void
createDAIGeometry( osg::Geometry& geom, int nInstances=1 )
{
const float halfDimX( .5 );
const float halfDimZ( .5 );
osg::Vec3Array* v = new osg::Vec3Array;
v->resize( 4 );
geom.setVertexArray( v );
// Geometry for a single quad.
(*v)[ 0 ] = osg::Vec3( -halfDimX, 0., -halfDimZ );
(*v)[ 1 ] = osg::Vec3( halfDimX, 0., -halfDimZ );
(*v)[ 2 ] = osg::Vec3( halfDimX, 0., halfDimZ );
(*v)[ 3 ] = osg::Vec3( -halfDimX, 0., halfDimZ );
// Use the DrawArraysInstanced PrimitiveSet and tell it to draw 1024 instances.
geom.addPrimitiveSet( new osg::DrawArrays( GL_QUADS, 0, 4, nInstances ) );
}
void createFaces(osg::Geometry& geometry, Polyhedron const& polyhedron, unsigned int faceMask = PolyhedronGeometry::All)
{
osgUtil::Tessellator tessellator;
tessellator.setTessellationType(osgUtil::Tessellator::TESS_TYPE_POLYGONS);
tessellator.setWindingType(osgUtil::Tessellator::TESS_WINDING_NONZERO);
auto _vertices = getOrCreateVertexArray(geometry);
auto _normals = getOrCreateNormalArray(geometry);
auto _colors = getOrCreateColorArray(geometry);
osg::ref_ptr<osg::Vec3Array> vertices = createVertexArray(polyhedron);
VertexIndexArrays polygons = createVertexIndexArrays(polyhedron);
for (auto const& polygon: polygons)
{
assert(polygon && polygon->size() >= 3);
if (!(faceMask & PolyhedronGeometry::FaceMaskFromSides(polygon->size()))) continue;
auto first = _vertices->size();
auto count = polygon->size();
auto normal = detail::calculateNormal(vertices, polygon);
auto color = detail::calculateColor(vertices, polygon);
for (auto i = 0u; i < polygon->size(); ++i)
{
auto vertex = vertices->at(polygon->at(i));
_vertices->push_back(vertex);
_normals->push_back(normal);
_colors->push_back(color);
}
geometry.addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::POLYGON, first, count));
}
tessellator.retessellatePolygons(geometry);
}
void createDAIGeometry( osg::Geometry& geom, int nInstances=1 )
{
const float halfDimX( .5 );
const float halfDimZ( .5 );
osg::Vec3Array* v = new osg::Vec3Array;
v->resize( 4 );
geom.setVertexArray( v );
// Geometry for a single quad.
(*v)[ 0 ] = osg::Vec3( -halfDimX, 0., 0. );
(*v)[ 1 ] = osg::Vec3( halfDimX, 0., 0. );
(*v)[ 2 ] = osg::Vec3( halfDimX, 0., halfDimZ*2.0f );
(*v)[ 3 ] = osg::Vec3( -halfDimX, 0., halfDimZ*2.0f );
// create color array data (each corner of our triangle will have one color component)
osg::Vec4Array* pColors = new osg::Vec4Array;
pColors->push_back( osg::Vec4( 1.0f, 0.0f, 0.0f, 1.0f ) );
pColors->push_back( osg::Vec4( 0.0f, 1.0f, 0.0f, 1.0f ) );
pColors->push_back( osg::Vec4( 0.0f, 0.0f, 1.0f, 1.0f ) );
pColors->push_back( osg::Vec4( 0.0f, 0.0f, 1.0f, 1.0f ) );
geom.setColorArray( pColors );
// make sure that our geometry is using one color per vertex
geom.setColorBinding( osg::Geometry::BIND_PER_VERTEX );
osg::Vec2Array* pTexCoords = new osg::Vec2Array( 4 );
(*pTexCoords)[0].set( 0.0f, 0.0f );
(*pTexCoords)[1].set( 1.0f, 0.0f );
(*pTexCoords)[2].set( 1.0f, 1.0f );
(*pTexCoords)[3].set( 0.0f, 1.0f );
geom.setTexCoordArray( 0, pTexCoords );
// Use the DrawArraysInstanced PrimitiveSet and tell it to draw 1024 instances.
geom.addPrimitiveSet( new osg::DrawArrays( GL_QUADS, 0, 4, nInstances ) );
}
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;
}
bool Primitive_readLocalData(Input& fr,osg::Geometry& geom)
{
bool iteratorAdvanced = false;
bool firstMatched = false;
if ((firstMatched = fr.matchSequence("DrawArrays %w %i %i %i")) ||
fr.matchSequence("DrawArrays %w %i %i") )
{
GLenum mode;
Geometry_matchPrimitiveModeStr(fr[1].getStr(),mode);
int first;
fr[2].getInt(first);
int count;
fr[3].getInt(count);
int numInstances = 0;
if (firstMatched)
{
fr[4].getInt(numInstances);
fr += 5;
}
else
{
fr += 4;
}
geom.addPrimitiveSet(new DrawArrays(mode, first, count, numInstances));
iteratorAdvanced = true;
}
else if ((firstMatched = fr.matchSequence("DrawArrayLengths %w %i %i %i {")) ||
fr.matchSequence("DrawArrayLengths %w %i %i {") )
{
int entry = fr[1].getNoNestedBrackets();
GLenum mode;
Geometry_matchPrimitiveModeStr(fr[1].getStr(),mode);
int first;
fr[2].getInt(first);
int capacity;
fr[3].getInt(capacity);
int numInstances = 0;
if (firstMatched)
{
fr[4].getInt(numInstances);
fr += 6;
}
else
{
fr += 5;
}
DrawArrayLengths* prim = new DrawArrayLengths;
prim->setMode(mode);
prim->setNumInstances(numInstances);
prim->setFirst(first);
prim->reserve(capacity);
while (!fr.eof() && fr[0].getNoNestedBrackets()>entry)
{
unsigned int i;
if (fr[0].getUInt(i))
{
prim->push_back(i);
++fr;
}
}
++fr;
geom.addPrimitiveSet(prim);
iteratorAdvanced = true;
}
else if ((firstMatched = fr.matchSequence("DrawElementsUByte %w %i %i {")) ||
fr.matchSequence("DrawElementsUByte %w %i {"))
{
int entry = fr[1].getNoNestedBrackets();
GLenum mode;
Geometry_matchPrimitiveModeStr(fr[1].getStr(),mode);
int capacity;
fr[2].getInt(capacity);
int numInstances = 0;
if (firstMatched)
{
fr[3].getInt(numInstances);
fr += 5;
}
else
{
fr += 4;
}
DrawElementsUByte* prim = new DrawElementsUByte;
prim->setMode(mode);
prim->setNumInstances(numInstances);
prim->reserve(capacity);
while (!fr.eof() && fr[0].getNoNestedBrackets()>entry)
{
unsigned int i;
if (fr[0].getUInt(i))
{
prim->push_back(i);
++fr;
}
}
++fr;
geom.addPrimitiveSet(prim);
iteratorAdvanced = true;
}
else if ((firstMatched = fr.matchSequence("DrawElementsUShort %w %i %i {")) ||
fr.matchSequence("DrawElementsUShort %w %i {"))
{
int entry = fr[1].getNoNestedBrackets();
GLenum mode;
Geometry_matchPrimitiveModeStr(fr[1].getStr(),mode);
int capacity;
fr[2].getInt(capacity);
int numInstances = 0;
if (firstMatched)
{
fr[3].getInt(numInstances);
fr += 5;
}
else
{
fr += 4;
}
DrawElementsUShort* prim = new DrawElementsUShort;
prim->setMode(mode);
prim->setNumInstances(numInstances);
prim->reserve(capacity);
while (!fr.eof() && fr[0].getNoNestedBrackets()>entry)
{
unsigned int i;
if (fr[0].getUInt(i))
{
prim->push_back(i);
++fr;
}
}
++fr;
geom.addPrimitiveSet(prim);
iteratorAdvanced = true;
}
else if ((firstMatched = fr.matchSequence("DrawElementsUInt %w %i %i {")) ||
fr.matchSequence("DrawElementsUInt %w %i {"))
{
int entry = fr[1].getNoNestedBrackets();
GLenum mode;
Geometry_matchPrimitiveModeStr(fr[1].getStr(),mode);
int capacity;
fr[2].getInt(capacity);
int numInstances = 0;
if (firstMatched)
{
fr[3].getInt(numInstances);
fr += 5;
}
else
{
fr += 4;
}
DrawElementsUInt* prim = new DrawElementsUInt;
prim->setMode(mode);
prim->setNumInstances(numInstances);
prim->reserve(capacity);
while (!fr.eof() && fr[0].getNoNestedBrackets()>entry)
{
unsigned int i;
if (fr[0].getUInt(i))
{
prim->push_back(i);
++fr;
}
}
++fr;
geom.addPrimitiveSet(prim);
iteratorAdvanced = true;
}
return iteratorAdvanced;
}
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::notify(osg::WARN)<<"Add: "<< iprim << std::endl;
}
iprim++; // GWM Sep 2002 count which normal we should use
}
}
}
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
}
nave(int x,int y, int z, int tamaño)
{
pyramidGeode = new osg::Geode();
pyramidGeometry = new osg::Geometry();
pyramidGeode->addDrawable(pyramidGeometry);
osg::Vec3Array* pyramidVertices = new osg::Vec3Array;
//0-4
pyramidVertices->push_back( osg::Vec3( x, y, z) ); // front left
//1-5
pyramidVertices->push_back( osg::Vec3(tamaño+x, y, z) ); // front right
//2-6
pyramidVertices->push_back( osg::Vec3(tamaño+x,tamaño+y, z) ); // back right
//3-7
pyramidVertices->push_back( osg::Vec3( x,tamaño+y, z) ); // back left
//4-0
pyramidVertices->push_back( osg::Vec3( x, y,tamaño+z) ); // peak
//5-1
pyramidVertices->push_back( osg::Vec3(tamaño+x, y,tamaño+z) ); // front right
//6-2
pyramidVertices->push_back( osg::Vec3(tamaño+x,tamaño+y,tamaño+z) ); // back right
//7-3
pyramidVertices->push_back( osg::Vec3( x,tamaño+y,tamaño+z) ); // back left
pyramidGeometry->setVertexArray( pyramidVertices );
osg::DrawElementsUInt* pyramidBase =
new osg::DrawElementsUInt(osg::PrimitiveSet::QUADS, 0);
pyramidBase->push_back(3);
pyramidBase->push_back(2);
pyramidBase->push_back(1);
pyramidBase->push_back(0);
pyramidGeometry->addPrimitiveSet(pyramidBase);
osg::DrawElementsUInt* pyramidTop =
new osg::DrawElementsUInt(osg::PrimitiveSet::QUADS, 0);
pyramidTop->push_back(4);
pyramidTop->push_back(5);
pyramidTop->push_back(6);
pyramidTop->push_back(7);
pyramidGeometry->addPrimitiveSet(pyramidTop);
//Repeat the same for each of the four sides. Again, vertices are
//specified in counter-clockwise order.
osg::DrawElementsUInt* pyramidFaceOne =
new osg::DrawElementsUInt(osg::PrimitiveSet::QUADS, 0);
pyramidFaceOne->push_back(0);
pyramidFaceOne->push_back(1);
pyramidFaceOne->push_back(5);
pyramidFaceOne->push_back(4);
pyramidGeometry->addPrimitiveSet(pyramidFaceOne);
osg::DrawElementsUInt* pyramidFaceTwo =
new osg::DrawElementsUInt(osg::PrimitiveSet::QUADS, 0);
pyramidFaceTwo->push_back(1);
pyramidFaceTwo->push_back(2);
pyramidFaceTwo->push_back(6);
pyramidFaceTwo->push_back(5);
pyramidGeometry->addPrimitiveSet(pyramidFaceTwo);
osg::DrawElementsUInt* pyramidFaceThree =
new osg::DrawElementsUInt(osg::PrimitiveSet::QUADS, 0);
pyramidFaceThree->push_back(2);
pyramidFaceThree->push_back(3);
pyramidFaceThree->push_back(7);
pyramidFaceThree->push_back(6);
pyramidGeometry->addPrimitiveSet(pyramidFaceThree);
osg::DrawElementsUInt* pyramidFaceFour =
new osg::DrawElementsUInt(osg::PrimitiveSet::QUADS, 0);
pyramidFaceFour->push_back(3);
pyramidFaceFour->push_back(0);
pyramidFaceThree->push_back(4);
pyramidFaceFour->push_back(7);
pyramidGeometry->addPrimitiveSet(pyramidFaceFour);
//Declare and load an array of Vec4 elements to store colors.
osg::Vec4Array* colors = new osg::Vec4Array;
colors->push_back(osg::Vec4(0.0f, 0.0f, 0.0f, 1.0f) ); //index 0 red
colors->push_back(osg::Vec4(0.0f, 0.0f, 0.0f, 1.0f) ); //index 1 green
colors->push_back(osg::Vec4(0.0f, 0.0f, 0.0f, 1.0f) ); //index 2 blue
colors->push_back(osg::Vec4(0.0f, 0.0f, 0.0f, 1.0f) ); //index 3 white
colors->push_back(osg::Vec4(1.0f, 1.0f, 1.0f, 1.0f) ); //index 4 red
colors->push_back(osg::Vec4(1.0f, 1.0f, 1.0f, 1.0f) ); //index 4 red
colors->push_back(osg::Vec4(1.0f, 1.0f, 1.0f, 1.0f) ); //index 4 red
colors->push_back(osg::Vec4(1.0f, 1.0f, 1.0f, 1.0f) ); //index 4 red
//The next step is to associate the array of colors with the geometry,
//assign the color indices created above to the geometry and set the
//binding mode to _PER_VERTEX.
pyramidGeometry->setColorArray(colors);
pyramidGeometry->setColorBinding(osg::Geometry::BIND_PER_VERTEX);
};