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cf13a8d755
OpenSubdiv/regression/common/shape_utils.h
manuelk cf13a8d755 Add check in shape_utils that detects dicsonnected vertices in a shape mesh and exits with an error message. 
A more permanent fix will be to handle fully non-manifold topology at the Hbr level, but that is beyond the
scope of fixing this problem.

fixes #175
2013-06-13 16:22:59 -07:00

954 lines
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//
// Copyright (C) Pixar. All rights reserved.
//
// This license governs use of the accompanying software. If you
// use the software, you accept this license. If you do not accept
// the license, do not use the software.
//
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// "distribution" have the same meaning here as under U.S.
// copyright law. A "contribution" is the original software, or
// any additions or changes to the software.
// A "contributor" is any person or entity that distributes its
// contribution under this license.
// "Licensed patents" are a contributor's patent claims that read
// directly on its contribution.
//
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// including the license conditions and limitations in section 3,
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// royalty-free copyright license to reproduce its contribution,
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// dispose of its contribution in the software or derivative works
// of the contribution in the software.
//
// 3. Conditions and Limitations
// (A) No Trademark License- This license does not grant you
// rights to use any contributor's name, logo, or trademarks.
// (B) If you bring a patent claim against any contributor over
// patents that you claim are infringed by the software, your
// patent license from such contributor to the software ends
// automatically.
// (C) If you distribute any portion of the software, you must
// retain all copyright, patent, trademark, and attribution
// notices that are present in the software.
// (D) If you distribute any portion of the software in source
// code form, you may do so only under this license by including a
// complete copy of this license with your distribution. If you
// distribute any portion of the software in compiled or object
// code form, you may only do so under a license that complies
// with this license.
// (E) The software is licensed "as-is." You bear the risk of
// using it. The contributors give no express warranties,
// guarantees or conditions. You may have additional consumer
// rights under your local laws which this license cannot change.
// To the extent permitted under your local laws, the contributors
// exclude the implied warranties of merchantability, fitness for
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//
#ifndef SHAPE_UTILS_H
#define SHAPE_UTILS_H
#include <hbr/mesh.h>
#include <hbr/bilinear.h>
#include <hbr/loop.h>
#include <hbr/catmark.h>
#include <hbr/vertexEdit.h>
#include <hbr/cornerEdit.h>
#include <hbr/holeEdit.h>
#include <stdio.h>
#include <string.h>
#include <list>
#include <string>
#include <sstream>
#include <vector>
//------------------------------------------------------------------------------
static char const * sgets( char * s, int size, char ** stream ) {
for (int i=0; i<size; ++i) {
if ( (*stream)[i]=='\n' or (*stream)[i]=='\0') {
memcpy(s, *stream, i);
s[i]='\0';
if ((*stream)[i]=='\0')
return 0;
else {
(*stream) += i+1;
return s;
}
}
}
return 0;
}
//------------------------------------------------------------------------------
enum Scheme {
kBilinear,
kCatmark,
kLoop
};
//------------------------------------------------------------------------------
struct shape {
struct tag {
static tag * parseTag( char const * stream );
std::string genTag() const;
std::string name;
std::vector<int> intargs;
std::vector<float> floatargs;
std::vector<std::string> stringargs;
};
static shape * parseShape(char const * shapestr, int axis=1);
std::string genShape(char const * name) const;
std::string genObj(char const * name) const;
std::string genRIB() const;
~shape();
int getNverts() const { return (int)verts.size()/3; }
int getNfaces() const { return (int)nvertsPerFace.size(); }
bool hasUV() const { return not (uvs.empty() or faceuvs.empty()); }
std::vector<float> verts;
std::vector<float> uvs;
std::vector<float> normals;
std::vector<int> nvertsPerFace;
std::vector<int> faceverts;
std::vector<int> faceuvs;
std::vector<int> facenormals;
std::vector<tag *> tags;
Scheme scheme;
};
//------------------------------------------------------------------------------
shape::~shape() {
for (int i=0; i<(int)tags.size(); ++i)
delete tags[i];
}
//------------------------------------------------------------------------------
shape::tag * shape::tag::parseTag(char const * line) {
tag * t = 0;
const char* cp = &line[2];
char name[50];
while (*cp == ' ') cp++;
if (sscanf(cp, "%s", name )!=1) return t;
while (*cp && *cp != ' ') cp++;
int nints=0, nfloats=0, nstrings=0;
while (*cp == ' ') cp++;
if (sscanf(cp, "%d/%d/%d", &nints, &nfloats, &nstrings)!=3) return t;
while (*cp && *cp != ' ') cp++;
std::vector<int> intargs;
for (int i=0; i<nints; ++i) {
int val;
while (*cp == ' ') cp++;
if (sscanf(cp, "%d", &val)!=1) return t;
intargs.push_back(val);
while (*cp && *cp != ' ') cp++;
}
std::vector<float> floatargs;
for (int i=0; i<nfloats; ++i) {
float val;
while (*cp == ' ') cp++;
if (sscanf(cp, "%f", &val)!=1) return t;
floatargs.push_back(val);
while (*cp && *cp != ' ') cp++;
}
std::vector<std::string> stringargs;
for (int i=0; i<nstrings; ++i) {
char val[512];
while (*cp == ' ') cp++;
if (sscanf(cp, "%s", val)!=1) return t;
stringargs.push_back(val);
while (*cp && *cp != ' ') cp++;
}
t = new shape::tag;
t->name = name;
t->intargs = intargs;
t->floatargs = floatargs;
t->stringargs = stringargs;
return t;
}
//------------------------------------------------------------------------------
std::string shape::tag::genTag() const {
std::stringstream t;
t<<"\"t \""<<name<<"\" ";
t<<intargs.size()<<"/"<<floatargs.size()<<"/"<<stringargs.size()<<" ";
std::copy(intargs.begin(), intargs.end(), std::ostream_iterator<int>(t));
t<<" ";
std::copy(floatargs.begin(), floatargs.end(), std::ostream_iterator<float>(t));
t<<" ";
std::copy(stringargs.begin(), stringargs.end(), std::ostream_iterator<std::string>(t));
t<<"\\n\"\n";
return t.str();
}
//------------------------------------------------------------------------------
std::string shape::genShape(char const * name) const {
std::stringstream sh;
sh<<"static char const * "<<name<<" = \n";
for (int i=0; i<(int)verts.size(); i+=3)
sh << "\"v " << verts[i] << " " << verts[i+1] << " " << verts[i+2] <<"\\n\"\n";
for (int i=0; i<(int)uvs.size(); i+=2)
sh << "\"vt " << uvs[i] << " " << uvs[i+1] << "\\n\"\n";
for (int i=0; i<(int)normals.size(); i+=3)
sh << "\"vn " << normals[i] << " " << normals[i+1] << " " << normals[i+2] <<"\\n\"\n";
sh << "\"s off\\n\"\n";
for (int i=0, idx=0; i<(int)nvertsPerFace.size();++i) {
sh << "\"f ";
for (int j=0; j<nvertsPerFace[i];++j) {
int vert = faceverts[idx+j]+1,
uv = (int)faceuvs.size()>0 ? faceuvs[idx+j]+1 : vert,
normal = (int)facenormals.size()>0 ? facenormals[idx+j]+1 : vert;
sh << vert << "/" << uv << "/" << normal << " ";
}
sh << "\\n\"\n";
idx+=nvertsPerFace[i];
}
for (int i=0; i<(int)tags.size(); ++i)
sh << tags[i]->genTag();
return sh.str();
}
//------------------------------------------------------------------------------
std::string shape::genObj(char const * name) const {
std::stringstream sh;
sh<<"# This file uses centimeters as units for non-parametric coordinates.\n\n";
for (int i=0; i<(int)verts.size(); i+=3)
sh << "v " << verts[i] << " " << verts[i+1] << " " << verts[i+2] <<"\n";
for (int i=0; i<(int)uvs.size(); i+=2)
sh << "vt " << uvs[i] << " " << uvs[i+1] << "\n";
for (int i=0; i<(int)normals.size(); i+=3)
sh << "vn " << normals[i] << " " << normals[i+1] << " " << normals[i+2] <<"\n";
for (int i=0, idx=0; i<(int)nvertsPerFace.size();++i) {
sh << "f ";
for (int j=0; j<nvertsPerFace[i];++j) {
int vert = faceverts[idx+j]+1,
uv = (int)faceuvs.size()>0 ? faceuvs[idx+j]+1 : vert,
normal = (int)facenormals.size()>0 ? facenormals[idx+j]+1 : vert;
sh << vert << "/" << uv << "/" << normal << " ";
}
sh << "\n";
idx+=nvertsPerFace[i];
}
for (int i=0; i<(int)tags.size(); ++i)
sh << tags[i]->genTag();
return sh.str();
}
//------------------------------------------------------------------------------
std::string shape::genRIB() const {
std::stringstream rib;
rib << "HierarchicalSubdivisionMesh \"catmull-clark\" ";
rib << "[";
std::copy(nvertsPerFace.begin(), nvertsPerFace.end(), std::ostream_iterator<int>(rib));
rib << "] ";
rib << "[";
std::copy(faceverts.begin(), faceverts.end(), std::ostream_iterator<int>(rib));
rib << "] ";
std::stringstream names, nargs, intargs, floatargs, strargs;
for (int i=0; i<(int)tags.size();) {
tag * t = tags[i];
names << t->name;
nargs << t->intargs.size() << " " << t->floatargs.size() << " " << t->stringargs.size();
std::copy(t->intargs.begin(), t->intargs.end(), std::ostream_iterator<int>(intargs));
std::copy(t->floatargs.begin(), t->floatargs.end(), std::ostream_iterator<float>(floatargs));
std::copy(t->stringargs.begin(), t->stringargs.end(), std::ostream_iterator<std::string>(strargs));
if (++i<(int)tags.size()) {
names << " ";
nargs << " ";
intargs << " ";
floatargs << " ";
strargs << " ";
}
}
rib << "["<<names<<"] " << "["<<nargs<<"] " << "["<<intargs<<"] " << "["<<floatargs<<"] " << "["<<strargs<<"] ";
rib << "\"P\" [";
std::copy(verts.begin(), verts.end(), std::ostream_iterator<float>(rib));
rib << "] ";
return rib.str();
}
//------------------------------------------------------------------------------
shape * shape::parseShape(char const * shapestr, int axis ) {
shape * s = new shape;
char * str=const_cast<char *>(shapestr), line[256];
bool done = false;
while( not done )
{ done = sgets(line, sizeof(line), &str)==0;
char* end = &line[strlen(line)-1];
if (*end == '\n') *end = '\0'; // strip trailing nl
float x, y, z, u, v;
switch (line[0]) {
case 'v': switch (line[1])
{ case ' ': if(sscanf(line, "v %f %f %f", &x, &y, &z) == 3) {
s->verts.push_back(x);
switch( axis ) {
case 0 : s->verts.push_back(-z);
s->verts.push_back(y); break;
case 1 : s->verts.push_back(y);
s->verts.push_back(z); break;
}
} break;
case 't': if(sscanf(line, "vt %f %f", &u, &v) == 2) {
s->uvs.push_back(u);
s->uvs.push_back(v);
} break;
case 'n' : if(sscanf(line, "vn %f %f %f", &x, &y, &z) == 3) {
s->normals.push_back(x);
s->normals.push_back(y);
s->normals.push_back(z);
}
break; // skip normals for now
}
break;
case 'f': if(line[1] == ' ') {
int vi, ti, ni;
const char* cp = &line[2];
while (*cp == ' ') cp++;
int nverts = 0, nitems=0;
while( (nitems=sscanf(cp, "%d/%d/%d", &vi, &ti, &ni))>0) {
nverts++;
s->faceverts.push_back(vi-1);
if(nitems >= 1) s->faceuvs.push_back(ti-1);
if(nitems >= 2) s->facenormals.push_back(ni-1);
while (*cp && *cp != ' ') cp++;
while (*cp == ' ') cp++;
}
s->nvertsPerFace.push_back(nverts);
}
break;
case 't' : if(line[1] == ' ') {
shape::tag * t = tag::parseTag( line );
if (t)
s->tags.push_back(t);
} break;
}
}
return s;
}
//------------------------------------------------------------------------------
template <class T>
void applyTags( OpenSubdiv::HbrMesh<T> * mesh, shape const * sh ) {
for (int i=0; i<(int)sh->tags.size(); ++i) {
shape::tag * t = sh->tags[i];
if (t->name=="crease") {
for (int j=0; j<(int)t->intargs.size()-1; j += 2) {
OpenSubdiv::HbrVertex<T> * v = mesh->GetVertex( t->intargs[j] ),
* w = mesh->GetVertex( t->intargs[j+1] );
OpenSubdiv::HbrHalfedge<T> * e = 0;
if( v && w ) {
if((e = v->GetEdge(w)) == 0)
e = w->GetEdge(v);
if(e) {
int nfloat = (int) t->floatargs.size();
e->SetSharpness( std::max(0.0f, ((nfloat > 1) ? t->floatargs[j] : t->floatargs[0])) );
} else
printf("cannot find edge for crease tag (%d,%d)\n", t->intargs[j], t->intargs[j+1] );
}
}
} else if (t->name=="corner") {
for (int j=0; j<(int)t->intargs.size(); ++j) {
OpenSubdiv::HbrVertex<T> * v = mesh->GetVertex( t->intargs[j] );
if(v) {
int nfloat = (int) t->floatargs.size();
v->SetSharpness( std::max(0.0f, ((nfloat > 1) ? t->floatargs[j] : t->floatargs[0])) );
} else
printf("cannot find vertex for corner tag (%d)\n", t->intargs[j] );
}
} else if (t->name=="hole") {
for (int j=0; j<(int)t->intargs.size(); ++j) {
OpenSubdiv::HbrFace<T> * f = mesh->GetFace( t->intargs[j] );
if(f) {
f->SetHole();
} else
printf("cannot find face for hole tag (%d)\n", t->intargs[j] );
}
} else if (t->name=="interpolateboundary") {
if ((int)t->intargs.size()!=1) {
printf("expecting 1 integer for \"interpolateboundary\" tag n. %d\n", i);
continue;
}
switch( t->intargs[0] ) {
case 0 : mesh->SetInterpolateBoundaryMethod(OpenSubdiv::HbrMesh<T>::k_InterpolateBoundaryNone); break;
case 1 : mesh->SetInterpolateBoundaryMethod(OpenSubdiv::HbrMesh<T>::k_InterpolateBoundaryEdgeAndCorner); break;
case 2 : mesh->SetInterpolateBoundaryMethod(OpenSubdiv::HbrMesh<T>::k_InterpolateBoundaryEdgeOnly); break;
default: printf("unknown interpolation boundary : %d\n", t->intargs[0] ); break;
}
} else if (t->name=="facevaryingpropagatecorners") {
if ((int)t->intargs.size()==1)
mesh->SetFVarPropagateCorners( t->intargs[0] != 0 );
else
printf( "expecting single int argument for \"facevaryingpropagatecorners\"\n" );
} else if (t->name=="creasemethod") {
OpenSubdiv::HbrCatmarkSubdivision<T> * scheme =
dynamic_cast<OpenSubdiv::HbrCatmarkSubdivision<T> *>( mesh->GetSubdivision() );
if (not scheme) {
printf("the \"creasemethod\" tag can only be applied to Catmark meshes\n");
continue;
}
if ((int)t->stringargs.size()==0) {
printf("the \"creasemethod\" tag expects a string argument\n");
continue;
}
if( t->stringargs[0]=="normal" )
scheme->SetTriangleSubdivisionMethod(
OpenSubdiv::HbrCatmarkSubdivision<T>::k_Old);
else if( t->stringargs[0]=="chaikin" )
scheme->SetTriangleSubdivisionMethod(
OpenSubdiv::HbrCatmarkSubdivision<T>::k_New);
else
printf("the \"creasemethod\" tag only accepts \"normal\" or \"chaikin\" as value (%s)\n", t->stringargs[0].c_str());
} else if (t->name=="vertexedit" or t->name=="edgeedit") {
int nops = 0;
int floatstride = 0;
int maxfloatwidth = 0;
std::vector<typename OpenSubdiv::HbrHierarchicalEdit<T>::Operation > ops;
std::vector<std::string> opnames;
std::vector<std::string> varnames;
std::vector<typename OpenSubdiv::HbrHierarchicalEdit<T>::Operation > opmodifiers;
std::vector<int> floatwidths;
std::vector<bool> isP;
std::vector<int> vvindex;
for (int j=0; j<(int)t->stringargs.size(); j+=3) {
const std::string & opname = t->stringargs[j+2];
const std::string & opmodifiername = t->stringargs[j];
const std::string & varname = t->stringargs[j+1];
typename OpenSubdiv::HbrHierarchicalEdit<T>::Operation opmodifier = OpenSubdiv::HbrVertexEdit<T>::Set;
if (opmodifiername == "set") {
opmodifier = OpenSubdiv::HbrHierarchicalEdit<T>::Set;
} else if (opmodifiername == "add") {
opmodifier = OpenSubdiv::HbrHierarchicalEdit<T>::Add;
} else if (opmodifiername == "subtract") {
opmodifier = OpenSubdiv::HbrHierarchicalEdit<T>::Subtract;
} else {
printf("invalid modifier %s\n", opmodifiername.c_str());
continue;
}
if ((t->name=="vertexedit" && opname=="value") || opname=="sharpness") {
nops++;
// only varname="P" is supported here for now.
if (varname != "P") continue;
vvindex.push_back(0);
isP.push_back(true);
opnames.push_back(opname);
opmodifiers.push_back(opmodifier);
varnames.push_back(varname);
if (opname=="sharpness") {
floatwidths.push_back(1);
floatstride += 1;
} else {
// assuming width of P == 3. should be replaced with 'P 0 3' like declaration
int numElements = 3;
maxfloatwidth = std::max(maxfloatwidth, numElements);
floatwidths.push_back(numElements);
floatstride += numElements;
}
} else {
printf("%s tag specifies invalid operation '%s %s' on Subdivmesh\n", t->name.c_str(), opmodifiername.c_str(), opname.c_str());
}
}
float *xformed = (float*)alloca(maxfloatwidth * sizeof(float));
int floatoffset = 0;
for(int j=0; j<nops; ++j) {
int floatidx = floatoffset;
for (int k=0; k < (int)t->intargs.size();) {
int pathlength = t->intargs[k];
int faceid = t->intargs[k+1];
int vertexid = t->intargs[k+pathlength];
int nsubfaces = pathlength - 2;
int *subfaces = &t->intargs[k+2];
OpenSubdiv::HbrFace<T> * f = mesh->GetFace(faceid);
if (!f) {
printf("Invalid face %d specified for %s tag on SubdivisionMesh.\n", faceid, t->name.c_str());
goto nexttag;
}
// Found the face. Do some preliminary error checking to make sure the path is
// correct. First value in path depends on the number of vertices of the face
// which we have in hand
if (nsubfaces && (subfaces[0] < 0 || subfaces[0] >= f->GetNumVertices()) ) {
printf("Invalid path component %d in %s tag on SubdivisionMesh.\n", subfaces[0], t->name.c_str());
goto nexttag;
}
// All subsequent values must be less than 4 (FIXME or 3 in the loop case?)
for (int l=1; l<nsubfaces; ++l) {
if (subfaces[l] < 0 || subfaces[l] > 3) {
printf("Invalid path component %d in %s tag on SubdivisionMesh.\n", subfaces[0], t->name.c_str());
goto nexttag;
}
}
if (vertexid < 0 || vertexid > 3) {
printf("Invalid path component (vertexid) %d in %s tag on SubdivisionMesh.\n", vertexid, t->name.c_str());
goto nexttag;
}
// Transform all the float values associated with the tag if needed
if(opnames[j] != "sharpness") {
for(int l=0; l<floatwidths[j]; ++l) {
xformed[l] = t->floatargs[l + floatidx];
}
// Edits of facevarying data are a different hierarchical edit type altogether
OpenSubdiv::HbrVertexEdit<T> * edit = new OpenSubdiv::HbrVertexEdit<T>(faceid, nsubfaces, subfaces,
vertexid, vvindex[j], floatwidths[j],
isP[j], opmodifiers[j], xformed);
mesh->AddHierarchicalEdit(edit);
} else {
if (t->name == "vertexedit") {
OpenSubdiv::HbrCornerEdit<T> * edit = new OpenSubdiv::HbrCornerEdit<T>(faceid, nsubfaces, subfaces,
vertexid, opmodifiers[j], t->floatargs[floatidx]);
mesh->AddHierarchicalEdit(edit);
} else {
OpenSubdiv::HbrCreaseEdit<T> * edit = new OpenSubdiv::HbrCreaseEdit<T>(faceid, nsubfaces, subfaces,
vertexid, opmodifiers[j], t->floatargs[floatidx]);
mesh->AddHierarchicalEdit(edit);
}
}
// Advance to next path
k += pathlength + 1;
// Advance to start of float data
floatidx += floatstride;
} // End of integer processing loop
// Next subop
floatoffset += floatwidths[j];
} // End of subop processing loop
} else if (t->name=="faceedit") {
int nint = (int)t->intargs.size();
for (int k=0; k<nint; ) {
int pathlength = t->intargs[k];
if (k+pathlength>=nint) {
printf("Invalid path length for %s tag on SubdivisionMesh", t->name.c_str());
goto nexttag;
}
int faceid = t->intargs[k+1];
int nsubfaces = pathlength - 1;
int *subfaces = &t->intargs[k+2];
OpenSubdiv::HbrFace<T> * f = mesh->GetFace(faceid);
if (!f) {
printf("Invalid face %d specified for %s tag on SubdivisionMesh.\n", faceid, t->name.c_str());
goto nexttag;
}
// Found the face. Do some preliminary error checking to make sure the path is
// correct. First value in path depends on the number of vertices of the face
// which we have in hand
if (nsubfaces && (subfaces[0] < 0 || subfaces[0] >= f->GetNumVertices()) ) {
printf("Invalid path component %d in %s tag on SubdivisionMesh.\n", subfaces[0], t->name.c_str());
goto nexttag;
}
// All subsequent values must be less than 4 (FIXME or 3 in the loop case?)
for (int l=1; l<nsubfaces; ++l) {
if (subfaces[l] < 0 || subfaces[l] > 3) {
printf("Invalid path component %d in %s tag on SubdivisionMesh.\n", subfaces[0], t->name.c_str());
goto nexttag;
}
}
// Now loop over string ops
int nstring = (int)t->stringargs.size();
for (int l = 0; l < nstring; ) {
if ( t->stringargs[l] == "hole" ) {
// Construct the edit
OpenSubdiv::HbrHoleEdit<T> * edit = new OpenSubdiv::HbrHoleEdit<T>(faceid, nsubfaces, subfaces);
mesh->AddHierarchicalEdit(edit);
++l;
} else if ( t->stringargs[l] == "attributes" ) {
// see NgpSubdivMesh.cpp:4341
printf("\"attributes\" face tag not supported yet.\n");
goto nexttag;
} else if ( t->stringargs[l] == "set" || t->stringargs[l] == "add" ) {
// see NgpSubdivMesh.cpp:4341
printf("\"set\" and \"add\" face tag not supported yet.\n");
goto nexttag;
} else {
printf("Faceedit tag specifies invalid operation '%s' on Subdivmesh.\n", t->stringargs[l].c_str());
goto nexttag;
}
}
// Advance to next path
k += pathlength + 1;
} // end face path loop
} else {
printf("Unknown tag : \"%s\" - skipping\n", t->name.c_str());
}
nexttag: ;
}
}
//------------------------------------------------------------------------------
template <class T> std::string
hbrToObj( OpenSubdiv::HbrMesh<T> * mesh ) {
std::stringstream sh;
sh<<"# This file uses centimeters as units for non-parametric coordinates.\n\n";
int nv = mesh->GetNumVertices();
for (int i=0; i<nv; ++i) {
const float * pos = mesh->GetVertex(i)->GetData().GetPos();
sh << "v " << pos[0] << " " << pos[1] << " " << pos[2] <<"\n";
}
int nf = mesh->GetNumFaces();
for (int i=0; i<nf; ++i) {
sh << "f ";
OpenSubdiv::HbrFace<T> * f = mesh->GetFace(i);
for (int j=0; j<f->GetNumVertices(); ++j) {
int vert = f->GetVertex(j)->GetID()+1;
sh << vert << "/" << vert << "/" << vert << " ";
}
sh << "\n";
}
sh << "\n";
return sh.str();
}
//------------------------------------------------------------------------------
template <class T> OpenSubdiv::HbrMesh<T> *
createMesh( Scheme scheme=kCatmark, int fvarwidth=0) {
OpenSubdiv::HbrMesh<T> * mesh = 0;
static OpenSubdiv::HbrBilinearSubdivision<T> _bilinear;
static OpenSubdiv::HbrLoopSubdivision<T> _loop;
static OpenSubdiv::HbrCatmarkSubdivision<T> _catmark;
static int indices[1] = { 0 },
widths[1] = { 2 };
int const fvarcount = fvarwidth > 0 ? 1 : 0,
* fvarindices = fvarwidth > 0 ? indices : NULL,
* fvarwidths = fvarwidth > 0 ? widths : NULL;
switch (scheme) {
case kBilinear : mesh = new OpenSubdiv::HbrMesh<T>( &_bilinear,
fvarcount,
fvarindices,
fvarwidths,
fvarwidth ); break;
case kLoop : mesh = new OpenSubdiv::HbrMesh<T>( &_loop,
fvarcount,
fvarindices,
fvarwidths,
fvarwidth ); break;
case kCatmark : mesh = new OpenSubdiv::HbrMesh<T>( &_catmark,
fvarcount,
fvarindices,
fvarwidths,
fvarwidth ); break;
}
return mesh;
}
//------------------------------------------------------------------------------
template <class T> void
createVertices( shape const * sh, OpenSubdiv::HbrMesh<T> * mesh, std::vector<float> * verts ) {
T v;
for(int i=0;i<sh->getNverts(); i++ ) {
v.SetPosition( sh->verts[i*3], sh->verts[i*3+1], sh->verts[i*3+2] );
mesh->NewVertex( i, v );
}
}
//------------------------------------------------------------------------------
template <class T> void
createVertices( shape const * sh, OpenSubdiv::HbrMesh<T> * mesh, std::vector<float> & verts ) {
T v;
for(int i=0;i<sh->getNverts(); i++ )
mesh->NewVertex( i, v );
}
//------------------------------------------------------------------------------
template <class T> void
copyVertexPositions( shape const * sh, OpenSubdiv::HbrMesh<T> * mesh, std::vector<float> & verts ) {
int nverts = mesh->GetNumVertices();
verts.resize( nverts * 3 );
std::copy(sh->verts.begin(), sh->verts.end(), verts.begin());
// Sometimes Hbr dupes some vertices during Mesh::Finish()
if (nverts > sh->getNverts()) {
for (int i=sh->getNverts(); i<nverts; ++i) {
OpenSubdiv::HbrVertex<T> * v = mesh->GetVertex(i);
OpenSubdiv::HbrFace<T> * f = v->GetIncidentEdge()->GetFace();
int vidx = -1;
for (int j=0; j<f->GetNumVertices(); ++j)
if (f->GetVertex(j)==v) {
vidx = j;
break;
}
assert(vidx>-1);
const int * shfaces = &sh->faceverts[0];
for (int j=0; j<f->GetID(); ++j)
shfaces += sh->nvertsPerFace[j];
int shvert = shfaces[vidx];
verts[i*3+0] = sh->verts[shvert*3+0];
verts[i*3+1] = sh->verts[shvert*3+1];
verts[i*3+2] = sh->verts[shvert*3+2];
}
}
}
//------------------------------------------------------------------------------
template <class T> void
createTopology( shape const * sh, OpenSubdiv::HbrMesh<T> * mesh, Scheme scheme) {
const int * fv=&(sh->faceverts[0]);
for(int f=0, ptxidx=0;f<sh->getNfaces(); f++ ) {
int nv = sh->nvertsPerFace[f];
if ((scheme==kLoop) and (nv!=3)) {
printf("Trying to create a Loop surbd with non-triangle face\n");
exit(1);
}
for(int j=0;j<nv;j++) {
OpenSubdiv::HbrVertex<T> * origin = mesh->GetVertex( fv[j] );
OpenSubdiv::HbrVertex<T> * destination = mesh->GetVertex( fv[ (j+1)%nv] );
OpenSubdiv::HbrHalfedge<T> * opposite = destination->GetEdge(origin);
if(origin==NULL || destination==NULL) {
printf(" An edge was specified that connected a nonexistent vertex\n");
exit(1);
}
if(origin == destination) {
printf(" An edge was specified that connected a vertex to itself\n");
exit(1);
}
if(opposite && opposite->GetOpposite() ) {
printf(" A non-manifold edge incident to more than 2 faces was found\n");
exit(1);
}
if(origin->GetEdge(destination)) {
printf(" An edge connecting two vertices was specified more than once."
" It's likely that an incident face was flipped\n");
exit(1);
}
}
OpenSubdiv::HbrFace<T> * face = mesh->NewFace(nv, (int *)fv, 0);
face->SetPtexIndex(ptxidx);
if ( (scheme==kCatmark or scheme==kBilinear) and nv != 4 )
ptxidx+=nv;
else
ptxidx++;
fv+=nv;
}
mesh->SetInterpolateBoundaryMethod( OpenSubdiv::HbrMesh<T>::k_InterpolateBoundaryEdgeOnly );
applyTags<T>( mesh, sh );
mesh->Finish();
// check for disconnected vertices
if (mesh->GetNumDisconnectedVertices()) {
printf("The specified subdivmesh contains disconnected surface components.\n");
exit(1);
}
}
//------------------------------------------------------------------------------
template <class T> void
createFaceVaryingUV( shape const * sh, OpenSubdiv::HbrMesh<T> * mesh) {
if (not sh->hasUV())
return;
for (int i=0, idx=0; i<sh->getNfaces(); ++i ) {
OpenSubdiv::HbrFace<T> * f = mesh->GetFace(i);
int nv = sh->nvertsPerFace[i];
OpenSubdiv::HbrHalfedge<T> * e = f->GetFirstEdge();
for (int j=0; j<nv; ++j, e=e->GetNext()) {
OpenSubdiv::HbrFVarData<T> & fvt = e->GetOrgVertex()->GetFVarData(f);
float const * fvdata = &sh->uvs[ sh->faceuvs[idx++]*2 ];
if (not fvt.IsInitialized()) {
fvt.SetAllData(2, fvdata);
} else if (not fvt.CompareAll(2, fvdata)) {
OpenSubdiv::HbrFVarData<T> & nfvt = e->GetOrgVertex()->NewFVarData(f);
nfvt.SetAllData(2, fvdata);
}
}
}
}
//------------------------------------------------------------------------------
template <class T> OpenSubdiv::HbrMesh<T> *
simpleHbr(char const * shapestr, Scheme scheme, std::vector<float> * verts=0, bool fvar=false) {
shape * sh = shape::parseShape( shapestr );
int fvarwidth = fvar and sh->hasUV() ? 2 : 0;
OpenSubdiv::HbrMesh<T> * mesh = createMesh<T>(scheme, fvarwidth);
createVertices<T>(sh, mesh, verts);
createTopology<T>(sh, mesh, scheme);
if (fvar)
createFaceVaryingUV<T>(sh, mesh);
if (verts)
copyVertexPositions<T>(sh,mesh,*verts);
delete sh;
return mesh;
}
//------------------------------------------------------------------------------
template <class T> OpenSubdiv::HbrMesh<T> *
simpleHbr(char const * shapestr, Scheme scheme, std::vector<float> & verts, bool fvar=false) {
shape * sh = shape::parseShape( shapestr );
int fvarwidth = fvar and sh->hasUV() ? 2 : 0;
OpenSubdiv::HbrMesh<T> * mesh = createMesh<T>(scheme, fvarwidth);
createVertices<T>(sh, mesh, verts);
createTopology<T>(sh, mesh, scheme);
if (fvar)
createFaceVaryingUV<T>(sh, mesh);
copyVertexPositions<T>(sh,mesh,verts);
delete sh;
return mesh;
}
#endif /* SHAPE_UTILS_H */
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