private Vector3 CalcFaceNormal(SMMesh mesh, SMTriangle triangle)
{
var v1 = mesh.Vertices[triangle.v1];
var v2 = mesh.Vertices[triangle.v2];
var v3 = mesh.Vertices[triangle.v3];
var UX = v2.Position.X - v1.Position.X;
var UY = v2.Position.Y - v1.Position.Y;
var UZ = v2.Position.Z - v1.Position.Z;
var VX = v3.Position.X - v1.Position.X;
var VY = v3.Position.Y - v1.Position.Y;
var VZ = v3.Position.Z - v1.Position.Z;
var NX = UY * VZ - UZ * VY;
var NY = UZ * VX - UX * VZ;
var NZ = UX * VY - UY * VX;
var len = Math.Sqrt(NX * NX + NY * NY + NZ * NZ);
return(new Vector3
{
X = (float)(NX / len),
Y = (float)(NY / len),
Z = (float)(NZ / len)
});
}
// This REQUIRES a backing CGFX file and doesn't contain enough data to regenerate one from scratch
public SimplifiedModel(CGFX cgfx)
{
this.cgfx = cgfx;
// Models are always the first entry per CGFX standard
var models = cgfx.Data.Entries[0]?.Entries;
// Textures are the second
var textures = cgfx.Data.Entries[1]?.Entries.Select(e => e.EntryObject).Cast <DICTObjTexture>().ToList();
if (textures != null && textures.Count > 0)
{
Textures = new SMTexture[textures.Count];
for (var t = 0; t < textures.Count; t++)
{
Bitmap textureBitmap = null;
var name = textures[t].Name;
var textureData = textures[t];
if (textureData != null)
{
var textureRGBA = TextureCodec.ConvertTextureToRGBA(new Utility(null, null, Endianness.Little), textureData.TextureCGFXData, textureData.TextureFormat, (int)textureData.Width, (int)textureData.Height);
textureBitmap = new Bitmap((int)textureData.Width, (int)textureData.Height, PixelFormat.Format32bppArgb);
var imgData = textureBitmap.LockBits(new Rectangle(0, 0, textureBitmap.Width, textureBitmap.Height), ImageLockMode.WriteOnly, PixelFormat.Format32bppArgb);
Marshal.Copy(textureRGBA, 0, imgData.Scan0, textureRGBA.Length);
textureBitmap.UnlockBits(imgData);
textureBitmap.RotateFlip(RotateFlipType.RotateNoneFlipY);
}
var smTexture = new SMTexture(name, textureBitmap);
Textures[t] = smTexture;
}
}
if (models != null && models.Count > 0)
{
// This probably isn't a difficult problem to work around, but it's out of my scope at this time
if (models.Count != 1)
{
throw new InvalidOperationException("File contains more than one model; only supporting one for now.");
}
var model = (DICTObjModel)models.First().EntryObject;
// NOTE: Currently NOT committing the skeleton back, we're just keeping it for model software
var bones = model.Skeleton?.Bones.Entries.Select(e => e.EntryObject).Cast <DICTObjBone>().ToList() ?? new List <DICTObjBone>();
Bones = bones.Select(b => new SMBone
{
Name = b.Name,
ParentName = b.Parent?.Name,
Rotation = b.Rotation,
Translation = b.Translation,
Scale = b.Scale,
LocalTransform = b.LocalTransform
}).ToArray();
Meshes = new SMMesh[model.Meshes.Length];
for (var m = 0; m < model.Meshes.Length; m++)
{
var mesh = model.Meshes[m];
var shape = model.Shapes[mesh.ShapeIndex];
// There might be some clever way of handling multiple vertex buffers
// (if it actually happens) but I'm not worried about it. Only looking
// for a single one that is VertexBufferInterleaved.
var vertexBuffersInterleaved = shape.VertexBuffers.Where(vb => vb is VertexBufferInterleaved);
if (vertexBuffersInterleaved.Count() != 1)
{
throw new InvalidOperationException("Unsupported count of VertexBuffers in VertexBufferInterleaved format");
}
// Only expecting / supporting 1 SubMesh entry
if (shape.SubMeshes.Count != 1)
{
throw new InvalidOperationException("Unsupported amount of SubMeshes");
}
var subMesh = shape.SubMeshes[0];
// The BoneReferences in the SubMesh are what the vertex's local index references.
var boneReferences = subMesh.BoneReferences;
// These aren't "faces" in the geometrical sense, but rather a header of sorts
if (subMesh.Faces.Count != 1)
{
throw new InvalidOperationException("Unsupported amount of Faces");
}
var faceHeader = subMesh.Faces[0];
// Again, just one FaceDescriptor...
if (faceHeader.FaceDescriptors.Count != 1)
{
throw new InvalidOperationException("Unsupported amount of FaceDescriptors");
}
var faceDescriptor = faceHeader.FaceDescriptors[0];
// We're also only supporting triangles at this point; the model format probably
// allows for more groups of geometry, but again, out of my scope
if (faceDescriptor.PrimitiveMode != FaceDescriptor.PICAPrimitiveMode.Triangles)
{
throw new InvalidOperationException("Only supporting triangles format");
}
// Vertices are stored (in GPU-compatible form)
var vertexBuffer = (VertexBufferInterleaved)vertexBuffersInterleaved.Single();
var vertexBufferIndex = shape.VertexBuffers.IndexOf(vertexBuffer);
var attributes = vertexBuffer.Attributes.Select(a => VertexBufferCodec.PICAAttribute.GetPICAAttribute(a)).ToList();
// The following are the only VertexAttributes we are supporting at this time
var supportedAttributes = new List <VertexBuffer.PICAAttributeName>
{
VertexBuffer.PICAAttributeName.Position,
VertexBuffer.PICAAttributeName.Normal,
VertexBuffer.PICAAttributeName.TexCoord0,
VertexBuffer.PICAAttributeName.BoneIndex,
VertexBuffer.PICAAttributeName.BoneWeight,
// Caution: Vertex color may not be supported by all model editors!
VertexBuffer.PICAAttributeName.Color
};
// Check if any unsupported attributes are in use
var unsupportedAttributes = attributes.Where(a => !supportedAttributes.Contains(a.Name)).Select(a => a.Name);
if (unsupportedAttributes.Any())
{
throw new InvalidOperationException($"This model is using the following unsupported attributes: {string.Join(", ", unsupportedAttributes)}");
}
var nativeVertices = VertexBufferCodec.GetVertices(shape, vertexBufferIndex);
// Convert to the simplified vertices
var boneIndexCount = GetElementsOfAttribute(attributes, VertexBuffer.PICAAttributeName.BoneIndex); // How many bone indices are actually used
var boneWeightCount = GetElementsOfAttribute(attributes, VertexBuffer.PICAAttributeName.BoneWeight); // How many bone weights are actually used
// FIXME? There seems to be, on occasion, a bone relationship that points to
// the entire mesh but not assigned to any of the vertices. So basically the
// vertices are recorded as having no bone indices but in fact are all dependent
// upon associating with bone index 0 (?) This will force it to use at least
// one bone index even if zero is specified for this case.
if (boneReferences != null && boneReferences.Count > 0)
{
boneIndexCount = Math.Max(boneIndexCount, 1);
}
var vertices = nativeVertices.Select(v => new SMVertex
{
Position = new Vector3(v.Position.X, v.Position.Y, v.Position.Z),
Normal = new Vector3(v.Normal.X, v.Normal.Y, v.Normal.Z),
TexCoord = new Vector3(v.TexCoord0.X, v.TexCoord0.Y, v.TexCoord0.Z),
BoneIndices = (new[] { v.Indices.b0, v.Indices.b1, v.Indices.b2, v.Indices.b3 }).Take(boneIndexCount).ToArray(),
Weights = (new[] { v.Weights.w0, v.Weights.w1, v.Weights.w2, v.Weights.w3 }).Take(boneWeightCount).ToArray(),
Color = v.Color // Caution! Not all 3D model editors may support vertex color!
}).ToList();
// The vertices use relative bone indices based on the SubMesh definitions,
// which we're going to make absolute now
for (var v = 0; v < vertices.Count; v++)
{
var vertex = vertices[v];
for (var i = 0; i < vertex.BoneIndices.Length; i++)
{
vertex.BoneIndices[i] = boneReferences[vertex.BoneIndices[i]].Index;
// Also, if no bone weights are available, assign a weight of 1 to the first bone.
// This won't be stored ultimately as the PICA attributes won't specify it.
if (vertex.Weights.Length == 0)
{
vertex.Weights = new float[] { 1.0f };
}
}
}
// Deconstruct into triangle faces
var triangles = new List <SMTriangle>();
var indices = faceDescriptor.Indices;
for (var i = 0; i < indices.Count; i += 3)
{
triangles.Add(new SMTriangle
{
v1 = indices[i + 0],
v2 = indices[i + 1],
v3 = indices[i + 2]
});
}
// Finally, assign material, if available (mostly for the model editor's benefit)
var material = model.ModelMaterials.Entries.Select(e => e.EntryObject).Cast <DICTObjModelMaterial>().ToList()[mesh.MaterialId];
var texture = material.TextureMappers.First().TextureReference;
var name = texture.ReferenceName;
var smTexture = (Textures != null) ? Textures.Where(t => t.Name == name).SingleOrDefault() : null;
if (smTexture == null)
{
smTexture = new SMTexture(name, null);
}
Meshes[m] = new SMMesh(vertices, triangles, shape, vertexBufferIndex, smTexture);
}
}
}