public override void ReadData(Scene scene, BinaryReader stream)
{
// Note: A max face is three indices and
// a flag short.
// Read number of faces.
short faceCount = 0;
faceCount = stream.ReadInt16();
// Read each face and add it.
for (short i = 0; i < faceCount; i++)
{
Face f = new Face();
Index index = new Index(stream.ReadInt16());
f.Indices.Add(index);
index = new Index(stream.ReadInt16());
f.Indices.Add(index);
index = new Index(stream.ReadInt16());
f.Indices.Add(index);
stream.ReadInt16();
faces.Add(f);
}
}
public Scene LoadData(string path)
{
char[] split = new char[] { ' ' };
// Create a scene and polygon.
Scene scene = new Scene();
Polygon polygon = new Polygon();
string mtlName = null;
// Create a stream reader.
using (StreamReader reader = new StreamReader(path))
{
// Read line by line.
string line = null;
while ((line = reader.ReadLine()) != null)
{
// Skip any comments (lines that start with '#').
if (line.StartsWith("#"))
continue;
// Do we have a texture coordinate?
if (line.StartsWith("vt"))
{
// Get the texture coord strings.
string[] values = line.Substring(3).Split(split, StringSplitOptions.RemoveEmptyEntries);
// Parse texture coordinates.
float u = float.Parse(values[0]);
float v = float.Parse(values[1]);
// Add the texture coordinate.
polygon.UVs.Add(new UV(u, v));
continue;
}
// Do we have a normal coordinate?
if (line.StartsWith("vn"))
{
// Get the normal coord strings.
string[] values = line.Substring(3).Split(split, StringSplitOptions.RemoveEmptyEntries);
// Parse normal coordinates.
float x = float.Parse(values[0]);
float y = float.Parse(values[1]);
float z = float.Parse(values[2]);
// Add the normal.
polygon.Normals.Add(new Vertex(x, y, z));
continue;
}
// Do we have a vertex?
if (line.StartsWith("v"))
{
// Get the vertex coord strings.
string[] values = line.Substring(2).Split(split, StringSplitOptions.RemoveEmptyEntries);
// Parse vertex coordinates.
float x = float.Parse(values[0]);
float y = float.Parse(values[1]);
float z = float.Parse(values[2]);
// Add the vertices.
polygon.Vertices.Add(new Vertex(x, y, z));
continue;
}
// Do we have a face?
if (line.StartsWith("f"))
{
Face face = new Face();
if (!String.IsNullOrWhiteSpace(mtlName))
face.Material = scene.Assets.Where(t => t.Name == mtlName).FirstOrDefault() as Material;
// Get the face indices
string[] indices = line.Substring(2).Split(split,
StringSplitOptions.RemoveEmptyEntries);
// Add each index.
foreach (var index in indices)
{
// Split the parts.
string[] parts = index.Split(new char[] { '/' }, StringSplitOptions.None);
// Add each part.
face.Indices.Add(new Index(
(parts.Length > 0 && parts[0].Length > 0) ? int.Parse(parts[0]) - 1 : -1,
(parts.Length > 1 && parts[1].Length > 0) ? int.Parse(parts[1]) - 1 : -1,
(parts.Length > 2 && parts[2].Length > 0) ? int.Parse(parts[2]) - 1 : -1));
}
// Add the face.
polygon.Faces.Add(face);
continue;
}
if (line.StartsWith("mtllib"))
{
// Set current directory in case a relative path to material file is used.
Environment.CurrentDirectory = Path.GetDirectoryName(path);
// Load materials file.
string mtlPath = ReadMaterialValue(line);
LoadMaterials(mtlPath, scene);
}
if (line.StartsWith("usemtl"))
mtlName = ReadMaterialValue(line);
}
}
scene.SceneContainer.AddChild(polygon);
return scene;
}
/// <summary>
/// This function reads a polygon.
/// </summary>
/// <param name="reader"></param>
/// <returns></returns>
protected override object ReadData(BinaryReader reader)
{
// Create a polygon.
Polygon poly = new Polygon();
// Read a name chunk.
CaligariName name = new CaligariName();
name.Read(reader);
poly.Name = name.name;
// Read the local axies.
CaligariAxies axies = new CaligariAxies();
axies.Read(reader);
poly.Transformation.TranslateX = axies.centre.X;
poly.Transformation.TranslateY = axies.centre.Y;
poly.Transformation.TranslateZ = axies.centre.Z;
// poly.Rotate = axies.rotate;
// Read the position matrix.
CaligariPosition pos = new CaligariPosition();
pos.Read(reader);
// Read number of verticies.
int verticesCount = reader.ReadInt32();
// Get them all
for (int i = 0; i < verticesCount; i++)
{
// Read a vertex.
Vertex vertex = new Vertex(reader.ReadSingle(), reader.ReadSingle(), reader.ReadSingle());
// Multiply it by the position matrix.
vertex = vertex * pos.matrix;
// Add it.
poly.Vertices.Add(vertex);
}
// Read UV count.
int uvsCount = reader.ReadInt32();
// Read all of the UVs
for (int i = 0; i < uvsCount; i++)
poly.UVs.Add(new UV(reader.ReadInt32(), reader.ReadInt32()));
// Read faces count.
int faces = reader.ReadInt32();
// Read each face.
for (int f = 0; f < faces; f++)
{
Face face = new Face();
poly.Faces.Add(face);
// Read face type flags.
byte flags = reader.ReadByte();
// Read vertex count
short verticesInFace = reader.ReadInt16();
// Do we read a material number?
if ((flags & 0x08) == 0) // is it a 'hole' face?
reader.ReadInt16();
// Now read the indices, a vertex index and a uv index.
for (short j = 0; j < verticesInFace; j++)
face.Indices.Add(new Index(reader.ReadInt32(), reader.ReadInt32()));
}
// Any extra stuff?
if (header.minorVersion > 4)
{
// read flags.
reader.ReadChars(4);
if ((header.minorVersion > 5) && (header.minorVersion < 8))
reader.ReadChars(2);
}
// Now that we've loaded the polygon, we triangulate it.
poly.Triangulate();
// Finally, we update normals.
poly.Validate(true);
return poly;
}
