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 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);
}
}
// Constructors.
public Index(Index index) { vertex = index.vertex; uv = index.uv; }
/// <summary>
/// This function subdivides the faces of this polygon.
/// </summary>
/// <param name="smooth">If set to true the faces will be smoothed.</param>
/// <returns>The number of faces in the new subdivided polygon.</returns>
public int Subdivide()
{
FaceCollection newFaces = new FaceCollection();
foreach(Face face in Faces)
{
// Make sure the face is a triangle.
if(face.Count != 3)
continue;
// Now get the vertices of the face.
Vertex v1 = Vertices[face.Indices[0].Vertex];
Vertex v2 = Vertices[face.Indices[1].Vertex];
Vertex v3 = Vertices[face.Indices[2].Vertex];
// Add the vertices to get a the midpoint of the edge formed by those
// vectors.
Vertex vMidpoint = (v1 + v2 + v3) / 3;
Index iMidpoint = new Index(Vertices.Add(vMidpoint));
// Now make three new faces from the old vertices and the midpoint.
Face newFace = new Face();
newFace.Indices.Add(new Index(face.Indices[0]));
newFace.Indices.Add(new Index(face.Indices[1]));
newFace.Indices.Add(iMidpoint);
newFaces.Add(newFace);
newFace = new Face();
newFace.Indices.Add(new Index(face.Indices[1]));
newFace.Indices.Add(new Index(face.Indices[2]));
newFace.Indices.Add(iMidpoint);
newFaces.Add(newFace);
newFace = new Face();
newFace.Indices.Add(new Index(face.Indices[2]));
newFace.Indices.Add(new Index(face.Indices[0]));
newFace.Indices.Add(iMidpoint);
newFaces.Add(newFace);
}
faces = newFaces;
return faces.Count;
}
