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SoCoder -> Snippet Home -> AI and Movement |
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melmantheman
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Moving particles in javaHow to move particles in java. here is a class for it. just copy and paste |
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//Erik Decker import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.io.*; import javax.imageio.ImageIO; import java.util.*; /** * Used to make a particle effect with variating rates, gravity, and motions * Made by Erik Decker. Posted on socoder.net * Hope you like it! */ public class Particle { double[][] particles; private double rate; private double gravity; private double type; private double width; /** * Makes a new set of particles * @param p the number of particles * @param r the speed at which they move (l/r) * @param grav the speed at which they fall * @param t the type of particle. Determines which equation to use. 0 = normal 1 = snow, 2 = dust, 3 = ash * @param w the max x value of the particle */ public Particle(int p, int r, int grav, int t,int w) { particles = new double[p][3]; rate = r; gravity = grav; type = t; makeParticles(); } private void makeParticles() { Random r1 = new Random(); for(int x = 0;x< particles.length;x++) { particles[x][0] = r1.nextInt(500); particles[x][1] = r1.nextInt(500); particles[x][2] = r1.nextInt(500); } } private void newPart(int x) { Random r1 = new Random(); //particles[x][0] = r1.nextInt(500); particles[x][1] = r1.nextInt(500); particles[x][2] = particles[x][1];//offset } /** * moves Particles in designated direction */ public void moveParticles() { for(int x = 0; x < particles.length;x++) { if(type == 0) { particles[x][1] += gravity; } else if(type == 1) { particles[x][0] = ((20)*Math.sin(particles[x][1]))+particles[x][2]; //System.out.println(particles[x][1]); particles[x][1] += gravity; } else if(type == 2) { particles[x][0] += rate; particles[x][1] += gravity; } else if(type == 3) { particles[x][0] = ((20)*Math.sin(particles[x][1]))+particles[x][2]; particles[x][1] -= gravity; } //137 if(particles[x][1] > 500) { newPart(x); } } } /** * Returns all particle x's and y's * @return int[][] array of particle x's and y's */ public double[][] getParticles() { return particles; } /** * change the rate of the particles to r * @param r the new rate */ public void changeRate(int r) { rate = r; } } |
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