import java.awt.Graphics;
import static java.lang.Math.PI;
import static java.lang.Math.cos;
import static java.lang.Math.sin;

/**
 *
 * @author Peter Cappello
 */
class StarCritter extends Critter
{        
    private static final int RADIUS = EDGE_LENGTH / 2;
    private static int[] TRIANGLE_X =
    {
        (int) ( RADIUS * cos( PI / 2.0 ) ),
        (int) ( RADIUS * cos( 7.0 * PI / 6.0 ) ),
        (int) ( RADIUS * cos( 11.0 * PI / 6.0 ) )  
    };
    
    private static final int[] TRIANGLE_Y =
    {
        (int) ( RADIUS * sin( PI / 2.0 ) ),
        (int) ( RADIUS * sin( 7.0 * PI / 6.0 ) ),
        (int) ( RADIUS * sin( 11.0 * PI / 6.0 ) )
    };
            
    private static final int[] TRIANGLE2_Y =
    {
        (int) ( -RADIUS * sin( PI / 2.0 ) ),
        (int) ( -RADIUS * sin( 7.0 * PI / 6.0 ) ),
        (int) ( -RADIUS * sin( 11.0 * PI / 6.0 ) )
    };
        private int[] xArray;
        private int[] yArray;
        private int[] zArray;
        
    @Override
    public void move()
    {
        super.move();
        xArray = new int[] { x, x, x };
        yArray = new int[] { y, y, y };
        zArray = new int[] { y, y, y };
        for ( int i = 0; i < TRIANGLE_X.length; i++ )
        {
            xArray[ i ] += TRIANGLE_X[ i ] + EDGE_LENGTH / 2;
            yArray[ i ] += TRIANGLE_Y[ i ] + EDGE_LENGTH / 2;
            zArray[ i ] += TRIANGLE2_Y[ i ] + EDGE_LENGTH / 2;
        }
    }

    @Override
    public void draw( Graphics graphics )
    {
        graphics.setColor( color );
        graphics.fillPolygon( xArray, yArray,  TRIANGLE_X.length );
        graphics.fillPolygon( xArray, zArray, TRIANGLE_X.length );
    }
}