private static MESH_CULLING SerializeMeshCulling(MESH_FILE file, ShaderDataHelper shaderData, MeshCulling meshCulling)
{
var culling = new MESH_CULLING
{
Type = (int)meshCulling.Type,
FromVertex = meshCulling.FromVertex,
VertexCount = meshCulling.VertexCount,
FromIndex = meshCulling.FromIndex,
IndexCount = meshCulling.IndexCount
};
if (meshCulling.ReplacementMesh != null)
{
culling.AlternateMesh = SerializeMeshGeometry(file, shaderData, meshCulling.ReplacementMesh);
}
if (meshCulling.Studs != null && meshCulling.Studs.Any())
{
culling.Studs = meshCulling.Studs.Select(x => x.Serialize()).ToArray();
}
if (meshCulling.AdjacentStuds != null && meshCulling.AdjacentStuds.Any())
{
culling.AdjacentStuds = meshCulling.AdjacentStuds.Select(x => x.Serialize()).ToArray();
}
return(culling);
}
private static MESH_CULLING ReadCullingInfo(BinaryReaderEx br, MESH_FILE meshFile, long boneMappingPosition)
{
long startPosition = br.BaseStream.Position;
int cullingDataSize = br.ReadInt32();
var culling = new MESH_CULLING()
{
Type = br.ReadInt32(),
FromVertex = br.ReadInt32(),
VertexCount = br.ReadInt32(),
FromIndex = br.ReadInt32(),
IndexCount = br.ReadInt32()
};
int alternateMeshOffset = br.ReadInt32();
int connectorReferenceFlag = br.ReadInt32();
if (connectorReferenceFlag >= 1)
{
culling.Studs = ReadCustom2DFieldReferences(br);
}
else
{
culling.Studs = new CUSTOM2DFIELD_REFERENCE[0];
}
if (connectorReferenceFlag >= 2)
{
culling.AdjacentStuds = ReadCustom2DFieldReferences(br);
}
else
{
culling.AdjacentStuds = new CUSTOM2DFIELD_REFERENCE[0];
}
if (connectorReferenceFlag > 2)
{
Trace.WriteLine($"Unexpected connector reference flag: {connectorReferenceFlag}");
}
if (alternateMeshOffset != 0)
{
if (startPosition + alternateMeshOffset != br.BaseStream.Position)
{
Trace.WriteLine("Incorrect data size read");
br.BaseStream.Position = startPosition + alternateMeshOffset;
}
long meshDataSize = cullingDataSize - alternateMeshOffset;
culling.AlternateMesh = ReadAlternateMesh(br, meshFile, boneMappingPosition, meshDataSize);
}
return(culling);
}
private static void SetShaderData(MESH_FILE file, MESH_DATA data, MeshGeometry mesh)
{
for (int i = 0; i < data.Indices.Length; i++)
{
var index = data.Indices[i];
if (index.AverageNormalIndex >= 0 && index.AverageNormalIndex < file.AverageNormals.Length)
{
mesh.Indices[i].AverageNormal = file.AverageNormals[index.AverageNormalIndex];
}
if (file.GetShaderDataFromOffset(index.REShaderOffset, out ROUNDEDGE_SHADER_DATA shaderData))
{
mesh.Indices[i].RoundEdgeData = new RoundEdgeData(shaderData.Coords.Take(6).ToArray());
}
}
}
private static MESH_DATA SerializeMeshGeometry(MESH_FILE file, ShaderDataHelper shaderData, MeshGeometry meshGeometry)
{
var meshData = MESH_DATA.Create(meshGeometry.VertexCount, meshGeometry.IndexCount, file.IsTextured, file.IsFlexible);
var vertIndexer = new ListIndexer <Vertex>(meshGeometry.Vertices);
bool isTextured = meshGeometry.IsTextured;
for (int i = 0; i < meshGeometry.Vertices.Count; i++)
{
var vert = meshGeometry.Vertices[i];
meshData.Positions[i] = vert.Position;
meshData.Normals[i] = vert.Normal;
if (file.IsTextured)
{
meshData.UVs[i] = isTextured ? vert.TexCoord : new Vector2(0f);
}
if (file.IsFlexible && vert.BoneWeights.Any())
{
var boneWeights = vert.BoneWeights.Select(x => new MESH_BONE_WEIGHT {
BoneID = x.BoneID, Weight = x.Weight
});
meshData.Bones[i] = new MESH_BONE_MAPPING(boneWeights);
}
}
for (int i = 0; i < meshGeometry.Indices.Count; i++)
{
var idx = meshGeometry.Indices[i];
meshData.Indices[i].VertexIndex = vertIndexer.IndexOf(idx.Vertex);
meshData.Indices[i].AverageNormalIndex = shaderData.AvgNormals.IndexOf(idx.AverageNormal);
int reIdx = shaderData.RoundEdgeData.IndexOf(idx.RoundEdgeData);
int reOffset = reIdx * 12 + ((int)Math.Floor(reIdx / 21d) * 4);
meshData.Indices[i].REShaderOffset = reOffset;
}
return(meshData);
}
private static MESH_FILE BuildMeshFile(MeshFile mesh)
{
if (!mesh.Cullings.Any(x => x.Type == MeshCullingType.MainModel))
{
if (Debugger.IsAttached)
{
throw new InvalidOperationException("Mesh does not contain culling information");
}
else
{
Debug.WriteLine("Mesh has no culling information!");
}
}
var file = new MESH_FILE
{
Header = MESH_HEADER.Create(mesh)
};
var avgNormals = mesh.GetAverageNormals().DistinctValues().ToList();
var outlines = mesh.GetRoundEdgeShaderData().EqualsDistinct().Select(x => x.Clone()).ToList();
for (int i = 20; i < outlines.Count; i += 21)
{
outlines[i].PackData();
}
var shaderData = new ShaderDataHelper(avgNormals, outlines);
file.AverageNormals = avgNormals.ToArray();
file.RoundEdgeShaderData = outlines.Select(x => new ROUNDEDGE_SHADER_DATA(x.Coords)).ToArray();
file.Geometry = SerializeMeshGeometry(file, shaderData, mesh.Geometry);
file.Cullings = new MESH_CULLING[mesh.Cullings.Count];
for (int i = 0; i < mesh.Cullings.Count; i++)
{
file.Cullings[i] = SerializeMeshCulling(file, shaderData, mesh.Cullings[i]);
}
return(file);
}
private static MESH_DATA ReadAlternateMesh(BinaryReaderEx br, MESH_FILE mesh, long boneMappingPosition, long meshDataSize)
{
long startPosition = br.Position;
int vertexCount = br.ReadInt32();
int indexCount = br.ReadInt32();
var geom = MESH_DATA.Create(vertexCount, indexCount, mesh.IsTextured, mesh.IsFlexible);
for (int i = 0; i < vertexCount; i++)
{
geom.Positions[i] = new Vector3(br.ReadSingles(3));
}
for (int i = 0; i < vertexCount; i++)
{
geom.Normals[i] = new Vector3(br.ReadSingles(3));
}
if (mesh.IsTextured)
{
for (int i = 0; i < vertexCount; i++)
{
geom.UVs[i] = new Vector2(br.ReadSingles(2));
}
}
for (int i = 0; i < indexCount; i++)
{
geom.Indices[i] = new MESH_INDEX()
{
VertexIndex = br.ReadInt32()
}
}
;
for (int i = 0; i < indexCount; i++)
{
geom.Indices[i].AverageNormalIndex = br.ReadInt32();
}
for (int i = 0; i < indexCount; i++)
{
geom.Indices[i].REShaderOffset = br.ReadInt32();
}
if (mesh.IsFlexible)
{
Trace.WriteLine("WARNING Flexible alternate mesh encountered!");
if (br.Position < startPosition + meshDataSize)
{
var dataOffsets = new List <int>();
for (int i = 0; i < vertexCount; i++)
{
dataOffsets.Add(br.ReadInt32());
}
long dataEndPosition = br.Position;
for (int i = 0; i < vertexCount; i++)
{
geom.Bones[i] = ReadBoneMapping(br, boneMappingPosition, dataOffsets[i]);
}
br.Position = dataEndPosition;
}
else
{
Trace.WriteLine("Flexible alternate mesh does not seem to be supported!");
geom.Bones = new MESH_BONE_MAPPING[0];
}
}
return(geom);
}
public static MESH_FILE ReadMeshFile(Stream stream)
{
stream.Position = 0;
var meshFile = new MESH_FILE();
using (var br = new BinaryReaderEx(stream, Encoding.UTF8, true))
{
var fileHeader = br.ReadStruct <MESH_HEADER>();
if (fileHeader.Header != "10GB")
{
throw new IOException("The file is not a LDD mesh file (*.g)");
}
meshFile.Header = fileHeader;
meshFile.Geometry = MESH_DATA.Create(fileHeader);
// Vertices & triangles
{
for (int i = 0; i < fileHeader.VertexCount; i++)
{
meshFile.Geometry.Positions[i] = new Vector3(br.ReadSingle(), br.ReadSingle(), br.ReadSingle());
}
for (int i = 0; i < fileHeader.VertexCount; i++)
{
meshFile.Geometry.Normals[i] = new Vector3(br.ReadSingle(), br.ReadSingle(), br.ReadSingle());
}
if (fileHeader.MeshType == (int)MeshType.StandardTextured || fileHeader.MeshType == (int)MeshType.FlexibleTextured)
{
for (int i = 0; i < fileHeader.VertexCount; i++)
{
meshFile.Geometry.UVs[i] = new Vector2(br.ReadSingle(), br.ReadSingle());
}
}
for (int i = 0; i < fileHeader.IndexCount; i++)
{
meshFile.Geometry.Indices[i] = new MESH_INDEX {
VertexIndex = br.ReadInt32()
}
}
;
}
// Edge shader data (brick outlines)
{
int shaderDataLength = br.ReadInt32();
int valueCounter = 0;
var shaderData = new List <ROUNDEDGE_SHADER_DATA>();
while (valueCounter < shaderDataLength)
{
bool endOfRow = 256 - ((valueCounter + 12) % 256) < 12;
int valueCount = endOfRow ? 16 : 12;
int remainingData = shaderDataLength - valueCounter;
if (valueCount > remainingData)
{
if (endOfRow && 12 <= remainingData)
{
valueCount = 12;
}
else
{
Trace.WriteLine("Shader data length error!!!");
stream.Skip(remainingData * 4);
break;
}
}
shaderData.Add(new ROUNDEDGE_SHADER_DATA(br.ReadSingles(valueCount)));
valueCounter += valueCount;
}
meshFile.RoundEdgeShaderData = shaderData.ToArray();
for (int i = 0; i < fileHeader.IndexCount; i++)
{
meshFile.Geometry.Indices[i].REShaderOffset = br.ReadInt32();
}
}
// Average Normals
{
int averageNormalsCount = br.ReadInt32();
//we skip the first item because it looks like an header and the maximum referenced value seems always one less the specified length
var dataHeader = new Vector3(br.ReadSingles(3));
if (dataHeader.X != 83 || dataHeader.Y != 0 || dataHeader.Z != 0)
{
Trace.WriteLine($"Unexpected average normal header: {dataHeader}");
}
meshFile.AverageNormals = new Vector3[averageNormalsCount - 1];
for (int i = 0; i < averageNormalsCount - 1; i++)
{
meshFile.AverageNormals[i] = new Vector3(br.ReadSingles(3));
}
for (int i = 0; i < fileHeader.IndexCount; i++)
{
meshFile.Geometry.Indices[i].AverageNormalIndex = br.ReadInt32();
}
}
long boneMappingPosition = 0;
// Flex data
if (fileHeader.MeshType == (int)MeshType.Flexible || fileHeader.MeshType == (int)MeshType.FlexibleTextured)
{
int dataSize = br.ReadInt32();
boneMappingPosition = stream.Position;
stream.Seek(dataSize, SeekOrigin.Current); //skip over the data
var dataOffsets = new List <int>();
for (int i = 0; i < fileHeader.VertexCount; i++)
{
dataOffsets.Add(br.ReadInt32());
}
long dataEndPosition = stream.Position;
for (int i = 0; i < fileHeader.VertexCount; i++)
{
meshFile.Geometry.Bones[i] = ReadBoneMapping(br, boneMappingPosition, dataOffsets[i]);
}
stream.Position = dataEndPosition;
}
int cullingInfoCount = br.ReadInt32();
int cullingInfoSize = br.ReadInt32();
meshFile.Cullings = new MESH_CULLING[cullingInfoCount];
for (int i = 0; i < cullingInfoCount; i++)
{
meshFile.Cullings[i] = ReadCullingInfo(br, meshFile, boneMappingPosition);
}
}
return(meshFile);
}
public static void WriteMeshFile(Stream stream, MESH_FILE meshFile)
{
using (var bw = new BinaryWriterEx(stream, Encoding.UTF8, true))
{
bw.WriteStruct(meshFile.Header);
void WriteVector3(Vector3 v)
{
bw.WriteSingle(v.X);
bw.WriteSingle(v.Y);
bw.WriteSingle(v.Z);
}
void WriteVector2(Vector2 v)
{
bw.WriteSingle(v.X);
bw.WriteSingle(v.Y);
}
foreach (var pos in meshFile.Geometry.Positions)
{
WriteVector3(pos);
}
foreach (var norm in meshFile.Geometry.Normals)
{
WriteVector3(norm);
}
if (meshFile.Geometry.UVs != null && meshFile.Geometry.UVs.Length > 0)
{
foreach (var uv in meshFile.Geometry.UVs)
{
WriteVector2(uv);
}
}
for (int i = 0; i < meshFile.Header.IndexCount; i++)
{
bw.WriteInt32(meshFile.Geometry.Indices[i].VertexIndex);
}
//Round Edge Shader Data
{
var allShaderData = meshFile.RoundEdgeShaderData.SelectMany(x => x.Coords).ToList();
bw.WriteInt32(allShaderData.Count * 2);
foreach (var shaderCoord in allShaderData)
{
WriteVector2(shaderCoord);
}
for (int i = 0; i < meshFile.Header.IndexCount; i++)
{
bw.WriteInt32(meshFile.Geometry.Indices[i].REShaderOffset);
}
}
//Average Normals
{
bw.WriteInt32(meshFile.AverageNormals.Length + 1);
WriteVector3(new Vector3(83, 0, 0));
foreach (var avgNorm in meshFile.AverageNormals)
{
WriteVector3(avgNorm);
}
for (int i = 0; i < meshFile.Header.IndexCount; i++)
{
bw.WriteInt32(meshFile.Geometry.Indices[i].AverageNormalIndex);
}
}
if (meshFile.Geometry.Bones != null && meshFile.Geometry.Bones.Length > 0)
{
//TODO: If flexible alternate meshes are supported, improve this code to include alternate meshes bones
// and a way to retrieve the correct offsets in WriteCullingInfo
var allBones = meshFile.Geometry.Bones.SelectMany(x => x.BoneWeights).ToList();
int boneDataSize = (allBones.Count * 8) + (meshFile.Header.VertexCount * 4);
bw.WriteInt32(boneDataSize);
var dataOffsets = new List <int>();
int totalOffset = 0;
for (int i = 0; i < meshFile.Header.VertexCount; i++)
{
var vertexBones = meshFile.Geometry.Bones[i];
bw.WriteInt32(vertexBones.BoneWeights.Length);
for (int j = 0; j < vertexBones.BoneWeights.Length; j++)
{
bw.WriteInt32(vertexBones.BoneWeights[j].BoneID);
bw.WriteSingle(vertexBones.BoneWeights[j].Weight);
}
//bone count (4 bytes) + bones data (id + weight = 8 bytes)
dataOffsets.Add(totalOffset);
totalOffset += 4 + (vertexBones.BoneWeights.Length * 8);
}
for (int i = 0; i < meshFile.Header.VertexCount; i++)
{
bw.WriteInt32(dataOffsets[i]);
}
}
//Mesh Culling Info
{
bw.WriteInt32(meshFile.Cullings.Length);
WriteSizedBlock(bw, () =>
{
for (int i = 0; i < meshFile.Cullings.Length; i++)
{
WriteCullingInfo(bw, meshFile.Cullings[i]);
}
}, false);
}
}
}
