public MeshCoreData.Part CreateMeshPart(OBJGroup.SubObject sub)
{
if (sub.Faces.Count == 0)
{
return(null);
}
Vector3[] positions = new Vector3[sub.Faces.Count * 3];
Vector3[] normals = new Vector3[sub.Faces.Count * 3];
Vector2[] texcoords = new Vector2[sub.Faces.Count * 3];
// Note that faces are flipped in this piece of code!!!
for (int k = 0; k < sub.Faces.Count; k++)
{
var face = sub.Faces[k];
positions[k * 3 + 0] = importer.Vertices[face.V1.Position];
positions[k * 3 + 1] = importer.Vertices[face.V3.Position];
positions[k * 3 + 2] = importer.Vertices[face.V2.Position];
normals[k * 3 + 0] = importer.Normals[face.V1.Normal];
normals[k * 3 + 1] = importer.Normals[face.V3.Normal];
normals[k * 3 + 2] = importer.Normals[face.V2.Normal];
texcoords[k * 3 + 0] = new Vector2(importer.TexCoords[face.V1.TextureCoordinate].X,
1 - importer.TexCoords[face.V1.TextureCoordinate].Y);
texcoords[k * 3 + 1] = new Vector2(importer.TexCoords[face.V3.TextureCoordinate].X,
1 - importer.TexCoords[face.V3.TextureCoordinate].Y);
texcoords[k * 3 + 2] = new Vector2(importer.TexCoords[face.V2.TextureCoordinate].X,
1 - importer.TexCoords[face.V2.TextureCoordinate].Y);
}
TangentSolver solver = new TangentSolver();
var tangents =
solver.GenerateTangents(positions, normals, texcoords).Select(f => new Vector3(f.X, f.Y, f.Z)).ToArray();
var positionsSource = new MeshPartGeometryData.Source();
positionsSource.DataVector3 = positions;
positionsSource.Semantic = MeshPartGeometryData.Semantic.Position;
var normalsSource = new MeshPartGeometryData.Source();
normalsSource.DataVector3 = normals;
normalsSource.Semantic = MeshPartGeometryData.Semantic.Normal;
var texcoordsSource = new MeshPartGeometryData.Source();
texcoordsSource.DataVector2 = texcoords;
texcoordsSource.Semantic = MeshPartGeometryData.Semantic.Texcoord;
var tangentsSource = new MeshPartGeometryData.Source();
tangentsSource.DataVector3 = tangents;
tangentsSource.Semantic = MeshPartGeometryData.Semantic.Tangent;
var part = new MeshCoreData.Part();
part.MeshMaterial = materials[sub.Material];
var meshPart = new RAMMeshPart();
meshPart.GetGeometryData().Sources.Add(positionsSource);
meshPart.GetGeometryData().Sources.Add(normalsSource);
meshPart.GetGeometryData().Sources.Add(texcoordsSource);
meshPart.GetGeometryData().Sources.Add(tangentsSource);
part.MeshPart = meshPart;
part.ObjectMatrix = Matrix.Identity;
return(part);
}
private void convertSubObjectRenderPart(RAMMesh mesh, OBJGroup.SubObject sub, ObjImporter importer, Dictionary <OBJMaterial, MeshCoreData.Material> materials)
{
if (sub.Faces.Count == 0)
{
return;
}
var meshCoreData = mesh.GetCoreData();
Vector3[] positions = new Vector3[sub.Faces.Count * 3];
Vector3[] normals = new Vector3[sub.Faces.Count * 3];
Vector2[] texcoords = new Vector2[sub.Faces.Count * 3];
for (int k = 0; k < sub.Faces.Count; k++)
{
var face = sub.Faces[k];
positions[k * 3 + 0] = importer.Vertices[face.V1.Position];
positions[k * 3 + 1] = importer.Vertices[face.V2.Position];
positions[k * 3 + 2] = importer.Vertices[face.V3.Position];
normals[k * 3 + 0] = importer.Normals[face.V1.Normal];
normals[k * 3 + 1] = importer.Normals[face.V2.Normal];
normals[k * 3 + 2] = importer.Normals[face.V3.Normal];
texcoords[k * 3 + 0] = new Vector2(importer.TexCoords[face.V1.TextureCoordinate].X, 1 - importer.TexCoords[face.V1.TextureCoordinate].Y);
texcoords[k * 3 + 1] = new Vector2(importer.TexCoords[face.V2.TextureCoordinate].X, 1 - importer.TexCoords[face.V2.TextureCoordinate].Y);
texcoords[k * 3 + 2] = new Vector2(importer.TexCoords[face.V3.TextureCoordinate].X, 1 - importer.TexCoords[face.V3.TextureCoordinate].Y);
}
TangentSolver solver = new TangentSolver();
var tangents = solver.GenerateTangents(positions, normals, texcoords).Select(f => new Vector3(f.X, f.Y, f.Z)).ToArray();
var positionsSource = new MeshPartGeometryData.Source();
positionsSource.DataVector3 = positions;
positionsSource.Semantic = MeshPartGeometryData.Semantic.Position;
var normalsSource = new MeshPartGeometryData.Source();
normalsSource.DataVector3 = normals;
normalsSource.Semantic = MeshPartGeometryData.Semantic.Normal;
var texcoordsSource = new MeshPartGeometryData.Source();
texcoordsSource.DataVector2 = texcoords;
texcoordsSource.Semantic = MeshPartGeometryData.Semantic.Texcoord;
var tangentsSource = new MeshPartGeometryData.Source();
tangentsSource.DataVector3 = tangents;
tangentsSource.Semantic = MeshPartGeometryData.Semantic.Tangent;
var part = new MeshCoreData.Part();
part.MeshMaterial = materials[sub.Material];
var meshPart = new RAMMeshPart();
meshPart.GetGeometryData().Sources.Add(positionsSource);
meshPart.GetGeometryData().Sources.Add(normalsSource);
meshPart.GetGeometryData().Sources.Add(texcoordsSource);
meshPart.GetGeometryData().Sources.Add(tangentsSource);
part.MeshPart = meshPart;
part.ObjectMatrix = Matrix.Identity;
meshCoreData.Parts.Add(part);
}