Examples of com.ardor3d.math.Quaternion.invert()

com.ardor3d.math.Quaternion.invert()
Calculates the multiplicative inverse Q^-1 of this quaternion Q such that QQ^-1 = [0,0,0,1] (the identity quaternion). Note that for unit quaternions, a quaternion's inverse is equal to its (far easier to calculate) conjugate. @param store the Quaternion to store the result in. If null, a new one is created. @see #conjugate(Quaternion) @return the multiplicative inverse of this quaternion.

            // build a Quaternion from camera axes to move
            final Quaternion q = Quaternion.fetchTempInstance();
            q.fromAxes(shadowCam.getLeft(), shadowCam.getUp(), shadowCam.getDirection());


            // invert to calculate in light space
            final Vector3 lightSpace = q.invert(null).apply(tmpVec, Vector3.fetchTempInstance());


            // snap to nearest texel
            lightSpace.setX(lightSpace.getX() - (lightSpace.getX() % texelSizeW));
            lightSpace.setY(lightSpace.getY() - (lightSpace.getY() % texelSizeH));

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