private void BuildMeshes(OptFile opt)
{
this.meshes = null;
if (opt == null)
{
return;
}
this.meshes = new MeshGeometry3D[opt.Meshes.Count][][][];
for (int meshIndex = 0; meshIndex < opt.Meshes.Count; meshIndex++)
{
var mesh = opt.Meshes[meshIndex];
var positions = new Point3DCollection(
mesh.Vertices
.Select(t => new Point3D(-t.Y, -t.X, t.Z)));
var normals = new Vector3DCollection(
mesh.VertexNormals
.Select(t => new Vector3D(-t.Y, -t.X, t.Z)));
var textureCoordinates = new PointCollection(
mesh.TextureCoordinates
.Select(t => new Point(t.U, -t.V)));
this.meshes[meshIndex] = new MeshGeometry3D[mesh.Lods.Count][][];
for (int lodIndex = 0; lodIndex < mesh.Lods.Count; lodIndex++)
{
var lod = mesh.Lods[lodIndex];
this.meshes[meshIndex][lodIndex] = new MeshGeometry3D[lod.FaceGroups.Count][];
for (int faceGroupIndex = 0; faceGroupIndex < lod.FaceGroups.Count; faceGroupIndex++)
{
var faceGroup = lod.FaceGroups[faceGroupIndex];
MeshGeometry3D[] geometries = new MeshGeometry3D[faceGroup.Faces.Count + 1];
for (int faceIndex = 0; faceIndex < faceGroup.Faces.Count; faceIndex++)
{
var face = faceGroup.Faces[faceIndex];
MeshGeometry3D geometry = new MeshGeometry3D();
int index = 0;
Indices positionsIndex = face.VerticesIndex;
Indices normalsIndex = face.VertexNormalsIndex;
Indices textureCoordinatesIndex = face.TextureCoordinatesIndex;
geometry.Positions.Add(positions.ElementAtOrDefault(positionsIndex.A));
geometry.Normals.Add(normals.ElementAtOrDefault(normalsIndex.A));
geometry.TextureCoordinates.Add(textureCoordinates.ElementAtOrDefault(textureCoordinatesIndex.A));
geometry.TriangleIndices.Add(index);
index++;
geometry.Positions.Add(positions.ElementAtOrDefault(positionsIndex.B));
geometry.Normals.Add(normals.ElementAtOrDefault(normalsIndex.B));
geometry.TextureCoordinates.Add(textureCoordinates.ElementAtOrDefault(textureCoordinatesIndex.B));
geometry.TriangleIndices.Add(index);
index++;
geometry.Positions.Add(positions.ElementAtOrDefault(positionsIndex.C));
geometry.Normals.Add(normals.ElementAtOrDefault(normalsIndex.C));
geometry.TextureCoordinates.Add(textureCoordinates.ElementAtOrDefault(textureCoordinatesIndex.C));
geometry.TriangleIndices.Add(index);
index++;
if (positionsIndex.D >= 0)
{
geometry.TriangleIndices.Add(index - 3);
geometry.TriangleIndices.Add(index - 1);
geometry.Positions.Add(positions.ElementAtOrDefault(positionsIndex.D));
geometry.Normals.Add(normals.ElementAtOrDefault(normalsIndex.D));
geometry.TextureCoordinates.Add(textureCoordinates.ElementAtOrDefault(textureCoordinatesIndex.D));
geometry.TriangleIndices.Add(index);
index++;
}
geometry.Freeze();
geometries[1 + faceIndex] = geometry;
}
MeshGeometry3D geometryGroup = new MeshGeometry3D();
for (int i = 1; i < geometries.Length; i++)
{
MergeGeometry(geometryGroup, geometries[i]);
}
geometryGroup.Freeze();
geometries[0] = geometryGroup;
this.meshes[meshIndex][lodIndex][faceGroupIndex] = geometries;
}
}
}
}