private static ObjModel OrganizeModels(ObjModel model)
{
ObjModel result = new ObjModel();
result.positionList = model.positionList;
result.normalList.AddRange(model.normalList);
bool hasUV = model.uvList.Count > 0;
if (hasUV)
{
result.uvList.AddRange(model.uvList);
}
for (int i = 0; i < model.innerFaceList.Count; i++)
{
var face = model.innerFaceList[i];
var tuple = new Tuple <int, int, int>(face.vertex0.position, face.vertex1.position, face.vertex2.position);
result.faceList.Add(tuple);
if (face.vertex0.normal > 0)
{
result.normalList[face.vertex0.position - 1] = model.normalList[face.vertex0.normal - 1];
}
if (face.vertex1.normal > 0)
{
result.normalList[face.vertex1.position - 1] = model.normalList[face.vertex1.normal - 1];
}
if (face.vertex2.normal > 0)
{
result.normalList[face.vertex2.position - 1] = model.normalList[face.vertex2.normal - 1];
}
if (hasUV)
{
if (face.vertex0.uv > 0)
{
result.uvList[face.vertex0.position - 1] = model.uvList[face.vertex0.uv - 1];
}
if (face.vertex1.uv > 0)
{
result.uvList[face.vertex1.position - 1] = model.uvList[face.vertex1.uv - 1];
}
if (face.vertex2.uv > 0)
{
result.uvList[face.vertex2.position - 1] = model.uvList[face.vertex2.uv - 1];
}
}
result.faceList.Add(new Tuple <int, int, int>(face.vertex0.position, face.vertex1.position, face.vertex2.position));
//result.faceList[i] = new Tuple<int, int, int>(face.vertex0.position, face.vertex1.position, face.vertex2.position);
}
//model.innerFaceList.Clear();
return(result);
}
private static ObjModel OrganizeModels(ObjModel model)
{
ObjModel result = new ObjModel();
result.positionList = model.positionList;
result.normalList.AddRange(model.normalList);
bool hasUV = model.uvList.Count > 0;
if (hasUV)
{
result.uvList.AddRange(model.uvList);
}
for (int i = 0; i < model.innerFaceList.Count; i++)
{
var face = model.innerFaceList[i];
var tuple = new Tuple<int, int, int>(face.vertex0.position, face.vertex1.position, face.vertex2.position);
result.faceList.Add(tuple);
if (face.vertex0.normal > 0)
result.normalList[face.vertex0.position - 1] = model.normalList[face.vertex0.normal - 1];
if (face.vertex1.normal > 0)
result.normalList[face.vertex1.position - 1] = model.normalList[face.vertex1.normal - 1];
if (face.vertex2.normal > 0)
result.normalList[face.vertex2.position - 1] = model.normalList[face.vertex2.normal - 1];
if (hasUV)
{
if (face.vertex0.uv > 0)
result.uvList[face.vertex0.position - 1] = model.uvList[face.vertex0.uv - 1];
if (face.vertex1.uv > 0)
result.uvList[face.vertex1.position - 1] = model.uvList[face.vertex1.uv - 1];
if (face.vertex2.uv > 0)
result.uvList[face.vertex2.position - 1] = model.uvList[face.vertex2.uv - 1];
}
result.faceList.Add(new Tuple<int, int, int>(face.vertex0.position, face.vertex1.position, face.vertex2.position));
//result.faceList[i] = new Tuple<int, int, int>(face.vertex0.position, face.vertex1.position, face.vertex2.position);
}
//model.innerFaceList.Clear();
return result;
}
private static void GenNormals(ObjModel model)
{
if (model.normalList.Count > 0)
{
return;
}
var faceNormals = new vec3[model.innerFaceList.Count];
model.normalList.AddRange(new vec3[model.positionList.Count]);
for (int i = 0; i < model.innerFaceList.Count; i++)
{
var face = model.innerFaceList[i];
vec3 vertex0 = model.positionList[face.vertex0.position - 1];
vec3 vertex1 = model.positionList[face.vertex1.position - 1];
vec3 vertex2 = model.positionList[face.vertex2.position - 1];
vec3 v1 = vertex0 - vertex2;
vec3 v2 = vertex2 - vertex1;
faceNormals[i] = v1.cross(v2);
}
for (int i = 0; i < model.positionList.Count; i++)
{
vec3 sum = new vec3();
int shared = 0;
for (int j = 0; j < model.innerFaceList.Count; j++)
{
var face = model.innerFaceList[j];
if (face.vertex0.position - 1 == i || face.vertex1.position - 1 == i || face.vertex2.position - 1 == i)
{
sum = sum + faceNormals[i];
shared++;
}
}
if (shared > 0)
{
sum = (sum / shared).normalize();
}
model.normalList[i] = sum;
}
}
private static void LoadModels(string filename, ObjFile file)
{
using (var sr = new StreamReader(filename))
{
var model = new ObjModel();
while (!sr.EndOfStream)
{
string line = sr.ReadLine();
string[] parts = line.Split(separator, StringSplitOptions.RemoveEmptyEntries);
if (parts[0] == ("v"))
{
if (model.innerFaceList.Count > 0)
{
file.models.Add(model);
model = new ObjModel();
}
vec3 position = new vec3(float.Parse(parts[1]), float.Parse(parts[2]), float.Parse(parts[3]));
model.positionList.Add(position);
}
else if (parts[0] == ("vt"))
{
vec2 uv = new vec2(float.Parse(parts[1]), float.Parse(parts[2]));
model.uvList.Add(uv);
}
else if (parts[0] == ("vn"))
{
vec3 normal = new vec3(float.Parse(parts[1]), float.Parse(parts[2]), float.Parse(parts[3]));
model.normalList.Add(normal);
}
else if (parts[0] == ("f"))
{
Triangle triangle = ParseFace(parts);
model.innerFaceList.Add(triangle);
}
}
file.models.Add(model);
}
}
public ObjModelElement(ObjModel objModel)
{
this.objModelAdapter = new ObjModelAdpater(objModel);
}
private static void GenNormals(ObjModel model)
{
if (model.normalList.Count > 0) { return; }
var faceNormals = new vec3[model.innerFaceList.Count];
model.normalList.AddRange(new vec3[model.positionList.Count]);
for (int i = 0; i < model.innerFaceList.Count; i++)
{
var face = model.innerFaceList[i];
vec3 vertex0 = model.positionList[face.vertex0.position - 1];
vec3 vertex1 = model.positionList[face.vertex1.position - 1];
vec3 vertex2 = model.positionList[face.vertex2.position - 1];
vec3 v1 = vertex0 - vertex2;
vec3 v2 = vertex2 - vertex1;
faceNormals[i] = v1.cross(v2);
}
for (int i = 0; i < model.positionList.Count; i++)
{
vec3 sum = new vec3();
int shared = 0;
for (int j = 0; j < model.innerFaceList.Count; j++)
{
var face = model.innerFaceList[j];
if (face.vertex0.position - 1 == i || face.vertex1.position - 1 == i || face.vertex2.position - 1 == i)
{
sum = sum + faceNormals[i];
shared++;
}
}
if (shared > 0)
{
sum = sum / shared;
sum.Normalize();
}
model.normalList[i] = sum;
}
}
private static void LoadModels(string filename, ObjFile file)
{
using (var sr = new StreamReader(filename))
{
var model = new ObjModel();
while (!sr.EndOfStream)
{
string line = sr.ReadLine();
string[] parts = line.Split(separator, StringSplitOptions.RemoveEmptyEntries);
if (parts[0] == ("v"))
{
if (model.innerFaceList.Count > 0)
{
file.models.Add(model);
model = new ObjModel();
}
vec3 position = new vec3(float.Parse(parts[1]), float.Parse(parts[2]), float.Parse(parts[3]));
model.positionList.Add(position);
}
else if (parts[0] == ("vt"))
{
vec2 uv = new vec2(float.Parse(parts[1]), float.Parse(parts[2]));
model.uvList.Add(uv);
}
else if (parts[0] == ("vn"))
{
vec3 normal = new vec3(float.Parse(parts[1]), float.Parse(parts[2]), float.Parse(parts[3]));
model.normalList.Add(normal);
}
else if (parts[0] == ("f"))
{
Triangle triangle = ParseFace(parts);
model.innerFaceList.Add(triangle);
}
}
file.models.Add(model);
}
}
