/* parse a line in the form of "<f> <v1/t1/n1> <v2/t2/n2> <v3/t3/n3> <v4/t4/n4>"
into a face. The texture and normal indices are optional */
bool parseFace(QString line, uint *vertices, uint *normals, bool &hasNormals) {
line = line.simplified();
//ensure that the face is a quad
QStringList tokens = line.split(" ", QString::SkipEmptyParts);
if (tokens.size() != 5)
return false;
hasNormals = false;
QStringListIterator it(tokens);
it.next();
for (uint i = 0; i < 4; i++) {
//parse the token into its vertex, texture, and normal indices
QString vertexStr = it.next();
QStringList vertexTokens = vertexStr.split("/");
//check if data is properly formatted
bool validVertex = vertexTokens.size() > 0 && vertexTokens.size() <= 3;
bool validNormals = !hasNormals || vertexTokens.size() == 3; //has normals --> 3 vertex tokens
if (!validVertex || !validNormals)
return false;
//add vertex index
bool ok = false;
QStringListIterator vertexIt(vertexTokens);
vertices[i] = vertexIt.next().toInt(&ok) - 1;
//since we ignore texture indices, we can skip the second token
if (vertexTokens.size() == 3) {
hasNormals = true;
vertexIt.next();
normals[i] = vertexIt.next().toInt(&ok) - 1;
}
if (!ok) return false;
}
return true;
}
void exportTerrain::printPolygonData(const MFnMesh &theMesh,const bool phy)
{
MStatus status;
MPointArray vertices;
MIntArray perPolyVertices, numVerticesPerPoly;
MVector tNorm;
MVectorArray perVertexNormals, normals;
MItMeshPolygon itPoly( theMesh.object() );
long numPolygons = theMesh.numPolygons();
long numVertices = theMesh.numVertices();
theMesh.getPoints(vertices);
fout << "Vertices: " << endl;
fout << "Number of Vertices: " << numVertices << endl;
fout << vertices << endl;
fout << "Number of polygons: " << numPolygons << endl;
fout << "Polygon Connection List:" << endl;
fout << "[";
for(int i = 0; i < numPolygons - 1; ++i){
fout << i << ": ";
status = theMesh.getPolygonVertices(i, perPolyVertices);
fout << perPolyVertices;
fout << ", " << endl;
}
//last is a special case
fout << numPolygons -1 << ": ";
status = theMesh.getPolygonVertices(numPolygons -1, perPolyVertices);
fout << perPolyVertices;
fout << "]" << endl;
//Per Vertex Normals
for(i=0; i < numVertices; ++i){
theMesh.getVertexNormal( i, tNorm);
perVertexNormals.append(tNorm);
}
fout << "Per Vertex Normals: \n";
fout << perVertexNormals << endl;
/* //per vertex per polygon Normals
//Not supported by the Reaper graphic engine
fout << "Normals" << endl;
i = 0;
fout << "[ ";
while (!itPoly.isDone() ){
itPoly.getNormals(normals);
fout << i << ": " << normals << endl;
++i;
itPoly.next();
}
fout << " ]" << endl;
*/
if( !phy ){
//Texture coordinate information
MIntArray ids;
int index;
MFloatArray Us, Vs;
theMesh.getUVs(Us,Vs);
MFloatArray u_s(numVertices),v_s(numVertices);
MIntArray numuvs(numVertices,0);
//Now the tactic is:
//Iterate over all polygons, and for each vertex read out the UV out of the list
//Insert that in two float arrays, and keep track of how many uvs
//that have been inserted. At last divd the us and vs by the number you
//already go there
//Shared uvs will look strange, but it is the average uvs that is shown
//Make sure to model using no shared uvs
for(i = 0;i<numPolygons;++i){
MIntArray polyVertices;
theMesh.getPolygonVertices(i,polyVertices);
for(int j = 0;j<polyVertices.length();++j){
int uv_id;
theMesh.getPolygonUVid(i,j,uv_id);
u_s[polyVertices[j]] += Us[uv_id];
v_s[polyVertices[j]] += Vs[uv_id];
numuvs[polyVertices[j]]+=1;
}
}
for(int k = 0;k<numVertices;++k){
u_s[k] /= numuvs[k];
v_s[k] /= numuvs[k];
}
fout << "Texture Coordinates: \n";
fout << "[" ;
for(index = 0;index < (u_s.length() - 1); ++index){
fout << index << ": [" << u_s[index] << ", " <<
v_s[index] << "]," << endl;
}
//last is a special case
fout << index << ": [" << u_s[index] << ", " <<
v_s[index] << "]";
fout << "]" << endl;
//Color data, for coloring. Make sure
MItMeshVertex vertexIt(theMesh.object());
MColor color;
std::vector<MColor> colorArray;
while (!vertexIt.isDone() ){
vertexIt.getColor(color);
colorArray.push_back(color);
vertexIt.next();
}
fout << "PerVertexColors: \n";
fout << "[" ;
for(index = 0;index < colorArray.size()-1; ++index){
fout << index << ": " << colorArray[index] << "," << endl;
}
//last is a special case
fout << index << ": " << colorArray[index];
fout << "]" << endl;
}
}
