private static D3D11PrimitiveTopology GetPrimitiveTopology(SdkMeshPrimitiveType primitiveType)
{
switch (primitiveType)
{
case SdkMeshPrimitiveType.TriangleList:
return(D3D11PrimitiveTopology.TriangleList);
case SdkMeshPrimitiveType.TriangleStrip:
return(D3D11PrimitiveTopology.TriangleStrip);
case SdkMeshPrimitiveType.LineList:
return(D3D11PrimitiveTopology.LineList);
case SdkMeshPrimitiveType.LineStrip:
return(D3D11PrimitiveTopology.LineStrip);
case SdkMeshPrimitiveType.PointList:
return(D3D11PrimitiveTopology.PointList);
case SdkMeshPrimitiveType.TriangleListAdj:
return(D3D11PrimitiveTopology.TriangleListAdj);
case SdkMeshPrimitiveType.TriangleStripAdj:
return(D3D11PrimitiveTopology.TriangleStripAdj);
case SdkMeshPrimitiveType.LineListAdj:
return(D3D11PrimitiveTopology.LineListAdj);
case SdkMeshPrimitiveType.LineStripAdj:
return(D3D11PrimitiveTopology.LineStripAdj);
case SdkMeshPrimitiveType.QuadPatchList:
return(D3D11PrimitiveTopology.TriangleList);
case SdkMeshPrimitiveType.TrianglePatchList:
return(D3D11PrimitiveTopology.TriangleList);
default:
return(D3D11PrimitiveTopology.TriangleList);
}
}
private void ComputeBoundingBox(SdkMeshRawFile rawFile, SdkMeshRawMesh rawMesh)
{
//this.BoundingBoxCenter = rawMesh.BoundingBoxCenter;
//this.BoundingBoxExtents = rawMesh.BoundingBoxExtents;
XMVector lower = XMVector.Replicate(float.MaxValue);
XMVector upper = XMVector.Replicate(float.MinValue);
int indsize;
if (rawFile.IndexBufferHeaders[rawMesh.IndexBuffer].IndexType == SdkMeshIndexType.IndexType32Bit)
{
indsize = 4;
}
else
{
indsize = 2;
}
for (int subset = 0; subset < rawMesh.NumSubsets; subset++)
{
SdkMeshRawSubset pSubset = rawFile.Subsets[rawMesh.SubsetsIndices[subset]];
SdkMeshPrimitiveType primType = pSubset.PrimitiveType;
Debug.Assert(primType == SdkMeshPrimitiveType.TriangleList, "Only triangle lists are handled.");
if (primType != SdkMeshPrimitiveType.TriangleList)
{
continue;
}
int indexCount = (int)pSubset.IndexCount;
int indexStart = (int)pSubset.IndexStart;
byte[] ind = rawFile.IndexBufferBytes[rawMesh.IndexBuffer];
byte[] verts = rawFile.VertexBufferBytes[rawMesh.VertexBuffers[0]];
int stride = (int)rawFile.VertexBufferHeaders[rawMesh.VertexBuffers[0]].StrideBytes;
for (int vertind = indexStart; vertind < indexStart + indexCount; vertind++)
{
int current_ind;
if (indsize == 2)
{
current_ind = BitConverter.ToInt16(ind, vertind * 2);
}
else
{
current_ind = BitConverter.ToInt32(ind, vertind * 4);
}
float x = BitConverter.ToSingle(verts, stride * current_ind);
float y = BitConverter.ToSingle(verts, stride * current_ind + 4);
float z = BitConverter.ToSingle(verts, stride * current_ind + 8);
lower = XMVector.Min(new XMVector(x, y, z, 1.0f), lower);
upper = XMVector.Max(new XMVector(x, y, z, 1.0f), upper);
}
}
XMVector half = upper - lower;
half *= 0.5f;
this.BoundingBoxCenter = lower + half;
this.BoundingBoxExtents = half;
}
