Geometry::PrimitiveSetList::const_iterator p = plist.begin(); p != plist.end(); ++p )
{
osg::PrimitiveSet* pset = p->get();
osg::DrawElementsUByte* de_byte = dynamic_cast<osg::DrawElementsUByte*>(pset);
if ( de_byte )
{
if ( numVerts > 0xFF )
{
OE_WARN << "DrawElementsUByte used when numVerts > 255 (" << numVerts << ")" << std::endl;
}
validateDE(de_byte, 0xFF, numVerts );
}
osg::DrawElementsUShort* de_short = dynamic_cast<osg::DrawElementsUShort*>(pset);
if ( de_short )
{
if ( numVerts > 0xFFFF )
{
OE_WARN << "DrawElementsUShort used when numVerts > 65535 (" << numVerts << ")" << std::endl;
}
validateDE(de_short, 0xFFFF, numVerts );
}
osg::DrawElementsUInt* de_int = dynamic_cast<osg::DrawElementsUInt*>(pset);
if ( de_int )
{
validateDE(de_int, 0xFFFFFFFF, numVerts );
}
}
}
void IndexMeshVisitor::apply(osg::Geometry& geom) {
// TODO: this is deprecated
if (geom.getNormalBinding() == osg::Geometry::BIND_PER_PRIMITIVE_SET) return;
if (geom.getColorBinding() == osg::Geometry::BIND_PER_PRIMITIVE_SET) return;
if (geom.getSecondaryColorBinding() == osg::Geometry::BIND_PER_PRIMITIVE_SET) return;
if (geom.getFogCoordBinding() == osg::Geometry::BIND_PER_PRIMITIVE_SET) return;
// no point optimizing if we don't have enough vertices.
if (!geom.getVertexArray() || geom.getVertexArray()->getNumElements() < 3) return;
osgUtil::SharedArrayOptimizer deduplicator;
deduplicator.findDuplicatedUVs(geom);
// duplicate shared arrays as it isn't safe to rearrange vertices when arrays are shared.
if (geom.containsSharedArrays()) {
geom.duplicateSharedArrays();
}
osg::Geometry::PrimitiveSetList& primitives = geom.getPrimitiveSetList();
osg::Geometry::PrimitiveSetList::iterator itr;
osg::Geometry::PrimitiveSetList new_primitives;
new_primitives.reserve(primitives.size());
// compute duplicate vertices
typedef std::vector<unsigned int> IndexList;
unsigned int numVertices = geom.getVertexArray()->getNumElements();
IndexList indices(numVertices);
unsigned int i, j;
for(i = 0 ; i < numVertices ; ++ i) {
indices[i] = i;
}
VertexAttribComparitor arrayComparitor(geom);
std::sort(indices.begin(), indices.end(), arrayComparitor);
unsigned int lastUnique = 0;
unsigned int numUnique = 1;
for(i = 1 ; i < numVertices ; ++ i) {
if (arrayComparitor.compare(indices[lastUnique], indices[i]) != 0) {
lastUnique = i;
++ numUnique;
}
}
IndexList remapDuplicatesToOrignals(numVertices);
lastUnique = 0;
for(i = 1 ; i < numVertices ; ++ i) {
if (arrayComparitor.compare(indices[lastUnique],indices[i]) != 0) {
// found a new vertex entry, so previous run of duplicates needs
// to be put together.
unsigned int min_index = indices[lastUnique];
for(j = lastUnique + 1 ; j < i ; ++ j) {
min_index = osg::minimum(min_index, indices[j]);
}
for(j = lastUnique ; j < i ; ++ j) {
remapDuplicatesToOrignals[indices[j]] = min_index;
}
lastUnique = i;
}
}
unsigned int min_index = indices[lastUnique];
for(j = lastUnique + 1 ; j < i ; ++ j) {
min_index = osg::minimum(min_index, indices[j]);
}
for(j = lastUnique ; j < i ; ++ j) {
remapDuplicatesToOrignals[indices[j]] = min_index;
}
// copy the arrays.
IndexList finalMapping(numVertices);
IndexList copyMapping;
copyMapping.reserve(numUnique);
unsigned int currentIndex = 0;
for(i = 0 ; i < numVertices ; ++ i) {
if (remapDuplicatesToOrignals[i] == i) {
finalMapping[i] = currentIndex;
copyMapping.push_back(i);
currentIndex++;
}
else {
finalMapping[i] = finalMapping[remapDuplicatesToOrignals[i]];
}
}
// remap any shared vertex attributes
RemapArray ra(copyMapping);
arrayComparitor.accept(ra);
// triangulate faces
{
TriangleIndexor ti;
ti._maxIndex = numVertices;
ti._remapping = finalMapping;
for(itr = primitives.begin() ; itr != primitives.end() ; ++ itr) {
(*itr)->accept(ti);
}
addDrawElements(ti._indices, osg::PrimitiveSet::TRIANGLES, new_primitives);
}
// line-ify line-type primitives
{
LineIndexor li, wi; // lines and wireframes
li._maxIndex = numVertices;
wi._maxIndex = numVertices;
li._remapping = finalMapping;
wi._remapping = finalMapping;
for(itr = primitives.begin() ; itr != primitives.end() ; ++ itr) {
bool isWireframe = false;
if((*itr)->getUserValue("wireframe", isWireframe) && isWireframe) {
(*itr)->accept(wi);
}
else {
(*itr)->accept(li);
}
}
addDrawElements(li._indices, osg::PrimitiveSet::LINES, new_primitives);
addDrawElements(wi._indices, osg::PrimitiveSet::LINES, new_primitives, "wireframe");
}
// adds points primitives
{
IndexList points;
for(itr = primitives.begin() ; itr != primitives.end() ; ++ itr) {
if((*itr) && (*itr)->getMode() == osg::PrimitiveSet::POINTS) {
for(unsigned int k = 0 ; k < (*itr)->getNumIndices() ; ++ k) {
points.push_back(finalMapping[(*itr)->index(k)]);
}
}
}
addDrawElements(points, osg::PrimitiveSet::POINTS, new_primitives);
}
geom.setPrimitiveSetList(new_primitives);
deduplicator.deduplicateUVs(geom);
setProcessed(&geom);
}