FGFS-4.1/OpenSceneGraph
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Implemented --single command line option that creates a single osg::DrawElementsUInt primitive set instead of using MultiDrawIndirect.

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This commit is contained in:
Robert Osfield
2017-10-19 12:39:22 +01:00
parent 4791e5f6b5
commit 8965c9369e
1 changed files with 52 additions and 13 deletions
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65
examples/osgsimpleMDI/osgsimpleMDI.cpp
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@@ -69,10 +69,24 @@ int main( int argc, char**argv )
arguments.read("--numX",MAXX);
arguments.read("--numY",MAXY);
bool MDIenable=true;
enum PrimtiveSetUsage
{
MultiDraw,
MultiplePrimitiveSets,
SinglePrimitiveSet
};
PrimtiveSetUsage usage = MultiDraw;
if(arguments.read("--classic"))
{ MDIenable=false;
OSG_WARN<<"disabling MDI"<<std::endl;
{
usage = MultiplePrimitiveSets;
OSG_WARN<<"disabling MDI, using multiple PrimitiveSet"<<std::endl;
}
if(arguments.read("--single"))
{
usage = SinglePrimitiveSet;
OSG_WARN<<"disabling MDI, using single PrimitiveSet"<<std::endl;
}
osg::Geode* root( new osg::Geode );
@@ -127,18 +141,43 @@ int main( int argc, char**argv )
geom->setVertexArray(verts);
if(MDIenable)
switch(usage)
{
geom->addPrimitiveSet(mdi);
} else
{
for(int i=0; i<MAXY*MAXX; ++i)
case(MultiDraw):
{
osg::DrawElementsUInt *dre=new osg::DrawElementsUInt(osg::PrimitiveSet::TRIANGLE_STRIP,4,myIndicesUI) ;
dre->setElementBufferObject(ebo.get());
geom->addPrimitiveSet(dre);
for(int z=0; z<4; z++)myIndicesUI[z]+=4;
geom->addPrimitiveSet(mdi);
break;
}
case(MultiplePrimitiveSets):
{
for(int i=0; i<MAXY*MAXX; ++i)
{
osg::ref_ptr<osg::DrawElementsUInt> dre = new osg::DrawElementsUInt(osg::PrimitiveSet::TRIANGLE_STRIP,4,myIndicesUI);
dre->setElementBufferObject(ebo.get());
geom->addPrimitiveSet(dre.get());
for(int z=0; z<4; z++) myIndicesUI[z]+=4;
}
break;
}
case(SinglePrimitiveSet):
{
osg::ref_ptr<osg::DrawElementsUInt> primitives = new osg::DrawElementsUInt(GL_TRIANGLES);
primitives->setElementBufferObject(ebo.get());
geom->addPrimitiveSet(primitives.get());
unsigned int vi = 0;
for(int i=0; i<MAXY*MAXX; ++i)
{
primitives->push_back(vi);
primitives->push_back(vi+2);
primitives->push_back(vi+1);
primitives->push_back(vi+1);
primitives->push_back(vi+2);
primitives->push_back(vi+3);
vi += 4;
}
break;
}
}