Filling polygons on Mac OS X (MRJ 3.3)

Question

Hi,
I had this problem on the OS X and wanted to see if someone out there has seen this problem and has a workaround. The problem has to do with the com.apple.mrj.internal.awt.graphics.PenGraphics class, but I could not find ANYTHING on this either on the Apple site, on the web, or even in newsgroups. And unfortunately, Apple doesn't have a searchable bug database online like Sun does for Java.
Basically, the problem has to do with filling certain concave polygons. Imagine a polygon where a ray from the first vertex of the polygon to some other vertex will exit the bounds of the polygon. One example is a star. When calling fillPolygon() on this type of polygons, sometimes the "in-side" of the ray will be filled in. The "in-side" is defined as the side of the ray where the polygon lies. Though some areas in this "in" side is outside the bounds of the polygon they are filled.
This bug does not happen all the time, but when two cases that I've found it to happen is when the "pen" of the PenGraphics object (as indicated by the toString() method) is GLPen or CGJavaPixelsPen. In the one case that the polygon filled properly for me, the pen was CGPen.
I'm not sure if the above description is clear, but here's some sample code that shows this problem. I'm using Mac OS 10.2.2, MRJ 3.3 (JDK 1.3.1).
ANY comment is welcome. Thanks!
* This test class shows the incorrect result of filling certain concave
* polygons on OS X. Specifically, this deals with the graphics class
* com.apple.mrj.internal.awt.graphics.PenGraphics.
* When running this, you'll see that some area outside of the given polygon
* are filled. It seems like a line is drawn from the first vertex of the
* polygon to each of the other vertices, and the "in-side" of this line
* is filled, though there may be areas that lie outside the bounds of the
* polygon.
* This bug does not happen all the time, but when two cases that I've found
* it to happen is when the "pen" of the PenGraphics object (as indicated
* by the toString() method) is GLPen or CGJavaPixelsPen. In the one case
* that the polygon filled properly for me, the pen was CGPen.
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class TestComp extends JComponent
protected void paintComponent(Graphics g)
super.paintComponent(g);
if (location == null)
return;
g.translate((int) this.location.getX(), (int) this.location.getY());
// filling the polygon
g.setColor(Color.yellow);
g.fillPolygon(xs, ys, xs.length);
// drawing the outline. the polygon should be filled within
// the outline
g.setColor(Color.black);
g.drawPolygon(xs, ys, xs.length);
// this draws the vertices, with the index of each vertices
for (int i = 0; i < xs.length; i++)
g.setColor(Color.red);
g.fillOval(xs,ys,5,5);
g.setColor(Color.blue);
g.drawString(String.valueOf(i), xs, ys);
// print out the graphics object info
System.out.println(g.getClass() + " " + g);
public static void main(String[] args)
JFrame rootFrame = new JFrame();
rootFrame.getContentPane().add(new TestComp());
rootFrame.setSize(300, 300);
rootFrame.setVisible(true);
Point location = new Point(150, 100);
// the shape to draw
int[] xs = { 1 , 50 , 10, 50 , -50 , -10 , -50};
int[] ys = { 1 , 50 , 50, 100 , 100 , 50 , 50};

Answer 1

I don't see why you should use the terminal.
All your applications are supposed to be in /Applications/
If you can see them in the finder, you can drag the file or folder to the terminal window and the path will paste.
Check if you application was not made for Os 10.4 or Intel only
It happens that applications do not work on "older" macs anymore.
If you have no luck, you might want to try VLC (videolan), it's an nice video app that supports most common formats. (and it's FOSS)