ObjMesh * ObjMeshOrientable::GenerateOrientedMesh()
{
ObjMesh * outputObjMesh = new ObjMesh(*objMesh);
for(unsigned int i=0; i < outputObjMesh->getNumGroups(); i++) // over all groups
{
ObjMesh::Group * groupHandle = (ObjMesh::Group*) outputObjMesh->getGroupHandle(i);
for (unsigned int j=0; j < groupHandle->getNumFaces(); j++) // over all faces
{
const ObjMesh::Face * face = groupHandle->getFaceHandle(j);
if (face->getNumVertices() < 3)
{
printf("Warning: encountered a face with fewer than 3 vertices.\n");
continue;
}
HalfEdge edge = edgeAtFace(i, j);
// loop until edge is first edge
unsigned int startPosition = face->getVertex(0).getPositionIndex();
while (edgeStartVertex(edge).getPositionIndex() != startPosition)
edge = edgeNext(edge);
// reverse the face if not correctly oriented
if (edgeEndVertex(edge).getPositionIndex() != face->getVertex(1).getPositionIndex())
groupHandle->reverseFace(j);
}
}
return outputObjMesh;
}
int main( int argc, char** argv )
{
const int numFixedArguments = 3;
if( argc < numFixedArguments )
{
std::cout << "Merges several obj meshes into one. This routine uses the \"objMesh\" class to load the meshes. It can also merge materials." << std::endl;
std::cout << "Usage: " << argv[0] << " [list of obj files] [output file] [-m]" << std::endl;
std::cout << " -m : also output materials" << std::endl;
std::cout << " -d : (if -m) also remove duplicate materials" << std::endl;
return 1;
}
bool outputMaterials = false;
bool removeDuplicatedMaterials = false;
char * objListFilename = argv[1];
char * objMeshname = argv[2];
opt_t opttable[] =
{
{ (char*)"m", OPTBOOL, &outputMaterials },
{ (char*)"d", OPTBOOL, &removeDuplicatedMaterials },
{ NULL, 0, NULL }
};
argv += numFixedArguments-1;
argc -= numFixedArguments-1;
int optup = getopts(argc,argv,opttable);
if (optup != argc)
{
printf("Error parsing options. Error at option %s.\n",argv[optup]);
return 1;
}
ObjMesh outputObjMesh;
char s[4096];
FILE * fin;
char fileMode[96] = "r";
OpenFile_(objListFilename, &fin, fileMode);
while(fgets(s,4096,fin) != 0)
{
if(s[strlen(s)-1] == '\n')
s[strlen(s)-1] = '\0';
printf("%s\n",s);
ObjMesh * objMesh = new ObjMesh(s);
// add vertices
int numVerticesCurrent = outputObjMesh.getNumVertices();
for(unsigned int i=0; i<objMesh->getNumVertices(); i++)
outputObjMesh.addVertexPosition(objMesh->getPosition(i));
// add normals
int numNormalsCurrent = outputObjMesh.getNumNormals();
for(unsigned int i=0; i<objMesh->getNumNormals(); i++)
outputObjMesh.addVertexNormal(objMesh->getNormal(i));
// add texture coordinates
int numTextureCoordinatesCurrent = outputObjMesh.getNumTextureCoordinates();
for(unsigned int i=0; i<objMesh->getNumTextureCoordinates(); i++)
outputObjMesh.addTextureCoordinate(objMesh->getTextureCoordinate(i));
// add materials
int numMaterialsCurrent = outputObjMesh.getNumMaterials();
for(unsigned int i=0; i<objMesh->getNumMaterials(); i++)
outputObjMesh.addMaterial(objMesh->getMaterial(i));
for(unsigned int i=0; i<objMesh->getNumGroups(); i++)
{
const ObjMesh::Group * group = objMesh->getGroupHandle(i);
outputObjMesh.addGroup(group->getName());
unsigned int newGroupID = outputObjMesh.getNumGroups() - 1;
ObjMesh::Group * newGroup = (ObjMesh::Group*) outputObjMesh.getGroupHandle(newGroupID);
newGroup->setMaterialIndex(numMaterialsCurrent + group->getMaterialIndex());
// over all faces in the group of the current obj file
for(unsigned int j=0; j<group->getNumFaces(); j++)
{
const ObjMesh::Face * face = group->getFaceHandle(j);
for(unsigned int k=0; k<face->getNumVertices(); k++)
{
ObjMesh::Vertex * vertex = (ObjMesh::Vertex*) face->getVertexHandle(k);
vertex->setPositionIndex(vertex->getPositionIndex() + numVerticesCurrent);
if (vertex->hasNormalIndex())
vertex->setNormalIndex(vertex->getNormalIndex() + numNormalsCurrent);
if (vertex->hasTextureCoordinateIndex())
vertex->setTextureCoordinateIndex(vertex->getTextureCoordinateIndex() + numTextureCoordinatesCurrent);
}
outputObjMesh.addFaceToGroup(*face,newGroupID);
}
}
delete(objMesh);
}
fclose(fin);
if (outputMaterials)
{
if (removeDuplicatedMaterials)
{
printf("Removing duplicated materials..."); fflush(NULL);
int numNewMaterials = outputObjMesh.removeDuplicatedMaterials();
printf(" retained %d materials.\n", numNewMaterials);
}
outputObjMesh.save(objMeshname, 1);
}
else
{
outputObjMesh.save(objMeshname);
}
return(0);
}
