public VertexElement(short stream, short offset, IAFormat format, IASemantic semantic, byte usageIndex)
{
Stream = stream;
Offset = offset;
Format = format;
Semantic = semantic;
UsageIndex = usageIndex;
}
public IndexedBufferView(IntPtr vertexPter, VertexDescriptor vd, IASemantic semantic, int usageIndex, IntPtr indicesPter, int istride, int icount)
{
this.vertexPter = (byte *)vertexPter + vd.OffsetOf(semantic, usageIndex);
this.vstride = vd.Size;
this.indicesPter = (byte *)indicesPter;
this.istride = istride;
this.icount = icount;
}
public VertexElementAttribute(IASemantic semantic, byte usageIndex = 0, short stream = 0, IAFormat type = IAFormat.Unused, short offset = -1)
{
this.Semantic = semantic;
this.UsageIndex = usageIndex;
this.Stream = stream;
this.Format = type;
this.Offset = offset;
}
public BufferView <T> GetVertexBufferView <T>(IASemantic usage, int index = 0) where T : struct
{
if (_vbStream == IntPtr.Zero)
{
_vbStream = _vb.Map(MapType.ReadWrite);
}
return(new BufferView <T>(_vbStream, _vd, usage, index, _vertexCount));
}
public BufferView GetVertexViewStream(IASemantic semantic, int index = 0)
{
if (_vbStream == null)
{
_vbStream = _vb.Map(MapType.ReadWrite);
}
return(new BufferView(_vbStream, _vd, semantic, index));
}
public int SizeOf(IASemantic semantic, int usageIndex)
{
for (int i = 0; i < elements.Length; i++)
{
if (elements[i].Semantic == semantic && elements[i].UsageIndex == usageIndex)
{
return(SizeOfElement(elements[i].Format));
}
}
return(-1);
}
public int OffsetOf(IASemantic semantic, int usageIndex)
{
for (int i = 0; i < elements.Length; i++)
{
if (elements[i].Semantic == semantic && elements[i].UsageIndex == usageIndex)
{
return(elements[i].Offset);
}
}
return(-1);
}
public IndexedBufferView <T> GetIndexedBufferView <T>(IASemantic semantic, int index = 0) where T : struct
{
if (_vbStream == IntPtr.Zero)
{
_vbStream = _vb.Map(MapType.ReadWrite);
}
if (_ibStream == IntPtr.Zero)
{
_ibStream = _ib.Map(MapType.ReadWrite);
}
return(new IndexedBufferView <T>(_vbStream, _vd, semantic, index, _ibStream, _ib.Stride, (int)_ib.SizeInBytes / _ib.Stride));
}
public IEnumerable <T> GetVertexAttrib <T>(int boneIndex, IASemantic usage, int index)
where T : struct
{
var attrib = _mesh.GetVertexBufferView <T>(usage, index);
var boneIndices = _mesh.GetVertexBufferView <float>(IASemantic.BlendIndices, 0);
for (int i = 0; i < attrib.Count; i++)
{
for (int j = 0; j < 4; j++)
{
if (boneIndices[i + j] == boneIndex)
{
yield return(attrib[i]);
}
}
}
}
public BufferView(IntPtr baseAddr, VertexDescriptor vd, IASemantic semantic, int usageIndex)
{
pter = baseAddr;
offset = vd.OffsetOf(semantic, usageIndex);
stride = vd.Size;
}
public bool HaveDeclarationUsage(IASemantic declarationUsage)
{
return(presentSemantics[(int)declarationUsage]);
}
