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From Geoff Michel, added tesselate pass to Optimizer and added handling of per

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primitve color to osgUtil::Tesselator.
This commit is contained in:
Robert Osfield
2003-12-27 13:46:33 +00:00
parent 2cb360dd38
commit 884e046abb
2 changed files with 70 additions and 4 deletions
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45
src/osgUtil/Tesselator.cpp
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@@ -320,7 +320,7 @@ void Tesselator::retesselatePolygons(osg::Geometry& geom)
}
// we don't properly handle per primitive and per primitive bindings yet
// 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
@@ -330,6 +330,28 @@ void Tesselator::retesselatePolygons(osg::Geometry& geom)
{
normals = geom.getNormalArray(); // GWM Sep 2002
}
// GWM Dec 2003 - nneded 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;
}
}
// 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)
@@ -346,18 +368,33 @@ void Tesselator::retesselatePolygons(osg::Geometry& geom)
}
if (primItr==_primList.begin())
{
// first new primitive so overwrite the previous polygon.
{ // first new primitive so overwrite the previous polygon & collect primitive normal & colour.
geom.getPrimitiveSetList()[primNo] = elements;
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 (cols3) {
primCol3=(*cols3)[iprim]; // GWM Dec 2003 flat shaded rgb colour
}
}
else
{
// subsequence primitives add to the back of the primitive list.
// subsequent primitives add to the back of the primitive list, and may have same colour as hte original facet.
geom.addPrimitiveSet(elements);
if (normals) normals->push_back(norm); // GWM Sep 2002 add flat shaded normal for new facet
if (cols4) cols4->push_back(primCol4); // GWM Dec 2003 add flat shaded colour for new facet
if (cols3) cols3->push_back(primCol3); // GWM Dec 2003 add flat shaded colour for new facet
if (prim->_mode==GL_TRIANGLES) { // also need one per triangle?
int ntris=elements->getNumIndices()/3;
for (int ii=1; ii<ntris; ii++) {
if (normals) normals->push_back(norm); // GWM Sep 2002 add flat shaded normal for new facet
if (cols4) cols4->push_back(primCol4);
}
}
// osg::notify(osg::WARN)<<"Add: "<< iprim << std::endl;
}
iprim++; // GWM Sep 2002 count which normal we should use
}