/// <summary>
/// インデックスバッファを更新する
/// MEMO: 出力に対するushortを考慮することをやめればかなりシンプルに書ける
/// </summary>
private static void UpdateIndices(MeshGroup meshGroup, int vertexCount, int indexCount, Mesh resultMesh)
{
Profiler.BeginSample("MeshImporterDivided.UpdateIndices");
JobHandle jobHandle = default;
var disposables = new List <IDisposable>();
//
// https://www.khronos.org/registry/glTF/specs/2.0/glTF-2.0.html#_accessor_componenttype
//
if (vertexCount < ushort.MaxValue)
{
// vertex buffer への index が ushort に収まる
var indices = new NativeArray <ushort>(indexCount, Allocator.TempJob);
disposables.Add(indices);
var indexOffset = 0;
var vertexOffset = 0;
foreach (var mesh in meshGroup.Meshes)
{
switch (mesh.IndexBuffer.ComponentType)
{
case AccessorValueType.BYTE:
case AccessorValueType.UNSIGNED_BYTE:
case AccessorValueType.FLOAT:
throw new NotImplementedException($"{mesh.IndexBuffer.ComponentType}");
case AccessorValueType.SHORT:
case AccessorValueType.UNSIGNED_SHORT:
{
// unsigned short -> unsigned short
var source = mesh.IndexBuffer.Bytes.Reinterpret <ushort>(1);
jobHandle = new CopyIndicesJobs.Ushort2Ushort(
(ushort)vertexOffset,
new NativeSlice <ushort>(source),
new NativeSlice <ushort>(indices, indexOffset, mesh.IndexBuffer.Count))
.Schedule(mesh.IndexBuffer.Count, 1, jobHandle);
break;
}
case AccessorValueType.UNSIGNED_INT:
{
// unsigned int -> unsigned short
var source = mesh.IndexBuffer.Bytes.Reinterpret <uint>(1);
jobHandle = new CopyIndicesJobs.Uint2Ushort(
(ushort)vertexOffset,
source,
new NativeSlice <ushort>(indices, indexOffset, mesh.IndexBuffer.Count))
.Schedule(mesh.IndexBuffer.Count, 1, jobHandle);
break;
}
default:
throw new ArgumentException($"unknown index buffer type: {mesh.IndexBuffer.ComponentType}");
}
vertexOffset += mesh.VertexBuffer.Count;
indexOffset += mesh.IndexBuffer.Count;
}
jobHandle.Complete();
resultMesh.SetIndexBufferParams(indexCount, IndexFormat.UInt16);
resultMesh.SetIndexBufferData(indices, 0, 0, indexCount);
}
else
{
// vertex buffer への index が ushort を超える
var indices = new NativeArray <uint>(indexCount, Allocator.TempJob);
disposables.Add(indices);
var indexOffset = 0;
var vertexOffset = 0;
foreach (var mesh in meshGroup.Meshes)
{
switch (mesh.IndexBuffer.ComponentType)
{
case AccessorValueType.BYTE:
case AccessorValueType.UNSIGNED_BYTE:
case AccessorValueType.FLOAT:
throw new NotImplementedException($"{mesh.IndexBuffer.ComponentType}");
case AccessorValueType.SHORT:
case AccessorValueType.UNSIGNED_SHORT:
{
// unsigned short -> unsigned int
var source = mesh.IndexBuffer.Bytes.Reinterpret <ushort>(1);
jobHandle = new CopyIndicesJobs.Ushort2Uint(
(uint)vertexOffset,
source,
new NativeSlice <uint>(indices, indexOffset, mesh.IndexBuffer.Count))
.Schedule(mesh.IndexBuffer.Count, 1, jobHandle);
break;
}
case AccessorValueType.UNSIGNED_INT:
{
// unsigned int -> unsigned int
var source = mesh.IndexBuffer.Bytes.Reinterpret <uint>(1);
jobHandle = new CopyIndicesJobs.UInt2UInt(
(uint)vertexOffset,
source,
new NativeSlice <uint>(indices, indexOffset, mesh.IndexBuffer.Count))
.Schedule(mesh.IndexBuffer.Count, 1, jobHandle);
break;
}
default:
throw new ArgumentException($"unknown index buffer type: {mesh.IndexBuffer.ComponentType}");
}
vertexOffset += mesh.VertexBuffer.Count;
indexOffset += mesh.IndexBuffer.Count;
}
jobHandle.Complete();
resultMesh.SetIndexBufferParams(indexCount, IndexFormat.UInt32);
resultMesh.SetIndexBufferData(indices, 0, 0, indexCount);
}
foreach (var disposable in disposables)
{
disposable.Dispose();
}
Profiler.EndSample();
}
/// <summary>
/// インデックスバッファを更新する
/// MEMO: 出力に対するushortを考慮することをやめればかなりシンプルに書ける
/// </summary>
private static void UpdateIndices(MeshGroup meshGroup, int vertexCount, int indexCount, Mesh resultMesh)
{
Profiler.BeginSample("MeshImporterDivided.UpdateIndices");
JobHandle jobHandle = default;
var disposables = new List <IDisposable>();
// 出力をushortにするべきかどうかを判別
if (vertexCount < ushort.MaxValue)
{
var indices = new NativeArray <ushort>(indexCount, Allocator.TempJob);
disposables.Add(indices);
var indexOffset = 0;
var vertexOffset = 0;
foreach (var mesh in meshGroup.Meshes)
{
switch (mesh.IndexBuffer.ComponentType)
{
case AccessorValueType.SHORT:
{
// unsigned short -> unsigned short
var source = mesh.IndexBuffer.AsNativeArray <ushort>(Allocator.TempJob);
disposables.Add(source);
jobHandle = new CopyIndicesJobs.Ushort2Ushort(
(ushort)vertexOffset,
new NativeSlice <ushort>(source),
new NativeSlice <ushort>(indices, indexOffset, mesh.IndexBuffer.Count))
.Schedule(mesh.IndexBuffer.Count, 1, jobHandle);
break;
}
case AccessorValueType.UNSIGNED_INT:
{
// unsigned int -> unsigned short
var source = mesh.IndexBuffer.AsNativeArray <uint>(Allocator.TempJob);
disposables.Add(source);
jobHandle = new CopyIndicesJobs.Uint2Ushort(
(ushort)vertexOffset,
source,
new NativeSlice <ushort>(indices, indexOffset, mesh.IndexBuffer.Count))
.Schedule(mesh.IndexBuffer.Count, 1, jobHandle);
break;
}
default:
throw new ArgumentOutOfRangeException();
}
vertexOffset += mesh.VertexBuffer.Count;
indexOffset += mesh.IndexBuffer.Count;
}
jobHandle.Complete();
resultMesh.SetIndexBufferParams(indexCount, IndexFormat.UInt16);
resultMesh.SetIndexBufferData(indices, 0, 0, indexCount);
}
else
{
var indices = new NativeArray <uint>(indexCount, Allocator.TempJob);
disposables.Add(indices);
var indexOffset = 0;
var vertexOffset = 0;
foreach (var mesh in meshGroup.Meshes)
{
switch (mesh.IndexBuffer.ComponentType)
{
case AccessorValueType.SHORT:
{
// unsigned short -> unsigned int
var source = mesh.IndexBuffer.AsNativeArray <ushort>(Allocator.TempJob);
disposables.Add(source);
jobHandle = new CopyIndicesJobs.Ushort2Uint(
(uint)vertexOffset,
source,
new NativeSlice <uint>(indices, indexOffset, mesh.IndexBuffer.Count))
.Schedule(mesh.IndexBuffer.Count, 1, jobHandle);
break;
}
case AccessorValueType.UNSIGNED_INT:
{
// unsigned int -> unsigned int
var source = mesh.IndexBuffer.AsNativeArray <uint>(Allocator.TempJob);
disposables.Add(source);
jobHandle = new CopyIndicesJobs.UInt2UInt(
(uint)vertexOffset,
source,
new NativeSlice <uint>(indices, indexOffset, mesh.IndexBuffer.Count))
.Schedule(mesh.IndexBuffer.Count, 1, jobHandle);
break;
}
default:
throw new ArgumentOutOfRangeException();
}
vertexOffset += mesh.VertexBuffer.Count;
indexOffset += mesh.IndexBuffer.Count;
}
jobHandle.Complete();
resultMesh.SetIndexBufferParams(indexCount, IndexFormat.UInt32);
resultMesh.SetIndexBufferData(indices, 0, 0, indexCount);
}
foreach (var disposable in disposables)
{
disposable.Dispose();
}
Profiler.EndSample();
}