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Smoke Processing Weekly Challenge 57
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| class Particle { | |
| PVector position, velocity, accel, shapeSize; | |
| int transparency, texture_id; | |
| float size_scale, rotation; | |
| ParticleSystem parent; | |
| Particle(PVector origin, ParticleSystem parent) { | |
| this(origin, parent, 0); | |
| } | |
| Particle(PVector origin, ParticleSystem parent, int texture_id) { | |
| position = origin.copy(); | |
| velocity = new PVector(); | |
| accel = new PVector(); | |
| shapeSize = new PVector(150, 150); | |
| rotation = random(0, 2*PI); | |
| size_scale = .01; | |
| transparency = 150; | |
| this.texture_id = texture_id; | |
| this.parent = parent; | |
| } | |
| void applyForce(PVector force) { | |
| // sudo-mass calc | |
| force.x = force.x / (10-(size_scale*10)); | |
| accel.add(force); | |
| } | |
| void update() { | |
| accel.limit(1.75); | |
| accel.sub(velocity); | |
| velocity.add(accel); | |
| position.add(velocity); | |
| accel.set(0, 0); | |
| size_scale = min(1, size_scale+random(.0001, .01)); | |
| rotation -= PI/random(200,230); | |
| if (transparency <= 0) | |
| ps.removeParticle(this); | |
| else if (frameCount % 2 == 0) | |
| transparency--; | |
| } | |
| void draw() { | |
| pushMatrix(); | |
| translate(position.x, position.y); | |
| rotate(rotation); | |
| tint(255, transparency); | |
| image(textures[texture_id], 0, 0, shapeSize.x*size_scale, shapeSize.y*size_scale); | |
| popMatrix(); | |
| } | |
| } |
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| class ParticleSystem { | |
| ArrayList<Particle> P; | |
| PriorityQueue<Particle> remove_queue; | |
| PVector origin; | |
| int particleCount = 0; | |
| int maxParticles = 75; | |
| float xoff = 0; | |
| boolean move; | |
| ParticleSystem(PVector origin) { | |
| this(origin,true); | |
| } | |
| ParticleSystem(PVector origin, boolean movement) { | |
| remove_queue = new PriorityQueue<Particle>(); | |
| this.origin = origin.copy(); | |
| P = new ArrayList<Particle>(); | |
| move = movement; | |
| } | |
| void addParticle() { | |
| if (particleCount <= maxParticles) { | |
| P.add(new Particle(origin,this)); | |
| particleCount++; | |
| } | |
| } | |
| void removeParticle(Particle p) { | |
| remove_queue.add(p); | |
| } | |
| void removeDead() { | |
| P.removeAll(remove_queue); | |
| particleCount -= remove_queue.size(); | |
| remove_queue.clear(); | |
| } | |
| void update() { | |
| for (Particle p : P) { | |
| if(move) | |
| p.applyForce(new PVector(random(-15,15), - random(15))); | |
| p.update(); | |
| } | |
| } | |
| void draw() { | |
| for (Particle p : P) p.draw(); | |
| } | |
| } |
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| import java.util.*; | |
| ParticleSystem ps; | |
| PImage[] textures; | |
| void setup() { | |
| size(960, 540); | |
| textures = new PImage[2]; | |
| textures[0] = loadImage("smoke.png"); | |
| textures[1] = loadImage("bg.jpg"); | |
| imageMode(CENTER); | |
| ps = new ParticleSystem(new PVector(124,184)); | |
| } | |
| void mousePressed(){ | |
| println(mouseX,mouseY); | |
| } | |
| void draw() { | |
| ps.removeDead(); | |
| ps.update(); | |
| if (frameCount%5==0) | |
| ps.addParticle(); | |
| tint(255,255); | |
| background(0); | |
| //image(textures[1],width/2,height/2,width,height); | |
| //fill(255); | |
| //text("Particle Count: "+ps.particleCount, 10, 10); | |
| ps.draw(); | |
| } |
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