Function transformMat4Upper3x3

transformMat4Upper3x3(v, m, dst?): Vec3
Transform vec4 by upper 3x3 matrix inside 4x4 matrix.
Parameters
- v: Vec3
  The direction.
- m: Mat4
  The matrix.
- Optional dst: Vec3
  optional Vec3 to store result. If not passed a new one is created.
Returns Vec3
The transformed vector.