Matrix4d.rotateTowards

Apply a model transformation to this matrix for a right-handed coordinate system, that aligns the local <code>+Z</code> axis with <code>direction</code>. <p> If <code>M</code> is <code>this</code> matrix and <code>L</code> the lookat matrix, then the new matrix will be <code>M * L</code>. So when transforming a vector <code>v</code> with the new matrix by using <code>M * L * v</code>, the lookat transformation will be applied first! <p> In order to set the matrix to a rotation transformation without post-multiplying it, use {@link #rotationTowards(ref Vector3d, Vector3d) rotationTowards()}. <p> This method is equivalent to calling: <code>mulAffine(new Matrix4d().lookAt(new Vector3d(), new Vector3d(dir).negate(), up).invertAffine())</code>

@see #rotateTowards(double, double, double, double, double, double) @see #rotationTowards(ref Vector3d, Vector3d)

@param direction the direction to orient towards @param up the up vector @return this