java-2d

We are currently developing a game in Java using the Java2D API and are experiencing some strange performance issues when running it in an Ubuntu environment. Our frame rate drops from an average of 62fps on Windows and Mac systems to about 10fps on Ubuntu. After some hours of debugging and testing various JVM flags it seems to be that BufferedImages using a bitmask are not being accelerated under Ubuntu because System.out.println(img.getCapabilities(config).isAccelerated()); prints out false. Currently we are loading our images via img = ImageIO.read(url); and are then creating a device

I'm trying to draw a polygon with a stroke of 1 pixel. Because the entire polygon is scaled by 100, I set the line width to 0.01. For some reason though, the polygon gets drawn with an on-screen line width of what looks to be 100 pixels instead of 1. I'm using GeneralPath as the polygon shape. Thin lines do get drawn if I use the same approach for drawing Line2D shapes. g2d.scale(100, 100); g2d.setStroke(new BasicStroke(0.01f)); g2d.draw(theShape); New info: If I remove the setStroke line I correctly get a 2 pixel line, since a BasicStroke of 0.02f was set on the Graphics2D object earlier.

I'm not good in math. I have 2 points, A(x1, y1) and B(x2, y2) in 2D. I need to create a virtual path from point A to B curved at R(radius), and then return an array of points which are describing this curved path, not all maybe every D(distance) from each other. In Java I need a method like this: private ArrayList<PointF> generateCurve(PointF pFrom,PointF pTo,float pRadius,float pMinDistance){ ArrayList<PointF> pOutPut = new ArrayList<PointF>(); // ...generate result to pOutPut return pOutPut; } How to do this ? Martijn Courteaux I didn't gave up and I've been working on it for a few more

I want to load large images (18000 x 18000) to my application. If i use BufferedImage with type int_rgb , I need around 1235mb of heap memory to load. This is a very high amount of memory, and end users will likely have less ram (1GB or less). On my development PC, when I load the image from MyEclipse IDE, it throws an out of memory Exception . When i pack my code to an executable jar and run it on my PC external of Eclipse, it still throws an exception. How do I load such a large image into my application using buffered image without using 1235mb of memory? Is there a trick, like splitting

Am I correct that Oracle has deprecated Swing and that JavaFx 2.0 is it's official replacement? This makes sense to me because it would seem kind of goofy for oracle to maintain the development of two competing api's that do pretty much the same thing. Yet Oracle has introduced enhancements like translucent windows, shaped windows, etc into the java 7 swing api. I take it this may be for transitional purposes but still I'd really appreciate it if someone could clue me on what the current 'standard' or 'best practice' choice is for new applications - Swing or javafx 2.0? Another source of

I am trying to draw lines using JPanel and I have hit somewhat of a wall. I can get two sides down but once it comes to subtracting from the x cord it all goes wrong. package GUIstuff; import java.awt.Graphics; import javax.swing.JPanel; public class DrawPanel extends JPanel{ public void paintComponent (Graphics g){ super.paintComponent(g); int width = getWidth(); int height = getHeight(); int drawCounter = 0; // counters for all the while statements int drawCounter2 = 0; int drawCounter3 = 0; int drawCounter4 = 0; int x1 = 0; // cords change with the while statemetns int x2 = 0; int y1 = 0;