FGFS-4.1/OpenSceneGraph
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Fixed memory leak and utilised DrawArrayLengths in place of multiple

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DrawArray calls.
This commit is contained in:
Robert Osfield 2003-12-21 23:02:32 +00:00
parent fdd5a72115
commit f1d8a584d8
1 changed files with 17 additions and 33 deletions
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54
src/osgPlugins/txp/TrPageParser.cpp
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@ -402,61 +402,45 @@ void* geomRead::Parse(trpgToken /*tok*/,trpgReadBuffer &buf)
break;
case trpgGeometry::TriStrips:
{
// Need primitive lengths too
int* primitives = new int[numPrims];
geom.GetPrimLengths(primitives);
// Define Geomtry
geometry = new Geometry;
int first=0;
for(int i=0;i<numPrims;++i)
{
geometry->addPrimitiveSet(new DrawArrays(PrimitiveSet::TRIANGLE_STRIP,first,primitives[i]));
first += primitives[i];
}
geometry = new osg::Geometry;
osg::DrawArrayLengths* dal = new osg::DrawArrayLengths(osg::PrimitiveSet::TRIANGLE_STRIP,0,numPrims);
geom.GetPrimLengths(&(dal->front()));
geometry->addPrimitiveSet(dal);
}
break;
case trpgGeometry::TriFans:
{
// Need primitive lengths too
int* primitives = new int[numPrims];
geom.GetPrimLengths(primitives);
// create the trifan primitives.
geometry = new Geometry;
int first=0;
int i;
for(i=0;i<numPrims;++i)
{
geometry->addPrimitiveSet(new DrawArrays(PrimitiveSet::TRIANGLE_FAN,first,primitives[i]));
first += primitives[i];
}
geometry = new osg::Geometry;
osg::DrawArrayLengths* dal = new osg::DrawArrayLengths(osg::PrimitiveSet::TRIANGLE_FAN,0,numPrims);
geom.GetPrimLengths(&(dal->front()));
geometry->addPrimitiveSet(dal);
// Need to flip the fans coords.
int ind = 0;
int i;
for (i=0;i<numPrims;++i)
{
int length = (*dal)[i];
int start=ind+1;
int end=primitives[i]+ind-1;
int end=ind+length-1;
// Swap from start+1 to end
int numSwap = (end-start+1)/2;
// Swap vertices, texture coords & normals
for (int j=0; j < numSwap; j++ )
for (; start < end; ++start, --end )
{
std::swap((*vertices)[start], (*vertices)[end]);
for(int texno = 0; texno < num_tex; texno ++ )
{
if( tex_coords[texno] )
{
std::swap((*tex_coords[texno])[start], (*tex_coords[texno])[end]);
}
if(normals)
std::swap((*normals)[start], (*normals)[end]);
start++;
end--;
}
ind += primitives[i];
if(normals)
{
std::swap((*normals)[start], (*normals)[end]);
}
}
ind += length;
}
}
break;