gistfile1.txt

int maxParticles = 100; ArrayList <Particle> particles = new ArrayList <Particle> (); int drawMode = 0; color BACKGROUND_COLOR = color(255); color PGRAPHICS_COLOR = color(0); PGraphics pg; void setup() { size(1280, 720, P2D); smooth(16); pg = createGraphics(width, height, JAVA2D); pg.beginDraw(); pg.textSize(500); pg.textAlign(CENTER, CENTER); pg.fill(PGRAPHICS_COLOR); pg.text("TYPE", pg.width/2, pg.height/2); pg.endDraw(); background(BACKGROUND_COLOR); } void draw() { addRemoveParticles(); for (Particle p : particles) { p.update(); p.display(); } } void mousePressed() { drawMode = ++drawMode%4; background(BACKGROUND_COLOR); if (drawMode == 2) image(pg, 0, 0); particles.clear(); } void addRemoveParticles() { if (drawMode >= 1) { for (int i=particles.size()-1; i>=0; i--) { Particle p = particles.get(i); if (p.life <= 0) { particles.remove(i); } } } while (particles.size () < maxParticles) { particles.add(new Particle()); } } class Particle { PVector loc, vel; float radius = 10; float life = 1; float lifeRate = 0.01; Particle() { getPosition(); vel = PVector.random2D(); } void getPosition() { while (loc == null || !isInText(loc)) loc = new PVector(random(width), random(height)); } void update() { vel.rotate(random(-QUARTER_PI, QUARTER_PI)); loc.add(vel); switch(drawMode) { case 0: if (!isInText(loc)) getPosition(); break; case 1: case 2: life -= lifeRate; break; case 3: if (!isInText(loc)) getPosition(); life -= lifeRate; break; } } void display() { fill(255); stroke(0, 125); float r = radius; switch(drawMode) { case 0: break; case 1: case 2: case 3: r *= life; break; } ellipse(loc.x, loc.y, r, r); } boolean isInText(PVector v) { return pg.get(int(v.x), int(v.y)) == PGRAPHICS_COLOR; } }