/**
 * A class which is consulted by the FXStudio:
 * it helps advise *where* to draw things on the screen.
 * 
 * @author ITEC 120 class, in unison.
 * @version 2007.Aug.20
 */
class RocketScientist {

    /** Calculate The height of a UFO, at a given moment, for the opening
     *  scene -- taking off from the secret base.
     *
     * @param  frameNum  The frame number (0 is first frame; 24frames per second)
     * @return The y-coordinate for the ufo, at the desired frame. 
     */
    static int ufoHeightAt(int frameNum) {
        return 400 - 102 - frameNum -82;
    }

    
    /** Run some tests, to see if ufoHeight gives the expected answers.
     */
    static void testRocketScientist() {
        System.out.println( "Height of ufo at frame  0 is " + ufoHeightAt(0) );
        System.out.println( "Expected: 216" );
        System.out.println( "Height of ufo at frame  1 is " + ufoHeightAt(1) );
        System.out.println( "Expected: 215" );
        System.out.println( "Height of ufo at frame 73 is " + ufoHeightAt(73) );
        System.out.println( "Expected: 143" );
    }
}