Chain VertexStream::readObj(const Chain & fname) {
InputBuffer in(fname.c_str());
Chain src = in.readString(in.get_Size()).c_str();
src.setDelimiters("\n\r");
int numValues;
Chain token;
if (!src.length()) {
return "The file could not be opened";
}
vector<GLfloat> OBJvertexList;
vector<GLfloat> OBJtexCoords;
vector<GLfloat> OBJnormals;
vector<GLfloat> OBJspaceCoords;
vector<GLfloat> OBJfaceVertex;
src.nextLink();
while(src.linksLeft()) {
Chain line;
line.setDelimiters(" ");
line = src.getLink().c_str();
//cout << "Currentline: {" << line << "}" << endl;
if (line.getLink()[0] == '#') {
// read comment
cout << "Reading a comment..." << endl;
src++;
} else if (line.getLink() == "v") {
// read vertices
Chain vertexLine;
vertexLine.setDelimiters(" \t");
vertexLine = line.c_str();
numValues = 0;
cout << "Read vertex {";
vertexLine++; // skip v
while(vertexLine.linksLeft()) {
numValues++;
OBJvertexList.push_back(atof(vertexLine.getLink().c_str()));
cout << vertexLine.getLink().c_str() << ", ";
vertexLine++;
}
if (numValues == 3) {
OBJvertexList.push_back(1.f);
cout << "1.f";
}
cout << "}" << endl;
src++;
} else if (line.getLink() == "vt") {
// texture coords
Chain textureLine;
textureLine.setDelimiters(" \t");
textureLine = line.c_str();
int numCoords = 0;
cout << "Read texCoords {";
textureLine++; // skip vt
while(textureLine.linksLeft() && numCoords < 2) {
cout << textureLine.getLink().c_str() << ", ";
OBJtexCoords.push_back(atof(textureLine.getLink().c_str()));
numCoords++;
textureLine++;
// discard optional 3rd coordinate
}
cout << "}\n";
src++;
} else if (line.getLink() == "vn") {
// normals
Chain normalLine;
normalLine.setDelimiters(" \t");
normalLine = line.c_str();
cout << "read normal {";
normalLine++; // skip vn
while(normalLine.linksLeft()){
cout << normalLine.getLink() << ", ";
OBJnormals.push_back(atof(normalLine.getLink().c_str()));
normalLine++;
}
cout << "}" << endl;
src++;
} else if (line.getLink() == "f") {
// the face definitions
DrawBuffer::DBufferEntry face;
int link = 0,
iter = 0,
vertices = 0;
Chain faceDef;
Chain faceLine = line.c_str();
faceLine.setDelimiters(" \t");
GLfloat * current;
faceLine++; // exhaust 'f'
face.useTex = -1.f;
face.colorR = rand() / (float) (rand() + 1);
face.colorG = rand() / (float) (rand() + 1);
face.colorB = rand() / (float) (rand() + 1);
face.colorA = 1.f;
face.texX = -99;
face.texY = -98;
cout << "read face |src = " << faceLine << endl;
while(faceLine.linksLeft()) {
vertices++;
faceDef = faceLine.getLink();
faceDef.setDelimiters("/");
link = 0;
while(faceDef.linksLeft()) {
token = faceDef.getLink().c_str();
iter = atoi(token.c_str()) -1;
if (link == 0) {// vertices
current = &OBJvertexList[iter*4];
face.x = current[0];
face.y = current[1];
face.z = current[2];
face.w = current[3];
cout << "added vertex {" <<
face.x << ", " <<
face.y << ", " <<
face.z << ", " <<
face.w << " } src = " << token << endl;
}
if (link == 1) { //texCoords
current = &OBJtexCoords[iter*2];
face.texX = current[0];
face.texY = current[1];
//face.useTex = 1.f;
cout << "added texture coord {" <<
face.texX << ", " <<
face.texY << ", " << " } src = " << token << endl;
}
if (link == 2) { // normals
cout << "Would have read normal (src = " << token << ")" << endl;
}
link++;
faceDef++;
}
faceLine++;
data.push_back(face);
}
if (vertices == 3) {
drawMode = GL_TRIANGLES;
} else {
drawMode = GL_QUADS;
}
src++;
} else if (line.getLink() == "mtllib"){
// material library external file
// loadMaterial(filename);
// add material properties to vertexData
/// so texture names, light reflection vals, etc.
/// when Graphics gets a well-formed vertexStream,
/// it will store the textures
src++;
} else if (line.getLink() == "usemtl") {
// material external file
src++;
} else if (line.getLink() == "s") {
src++;
} else if (line.getLink() == "o") {
src++;
} else if (line.getLink() == "vp") {
src++;
} else {
Chain out;
out << "Unexpected string " << src.getLink() << ". Failed to load OBJ\n";
cout << endl << "Unexpected string " << src.getLink().c_str() << ". Failed to load OBJ" << endl;
return out;
}
}
return "";
}
Chain VertexStream::readPly(const Chain & fname) {
InputBuffer in(fname.c_str());
Chain src = in.readString(in.get_Size()).c_str();
int stage = 0;
Chain format = "ascii";
Chain version = "0.f";
Chain comments = "";
vector<vector<GLfloat>> properties;
vector<Chain> propertyNames;
vector<vector<GLfloat>> elements;
vector<Chain> elementNames;
int curElement = 0;
// header
if (src.getLink() != "ply") {
return ("Header incorrect. Missing \" ply \".");
}
src++;
while (stage == 0 && src.linksLeft()) {
Chain curToken = src.getLink(); src++;
// reading format
if (curToken == "format") {
if (src.getLink() != "ascii" ||
src.getLink() != "binary_big_endian" ||
src.getLink() != "binary_little_endian") {
Chain out = "Header error: incorrect or unsupported format listed";
out += src.getLink();
} else {
format = src.getLink();
}
src++;
version = src.getLink(); src++;
} else if (curToken == "comment") {
// comments appended to one text buffer
comments += src.getLink(); src++;
} else if (curToken == "element") {
// element <element name> <num entries>
// can use the num entries to spot check the element list later
curElement = elementNames.size();
elementNames.push_back(src.getLink()); src++;
int size = atoi(src.getLink());
elements.push_back(vector<GLfloat>(size));
} else if (curToken == "property") {
// a propoerty is always of the currently defined element
}
}
return "";
}