/// <summary>
/// Applies a transform directly to position and normal channels. Node transforms are unaffected.
/// </summary>
internal void TransformContents(ref Matrix xform)
{
// Transform positions
var updateBuffer = new Vector3[positions.Count];
positions.CopyTo(updateBuffer, 0);
Vector3.Transform(updateBuffer, ref xform, updateBuffer);
positions.Clear();
foreach (var pos in updateBuffer)
{
positions.Add(pos);
}
foreach (var geom in geometry)
{
// Transform all vectors too
var geomBuffer = new Vector3[geom.Vertices.VertexCount];
foreach (var channel in geom.Vertices.Channels)
{
if (channel.Name.StartsWith("Normal") ||
channel.Name.StartsWith("Binormal") ||
channel.Name.StartsWith("Tangent"))
{
channel.Items.CopyTo(geomBuffer, 0);
Vector3.TransformNormal(geomBuffer, ref xform, geomBuffer);
channel.Items.Clear();
foreach (var item in geomBuffer)
{
channel.Items.Add(item);
}
}
}
}
}