Java Java Random Walk - Printable Version

Code
import org.lwjgl.LWJGLException;

import org.lwjgl.input.Keyboard;

import org.lwjgl.opengl.Display;

import org.lwjgl.opengl.DisplayMode;

import org.lwjgl.opengl.GL11;



import java.util.Random;



public class randomWalk {



    

    public static void main(String[] args) {

        randomWalk display = new randomWalk();

        

        display.start();

        

    }

    public void start() {

        try {

        Display.setDisplayMode(new DisplayMode(800,600));

        Display.create();

        Display.setTitle("");

        Keyboard.create();

        GL11.glMatrixMode(GL11.GL_PROJECTION);

        GL11.glLoadIdentity();

        GL11.glOrtho(0, 800, 0, 600, 1, -1);

        GL11.glMatrixMode(GL11.GL_MODELVIEW);

    } catch (LWJGLException e) {

        e.printStackTrace();

        System.exit(0);

    }

        

        int x = 400; int y = 300; int xd,yd;

        Random prng = new Random();

        float toMoveY=0;

        float toMoveX=0;

        Line[] lines = new Line[25000];

        

while (!Display.isCloseRequested()) {



        GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT);

        xd = prng.nextInt(9)-4;

        yd = prng.nextInt(9)-4;

        GL11.glTranslatef(-toMoveX, -toMoveY, 0);

        toMoveX = toMoveY = 0;

        

        lines[0] = new Line(x, y, (x+xd), (y+yd));

        for(int i=24999;i>0;i--) {

            lines[i] = lines[i-1];

        }

        for(Line l : lines) {

            if(l != null) {

                drawLine(l.x,l.y,l.x1,l.y1);

            }

        }

        

        x=x+xd;y=y+yd;

        

        Display.update();

        if(Keyboard.isKeyDown(Keyboard.KEY_UP)) {

            toMoveY=0.5f;

        }

        if(Keyboard.isKeyDown(Keyboard.KEY_DOWN)) {

            toMoveY=-0.5f;

        }

        if(Keyboard.isKeyDown(Keyboard.KEY_RIGHT)) {

            toMoveX=0.5f;

        }

        if(Keyboard.isKeyDown(Keyboard.KEY_LEFT)) {

            toMoveX=-0.5f;

        }

        if(Keyboard.isKeyDown(Keyboard.KEY_LSHIFT)) {

            toMoveX*=2;

            toMoveY*=2;

        }

        if(Keyboard.isKeyDown(Keyboard.KEY_LCONTROL)) {

            toMoveX*=0.5;

            toMoveY*=0.5;

        }

        

        Display.sync(960);

    }

    Keyboard.destroy();

    Display.destroy();

    }

 

    

    

    public static void drawLine(double x, double y, double x1, double y1){



        GL11.glBegin(GL11.GL_LINES);

        GL11.glVertex2d(x,y);

        GL11.glVertex2d(x1,y1);

        GL11.glEnd();

    }

    

    public static class Line {

        double x;

        double y;

        double x1;

        double y1;



        public Line(double x, double y, double x1, double y1) {

            this.x = x;

            this.y = y;

            this.x1 = x1;

            this.y1 = y1;

        }

    }

}