let num = 2; let ps = []; let sc = 30; class Particle { constructor(x, y, vx, vy, life, sz){ this.x = x; this.y = y; this.vx = vx; this.vy = vy; this.life = life; this.sz = sz; } // Add the power of points to attract each other gravitation() { for (let i= 0; i < ps.length; i++) { for (let j = 0; j random(1)) { if (vdist < r) { if (w > h) { if(this.pi.y > this.pj.y) { this.pi.vy -= random(a); } else if(this.pi.y < this.pj.y) { this.pi.vy += random(a); } if (this.pi.x > this.pj.x) { this.pi.vx -= random(b); } else if (this.pi.x < this.pj.x) { this.pi.vx += random(b); } } else { if(this.pi.y > this.pj.y) { this.pi.vy -= random(b); } else if(this.pi.y < this.pj.y) { this.pi.vy += random(b); } if (this.pi.x > this.pj.x) { this.pi.vx -= random(a); } else if (this.pi.x < this.pj.x) { this.pi.vx += random(a); } } } } } } } // Add random acceleration to points move() { for (let i=0; i < ps.length; i++) { this.pi = ps[i]; this.pi.x += this.pi.vx; this.pi.y += this.pi.vy; this.pi.life -= 0.02; let a = 0.3 * (1 - this.pi.life); let b = 0.3 * (1 - this.pi.life) * min(w,h) / max(w,h); if (w > h) { this.pi.vx += random(-b, b); this.pi.vy += random(-a, a); } else { this.pi.vx += random(-a, a); this.pi.vy += random(-b, b); } } } // Display the points display(){ for (let i=0; i < ps.length; i++) { this.pi = ps[i]; let x = map(this.pi.x, -sc, sc, 0, w); let y = map(this.pi.y, -sc, sc, 0, h); this.al = map(this.pi.life, 1, 0, 255, 0); fill(255, 0, 255, this.al); ellipse(x, y, this.pi.sz, this.pi.sz); } } // Display lines that connect points within a certain distance displayLine() { for (let i=0; i < ps.length; i++) { for (let j=0; j < ps.length; j++) { this.pi = ps[i]; this.pj = ps[j]; let x1 = map(this.pi.x, -sc, sc, 0, w); let y1 = map(this.pi.y, -sc, sc, 0, h); let x2 = map(this.pj.x, -sc, sc, 0, w); let y2 = map(this.pj.y, -sc, sc, 0, h); let distance = dist(this.pi.x, this.pi.y, this.pj.x, this.pj.y); if(distance < 7*(1 - this.pi.life)) { if(0.8>random(1)) { push(); this.col = map(distance, 0, 10, 255, 0); stroke(255 *1.5* this.pi.life, this.col, 255 - this.col, this.col); noFill(); line(x1, y1, x2, y2); pop(); } } } } } // Delete the points that have reached the end of their life delete() { 　for (i = ps.length - 1; i >= 0; i--) { 　this.pi = ps[i]; 　 if (this.pi.life <= 0) { 　 ps.splice(i,1); 　} 　} } } function setup() { createCanvas(w=windowWidth, h=windowHeight); for (i = 0; i < num; i++) { p = new Particle(random(-0.1, 0.1), random(-0.1, 0.1), 0, 0, 1, random(1, 5)); append(ps, p); } } function draw() { background(0); for (i = 0; i < num; i++) { p = new Particle(ps[i].x + cos(random(-PI, PI)), ps[i].y + sin(random(-PI, PI)), 0, 0, 1, random(1, 5)); append(ps, p); } p.gravitation(); p.move(); p.display(); p.displayLine(); p.delete(); } function mouseDragged() { for (i = 0; i < 2; i++) { let mx = map(mouseX, 0, w, -sc, sc); let my = map(mouseY, 0, h, -sc, sc); p = new Particle(mx + random(-0.1, 0.1), my + random(-0.1, 0.1), 0, 0, 1, random(1, 5)); append(ps, p); } } function mouseClicked() { for (i = 0; i < 20; i++) { let mx = map(mouseX, 0, w, -sc, sc); let my = map(mouseY, 0, h, -sc, sc); p = new Particle(mx + random(-1, 1), my + random(-1, 1), 0, 0, random(0.5, 1.5), random(1, 5)); append(ps, p); } }

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