Polygons with float precision?

Question

Is it possible to use polygons with arrays of floats? I've looked up the source code and it seems that the code is all based around the use of ints.
How would I go about making a polygon use floats so that it can move smoothly around the screen? I've got it moving using ints, but this causes horrible jerky-like movement.
Thanks
Ribot.

Answer 1

g2d.drawOval(circleX, 400, 25, 25);
circleX++;That should move it by 1 pixel on the x axis each time through the loop, unless you have other code that is changing the value (perhaps you could add System.out.println("CircleX = " + circleX) statements before your drawOval statement...
in the same animation loop I feature the following
code which moves the graphics2D object by fractional
amounts across the screen (this is the effect I want
to get with a polygon based shape):It only moves on screen when the value of the integer part of the fraction changes (your monitor would be unable to move it by a fraction of a pixel). Why not use double values and cast them to ints if you want to replicate this?
>
circle.setFrame(550.5+(tickerTest*0.1), 300.5, 50,
60);
Area test = new Area(circle);
g2d.setColor(Color.magenta);
g2d.fill(test);
tickerTest++;
Is there a Graphics2D polygon type object? I've
looked in the API and haven't found anything. how about g2d.drawPolygon()
I have done this without double buffering and it works perfectly... a 20ms delay and there isn't any flicker (P3 600MHz, JDK 1.2.2), so I really don't understand unless you have some massive processing running concurrently... javax.swing.JFrame frame = new javax.swing.JFrame();
frame.setSize(200,200);
frame.show();
java.awt.Graphics2D g2d = (java.awt.Graphics2D)frame.getGraphics();
int x = 50;
int y = 50;
int dx = 1;
int dy = 2;
int width = 20;
int height = 20;
for(int i = 0; i < 1000; i++) {
     g2d.clearRect(0, 0, 200, 200);
     g2d.drawOval(x, y, width, height);
     x += dx;
     y += dy;
     if(x < 0 || x > 180) dx *= -1;
     if(y < 20 || y > 180) dy *= -1;
     Thread.sleep(20);