Matrix4d.lookAlong

Apply a rotation transformation to this matrix to make <code>-z</code> point along <code>dir</code>. <p> If <code>M</code> is <code>this</code> matrix and <code>L</code> the lookalong rotation 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 lookalong rotation transformation will be applied first! <p> This is equivalent to calling {@link #lookAt(double, double, double, double, double, double, double, double, double) lookAt()} with <code>eye = (0, 0, 0)</code> and <code>center = dir</code>. <p> In order to set the matrix to a lookalong transformation without post-multiplying it, use {@link #setLookAlong(double, double, double, double, double, double) setLookAlong()}

@see #lookAt(double, double, double, double, double, double, double, double, double) @see #setLookAlong(double, double, double, double, double, double)

@param dirX the x-coordinate of the direction to look along @param dirY the y-coordinate of the direction to look along @param dirZ the z-coordinate of the direction to look along @param upX the x-coordinate of the up vector @param upY the y-coordinate of the up vector @param upZ the z-coordinate of the up vector @return this