//----------------------------------------------------------
void CMesh::generateMeshInfo(void)
{
if ((mSceneNode == NULL) || (mEntity == NULL))
{
std::cout << "Error in CMesh::generateMeshInfo()" << std::endl;
return;
}
Utilities::getMeshInformation(mEntity->getMesh(), mVertexCount, mVertices, mIndexCount, mIndices,
mEntity->getParentNode()->_getDerivedPosition(),
mEntity->getParentNode()->_getDerivedOrientation(),
mEntity->getParentNode()->_getDerivedScale());
mTriCount = mIndexCount / 3;
// Allocate space for mNormals and mTriFlags
mNormals = new Vector3[mTriCount];
mTriFlags = new int[mTriCount];
// Initialize mNormals
memset(mTriFlags, 0, mTriCount*sizeof(int));
// Calculate face normals
calculateFaceNormals();
}
void KHalfEdgeMeshPrivate::calculateVertexNormals()
{
std::vector<KVector3D> accumulator;
calculateFaceNormals();
for (Vertex &v : m_vertices)
{
v.normal = calculateVertexNormal(&v, accumulator);
}
}
void Mesh::calculateVertexNormals()
{
std::vector<glm::vec3> faceNormals;
calculateFaceNormals(faceNormals);
//std::cout << "calculating vertex normals.. ";
//std::cout.flush();
//aF contains indices of adjacend faces per vertex
//interpolate normals of adjacend faces per vertex
for(uint i = 0; i< vertices.size(); i++){
calculateVertexNormal(faceNormals, i);
/*
glm::vec3 vertexNormal = glm::vec3(0);
for(uint j= 0; j < aF[i].size(); j++){
// find out which vertex of the current face is the vertex we are currently looking at
// aF[i] is a list of faces (aka a list of indices of the indices-vector)
// so indices[aF[i][j]] is a glm::vec3 that contains one face
// and the current vertex is vertex[i]
int thisVertexIndex = -1;
for(int vIndex=0; vIndex < 3; vIndex++)
{
glm::vec3 pos1 = vertices[indices[aF[i][j]][vIndex]].Position;
glm::vec3 pos2 = vertices[i].Position;
if(glm::distance(pos1, pos2) < 0.0001f)
{
thisVertexIndex = vIndex;
break;
}
}
// we got index of our current vertex within the face, now get others
int other1 = (thisVertexIndex+1) % 3;
int other2 = (thisVertexIndex+2) % 3;
// create the vectors the represent the edges from current vertex to the other 2
glm::vec3 edge1 = vertices[indices[aF[i][j]][thisVertexIndex]].Position - vertices[indices[aF[i][j]][other1]].Position;
glm::vec3 edge2 = vertices[indices[aF[i][j]][thisVertexIndex]].Position - vertices[indices[aF[i][j]][other2]].Position;
// get angle between the edges
float incidentAngle = abs(glm::angle(glm::normalize(edge1), glm::normalize(edge2)));
if(incidentAngle > 180)
incidentAngle = 360 - incidentAngle;
// use that angle as weighting
vertexNormal += (faceNormals[aF[i][j]] * incidentAngle);
}
vertices[i].Normal = glm::normalize(vertexNormal);*/
}
//std::cout << "done." << std::endl;
}
int CObject::loadObject(std::string path){
std::fstream file(path, std::fstream::in | std::fstream::out);
if (!file.is_open()){
std::cout << "No se pudo abrir el archivo" << std::endl;
return 0;
}
int i, j, indexMinMax = 0, numF;
GLfloat point;
std::vector <GLuint> fc,ft;
GLuint pt;
std::string type;
file >> type;
j = 0;
fc.clear();
while (!file.eof()){
std::string subtype = type.substr(0, 1);
std::string line;
if (subtype == "#"){
std::getline(file, line);
}
if (type == "vt"){
std::getline(file, line);
}
if (type == "vn"){
std::getline(file, line);
} //List of Vertex
if (type == "v"){
for (i = 0; i < 3; i++){
file >> point;
mVertex.push_back(point);
switch (i){
case 0:
if (xmin == NULL){
xmin = point;
}
else{
if (point < xmin) xmin = point;
}
if (xmax == NULL){
xmax = point;
}
else{
if (point > xmax) xmax = point;
}
break;
case 1:
if (ymin == NULL){
ymin = point;
}
else{
if (point < ymin) ymin = point;
}
if (ymax == NULL){
ymax = point;
}
else{
if (point > ymax) ymax = point;
}
break;
case 2:
if (zmin == NULL){
zmin = point;
}
else{
if (point < zmin) zmin = point;
}
if (zmax == NULL){
zmax = point;
}
else{
if (point > zmax) zmax = point;
}
break;
}
}
mColor.push_back(0);
mColor.push_back(1);
mColor.push_back(0);
nVertex++;
//
//calculateMinMax(indexMinMax);
indexMinMax++;
//
}//List of Faces
if (type == "f"){
std::getline(file, line);
char * tok = strtok(&line[0u], " ");
while (tok != NULL){
std::string num = tok;
std::size_t pos = num.find("/");
num = num.substr(0, pos);
pt = stoi(num);
fc.push_back(pt);
tok = strtok(NULL, " ");
}
nFaces++;
for (j = 1; j < fc.size() - 1; j++){
mIndexes.push_back(fc[0] - 1);
mIndexes.push_back(fc[j] - 1);
mIndexes.push_back(fc[j + 1] - 1);
}
fc.clear();
}
file >> type;
}
xmid = (xmin + xmax) / 2;
ymid = (ymin + ymax) / 2;
zmid = (zmin + zmax) / 2;
calculateFaceNormals();
calculateVertexNormals();
//Initialize buffer
file.close();
std::cout << "Object loaded" << std::endl;
return 1;
}
IndexedFaceSetNode::IndexedFaceSetNode(VRMLParser& parser)
:ccw(true),solid(true),convex(true),
colorPerVertex(true),
normalPerVertex(true),creaseAngle(0.0f)
{
/* Check for the opening brace: */
if(!parser.isToken("{"))
Misc::throwStdErr("IndexedFaceSetNode::IndexedFaceSetNode: Missing opening brace in node definition");
parser.getNextToken();
/* Process attributes until closing brace: */
while(!parser.isToken("}"))
{
if(parser.isToken("ccw"))
{
parser.getNextToken();
ccw=SFBool::parse(parser);
}
else if(parser.isToken("solid"))
{
parser.getNextToken();
solid=SFBool::parse(parser);
}
else if(parser.isToken("convex"))
{
parser.getNextToken();
convex=SFBool::parse(parser);
}
else if(parser.isToken("colorPerVertex"))
{
parser.getNextToken();
colorPerVertex=SFBool::parse(parser);
}
else if(parser.isToken("normalPerVertex"))
{
parser.getNextToken();
normalPerVertex=SFBool::parse(parser);
}
else if(parser.isToken("creaseAngle"))
{
parser.getNextToken();
creaseAngle=SFFloat::parse(parser);
}
else if(parser.isToken("texCoord"))
{
/* Parse the texture coordinate node: */
parser.getNextToken();
texCoord=parser.getNextNode();
}
else if(parser.isToken("color"))
{
/* Parse the color node: */
parser.getNextToken();
color=parser.getNextNode();
}
else if(parser.isToken("normal"))
{
/* Parse the normal node: */
parser.getNextToken();
normal=parser.getNextNode();
}
else if(parser.isToken("coord"))
{
/* Parse the coordinate node: */
parser.getNextToken();
coord=parser.getNextNode();
}
else if(parser.isToken("texCoordIndex"))
{
/* Parse the texture coordinate index array: */
parser.getNextToken();
texCoordIndices=MFInt32::parse(parser);
}
else if(parser.isToken("colorIndex"))
{
/* Parse the color index array: */
parser.getNextToken();
colorIndices=MFInt32::parse(parser);
}
else if(parser.isToken("normalIndex"))
{
/* Parse the normal vector index array: */
parser.getNextToken();
normalIndices=MFInt32::parse(parser);
}
else if(parser.isToken("coordIndex"))
{
/* Parse the coordinate index array: */
parser.getNextToken();
coordIndices=MFInt32::parse(parser);
/* Terminate the coordinate index array: */
if(coordIndices.back()>=0)
coordIndices.push_back(-1);
}
else
Misc::throwStdErr("IndexedFaceSetNode::IndexedFaceSetNode: unknown attribute \"%s\" in node definition",parser.getToken());
}
/* Skip the closing brace: */
parser.getNextToken();
/* Create normal vectors if necessary: */
CoordinateNode* c=dynamic_cast<CoordinateNode*>(coord.getPointer());
NormalNode* n=dynamic_cast<NormalNode*>(normal.getPointer());
if(coord!=0&&n==0)
{
/* Create a new normal node and clear the normal index array: */
n=new NormalNode;
normal=n;
normalIndices.clear();
/* Create normal vectors and normal indices: */
if(normalPerVertex)
calculateVertexNormals(c,coordIndices,Math::cos(creaseAngle),n,normalIndices);
else
calculateFaceNormals(c,coordIndices,n);
}
}
Model::Model(const char* filename)
{
char lineBuf[1024];
FILE* f = fopen(filename, "r");
// Initialize the extents - hopefully 1e10 is big enough!
mExtents.minX = 1e10;
mExtents.maxX = -1e10;
mExtents.minY = 1e10;
mExtents.maxY = -1e10;
mExtents.minZ = 1e10;
mExtents.maxZ = -1e10;
// Read the list of points
while(!feof(f)){
// Read the first character, ignoring whitespace
char type1, type2;
fscanf(f, " %c%c", &type1, &type2);
if(type1 == 'v' && type2 == ' '){ // Vertex
float x, y, z;
fscanf(f, "%f %f %f", &x, &y, &z); // Read the three coordinates
mVertices.push_back(point3(x, y, z)); // Save them in the vector
if(x < mExtents.minX){ mExtents.minX = x; }
if(y < mExtents.minY){ mExtents.minY = y; }
if(z < mExtents.minZ){ mExtents.minZ = z; }
if(x > mExtents.maxX){ mExtents.maxX = x; }
if(y > mExtents.maxY){ mExtents.maxY = y; }
if(z > mExtents.maxZ){ mExtents.maxZ = z; }
}
else if(type1 == 'v' && type2 == 'n'){ // Vertex normal
float x, y, z;
fscanf(f, "%f %f %f", &x, &y, &z);
mVertexNormals.push_back(point3(x, y, z));
}
else if(type1 == 'v' && type2 == 't'){ // Texture coordinate
float x, y, z;
fscanf(f, "%f %f %f", &x, &y, &z);
mTextureCoords.push_back(point3(x, y, z));
}
else if(type1 == 'f'){ // Face
// This could be specified as either "f A B C" or as "f A/Anorm/Atex B/Bnorm/Btex ..."
fscanf(f, " %[^\n]", lineBuf);
if(strchr(lineBuf, '/')){
unsigned int a, aNorm, aTex, b, bNorm, bTex, c, cNorm, cTex;
sscanf(lineBuf, "%d/%d/%d %d/%d/%d %d/%d/%d",
&a, &aNorm, &aTex, &b, &bNorm, &bTex, &c, &cNorm, &cTex);
mTriangles.push_back(triangle(a-1, b-1, c-1));
}
else{
unsigned int a, b, c;
sscanf(lineBuf, "%d %d %d", &a, &b, &c); // Read the three indices
mTriangles.push_back(triangle(a-1, b-1, c-1)); // Save them in the vector
}
}
else if(type1 == '#'){
// Comment; eat up the whole line
fscanf(f, " %[^\n]", lineBuf);
}
else{
LOGI("Unexpected input character '%c' while reading OBJ file %s\n", type1, filename);
fscanf(f, " %[^\n]", lineBuf); // Eat the whole line
}
}
LOGI("Loaded model %s with %ld vertices, %ld faces\n", filename, mVertices.size(), mTriangles.size());
calculateFaceNormals();
if(mVertexNormals.size() == 0){
calculateVertexNormals();
}
// Create buffer handles for all of our vertex attribute buffers
glGenBuffers(4, mAttributeBuffers);
loadVertexBuffers();
mFlatShading = true;
mUseTexture = false; // Not ready to use texture until we've loaded one
}