/// <summary>
/// Modifies a contribution using a transform, position, and weight.
/// </summary>
/// <param name="transform">Transform to use to modify the contribution.</param>
/// <param name="center">Center to use to modify the contribution.</param>
/// <param name="baseContribution">Original unmodified contribution.</param>
/// <param name="weight">Weight of the contribution.</param>
/// <param name="contribution">Transformed contribution.</param>
public static void TransformContribution(ref RigidTransform transform, ref Vector3 center, ref Matrix3x3 baseContribution, float weight, out Matrix3x3 contribution)
{
Matrix3x3 rotation;
Matrix3x3.CreateFromQuaternion(ref transform.Orientation, out rotation);
Matrix3x3 temp;
//Do angular transformed contribution first...
Matrix3x3.MultiplyTransposed(ref rotation, ref baseContribution, out temp);
Matrix3x3.Multiply(ref temp, ref rotation, out temp);
contribution = temp;
//Now add in the offset from the origin.
Vector3 offset;
Vector3.Subtract(ref transform.Position, ref center, out offset);
Matrix3x3 innerProduct;
Matrix3x3.CreateScale(offset.LengthSquared(), out innerProduct);
Matrix3x3 outerProduct;
Matrix3x3.CreateOuterProduct(ref offset, ref offset, out outerProduct);
Matrix3x3.Subtract(ref innerProduct, ref outerProduct, out temp);
Matrix3x3.Add(ref contribution, ref temp, out contribution);
Matrix3x3.Multiply(ref contribution, weight, out contribution);
}
