Almost done with program, just a little help please
I am almost done with a program but I just need to have the planet which is _ball be painted on the screen. I am making a planet that orbits a sun, it all works but the planet is not painted on the screen, but I used a fill method. Can you guys help?
publicclass MovingBallextends SmartEllipse
{
int X0 = 100, Y0 = 100;
double X2, Y2;
double r = 10;
double a = 0;
double da = .04;
double ecc = 1;
double TWOPI = 2 * Math.PI;
private javax.swing.JPanel _panel;
public MovingBall (java.awt.Color aColor, javax.swing.JPanel aPanel)
{
super(aColor);
_panel = aPanel;
X2 = X0 + r * Math.cos(a);
Y2 = Y0 + r * Math.sin(a);
this.setLocation(X2, Y2);
}
publicvoid move()
{
a = a + da;
a = a % TWOPI;
X2 = X0 + r * ecc * Math.sin(a);
Y2 = Y0 + r * ecc * Math.sin(a);
this.setLocation (X2, Y2);
}
publicboolean inFront()
{
return (a <= Math.PI);
}
publicvoid SetCircle(int x,int y)
{
X0 = x;
Y0 = y;
//ecc = 1.0 - (double)pct/100;
}
publicvoid setAngleIncrement(double inc)
{
da = inc;
}
publicvoid setCenter(double g,double s)
{}
}
publicclass MovingBallPanelextends javax.swing.JPanelimplements Mover, Controller
{
privatefinalint INIT_X = 250;
privatefinalint INIT_Y = 200;
private SmartEllipse _sun;
private Sky _sky;
privatefinalint SUN_DIAMETER = 60;
private MovingBall _ball;
privatefinalint PLANET_DIAMETER = 35;
privatefinalint ORBIT_DIAMETER = 185;
int _da = 1;
int _ecc = 1;
privatefinalint INTERVAL = 100;
private MoveTimer _timer;
public MovingBallPanel()
{
super();
this.setBackground(java.awt.Color.BLACK);
_sun =new SmartEllipse(java.awt.Color.YELLOW);
_sun.setSize(SUN_DIAMETER, SUN_DIAMETER);
_sun.setLocation(INIT_X - SUN_DIAMETER/2, INIT_Y - SUN_DIAMETER/2);
_sky =new Sky();
_ball =new MovingBall(java.awt.Color.RED,this);
_ball.setCenter((INIT_X - PLANET_DIAMETER)/2, (INIT_Y - PLANET_DIAMETER)/2);
_ball.setAngleIncrement(_da);
_timer =new MoveTimer(INTERVAL,this);
_timer.start();
}
publicvoid move()
{
_ball.move();
this.repaint();
}
publicvoid go (boolean g)
{
if (g) _ball.setAngleIncrement(_da);
else _ball.setAngleIncrement(0);
}
publicvoid setSpeed(int degrees)
{
_da = 2 * degrees;
_ball.setAngleIncrement(_da);
}
publicvoid setEccentricity(int pct)
{
_ecc = pct;
//_ball.setEccentricity(_ecc);
}
publicvoid paintComponent(java.awt.Graphics aBrush)
{
super.paintComponent (aBrush);
java.awt.Graphics2D betterBrush = (java.awt.Graphics2D) aBrush;
_sky.paintSky(betterBrush);
_sun.draw(betterBrush);
_sun.fill(betterBrush);
_ball.draw(betterBrush);
_ball.fill(betterBrush);
}
}
publicclass PlanetAppextends javax.swing.JFrame
{
ControlPanel _controlPanel;
MovingBallPanel _movingBallPanel;
public PlanetApp (String title)
{
super(title);
this.setSize(600,500);
this.setBackground(java.awt.Color.BLACK);
this.setDefaultCloseOperation(javax.swing.JFrame.EXIT_ON_CLOSE);
_movingBallPanel =new MovingBallPanel();
_controlPanel =new ControlPanel(_movingBallPanel);
this.add(_movingBallPanel, java.awt.BorderLayout.CENTER);
this.add(_controlPanel, java.awt.BorderLayout.SOUTH);
this.setVisible(true);
}
publicstaticvoid main (String [] args)
{
PlanetApp app =new PlanetApp("Lab 5");
}
}
publicclass SmartEllipseextends java.awt.geom.Ellipse2D.Double{
private java.awt.Color _borderColor, _fillColor;// attributes
privateint _rotation;
privatefinalint STROKE_WIDTH = 2;
public SmartEllipse(java.awt.Color aColor){
_borderColor = aColor;
_fillColor = aColor;// solid color to start
_rotation = 0;// no rotation for now
}
// methods not provided by Java
publicvoid setBorderColor (java.awt.Color aColor){
_borderColor = aColor;
}
publicvoid setFillColor (java.awt.Color aColor){
_fillColor = aColor;
}
publicvoid setRotation (int aRotation){
_rotation = aRotation;
}
// more readable versions of methods provided by Java
publicvoid setLocation (double x,double y){
this.setFrame (x, y, this.getWidth(),
this.getHeight());
}
publicvoid setSize (int aWidth,int aHeight){
this.setFrame(this.getX(), this.getY(),
aWidth, aHeight);
}
publicvoid move (int aChangeInX,int aChangeInY){
this.setFrame((int)this.getX()+aChangeInX,
(int)this.getY()+aChangeInY,
this.getWidth(),
this.getHeight());
}
publicvoid fill (java.awt.Graphics2D aBetterBrush){
java.awt.Color savedColor = aBetterBrush.getColor();
aBetterBrush.setColor(_fillColor);
aBetterBrush.fill(this);// paint a solid ellipse
aBetterBrush.setColor(savedColor);
}
publicvoid draw (java.awt.Graphics2D aBrush){
java.awt.Color savedColor = aBrush.getColor();
aBrush.setColor(_borderColor);
java.awt.Stroke savedStroke = aBrush.getStroke();
aBrush.setStroke(new java.awt.BasicStroke(STROKE_WIDTH));
aBrush.draw(this);
aBrush.setStroke(savedStroke);
aBrush.setColor(savedColor);
}
}
