/// <summary>
/// Build a transformation matrix from rotation, scaling and translation components.
/// The transformation order is scaling, rotation, translation (left to right).
/// </summary>
/// <param name="presentRotation"></param>
/// <param name="presentScaling"></param>
/// <param name="presentPosition"></param>
/// <param name="outMatrix"></param>
private static void BuildTransform(ref Assimp.Quaternion presentRotation, ref Vector3D presentScaling,
ref Vector3D presentPosition, out Matrix4 outMatrix)
{
// build a transformation matrix from it
var mat = new Matrix4x4(presentRotation.GetMatrix());
mat.A1 *= presentScaling.X;
mat.B1 *= presentScaling.X;
mat.C1 *= presentScaling.X;
mat.A2 *= presentScaling.Y;
mat.B2 *= presentScaling.Y;
mat.C2 *= presentScaling.Y;
mat.A3 *= presentScaling.Z;
mat.B3 *= presentScaling.Z;
mat.C3 *= presentScaling.Z;
mat.A4 = presentPosition.X;
mat.B4 = presentPosition.Y;
mat.C4 = presentPosition.Z;
outMatrix = AssimpToOpenTk.FromMatrix(ref mat);
}