private VertexDeclaration(_VertexElement[] elements, _VertexElement extra)
{
_Elements = new _VertexElement[elements.Length + 1];
elements.CopyTo(_Elements, 0);
_Elements[_Elements.Length - 1] = extra;
_Stride = _Elements.Sum(item => item._Dimensions);
_HashCode = _Elements.Select(item => item.GetHashCode()).Aggregate((a, b) => (a * 17) ^ b);
_PositionV3 = GetOffset("POSITION");
_NormalV3 = GetOffset("NORMAL");
}
public VertexDeclaration WithVector4(string attribute)
{
var e = new _VertexElement(attribute, 4, Stride);
return(new VertexDeclaration(_Elements, e));
}
public VertexDeclaration()
{
_Elements = new _VertexElement[0];
}