public static void UpdateIndexBuffer(SharpDXInfo info, IEnumerable <int> rawIndices)
{
if (rawIndices == null)
{
return;
}
// 頂点数が既存のデータと違ってたらインデックスバッファを作り直す
if (rawIndices.Count() != info.rawIndices.Length)
{
if (!indexBufferPool.ContainsKey(rawIndices.Count()))
{
indexBufferPool[rawIndices.Count()] = CreateBuffer <int>(info.Device, BindFlags.IndexBuffer, rawIndices.Count());
}
Buffer buffer = indexBufferPool[rawIndices.Count()];
info.UpdateBuffers(indexBuffer: buffer);
var binding = new VertexBufferBinding(info.IndexBuffer, Utilities.SizeOf <int>(), 0);
info.Device.ImmediateContext.InputAssembler.SetIndexBuffer(buffer, Format.R32_UInt, 0);
info.rawIndices = rawIndices.ToArray();
}
// インデックスバッファの値を更新
var box = info.Device.ImmediateContext.MapSubresource(info.IndexBuffer, 0, MapMode.WriteDiscard, MapFlags.None);
for (int i = 0; i < rawIndices.Count(); i++)
{
System.Runtime.InteropServices.Marshal.StructureToPtr(rawIndices.ElementAt(i), box.DataPointer + Utilities.SizeOf <int>() * i, false);
info.rawIndices[i] = rawIndices.ElementAt(i);
}
info.Device.ImmediateContext.UnmapSubresource(info.IndexBuffer, 0);
}
