Original Post
hi, I have been trying to write a 3D asteroid hunting space simulation, however I have serious problems with importing my spaceship. I have modeled it with Maya and exported it with polytrans plug-in. I have tried open-source obj import libraries but my ship looked a little bit deformed once I displayed it. Then I have written my importer code, and for simplicity I have only written code for importing vertices, faces and vertex normals. But it again displayed deformed, as if some faces are defined wrong. But I don't think my library or open-source library I have used have problems, and also I don't think Maya and the plug-in have problems with exporting the obj file. Does anyone know where the problem should be? is there a process that I should do after exporting the file? btw, here is my simple obj importer code:
[/source
int LoadObjFileToClass(char* filename, object* ObjClass) {
std::ifstream ObjFile(filename);
if(!ObjFile.is_open())
return NULL;
//yuzey, vertex vs. sayilarini say
std::string line, sub; //bir satir maksimum 80 karakter
int numVertex = 0, numFace = 0, numNormal = 0;
while(getline(ObjFile, line)) {
sub = line.substr(0,2);
if(sub == "v ")
numVertex++;
else if(sub == "f ")
numFace++;
else if(sub == "vn")
numNormal++;
}
//gerekli yerleri tahsis et atamalari yap
ObjClass->LocalVertices = new Vertex3D[numVertex];
ObjClass->Faces = new Facet[numFace];
ObjClass->Normals = new Normal[numNormal];
ObjClass->NumVertices = numVertex;
ObjClass->NumFaces = numFace;
ObjClass->NumNormals = numNormal;
ObjFile.close();
std::ifstream ObjFile2(filename);
int vertex = 0, face = 0, normal = 0;
int vi1, vi2, vi3, ni1, ni2, ni3, vt1, vt2, vt3;
float x, y, z;
while(getline(ObjFile2, line)) {
const char* FormattedLine = line.c_str();
sub = line.substr(0,2);
std::string empty;
if(sub == "v ") {
//string vertex tanimliyor
sscanf(FormattedLine, "%s %f %f %f", ∅, &x, &y, &z);
ObjClass->LocalVertices[vertex].x = x;
ObjClass->LocalVertices[vertex].y = y;
ObjClass->LocalVertices[vertex].z = z;
vertex++;
}
else if(sub == "f ") {
sscanf(FormattedLine, "%s %d/%d/%d %d/%d/%d %d/%d/%d", ∅,
&vi1, &vt1, &ni1,
&vi2, &vt2, &ni2,
&vi3, &vt3, &ni3);
ObjClass->Faces[face].VertexIndices[0] = vi1;
ObjClass->Faces[face].VertexIndices[1] = vi2;
ObjClass->Faces[face].VertexIndices[2] = vi3;
ObjClass->Faces[face].Normals[0] = ni1;
ObjClass->Faces[face].Normals[1] = ni2;
ObjClass->Faces[face].Normals[2] = ni3;
face++;
}
else if(sub == "vn") {
sscanf(FormattedLine, "%s %f %f %f", ∅, &x, &y, &z);
ObjClass->LocalVertices[vertex].x = x;
ObjClass->LocalVertices[vertex].y = y;
ObjClass->LocalVertices[vertex].z = z;
normal++;
}
}
return true;
}]
