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/*******************************************************************************
* Copyright (c) 2018 Remain Software
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* wim.jongman@remainsoftware.com - initial API and implementation
*******************************************************************************/
// Copyright 2017 Wim Jongman
function Particle() {
this.init = function(first) {
this.fTrail = new Array();
this.fChar = new Array();
this.fOpac = new Array();
this.scalar = 10;
this.fForce = createVector(0, this.scalar);
if (first) {
this.active = Math.floor(random(50));
}
this.alive = 0;
this.laneNumber = this.getFreeLane();
lanes[this.laneNumber] = true;
this.theY = 0;
if (first) {
this.theY = Math.floor(random(height / 2));
}
this.pos = createVector(this.laneNumber * this.scalar, this.theY);
this.vel = createVector(0, 0);
this.acc = createVector(0, 0);
this.prv = createVector(0, 0);
this.speed = Math.floor(random(10) + 1);
this.char = this.getRandomChar();
this.fTrail[this.fTrail.length] = this.pos;
this.fChar[this.fChar.length] = this.char;
this.fOpac[this.fOpac.length] = 255;
}
this.getRandomChar = function() {
if (Math.round(random()) == 1) {
return char(Math.floor(12458 + random(74)));
}
return char(Math.floor(47 + random(43)));
}
/**
* Become active after a while.
*/
this.isActive = function() {
if (this.active <= 0) {
return true;
}
this.active--;
return false;
}
this.getFreeLane = function() {
var numberOfLanes = Math.floor(width / this.scalar);
var result = Math.floor(random(numberOfLanes));
while (lanes[result] == true) {
result = Math.floor(random(numberOfLanes));
}
return result;
}
this.update = function() {
// console.log(this.alive, this.fTrail.length, this.pos.y);
if (this.pos.y > height
&& (this.alive > 0 && (this.alive + 5) >= this.fTrail.length)) {
lanes[this.laneNumber] = false;
this.init(false);
}
else if (this.pos.y <= height + 20) {
var copy = this.pos.copy();
this.fTrail[this.fTrail.length] = copy;
this.fChar[this.fChar.length] = this.char;
this.fOpac[this.fOpac.length] = 200;
this.vel.add(this.acc);
this.pos.add(this.vel);
this.vel.limit(this.speed);
this.acc.mult(0);
this.char = this.getRandomChar();
}
}
this.getOpacity = function(pos) {
var count = this.fOpac[pos];
this.fOpac[pos] -= this.speed;
if (this.fTrail[pos].y > height) {
this.fOpac[pos] = 0;// (this.speed * 100);
}
if (count > 0 && this.fOpac[pos] <= 0) {
this.alive += 2;
}
return this.fOpac[pos];
}
this.getX = function(pos) {
return this.fTrail[pos].x;
}
this.getY = function(pos) {
return this.fTrail[pos].y;
}
this.getChar = function(pos) {
if (Math.floor(random(10)) == 5) {
this.fChar[pos] = this.getRandomChar();
}
if (pos == 0) {
return this.getRandomChar();
}
return this.fChar[pos];
}
this.applyForce = function() {
this.acc.add(this.fForce);
}
this.init(true);
}
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