Problems with Java Update 1.6.0_29 (Mac OS X Lion)

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fh_wietma..

Problems with Java Update 1.6.0_29 (Mac OS X Lion)

in General Discussion • Other • 1 years ago

Hi there,

since I updated Java to 1.6.0_29 (Update 1 / Lion) I have problems displaying rotated objects. For instance, all circled objects like in the little code below are jittering ( – even when the object is smoothed):

float angle = 0;

void setup() {

size (800, 800);

}

void draw() {

background (0);

stroke(255);

translate(400, 400);

rotate(angle);

translate(-400, -400);

angle += 0.01;

arc(400, 400, 200, 200, 0, PI/1.1);

}

Does anybody have an idea what happened / what to do?

Thanks in advance and best,

Frank

Replies(5)

kritzikra..

Re: Problems with Java Update 1.6.0_29 (Mac OS X Lion)

1 years ago

yes, i have the same problem.

it appears to be an issue with the JAVA2D renderer,

no problem for me with P2D and OPENGL.

i've browsed through the release notes:

http://developer.apple.com/library/mac/#releasenotes/Java/JavaLionUpdate1SnowLeopardUpdate6RN/Introduction/Introduction.html#//apple_ref/doc/uid/TP40011337-CH1-SW1

doesn't look like they touched any graphics2d code at all,

wondering if this issue might have existed before then also...

only thing i found out:

the "inside" of the shapes is not the problem, but only the outline.

so the test case can be reduced to this:

float angle = 0;
void setup() {
size (800, 800, JAVA2D);
smooth();
}
void draw() {
background (0);
translate(400, 400);
rotate(angle);
angle += 0.01;
stroke(255);
noFill();
ellipse( 0, 0, 200, 200 );
}

i suppose it's some kind of rounding error,

it might really be tied to processing and not to the java update.

jeff_g

Re: Problems with Java Update 1.6.0_29 (Mac OS X Lion)

1 years ago

I've had some issues in OpenGL, where my animations, which took into account framerate, became jerky. I'm looking at converting to something based on time millis() to see if that will fix it, but thought I would mention it.

fh_wietma..

Re: Problems with Java Update 1.6.0_29 (Mac OS X Lion)

1 years ago

hi, thanks for all the comments!

yesterday, i tried the code on a computer running lion without the java update – and, believe it or not, everything was fine!? if possible, you should run the test on mac without using the newest java update and then, probably, you will see the difference.

finally, what happens then – if oracle did not make any changes on the renderer?

best, frank

kritzikra..

Re: Re: Problems with Java Update 1.6.0_29 (Mac OS X Lion)

1 years ago

pf... back to writing java code:

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.geom.Ellipse2D;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.Timer;
public class ChunkyMonkey{
public static void main(String[] args) {
JFrame frame = new JFrame( "Chunky Animation Test..." );
frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
frame.getContentPane().add( new ProblemChild(), BorderLayout.CENTER );
frame.pack();
frame.setVisible( true );
}
public static class ProblemChild extends JComponent{
float angle = 0;
Ellipse2D.Float ellipse;
public ProblemChild(){
setPreferredSize( new Dimension( 400, 400 ) );
ellipse = new Ellipse2D.Float( -100, -100, 200, 200 );
new Timer( 20 /*50fps*/, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
repaint();
}
} ).start();
}
@Override
protected void paintComponent( Graphics oldG ){
Graphics2D g = (Graphics2D) oldG;
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
angle += 0.01f;
g.translate( 200, 200 );
g.rotate( angle );
g.draw( ellipse );
}
}
}

so this confirms.... definitely a jre bug, not processing's fault, which is very very very very annoying.

mostly because i'm not even sure who's responsible for this now (oracle or apple)

and also no note of this change is in the release notes....

fh_wietma..

Re: Problems with Java Update 1.6.0_29 (Mac OS X Lion)

1 years ago

Hi Kritzikratzi,

thanks a lot for your comments - actually, that helps me to continue my project!

Best regards, Frank

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