719 lines
26 KiB
C++
719 lines
26 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 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/Tesselator>
|
|
|
|
using namespace osg;
|
|
using namespace osgUtil;
|
|
|
|
|
|
Tesselator::Tesselator() :
|
|
_wtype(TESS_WINDING_ODD),
|
|
_ttype(TESS_TYPE_POLYGONS),
|
|
_boundaryOnly(false), _numberVerts(0)
|
|
{
|
|
_tobj = 0;
|
|
_errorCode = 0;
|
|
_index=0;
|
|
}
|
|
|
|
Tesselator::~Tesselator()
|
|
{
|
|
reset();
|
|
}
|
|
|
|
void Tesselator::beginTesselation()
|
|
{
|
|
reset();
|
|
|
|
if (!_tobj) _tobj = gluNewTess();
|
|
|
|
gluTessCallback(_tobj, GLU_TESS_VERTEX_DATA, (GLvoid (CALLBACK*)()) vertexCallback);
|
|
gluTessCallback(_tobj, GLU_TESS_BEGIN_DATA, (GLvoid (CALLBACK*)()) beginCallback);
|
|
gluTessCallback(_tobj, GLU_TESS_END_DATA, (GLvoid (CALLBACK*)()) endCallback);
|
|
gluTessCallback(_tobj, GLU_TESS_COMBINE_DATA,(GLvoid (CALLBACK*)()) combineCallback);
|
|
gluTessCallback(_tobj, GLU_TESS_ERROR_DATA, (GLvoid (CALLBACK*)()) errorCallback);
|
|
|
|
gluTessBeginPolygon(_tobj,this);
|
|
}
|
|
|
|
void Tesselator::beginContour()
|
|
{
|
|
if (_tobj)
|
|
{
|
|
gluTessBeginContour(_tobj);
|
|
}
|
|
}
|
|
|
|
void Tesselator::addVertex(osg::Vec3* vertex)
|
|
{
|
|
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);
|
|
}
|
|
}
|
|
|
|
void Tesselator::endContour()
|
|
{
|
|
if (_tobj)
|
|
{
|
|
gluTessEndContour(_tobj);
|
|
}
|
|
}
|
|
|
|
void Tesselator::endTesselation()
|
|
{
|
|
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;
|
|
}
|
|
}
|
|
}
|
|
|
|
void Tesselator::reset()
|
|
{
|
|
if (_tobj)
|
|
{
|
|
gluDeleteTess(_tobj);
|
|
_tobj = 0;
|
|
}
|
|
for (Vec3dList::iterator i = _coordData.begin(); i != _coordData.end(); ++i) {
|
|
delete (*i);
|
|
}
|
|
_coordData.clear();
|
|
_newVertexList.clear();
|
|
_primList.clear();
|
|
_errorCode = 0;
|
|
}
|
|
|
|
class InsertNewVertices : public osg::ArrayVisitor
|
|
{
|
|
public:
|
|
|
|
float _f1,_f2,_f3,_f4;
|
|
unsigned int _i1,_i2,_i3,_i4;
|
|
|
|
InsertNewVertices(float f1,unsigned int i1,
|
|
float f2,unsigned int i2,
|
|
float f3,unsigned int i3,
|
|
float 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::UByte4Array& ba) { apply_imp(ba,UByte4()); }
|
|
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()); }
|
|
|
|
};
|
|
|
|
void Tesselator::retesselatePolygons(osg::Geometry &geom)
|
|
{
|
|
// turn the contour list into primitives, a little like tesselator 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 tesselator
|
|
// the reset is needed by the flt loader which reuses a tesselator for triangulating polygons.
|
|
// as such it might be reset by other loaders/developers in future.
|
|
_index=0; // reset the counter for indexed vertices
|
|
if (!_numberVerts) {
|
|
_numberVerts=geom.getVertexArray()->getNumElements();
|
|
// save the contours for complex (winding rule) tesselations
|
|
_Contours=geom.getPrimitiveSetList();
|
|
}
|
|
|
|
// now cut out vertex attributes added on any previous tesselation
|
|
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::tesselator for Geometry sets of multiple contours is that the begin/end tesselation
|
|
// occurs around the whole set of contours.
|
|
if (_ttype==TESS_TYPE_GEOMETRY) {
|
|
beginTesselation();
|
|
gluTessProperty(_tobj, GLU_TESS_WINDING_RULE, _wtype);
|
|
gluTessProperty(_tobj, GLU_TESS_BOUNDARY_ONLY , _boundaryOnly);
|
|
}
|
|
// process all the contours into the tesselator
|
|
int noContours = _Contours.size();
|
|
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) {
|
|
if (primitive->getMode()==osg::PrimitiveSet::POLYGON ||_ttype==TESS_TYPE_DRAWABLE) {
|
|
beginTesselation();
|
|
addContour(primitive.get(), vertices);
|
|
endTesselation();
|
|
|
|
collectTesselation(geom);
|
|
} else { // copy the contour primitive as it is not being tesselated
|
|
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 tesselated
|
|
// in this case points, lines or line_strip
|
|
geom.addPrimitiveSet(primitive.get());
|
|
}
|
|
}
|
|
}
|
|
if (_ttype==TESS_TYPE_GEOMETRY) {
|
|
endTesselation();
|
|
|
|
collectTesselation(geom);
|
|
}
|
|
}
|
|
|
|
void Tesselator::addContour(osg::PrimitiveSet* primitive, osg::Vec3Array* vertices)
|
|
{
|
|
// adds a single primitive as a contour.
|
|
beginContour();
|
|
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):
|
|
{
|
|
unsigned int i;
|
|
osg::DrawArrays* drawArray = static_cast<osg::DrawArrays*>(primitive);
|
|
unsigned int first = drawArray->getFirst();
|
|
unsigned int last = first+drawArray->getCount();
|
|
|
|
switch (primitive->getMode()) {
|
|
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;
|
|
}
|
|
break;
|
|
}
|
|
case(osg::PrimitiveSet::DrawElementsUBytePrimitiveType):
|
|
{
|
|
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();
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case(osg::PrimitiveSet::DrawElementsUShortPrimitiveType):
|
|
{
|
|
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();
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case(osg::PrimitiveSet::DrawElementsUIntPrimitiveType):
|
|
{
|
|
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();
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
|
|
endContour();
|
|
}
|
|
|
|
void Tesselator::handleNewVertices(osg::Geometry& geom,VertexPtrToIndexMap &vertexPtrToIndexMap)
|
|
{
|
|
if (!_newVertexList.empty())
|
|
{
|
|
|
|
osg::Vec3Array* vertices = dynamic_cast<osg::Vec3Array*>(geom.getVertexArray());
|
|
osg::Vec3Array* normals = NULL;
|
|
if (geom.getNormalBinding()==osg::Geometry::BIND_PER_VERTEX)
|
|
{
|
|
normals = 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::ArrayList& tcal = geom.getTexCoordArrayList();
|
|
for(osg::Geometry::ArrayList::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 Tesselator::begin(GLenum mode)
|
|
{
|
|
_primList.push_back(new Prim(mode));
|
|
}
|
|
|
|
void Tesselator::vertex(osg::Vec3* vertex)
|
|
{
|
|
if (!_primList.empty())
|
|
{
|
|
Prim* prim = _primList.back().get();
|
|
prim->_vertices.push_back(vertex);
|
|
|
|
}
|
|
}
|
|
|
|
void Tesselator::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 Tesselator::end()
|
|
{
|
|
// no need to do anything right now...
|
|
}
|
|
|
|
void Tesselator::error(GLenum errorCode)
|
|
{
|
|
_errorCode = errorCode;
|
|
}
|
|
|
|
void CALLBACK Tesselator::beginCallback(GLenum which, void* userData)
|
|
{
|
|
((Tesselator*)userData)->begin(which);
|
|
}
|
|
|
|
void CALLBACK Tesselator::endCallback(void* userData)
|
|
{
|
|
((Tesselator*)userData)->end();
|
|
}
|
|
|
|
void CALLBACK Tesselator::vertexCallback(GLvoid *data, void* userData)
|
|
{
|
|
((Tesselator*)userData)->vertex((Vec3*)data);
|
|
}
|
|
|
|
void CALLBACK Tesselator::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;
|
|
((Tesselator*)userData)->combine(newData,vertex_data,weight);
|
|
}
|
|
|
|
void CALLBACK Tesselator::errorCallback(GLenum errorCode, void* userData)
|
|
{
|
|
((Tesselator*)userData)->error(errorCode);
|
|
}
|
|
|
|
void Tesselator::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' `UByte4ArrayType' `FloatArrayType'
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
unsigned int _computeNumberOfPrimitives(const osg::Geometry& geom)
|
|
{
|
|
|
|
unsigned int totalNumberOfPrimitives = 0;
|
|
|
|
for(Geometry::PrimitiveSetList::const_iterator itr=geom.getPrimitiveSetList().begin();
|
|
itr!=geom.getPrimitiveSetList().end();
|
|
++itr)
|
|
{
|
|
const PrimitiveSet* primitiveset = itr->get();
|
|
GLenum mode=primitiveset->getMode();
|
|
|
|
unsigned int primLength;
|
|
switch(mode)
|
|
{
|
|
case(GL_POINTS): primLength=1; break;
|
|
case(GL_LINES): primLength=2; break;
|
|
case(GL_TRIANGLES): primLength=3; break;
|
|
case(GL_QUADS): primLength=4; break;
|
|
default: primLength=0; break; // compute later when =0.
|
|
}
|
|
|
|
// draw primtives by the more flexible "slow" path,
|
|
// sending OpenGL glBegin/glVertex.../glEnd().
|
|
switch(primitiveset->getType())
|
|
{
|
|
case(PrimitiveSet::DrawArrayLengthsPrimitiveType):
|
|
{
|
|
|
|
const DrawArrayLengths* drawArrayLengths = static_cast<const DrawArrayLengths*>(primitiveset);
|
|
for(DrawArrayLengths::const_iterator primItr=drawArrayLengths->begin();
|
|
primItr!=drawArrayLengths->end();
|
|
++primItr)
|
|
{
|
|
if (primLength==0) totalNumberOfPrimitives += 1;
|
|
else totalNumberOfPrimitives += *primItr/primLength; // Dec 2003 - increment not set
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
{
|
|
if (primLength==0) totalNumberOfPrimitives += 1;
|
|
else totalNumberOfPrimitives += primitiveset->getNumIndices()/primLength;
|
|
}
|
|
}
|
|
}
|
|
|
|
return totalNumberOfPrimitives;
|
|
}
|
|
//
|
|
void Tesselator::collectTesselation(osg::Geometry &geom)
|
|
{
|
|
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 = 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 tesselated 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();
|
|
|
|
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);
|
|
if (primItr==_primList.begin())
|
|
{ // first primitive so collect primitive normal & colour.
|
|
if (normals) {
|
|
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>=cols4->size()) {
|
|
cols3->push_back(primCol3); // GWM Dec 2003 add flat shaded colour for new facet
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{ // later primitives use same colour
|
|
if (normals) 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) {
|
|
int ntris=elements->getNumIndices()/3;
|
|
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
|
|
}
|
|
}
|
|
}
|