int GModel::writeDIFF(const std::string &name, bool binary, bool saveAll,
double scalingFactor)
{
if(binary){
Msg::Error("Binary DIFF output is not implemented");
return 0;
}
FILE *fp = Fopen(name.c_str(), binary ? "wb" : "w");
if(!fp){
Msg::Error("Unable to open file '%s'", name.c_str());
return 0;
}
if(noPhysicalGroups()) saveAll = true;
// get the number of vertices and index the vertices in a continuous
// sequence
int numVertices = indexMeshVertices(saveAll);
// tag the vertices according to which surface they belong to (Note
// that we use a brute force approach here, so that we can deal with
// models with incomplete topology. For example, when we merge 2 STL
// triangulations we don't have the boundary information between the
// faces, and the vertices would end up categorized on either one.)
std::vector<std::list<int> > vertexTags(numVertices);
std::list<int> boundaryIndicators;
for(riter it = firstRegion(); it != lastRegion(); it++){
std::list<GFace*> faces = (*it)->faces();
for(std::list<GFace*>::iterator itf = faces.begin(); itf != faces.end(); itf++){
GFace *gf = *itf;
boundaryIndicators.push_back(gf->tag());
for(unsigned int i = 0; i < gf->getNumMeshElements(); i++){
MElement *e = gf->getMeshElement(i);
for(int j = 0; j < e->getNumVertices(); j++){
MVertex *v = e->getVertex(j);
if(v->getIndex() > 0)
vertexTags[v->getIndex() - 1].push_back(gf->tag());
}
}
}
}
boundaryIndicators.sort();
boundaryIndicators.unique();
for(int i = 0; i < numVertices; i++){
vertexTags[i].sort();
vertexTags[i].unique();
}
// get all the entities in the model
std::vector<GEntity*> entities;
getEntities(entities);
// find max dimension of mesh elements we need to save
int dim = 0;
for(unsigned int i = 0; i < entities.size(); i++)
if(entities[i]->physicals.size() || saveAll)
for(unsigned int j = 0; j < entities[i]->getNumMeshElements(); j++)
dim = std::max(dim, entities[i]->getMeshElement(j)->getDim());
// loop over all elements we need to save
int numElements = 0, maxNumNodesPerElement = 0;
for(unsigned int i = 0; i < entities.size(); i++){
if(entities[i]->physicals.size() || saveAll){
for(unsigned int j = 0; j < entities[i]->getNumMeshElements(); j++){
MElement *e = entities[i]->getMeshElement(j);
if(e->getStringForDIFF() && e->getDim() == dim){
numElements++;
maxNumNodesPerElement = std::max(maxNumNodesPerElement, e->getNumVertices());
}
}
}
}
fprintf(fp, "\n\n");
fprintf(fp, " Finite element mesh (GridFE):\n\n");
fprintf(fp, " Number of space dim. = 3\n");
fprintf(fp, " Number of elements = %d\n", numElements);
fprintf(fp, " Number of nodes = %d\n\n", numVertices);
fprintf(fp, " All elements are of the same type : dpTRUE\n");
fprintf(fp, " Max number of nodes in an element: %d \n", maxNumNodesPerElement);
fprintf(fp, " Only one subdomain : dpFALSE\n");
fprintf(fp, " Lattice data ? 0\n\n\n\n");
fprintf(fp, " %d Boundary indicators: ", (int)boundaryIndicators.size());
for(std::list<int>::iterator it = boundaryIndicators.begin();
it != boundaryIndicators.end(); it++)
fprintf(fp, " %d", *it);
fprintf(fp, "\n\n\n");
fprintf(fp," Nodal coordinates and nodal boundary indicators,\n");
fprintf(fp," the columns contain:\n");
fprintf(fp," - node number\n");
fprintf(fp," - coordinates\n");
fprintf(fp," - no of boundary indicators that are set (ON)\n");
fprintf(fp," - the boundary indicators that are set (ON) if any.\n");
fprintf(fp,"#\n");
// write mesh vertices
for(unsigned int i = 0; i < entities.size(); i++){
for(unsigned int j = 0; j < entities[i]->mesh_vertices.size(); j++){
MVertex *v = entities[i]->mesh_vertices[j];
if(v->getIndex() > 0){
v->writeDIFF(fp, binary, scalingFactor);
fprintf(fp, " [%d] ", (int)vertexTags[v->getIndex() - 1].size());
for(std::list<int>::iterator it = vertexTags[v->getIndex() - 1].begin();
it != vertexTags[v->getIndex() - 1].end(); it++)
fprintf(fp," %d ", *it);
fprintf(fp,"\n");
}
}
}
fprintf(fp, "\n");
fprintf(fp, "\n");
fprintf(fp, " Element types and connectivity\n");
fprintf(fp, " the columns contain:\n");
fprintf(fp, " - element number\n");
fprintf(fp, " - element type\n");
fprintf(fp, " - subdomain number \n");
fprintf(fp, " - the global node numbers of the nodes in the element.\n");
fprintf(fp, "#\n");
// write mesh elements
int num = 0;
for(unsigned int i = 0; i < entities.size(); i++){
if(entities[i]->physicals.size() || saveAll){
for(unsigned int j = 0; j < entities[i]->getNumMeshElements(); j++){
MElement *e = entities[i]->getMeshElement(j);
if(e->getStringForDIFF() && e->getDim() == dim)
e->writeDIFF(fp, ++num, binary, entities[i]->tag());
}
}
}
fprintf(fp, "\n");
fclose(fp);
return 1;
}
