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Build indices for entire mesh

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This commit is contained in:
ackwell 2023-12-31 15:33:37 +11:00
parent f7a2c17415
commit 309f0351fa
1 changed files with 14 additions and 12 deletions
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26
Penumbra/Import/Models/MeshConverter.cs
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@ -40,7 +40,7 @@ public sealed class MeshConverter
var usages = _mdl.VertexDeclarations[_meshIndex].VertexElements var usages = _mdl.VertexDeclarations[_meshIndex].VertexElements
.Select(element => (MdlFile.VertexUsage)element.Usage) .Select(element => (MdlFile.VertexUsage)element.Usage)
.ToImmutableHashSet(); .ToImmutableHashSet();
_geometryType = GetGeometryType(usages); _geometryType = GetGeometryType(usages);
_skinningType = GetSkinningType(usages); _skinningType = GetSkinningType(usages);
} }
@ -58,7 +58,7 @@ public sealed class MeshConverter
if (!boneNameMap.TryGetValue(boneName, out var gltfBoneIndex)) if (!boneNameMap.TryGetValue(boneName, out var gltfBoneIndex))
// TODO: handle - i think this is a hard failure, it means that a bone name in the model doesn't exist in the armature. // TODO: handle - i think this is a hard failure, it means that a bone name in the model doesn't exist in the armature.
throw new Exception($"looking for {boneName} in {string.Join(", ", boneNameMap.Keys)}"); throw new Exception($"looking for {boneName} in {string.Join(", ", boneNameMap.Keys)}");
indexMap.Add(xivBoneIndex, gltfBoneIndex); indexMap.Add(xivBoneIndex, gltfBoneIndex);
} }
@ -67,6 +67,7 @@ public sealed class MeshConverter
private IMeshBuilder<MaterialBuilder>[] BuildMesh() private IMeshBuilder<MaterialBuilder>[] BuildMesh()
{ {
var indices = BuildIndices();
var vertices = BuildVertices(); var vertices = BuildVertices();
// TODO: handle submeshCount = 0 // TODO: handle submeshCount = 0
@ -74,13 +75,14 @@ public sealed class MeshConverter
return _mdl.SubMeshes return _mdl.SubMeshes
.Skip(Mesh.SubMeshIndex) .Skip(Mesh.SubMeshIndex)
.Take(Mesh.SubMeshCount) .Take(Mesh.SubMeshCount)
.Select(submesh => BuildSubMesh(submesh, vertices)) .Select(submesh => BuildSubMesh(submesh, indices, vertices))
.ToArray(); .ToArray();
} }
private IMeshBuilder<MaterialBuilder> BuildSubMesh(MdlStructs.SubmeshStruct submesh, IReadOnlyList<IVertexBuilder> vertices) private IMeshBuilder<MaterialBuilder> BuildSubMesh(MdlStructs.SubmeshStruct submesh, IReadOnlyList<ushort> indices, IReadOnlyList<IVertexBuilder> vertices)
{ {
var indices = BuildIndices(submesh); // Index indices are specified relative to the LOD's 0, but we're reading chunks for each mesh.
var startIndex = (int)(submesh.IndexOffset - Mesh.StartIndex);
var meshBuilderType = typeof(MeshBuilder<,,,>).MakeGenericType( var meshBuilderType = typeof(MeshBuilder<,,,>).MakeGenericType(
typeof(MaterialBuilder), typeof(MaterialBuilder),
@ -102,19 +104,19 @@ public sealed class MeshConverter
// TODO: split by submeshes // TODO: split by submeshes
for (var indexOffset = 0; indexOffset < submesh.IndexCount; indexOffset += 3) for (var indexOffset = 0; indexOffset < submesh.IndexCount; indexOffset += 3)
primitiveBuilder.AddTriangle( primitiveBuilder.AddTriangle(
vertices[indices[indexOffset + 0]], vertices[indices[indexOffset + startIndex + 0]],
vertices[indices[indexOffset + 1]], vertices[indices[indexOffset + startIndex + 1]],
vertices[indices[indexOffset + 2]] vertices[indices[indexOffset + startIndex + 2]]
); );
return meshBuilder; return meshBuilder;
} }
private IReadOnlyList<ushort> BuildIndices(MdlStructs.SubmeshStruct submesh) private IReadOnlyList<ushort> BuildIndices()
{ {
var reader = new BinaryReader(new MemoryStream(_mdl.RemainingData)); var reader = new BinaryReader(new MemoryStream(_mdl.RemainingData));
reader.Seek(_mdl.IndexOffset[_lod] + submesh.IndexOffset * sizeof(ushort)); reader.Seek(_mdl.IndexOffset[_lod] + Mesh.StartIndex * sizeof(ushort));
return reader.ReadStructuresAsArray<ushort>((int)submesh.IndexCount); return reader.ReadStructuresAsArray<ushort>((int)Mesh.IndexCount);
} }
private IReadOnlyList<IVertexBuilder> BuildVertices() private IReadOnlyList<IVertexBuilder> BuildVertices()
@ -244,7 +246,7 @@ public sealed class MeshConverter
// Some tangent W values that should be -1 are stored as 0. // Some tangent W values that should be -1 are stored as 0.
private Vector4 FixTangentVector(Vector4 tangent) private Vector4 FixTangentVector(Vector4 tangent)
=> tangent with { W = tangent.W == 1 ? 1 : -1 }; => tangent with { W = tangent.W == 1 ? 1 : -1 };
private Vector3 ToVector3(object data) private Vector3 ToVector3(object data)
=> data switch => data switch
{ {