NiTriStripsDataRef Exporter::makeTriStripsData(const TriStrips &strips)
{
NiTriStripsDataRef stripData = new NiTriStripsData();
if (strips.size() > 0)
{
stripData->SetStripCount(strips.size());
int i = 0;
TriStrips::const_iterator it;
for (it=strips.begin(); it!=strips.end(); ++it)
stripData->SetStrip(i++, *it);
}
return stripData;
}
void NiTriStripsData::SetTSTriangles( const vector<Triangle> & in ) {
if ( in.size() > 65535 || in.size() < 0 ) {
throw runtime_error("Invalid Triangle Count: must be between 0 and 65535.");
}
points.clear();
numTriangles = 0;
TriStrips strips;
triangle_stripper::indices idcs(in.size()*3);
size_t i, j;
for (i=0; i<in.size(); i++)
{
idcs[i * 3 + 0] = in[i][0];
idcs[i * 3 + 1] = in[i][1];
idcs[i * 3 + 2] = in[i][2];
}
tri_stripper stripper(idcs);
primitive_vector groups;
stripper.Strip(&groups);
// triangles left over
vector<Triangle> stris;
for (i=0; i<groups.size(); i++)
{
if (groups[i].Type == TRIANGLE_STRIP)
{
strips.push_back(TriStrip(groups[i].Indices.size()));
TriStrip &strip = strips.back();
for (j=0; j<groups[i].Indices.size(); j++)
strip[j] = groups[i].Indices[j];
} else
{
int size = stris.size();
stris.resize(size + groups[i].Indices.size()/3);
for (j=(size>0)?(size-1):0; j<stris.size(); j++)
{
stris[j][0] = groups[i].Indices[j*3+0];
stris[j][1] = groups[i].Indices[j*3+1];
stris[j][2] = groups[i].Indices[j*3+2];
}
}
}
if (stris.size())
{
// stitch em
TriStrip strip;
if (strips.size() > 0)
{
strip.push_back(strips.back()[strips.back().size()-1]);
strip.push_back(stris[0][0]);
}
for (i=0; i<stris.size(); i++)
{
if (i > 0)
{
strip.push_back(stris[i][0]);
strip.push_back(stris[i][0]);
}
strip.push_back(stris[i][0]);
strip.push_back(stris[i][1]);
strip.push_back(stris[i][2]);
if (i < stris.size()-1)
strip.push_back(stris[i][2]);
}
strips.push_back(strip);
}
if (strips.size() > 0)
{
SetStripCount(strips.size());
int i = 0;
TriStrips::const_iterator it;
for (it=strips.begin(); it!=strips.end(); ++it)
SetStrip(i++, *it);
}
//Recalculate Triangle Count
numTriangles = CalcTriangleCount();
}
