Hi Robert, hi all, I guess this submission will not be added "as-is" into OSG since it's only a copy-paste-modify ugly thing, but LGPL asks me to do so... So here is a modified osgUtil::Tessellator (named Tessellatord) which works on double-precision vertices.
If anyone wants to build an unique Tesselator handling both... :) Cheers, Sukender PVLE - Lightweight cross-platform game engine - http://pvle.sourceforge.net/
Tessellatord
Description: Binary data
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
*
* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* OpenSceneGraph Public License for more details.
*/
#include <osg/GL>
#include <osg/GLU>
#include <osg/Notify>
#include <osgUtil/Tessellatord>
using namespace osg;
using namespace osgUtil;
Tessellatord::Tessellatord() :
_wtype(TESS_WINDING_ODD),
_ttype(TESS_TYPE_POLYGONS),
_boundaryOnly(false), _numberVerts(0)
{
_tobj = 0;
_errorCode = 0;
_index=0;
#ifndef OSG_GLU_AVAILABLE
osg::notify(osg::NOTICE)<<"Warning: gluTesselation not
supported."<<std::endl;
#endif
}
Tessellatord::~Tessellatord()
{
reset();
}
void Tessellatord::beginTessellation()
{
reset();
#ifdef OSG_GLU_AVAILABLE
if (!_tobj) _tobj = gluNewTess();
gluTessCallback(_tobj, GLU_TESS_VERTEX_DATA, (GLU_TESS_CALLBACK)
vertexCallback);
gluTessCallback(_tobj, GLU_TESS_BEGIN_DATA, (GLU_TESS_CALLBACK)
beginCallback);
gluTessCallback(_tobj, GLU_TESS_END_DATA, (GLU_TESS_CALLBACK)
endCallback);
gluTessCallback(_tobj, GLU_TESS_COMBINE_DATA,(GLU_TESS_CALLBACK)
combineCallback);
gluTessCallback(_tobj, GLU_TESS_ERROR_DATA, (GLU_TESS_CALLBACK)
errorCallback);
if (tessNormal.length()>0.0) gluTessNormal(_tobj, tessNormal.x(),
tessNormal.y(), tessNormal.z());
gluTessBeginPolygon(_tobj,this);
#else
osg::notify(osg::NOTICE)<<"Warning: gluTesselation not
supported."<<std::endl;
#endif
}
void Tessellatord::beginContour()
{
#ifdef OSG_GLU_AVAILABLE
if (_tobj)
{
gluTessBeginContour(_tobj);
}
#endif
}
void Tessellatord::addVertex(Vertex* vertex)
{
#ifdef OSG_GLU_AVAILABLE
if (_tobj)
{
Vec3d* data = new Vec3d;
_coordData.push_back(data);
(*data)._v[0]=(*vertex)[0];
(*data)._v[1]=(*vertex)[1];
(*data)._v[2]=(*vertex)[2];
gluTessVertex(_tobj,data->_v,vertex);
}
#endif
}
void Tessellatord::endContour()
{
#ifdef OSG_GLU_AVAILABLE
if (_tobj)
{
gluTessEndContour(_tobj);
}
#endif
}
void Tessellatord::endTessellation()
{
#ifdef OSG_GLU_AVAILABLE
if (_tobj)
{
gluTessEndPolygon(_tobj);
gluDeleteTess(_tobj);
_tobj = 0;
if (_errorCode!=0)
{
const GLubyte *estring = gluErrorString((GLenum)_errorCode);
osg::notify(osg::WARN)<<"Tessellation Error: "<<estring<< std::endl;
}
}
#endif
}
void Tessellatord::reset()
{
#ifdef OSG_GLU_AVAILABLE
if (_tobj)
{
gluDeleteTess(_tobj);
_tobj = 0;
}
#endif
for (Vec3dList::iterator i = _coordData.begin(); i != _coordData.end(); ++i)
{
delete (*i);
}
// We need to also free the vertex list as well otherwise we are leaking...
for (NewVertexList::iterator j = _newVertexList.begin(); j !=
_newVertexList.end(); ++j)
{
NewVertex& newVertex = (*j);
delete newVertex._vpos;
newVertex._vpos = NULL;
}
_coordData.clear();
_newVertexList.clear();
_primList.clear();
_errorCode = 0;
}
class InsertNewVertices : public osg::ArrayVisitor
{
public:
Tessellatord::Vertex::value_type _f1,_f2,_f3,_f4;
unsigned int _i1,_i2,_i3,_i4;
InsertNewVertices(Tessellatord::Vertex::value_type f1,unsigned int i1,
Tessellatord::Vertex::value_type f2,unsigned int i2,
Tessellatord::Vertex::value_type f3,unsigned int i3,
Tessellatord::Vertex::value_type f4,unsigned int i4):
_f1(f1),_f2(f2),_f3(f3),_f4(f4),
_i1(i1),_i2(i2),_i3(i3),_i4(i4){}
template <class ARRAY,class TYPE>
void apply_imp(ARRAY& array,TYPE initialValue)
{
TYPE val = initialValue;
if (_f1) val += static_cast<TYPE>(array[_i1] * _f1);
if (_f2) val += static_cast<TYPE>(array[_i2] * _f2);
if (_f3) val += static_cast<TYPE>(array[_i3] * _f3);
if (_f4) val += static_cast<TYPE>(array[_i4] * _f4);
array.push_back(val);
}
virtual void apply(osg::ByteArray& ba) { apply_imp(ba,GLbyte(0)); }
virtual void apply(osg::ShortArray& ba) { apply_imp(ba,GLshort(0)); }
virtual void apply(osg::IntArray& ba) { apply_imp(ba,GLint(0)); }
virtual void apply(osg::UByteArray& ba) { apply_imp(ba,GLubyte(0)); }
virtual void apply(osg::UShortArray& ba) { apply_imp(ba,GLushort(0)); }
virtual void apply(osg::UIntArray& ba) { apply_imp(ba,GLuint(0)); }
virtual void apply(osg::Vec4ubArray& ba) { apply_imp(ba,Vec4ub()); }
virtual void apply(osg::FloatArray& ba) { apply_imp(ba,float(0)); }
virtual void apply(osg::Vec2Array& ba) { apply_imp(ba,Vec2()); }
virtual void apply(osg::Vec3Array& ba) { apply_imp(ba,Vec3()); }
virtual void apply(osg::Vec4Array& ba) { apply_imp(ba,Vec4()); }
virtual void apply(osg::Vec2dArray& ba) { apply_imp(ba,Vec2d()); }
virtual void apply(osg::Vec3dArray& ba) { apply_imp(ba,Vec3d()); }
virtual void apply(osg::Vec4dArray& ba) { apply_imp(ba,Vec4d()); }
};
void Tessellatord::retessellatePolygons(osg::Geometry &geom)
{
#ifdef OSG_GLU_AVAILABLE
// turn the contour list into primitives, a little like Tessellatord does
but more generally
VertexArray* vertices = dynamic_cast<VertexArray*>(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 Tessellatord
// the reset is needed by the flt loader which reuses a Tessellatord 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::Tessellatord 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 Tessellatord
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 Tessellatord::addContour(GLenum mode, unsigned int first, unsigned int
last, VertexArray* vertices)
{
beginContour();
unsigned int idx=0;
unsigned int nperprim=0; // number of vertices per primitive
if (mode==osg::PrimitiveSet::QUADS) nperprim=4;
else if (mode==osg::PrimitiveSet::TRIANGLES) nperprim=3;
unsigned int i;
switch (mode)
{
case osg::PrimitiveSet::QUADS:
case osg::PrimitiveSet::TRIANGLES:
case osg::PrimitiveSet::POLYGON:
case osg::PrimitiveSet::LINE_LOOP:
case osg::PrimitiveSet::TRIANGLE_FAN:
{
for(i=first;i<last;++i, idx++)
{
addVertex(&((*vertices)[i]));
if (nperprim>0 && i<last-1 && idx%nperprim==nperprim-1) {
endContour();
beginContour();
}
}
}
break;
case osg::PrimitiveSet::QUAD_STRIP:
{ // always has an even number of vertices
for(i=first;i<last;i+=2)
{ // 0,2,4...
addVertex(&((*vertices)[i]));
}
for(i=last-1;i>=first;i-=2)
{ // ...5,3,1
addVertex(&((*vertices)[i]));
}
}
break;
case osg::PrimitiveSet::TRIANGLE_STRIP:
{
for( i=first;i<last;i+=2)
{// 0,2,4,...
addVertex(&((*vertices)[i]));
}
for(i=((last-first)%2)?(last-2):(last-1) ;i>first&& i<last;i-=2)
{
addVertex(&((*vertices)[i]));
}
}
break;
default: // lines, points, line_strip
{
for(i=first;i<last;++i, idx++)
{
addVertex(&((*vertices)[i]));
if (nperprim>0 && i<last-1 && idx%nperprim==nperprim-1) {
endContour();
beginContour();
}
}
}
break;
}
endContour();
}
void Tessellatord::addContour(osg::PrimitiveSet* primitive, VertexArray*
vertices)
{
// adds a single primitive as a contour.
unsigned int nperprim=0; // number of vertices per primitive
if (primitive->getMode()==osg::PrimitiveSet::QUADS) nperprim=4;
if (primitive->getMode()==osg::PrimitiveSet::TRIANGLES) nperprim=3;
unsigned int idx=0;
switch(primitive->getType())
{
case(osg::PrimitiveSet::DrawArraysPrimitiveType):
{
osg::DrawArrays* drawArray =
static_cast<osg::DrawArrays*>(primitive);
unsigned int first = drawArray->getFirst();
unsigned int last = first+drawArray->getCount();
addContour(primitive->getMode(),first,last,vertices);
break;
}
case(osg::PrimitiveSet::DrawElementsUBytePrimitiveType):
{
beginContour();
osg::DrawElementsUByte* drawElements =
static_cast<osg::DrawElementsUByte*>(primitive);
for(osg::DrawElementsUByte::iterator indexItr=drawElements->begin();
indexItr!=drawElements->end();
++indexItr, idx++)
{
addVertex(&((*vertices)[*indexItr]));
if (nperprim>0 && indexItr!=drawElements->end() &&
idx%nperprim==nperprim-1) {
endContour();
beginContour();
}
}
endContour();
break;
}
case(osg::PrimitiveSet::DrawElementsUShortPrimitiveType):
{
beginContour();
osg::DrawElementsUShort* drawElements =
static_cast<osg::DrawElementsUShort*>(primitive);
for(osg::DrawElementsUShort::iterator
indexItr=drawElements->begin();
indexItr!=drawElements->end();
++indexItr, idx++)
{
addVertex(&((*vertices)[*indexItr]));
if (nperprim>0 && indexItr!=drawElements->end() &&
idx%nperprim==nperprim-1) {
endContour();
beginContour();
}
}
endContour();
break;
}
case(osg::PrimitiveSet::DrawElementsUIntPrimitiveType):
{
beginContour();
osg::DrawElementsUInt* drawElements =
static_cast<osg::DrawElementsUInt*>(primitive);
for(osg::DrawElementsUInt::iterator indexItr=drawElements->begin();
indexItr!=drawElements->end();
++indexItr, idx++)
{
addVertex(&((*vertices)[*indexItr]));
if (nperprim>0 && indexItr!=drawElements->end() &&
idx%nperprim==nperprim-1) {
endContour();
beginContour();
}
}
endContour();
break;
}
default:
osg::notify(osg::NOTICE)<<"Tessellatord::addContour(primitive,
vertices) : Primitive type "<<primitive->getType()<<" not handled"<<std::endl;
break;
}
}
void Tessellatord::handleNewVertices(osg::Geometry& geom,VertexPtrToIndexMap
&vertexPtrToIndexMap)
{
if (!_newVertexList.empty())
{
VertexArray* vertices =
dynamic_cast<VertexArray*>(geom.getVertexArray());
osg::Vec3Array* normals = NULL;
if (geom.getNormalBinding()==osg::Geometry::BIND_PER_VERTEX)
{
normals = dynamic_cast<osg::Vec3Array*>(geom.getNormalArray());
}
typedef std::vector<osg::Array*> ArrayList;
ArrayList arrays;
if (geom.getColorBinding()==osg::Geometry::BIND_PER_VERTEX)
{
arrays.push_back(geom.getColorArray());
}
if (geom.getSecondaryColorBinding()==osg::Geometry::BIND_PER_VERTEX)
{
arrays.push_back(geom.getSecondaryColorArray());
}
if (geom.getFogCoordBinding()==osg::Geometry::BIND_PER_VERTEX)
{
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);
Vertex* 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 Tessellatord::begin(GLenum mode)
{
_primList.push_back(new Prim(mode));
}
void Tessellatord::vertex(Vertex* vertex)
{
if (!_primList.empty())
{
Prim* prim = _primList.back().get();
prim->_vertices.push_back(vertex);
}
}
void Tessellatord::combine(Vertex* vertex,void* vertex_data[4],GLfloat
weight[4])
{
_newVertexList.push_back(NewVertex(vertex,
weight[0],(Vertex*)vertex_data[0],
weight[1],(Vertex*)vertex_data[1],
weight[2],(Vertex*)vertex_data[2],
weight[3],(Vertex*)vertex_data[3]));
}
void Tessellatord::end()
{
// no need to do anything right now...
}
void Tessellatord::error(GLenum errorCode)
{
_errorCode = errorCode;
}
void CALLBACK Tessellatord::beginCallback(GLenum which, void* userData)
{
((Tessellatord*)userData)->begin(which);
}
void CALLBACK Tessellatord::endCallback(void* userData)
{
((Tessellatord*)userData)->end();
}
void CALLBACK Tessellatord::vertexCallback(GLvoid *data, void* userData)
{
((Tessellatord*)userData)->vertex((Vertex*)data);
}
void CALLBACK Tessellatord::combineCallback(GLdouble coords[3], void*
vertex_data[4],
GLfloat weight[4], void** outData,
void* userData)
{
Vertex* newData = new Vertex(coords[0],coords[1],coords[2]);
*outData = newData;
((Tessellatord*)userData)->combine(newData,vertex_data,weight);
}
void CALLBACK Tessellatord::errorCallback(GLenum errorCode, void* userData)
{
((Tessellatord*)userData)->error(errorCode);
}
void Tessellatord::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;
osg::Vec2dArray* v2darr = NULL;
osg::Vec3dArray* v3darr = NULL;
osg::Vec4dArray* v4darr = 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;
case osg::Array::Vec2dArrayType: {
v2darr = dynamic_cast<osg::Vec2dArray*>(cold);
osg::Vec2dArray::iterator itr=v2darr->begin()+nnu;
(*v2darr).erase(itr, v2darr->end());
}
break;
case osg::Array::Vec3dArrayType: {
v3darr = dynamic_cast<osg::Vec3dArray*>(cold);
osg::Vec3dArray::iterator itr=v3darr->begin()+nnu;
(*v3darr).erase(itr, v3darr->end());
}
break;
case osg::Array::Vec4dArrayType: {
v4darr = dynamic_cast<osg::Vec4dArray*>(cold);
osg::Vec4dArray::iterator itr=v4darr->begin()+nnu;
(*v4darr).erase(itr, v4darr->end());
}
break;
default: // should also handle:ArrayType' ByteArrayType'
ShortArrayType' IntArrayType'
// `UShortArrayType' `UIntArrayType' `Vec4ubArrayType'
`FloatArrayType'
break;
}
}
}
void Tessellatord::collectTessellation(osg::Geometry &geom, unsigned int
originalIndex)
{
VertexArray* vertices = dynamic_cast<VertexArray*>(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::notify(osg::WARN)<<"Add: "<< iprim <<
std::endl;
}
iprim++; // GWM Sep 2002 count which normal we should use
}
}
}
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