Examples of com.jme.math.Vector3f.negate()

com.jme.math.Vector3f.negate()

        Quaternion rotation = cell.getWorldTransform().getRotation(null);
        Vector3f lookVec = CellPlacementUtils.getLookDirection(rotation, null);


        // translate into a quaternion using lookAt
        Quaternion look = new Quaternion();
        look.lookAt(lookVec.negate(), Vector3f.UNIT_Y);


        // find the origin by translating the look vector
        Vector3f origin = lookVec.mult(distance);
        origin.addLocal(cell.getWorldTransform().getTranslation(null));
        return new CellTransform(look, origin);

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    public static Matrix4f computeViewPlatformTransform(Vector3f userPosition, Vector3f direction, Vector3f up) {        
        Matrix4f mat = new Matrix4f();
        Vector3f axisX = new Vector3f();
        Vector3f axisY = new Vector3f();
        Vector3f axisZ = new Vector3f(direction);
        axisZ.negate();
        axisZ.normalize();


        axisX.cross(up, axisZ);
        axisX.normalize();

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     */
    public static Quaternion getCellRotation(CellTransform viewTransform) {
        Quaternion viewRotation = viewTransform.getRotation(null);
        Vector3f lookAt = CellPlacementUtils.getLookDirection(viewRotation, null);
        Quaternion rotation = new Quaternion();
        rotation.lookAt(lookAt.negate(), new Vector3f(0, 1, 0));
        return rotation;
    }


    /**
     * Returns the distance away to play a Cell so that its horizontal bounds

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