internal VertexDeclaration(Resource.Models.VertexDeclaration declaration)
{
if (declaration.AlterateDecoder == 1)
{
throw new Exception("Don't know how to handle alterate decoder vertex declaration");
}
// Lets convert the RAGE VertexElement declarations to a more DirectX like one...
var rageElements = declaration.DecodeAsVertexElements();
var elements = new List<VertexElement>();
int streamIndex = rageElements[0].StreamIndex;
int offsetInStream = 0;
int[] typeMapping = {0, 15, 0, 16, 0, 1, 2, 3, 5, 4, 14, 0, 0, 0, 0, 0};
int[] usageMapping = {0, 9, 3, 7, 6, 5, 1, 2, 10, 0, 0, 0};
foreach (var rageEl in rageElements)
{
if (rageEl.StreamIndex != streamIndex)
{
streamIndex = rageEl.StreamIndex;
offsetInStream = 0;
}
var el = new VertexElement()
{
Stream = streamIndex,
Type = (VertexElementType) typeMapping[(int) rageEl.Type],
Usage = (VertexElementUsage) usageMapping[(int) rageEl.Usage],
Size = rageEl.Size,
Offset = offsetInStream,
Method = VertexElementMethod.Default,
UsageIndex = rageEl.UsageIndex,
};
offsetInStream += rageEl.Size;
elements.Add(el);
}
elements.Add(VertexElement.End);
Elements = elements.ToArray();
}