bool PtexViewer::loadFile(std::string filename, int face)
{
Ptex::String ptexError;
PtexPtr<PtexTexture> r(PtexTexture::open(filename.c_str(), ptexError, true));
_quads = true;
if (!r)
{
fprintf(stderr,"%s\n",ptexError.c_str());
return false;
}
if (face>=r->numFaces())
{
std::cerr << "Invalid face ID requested" << std::endl;
return false;
}
removeSceneData();
_numFaces = r->numFaces();
_typeStr = Ptex::DataTypeName(r->dataType());
_quads = r->meshType()==Ptex::mt_quad;
_mode3d = false;
_envCube = false;
if (_enable3D && r->numFaces()==6 && face<0)
{
// Test for environment cube case
_envCube = true;
int adjfaces[6][4] = {
{ 3, 5, 2, 4 }, // px
{ 3, 4, 2, 5 }, // nx
{ 4, 0, 5, 1 }, // py
{ 5, 0, 4, 1 }, // ny
{ 3, 0, 2, 1 }, // pz
{ 3, 1, 2, 0 } // nz
};
int fi = 0;
while (fi<6 && _envCube)
{
const Ptex::FaceInfo& f = r->getFaceInfo(fi);
for (int v=0; v<4; v++)
if (f.adjfaces[v]!=adjfaces[fi][v]) _envCube = false;
fi++;
}
}
if (_envCube)
{
// Construct environment cube geometry
float cubeVerts[8][3] = {
{-1,-1,-1}, {1,-1,-1}, {1,-1, 1}, {-1,-1, 1},
{-1, 1,-1}, {1, 1,-1}, {1, 1, 1}, {-1, 1, 1} };
int cubeInds[6][4] = {
{2,1,5,6}, {0,3,7,4},
{7,6,5,4}, {0,1,2,3},
{3,2,6,7}, {1,0,4,5} };
for (int i=0; i<8; i++) _geometry.addVertex(cubeVerts[i]);
for (int fi=0; fi<6; fi++)
{
const Ptex::FaceInfo& f = r->getFaceInfo(fi);
polygon q;
for (int v=0; v<4; v++) q.indices[v] = cubeInds[fi][v];
q.ures = f.res.u();
q.vres = f.res.v();
_geometry.addFace(q);
}
_mode3d = true;
}
else
{
if (_enable3D) _mode3d = _geometry.loadFromMetaData(r);
if (_geometry.empty()) _geometry.makeFlatGeom(r);
for (int fi=0; fi<r->numFaces(); fi++)
{
polygon* q = _geometry.getFace(fi);
if (!q) continue;
const Ptex::FaceInfo& f = r->getFaceInfo(fi);
q->ures = f.res.u();
q->vres = f.res.v();
}
}
_geometry.makePages(r);
computeBounds();
return true;
}
