/// <summary>
/// Loads a model from a file.
/// </summary>
/// <param name="filename">File to load model from</param>
/// <returns>ObjVolume of loaded model</returns>
public static ObjVolume LoadFromFile(string filename)
{
ObjVolume obj = new ObjVolume();
try
{
using (StreamReader reader = new StreamReader(new FileStream(filename, FileMode.Open, FileAccess.Read)))
{
obj = LoadFromString(reader.ReadToEnd());
}
}
catch (FileNotFoundException e)
{
Console.WriteLine("File not found: {0}", filename);
}
catch (Exception e)
{
Console.WriteLine("Error loading file: {0}.\n{1}", filename, e);
}
return(obj);
}
void initProgram()
{
lastMousePos = new Vector2(Mouse.X, Mouse.Y);
GL.GenBuffers(1, out ibo_elements);
// Load shaders from file
shaders.Add("default", new ShaderProgram("vs.glsl", "fs.glsl", true));
shaders.Add("textured", new ShaderProgram("vs_tex.glsl", "fs_tex.glsl", true));
shaders.Add("normal", new ShaderProgram("vs_norm.glsl", "fs_norm.glsl", true));
shaders.Add("lit", new ShaderProgram("vs_lit.glsl", "fs_lit.glsl", true));
activeShader = "lit";
loadMaterials("opentk.mtl");
loadMaterials("police.mtl");
// Create our objects
TexturedCube tc = new TexturedCube();
tc.TextureID = textures[materials["opentk1"].DiffuseMap];
tc.CalculateNormals();
tc.Material = materials["opentk1"];
objects.Add(tc);
TexturedCube tc2 = new TexturedCube();
tc2.Position += new Vector3(1f, 1f, 1f);
tc2.TextureID = textures[materials["opentk2"].DiffuseMap];
tc2.CalculateNormals();
tc2.Material = materials["opentk2"];
objects.Add(tc2);
// Move camera away from origin
textures.Add("earth.png", loadImage("earth.png"));
ObjVolume earth = ObjVolume.LoadFromFile("earth.obj");
earth.TextureID = textures["earth.png"];
earth.Position += new Vector3(1f, 1f, -2f);
earth.Material = new Material(new Vector3(0.15f), new Vector3(1), new Vector3(0.2f), 5);
objects.Add(earth);
textures.Add("police.jpg", loadImage("police.jpg"));
ObjVolume car = ObjVolume.LoadFromFile("police.obj");
car.TextureID = textures["police.jpg"];
car.Position += new Vector3(1f, 1f, -4f);
car.Material = materials["opentk1"];
car.Name = "Police";
objects.Add(car);
textures.Add("tank.png", loadImage("tank.png"));
ObjVolume tank = ObjVolume.LoadFromFile("tank.obj");
tank.TextureID = textures["tank.png"];
tank.Position += new Vector3(1f, 1f, -5f);
tank.Material = materials["opentk1"];
tank.Name = "Tank";
objects.Add(tank);
}
public static ObjVolume LoadFromString(string obj)
{
// Seperate lines from the file
List <String> lines = new List <string>(obj.Split('\n'));
// Lists to hold model data
List <Vector3> verts = new List <Vector3>();
List <Vector3> normals = new List <Vector3>();
List <Vector2> texs = new List <Vector2>();
List <Tuple <TempVertex, TempVertex, TempVertex> > faces = new List <Tuple <TempVertex, TempVertex, TempVertex> >();
// Base values
verts.Add(new Vector3());
texs.Add(new Vector2());
normals.Add(new Vector3());
int currentindice = 0;
// Read file line by line
foreach (String line in lines)
{
if (line.StartsWith("v ")) // Vertex definition
{
// Cut off beginning of line
String temp = line.Substring(2);
Vector3 vec = new Vector3();
if (temp.Trim().Count((char c) => c == ' ') == 2) // Check if there's enough elements for a vertex
{
String[] vertparts = temp.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
// Attempt to parse each part of the vertice
bool success = float.TryParse(vertparts[0], NumberStyles.Float, CultureInfo.InvariantCulture, out vec.X);
success |= float.TryParse(vertparts[1], NumberStyles.Float, CultureInfo.InvariantCulture, out vec.Y);
success |= float.TryParse(vertparts[2], NumberStyles.Float, CultureInfo.InvariantCulture, out vec.Z);
// If any of the parses failed, report the error
if (!success)
{
Console.WriteLine("Error parsing vertex: {0}", line);
}
}
else
{
Console.WriteLine("Error parsing vertex: {0}", line);
}
verts.Add(vec);
}
else if (line.StartsWith("vt ")) // Texture coordinate
{
// Cut off beginning of line
String temp = line.Substring(2);
Vector2 vec = new Vector2();
if (temp.Trim().Count((char c) => c == ' ') > 0) // Check if there's enough elements for a vertex
{
String[] texcoordparts = temp.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
// Attempt to parse each part of the vertice
bool success = float.TryParse(texcoordparts[0], NumberStyles.Float, CultureInfo.InvariantCulture, out vec.X);
success |= float.TryParse(texcoordparts[1], NumberStyles.Float, CultureInfo.InvariantCulture, out vec.Y);
// If any of the parses failed, report the error
if (!success)
{
Console.WriteLine("Error parsing texture coordinate: {0}", line);
}
}
else
{
Console.WriteLine("Error parsing texture coordinate: {0}", line);
}
texs.Add(vec);
}
else if (line.StartsWith("vn ")) // Normal vector
{
// Cut off beginning of line
String temp = line.Substring(2);
Vector3 vec = new Vector3();
if (temp.Trim().Count((char c) => c == ' ') == 2) // Check if there's enough elements for a normal
{
String[] vertparts = temp.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
// Attempt to parse each part of the vertice
bool success = float.TryParse(vertparts[0], NumberStyles.Float, CultureInfo.InvariantCulture, out vec.X);
success |= float.TryParse(vertparts[1], NumberStyles.Float, CultureInfo.InvariantCulture, out vec.Y);
success |= float.TryParse(vertparts[2], NumberStyles.Float, CultureInfo.InvariantCulture, out vec.Z);
// If any of the parses failed, report the error
if (!success)
{
Console.WriteLine("Error parsing normal: {0}", line);
}
}
else
{
Console.WriteLine("Error parsing normal: {0}", line);
}
normals.Add(vec);
}
else if (line.StartsWith("f ")) // Face definition
{
// Cut off beginning of line
String temp = line.Substring(2);
Tuple <TempVertex, TempVertex, TempVertex> face = new Tuple <TempVertex, TempVertex, TempVertex>(new TempVertex(), new TempVertex(), new TempVertex());
if (temp.Trim().Count((char c) => c == ' ') == 2) // Check if there's enough elements for a face
{
String[] faceparts = temp.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
int v1, v2, v3;
int t1, t2, t3;
int n1, n2, n3;
// Attempt to parse each part of the face
bool success = int.TryParse(faceparts[0].Split('/')[0], NumberStyles.Integer, CultureInfo.InvariantCulture, out v1);
success |= int.TryParse(faceparts[1].Split('/')[0], NumberStyles.Integer, CultureInfo.InvariantCulture, out v2);
success |= int.TryParse(faceparts[2].Split('/')[0], NumberStyles.Integer, CultureInfo.InvariantCulture, out v3);
if (faceparts[0].Count((char c) => c == '/') >= 2)
{
success |= int.TryParse(faceparts[0].Split('/')[1], NumberStyles.Integer, CultureInfo.InvariantCulture, out t1);
success |= int.TryParse(faceparts[1].Split('/')[1], NumberStyles.Integer, CultureInfo.InvariantCulture, out t2);
success |= int.TryParse(faceparts[2].Split('/')[1], NumberStyles.Integer, CultureInfo.InvariantCulture, out t3);
success |= int.TryParse(faceparts[0].Split('/')[2], NumberStyles.Integer, CultureInfo.InvariantCulture, out n1);
success |= int.TryParse(faceparts[1].Split('/')[2], NumberStyles.Integer, CultureInfo.InvariantCulture, out n2);
success |= int.TryParse(faceparts[2].Split('/')[2], NumberStyles.Integer, CultureInfo.InvariantCulture, out n3);
}
else
{
if (texs.Count > v1 && texs.Count > v2 && texs.Count > v3)
{
t1 = v1;
t2 = v2;
t3 = v3;
}
else
{
t1 = 0;
t2 = 0;
t3 = 0;
}
if (normals.Count > v1 && normals.Count > v2 && normals.Count > v3)
{
n1 = v1;
n2 = v2;
n3 = v3;
}
else
{
n1 = 0;
n2 = 0;
n3 = 0;
}
}
// If any of the parses failed, report the error
if (!success)
{
Console.WriteLine("Error parsing face: {0}", line);
}
else
{
TempVertex tv1 = new TempVertex(v1, n1, t1);
TempVertex tv2 = new TempVertex(v2, n2, t2);
TempVertex tv3 = new TempVertex(v3, n3, t3);
face = new Tuple <TempVertex, TempVertex, TempVertex>(tv1, tv2, tv3);
faces.Add(face);
}
}
else
{
Console.WriteLine("Error parsing face: {0}", line);
}
}
}
// Create the ObjVolume
ObjVolume vol = new ObjVolume();
foreach (var face in faces)
{
FaceVertex v1 = new FaceVertex(verts[face.Item1.Vertex], normals[face.Item1.Normal], texs[face.Item1.Texcoord]);
FaceVertex v2 = new FaceVertex(verts[face.Item2.Vertex], normals[face.Item2.Normal], texs[face.Item2.Texcoord]);
FaceVertex v3 = new FaceVertex(verts[face.Item3.Vertex], normals[face.Item3.Normal], texs[face.Item3.Texcoord]);
vol.faces.Add(new Tuple <FaceVertex, FaceVertex, FaceVertex>(v1, v2, v3));
}
return(vol);
}
