@Override
    protected boolean checkCulling(Camera viewCam) {      
        Camera cam = viewCam;
        if(frustumCam != null){
            cam = frustumCam;            
            cam.setLocation(viewCam.getLocation());
            cam.setRotation(viewCam.getRotation());
        }
        TempVars vars = TempVars.get();
        boolean intersects = light.intersectsFrustum(cam,vars);
        vars.release();
        return intersects;
        
    }
@param viewCam the viewing Camera to check against
@return true if intersects, otherwise false
jme3-core/src/main/java/com/jme3/shadow/SpotLightShadowRenderer.java