Mesh::Mesh(const string &file)
: scale(1.)
{
int i;
#define OUT { vertices.clear(); edges.clear(); return; }
ifstream obj(file.c_str());
if(!obj.is_open()) {
Debugging::out() << "Error opening file " << file << endl;
return;
}
Debugging::out() << "Reading " << file << endl;
if(file.length() < 4) {
Debugging::out() << "I don't know what kind of file it is" << endl;
return;
}
if(string(file.end() - 4, file.end()) == string(".obj"))
readObj(obj);
else if(string(file.end() - 4, file.end()) == string(".ply"))
readPly(obj);
else if(string(file.end() - 4, file.end()) == string(".off"))
readOff(obj);
else if(string(file.end() - 4, file.end()) == string(".gts"))
readGts(obj);
else if(string(file.end() - 4, file.end()) == string(".stl"))
readStl(obj);
else {
Debugging::out() << "I don't know what kind of file it is" << endl;
return;
}
//reconstruct the rest of the information
int verts = vertices.size();
if(verts == 0)
return;
for(i = 0; i < (int)edges.size(); ++i) { //make sure all vertex indices are valid
if(edges[i].vertex < 0 || edges[i].vertex >= verts) {
Debugging::out() << "Error: invalid vertex index " << edges[i].vertex << endl;
OUT;
}
}
fixDupFaces();
computeTopology();
if(integrityCheck())
Debugging::out() << "Successfully read " << file << ": " << vertices.size() << " vertices, " << edges.size() << " edges" << endl;
else
Debugging::out() << "Somehow read " << file << ": " << vertices.size() << " vertices, " << edges.size() << " edges" << endl;
computeVertexNormals();
}
Mesh::Mesh(const string& file, int camNum/*=0*/)
{
#ifndef _EXEC_FAST
printf("%s%s","Reading ",file.c_str());
#endif
ifstream obj(file.c_str());
if(!obj.is_open()) { printf("can not read the mesh file!\n"); return;}
if(file.length() < 4)
return;
if(string(file.end() - 4, file.end()) == string(".off"))
ReadOff(obj,camNum);
else if(string(file.end() - 5, file.end()) == string(".mesh"))
ReadMesh(obj, camNum);
else if(string(file.end() - 6, file.end()) == string(".dmesh"))
ReadMesh(obj,camNum);
else
return;
obj.close();
int verts = int(vertices.size());
if(verts == 0)
return;
for(int i = 0; i < (int)edges.size(); ++i) //保证所有的顶点都是有效的
{
if(edges.at(i).vertex<0||edges.at(i).vertex>=verts)
{
vertices.clear();
edges.clear();
cout<<"error!"<<i<<endl;
return;
}
}
computeVertexNormals();
#ifndef _EXEC_FAST
printf(" success!\n");
#endif
}
TriangleMeshSmoother::TriangleMeshSmoother(osg::Geometry& geometry, float creaseAngle, bool comparePosition, int mode):
_geometry(geometry),
_creaseAngle(creaseAngle),
_graph(0),
_mode(mode)
{
if(!_geometry.getVertexArray() || !_geometry.getVertexArray()->getNumElements()) {
return;
}
osgUtil::SharedArrayOptimizer deduplicator;
deduplicator.findDuplicatedUVs(geometry);
// duplicate shared arrays as it isn't safe to duplicate vertices when arrays are shared.
if (geometry.containsSharedArrays()) {
geometry.duplicateSharedArrays();
}
if(!_geometry.getNormalArray() || _geometry.getNormalArray()->getNumElements() != _geometry.getVertexArray()->getNumElements()) {
_geometry.setNormalArray(new osg::Vec3Array(_geometry.getVertexArray()->getNumElements()), osg::Array::BIND_PER_VERTEX);
}
// build a unifier to consider deduplicated vertex indices
_graph = new TriangleMeshGraph(_geometry, comparePosition);
unsigned int nbTriangles = 0;
for(unsigned int i = 0 ; i < _geometry.getNumPrimitiveSets() ; ++ i) {
osg::PrimitiveSet* primitive = _geometry.getPrimitiveSet(i);
if(!primitive || !primitive->getNumIndices()) {
continue;
}
else if(primitive->getMode() > osg::PrimitiveSet::TRIANGLES) {
OSG_INFO << "[smoother] Cannot smooth geometry '" << _geometry.getName()
<< "' due to not tessellated primitives" << std::endl;
return;
}
else if(primitive->getMode() == osg::PrimitiveSet::TRIANGLES) {
nbTriangles += primitive->getNumIndices() / 3;
}
}
_triangles.reserve(nbTriangles);
// collect all buffers that are BIND_PER_VERTEX for eventual vertex duplication
addArray(_geometry.getVertexArray());
addArray(_geometry.getColorArray());
addArray(_geometry.getSecondaryColorArray());
addArray(_geometry.getFogCoordArray());
for(unsigned int i = 0; i < _geometry.getNumTexCoordArrays(); ++ i) {
addArray(_geometry.getTexCoordArray(i));
}
for(unsigned int i = 0; i < _geometry.getNumVertexAttribArrays(); ++ i) {
addArray(_geometry.getVertexAttribArray(i));
}
switch(_mode) {
case recompute:
computeVertexNormals();
break;
case smooth_all:
smoothVertexNormals(true, true);
break;
case smooth_flipped:
smoothVertexNormals(true, false);
break;
case diagnose:
smoothVertexNormals(false, false);
break;
};
// deduplicate UVs array that were only shared within the geometry
deduplicator.deduplicateUVs(geometry);
}
