Smoother Animation?

[Token]

Hey, i'm new to Java and i was just wondering if there was some sort of a offscreenonly mode. if not, then how do i make this animation smoother?

code:

// The "Bounce" class. import java.awt.*; import hsa.Console; public class Bounce {     static Console c;           // The output console     public static void main (String [] args)     {         c = new Console (25, 90);         int ballx, bally;         ballx = c.getWidth () / 2;         bally = c.getHeight () / 2;         int [] x = new int [11];         int [] y = new int [11];         int [] xdir = new int [11];         int [] ydir = new int [11];         for (int i = 1 ; i <= 10 ; i++)         {             x [i] = (int) Math.rint (Math.random () * c.getWidth ());             y [i] = (int) Math.rint (Math.random () * c.getHeight ());             xdir [i] = (int) Math.rint (Math.random () * 8);             ydir [i] = (int) Math.rint (Math.random () * 8);         }         while (1 == 1)         {             for (int i = 1 ; i <= 10 ; i++)             {                 //  c.setColor (Color.white);                 // c.fillOval (x [i] - 5, y [i] - 5, 10, 10);                 x [i] += xdir [i];                 y [i] += ydir [i];                 if (x [i] >= c.getWidth () - 5 && xdir [i] > 0 || x [i] <= 5 && xdir [i] < 0)                 {                     xdir [i] *= -1;                 }                 else if (y [i] >= c.getHeight () - 5 && ydir [i] > 0 || y [i] <= 0 + 5 && ydir [i] < 0)                 {                     ydir [i] *= -1;                 }                 else if (Jordanclass.dist (x [i], y [i], ballx, bally) < 55)                 {                     xdir [i] *= -1;                     ydir [i] *= -1;                 }                 if (i == 1)                 {                     c.clear ();                 }                 c.setColor (Color.black);                 c.fillOval (x [i] - 5, y [i] - 5, 10, 10);             }             c.fillOval (ballx - 50, bally - 50, 100, 100);             Jordanclass.delay (3);         }         // Place your program here.  'c' is the output console     } // main method     static public void drawball (int x, int y, int rad, Color color)     {         c.setColor (color);         c.fillOval (x - rad, y - rad, rad * 2, rad * 2);     }             static public void delay (int msec)         {             long enterMsec = System.currentTimeMillis ();             long checkMsec = System.currentTimeMillis ();             while ((checkMsec - enterMsec) < msec)             {                 checkMsec = System.currentTimeMillis ();             }         }         static public double dist (int x1, int y1, int x2, int y2)         {             return Math.sqrt ((Math.pow (dif (x1, x2), 2)) + (Math.pow (dif (y1, y2), 2)));         }         static public int dif (int x1, int x2)         {             return Math.max (x1 - x2, x2 - x1);         }         } // Bounce class

Thanks in advance!

[MysticVegeta]

Why do I get an error: "Jordan Class" is either a misplaced package name or a non-existent entity.

Anyways, you dont need a def method. since when you square it the negative difference will become positive but not vice versa.

[[Gandalf]]

You would get that effect using Double Buffering. Don't ask me how to actually do it though.

[rizzix]

This was brought up a couple of times.. Please refer to:
http://compsci.ca/v2/viewtopic.php?t=3740

[Token]

Okay, I got it figured out and completely forgot about this post, but it keeps freezing every once in a while, both on my home computer and school computer. my teacher said that its java's fault, but i think that if i were to change the screen mode somehow it would work better because i read some stuff on diferent screenmodes, does that make any sence at all? and if it does how would i go about doing that?

MysticVegeta: because I created my own class to store my commonly used methods so i wouldent have to recreate them or copy them over again.

heres my new code

code:

// The "Bounce" class. import java.awt.*; import java.applet.Applet; import hsa.Console; public class Bounce {     static Console c;           // The output console     public static void main (String [] args)     {         c = new Console (25, 90);         int ballx, bally;         ballx = c.getWidth () / 2;         bally = c.getHeight () / 2;         int [] x = new int [11];         int [] y = new int [11];         int [] xdir = new int [11];         int [] ydir = new int [11];         for (int i = 1 ; i <= 10 ; i++)         {             x [i] = (int) Math.rint (Math.random () * c.getWidth ());             y [i] = (int) Math.rint (Math.random () * c.getHeight ());             xdir [i] = (int) Math.rint (Math.random () * 8);             ydir [i] = (int) Math.rint (Math.random () * 8);         }         while (1 == 1)         {             for (int i = 1 ; i <= 10 ; i++)             {                 c.setColor (Color.white);                 c.fillOval (x [i] - 5, y [i] - 5, 10, 10);                 x [i] += xdir [i];                 y [i] += ydir [i];                 if (x [i] >= c.getWidth () - 5 && xdir [i] > 0 || x [i] <= 5 && xdir [i] < 0)                 {                     xdir [i] *= -1;                 }                 else if (y [i] >= c.getHeight () - 5 && ydir [i] > 0 || y [i] <= 0 + 5 && ydir [i] < 0)                 {                     ydir [i] *= -1;                 }                 else if (dist (x [i], y [i], ballx, bally) < 55)                 {                     xdir [i] *= -1;                     ydir [i] *= -1;                 }                 if (i == 1)                 {                     //c.clear ();                 }                 c.setColor (Color.black);                 c.fillOval (x [i] - 5, y [i] - 5, 10, 10);             }             c.fillOval (ballx - 50, bally - 50, 100, 100);             delay (10);         }         // Place your program here.  'c' is the output console     } // main method     /////////////////////////////////--Delay--/////////////////////////////////     static public void delay (int msec)     {         long enterMsec = System.currentTimeMillis ();         long checkMsec = System.currentTimeMillis ();         while ((checkMsec - enterMsec) < msec)         {             checkMsec = System.currentTimeMillis ();         }     }     /////////////////////////////////--DISTANCE--/////////////////////////////////     static public double dist (int x1, int y1, int x2, int y2)     {         return Math.sqrt ((Math.pow (dif (x1, x2), 2)) + (Math.pow (dif (y1, y2), 2)));     }     /////////////////////////////////--DIFERENCE--/////////////////////////////////     static public int dif (int x1, int x2)     {         return Math.max (x1 - x2, x2 - x1);     }     /////////////////////////////////--DRAWBALL--/////////////////////////////////     static public void drawball (int x, int y, int rad, Color color)     {         c.setColor (color);         c.fillOval (x - rad, y - rad, rad * 2, rad * 2);     }     /////////////////////////////////--RANDCOLOR--/////////////////////////////////     public static Color randColor ()     {         return new Color (                 (int) Math.rint (Math.random () * 255),                 (int) Math.rint (Math.random () * 255),                 (int) Math.rint (Math.random () * 255));     }     /////////////////////////////////--PAUSE--/////////////////////////////////     static public void pause ()     {         char dummy;         dummy = c.getChar ();     } } // Bounce class

[rizzix]

Instead of the delay method you got there, i suggest you use Thread.sleep().

It is a static method that has the same effect.

While loops like that usually lead to 100% CPU consumption. Basically your program freezes.

[rizzix]

java.net on smooth animation: http://today.java.net/pub/a/today/2006/02/23/smooth-moves-solutions.html

[evogre3n]

rizzix wrote:

Instead of the delay method you got there, i suggest you use Thread.sleep().

It is a static method that has the same effect.

While loops like that usually lead to 100% CPU consumption. Basically your program freezes.

Agreed with rizzix here, but I do find your method quite interesting.