public static VertexBufferBinding[] ConvertVertexBufferBinding(SharpGLTF.Schema2.MeshPrimitive mesh, GraphicsDevice device)
{
var offset = 0;
var vertElem =
mesh.VertexAccessors
.Select(
x =>
{
var y = ConvertVertexElement(x, offset);
offset += y.Item2;
return(y.Item1);
})
.ToList();
var declaration =
new VertexDeclaration(
vertElem.ToArray()
);
var size = mesh.VertexAccessors.First().Value.Count;
var byteBuffer = Enumerable.Range(0, size)
.Select(
x =>
declaration.EnumerateWithOffsets()
.Select(y => y.VertexElement.SemanticName
.Replace("ORD", "ORD_" + y.VertexElement.SemanticIndex)
.Replace("BLENDINDICES", "JOINTS_0")
.Replace("BLENDWEIGHT", "WEIGHTS_0")
)
.Select(y => mesh.GetVertexAccessor(y).TryGetVertexBytes(x).ToArray())
)
.SelectMany(x => x)
.SelectMany(x => x)
.ToArray();
var buffer =
Stride.Graphics.Buffer.Vertex.New(
device,
new DataPointer(
GCHandle.Alloc(byteBuffer, GCHandleType.Pinned).AddrOfPinnedObject(),
byteBuffer.Length
)
);
var binding = new VertexBufferBinding(buffer, declaration, size);
return(new List <VertexBufferBinding>()
{
binding
}.ToArray());
}
public static InputElementDescription[] CreateInputElements(this VertexDeclaration vertexDeclaration)
{
var inputElements = new InputElementDescription[vertexDeclaration.VertexElements.Length];
var inputElementIndex = 0;
foreach (var element in vertexDeclaration.EnumerateWithOffsets())
{
inputElements[inputElementIndex++] = new InputElementDescription
{
SemanticName = element.VertexElement.SemanticName,
SemanticIndex = element.VertexElement.SemanticIndex,
Format = element.VertexElement.Format,
InputSlot = 0,
AlignedByteOffset = element.Offset,
};
}
return(inputElements);
}