please format code with </> button * homework policy * asking questions
This is the processing code that I’d like to convert
Particle[] particles;
float alpha;
void setup() {
size(1112, 834);
background(0);
noStroke();
setParticles();
}
void draw() {
frameRate(30);
alpha = map(mouseX, 0, width, 5, 35);
fill(0, alpha);
rect(0, 0, width, height);
loadPixels();
for (Particle p : particles) {
p.move();
}
updatePixels();
}
void setParticles() {
particles = new Particle[10000];
for (int i = 0; i < 10000; i++) {
float x = random(width);
float y = random(height);
float adj = map(y, 0, height, 255, 0);
int c = color(60, adj, 255);
particles[i]= new Particle(x, y, c);
}
}
void mousePressed() {
setParticles();
}
class Particle {
float posX, posY, incr, theta;
color c;
Particle(float xIn, float yIn, color cIn) {
posX = xIn;
posY = yIn;
c = cIn;
}
public void move() {
update();
wrap();
display();
}
void update() {
incr += .008;
theta = noise(posX * .006, posY * .008, incr) * TWO_PI;
posX += 2 * tan(theta);
posY += 2 * sin(theta);
}
void display() {
if (posX > 0 && posX < width && posY > 0 && posY < height) {
pixels[(int)posX + (int)posY * width] = c;
}
}
void wrap() {
if (posX < 0) posX = width;
if (posX > width ) posX = 0;
if (posY < 0 ) posY = height;
if (posY > height) posY = 0;
}
}
-----
And this is how I changed and doesn't work
let particles;
var alpha;
let particle = [];
const num = 100;
function setup() {
initializeFields();
createCanvas(900, 500);
background(0);
noStroke();
setParticles();
}
function draw() {
frameRate(30);
alpha = map(mouseX, 0, width, 5, 35);
fill(0, alpha);
rect(0, 0, width, height);
loadPixels();
for (var p : particles) {
p.move();
}
updatePixels();
}
function setParticles() {
particles = new Array(10000);
for (var i = 0; i < 10000; i++) {
var x = random(width);
var y = random(height);
var adj = map(y, 0, height, 255, 0);
var c = color(60, adj, 255);
particles[i] = new Particle(x, y, c);
}
}
function mousePressed() {
setParticles();
}
class Particle {
constructor() {
this.posX = xIn;
this.posY = yIn;
this.c = cIn;
}
function move() {
update();
wrap();
display();
}
function update() {
incr += .008;
theta = noise(posX * .006, posY * .008, incr) * TWO_PI;
posX += 2 * tan(theta);
posY += 2 * sin(theta);
}
function display() {
if (posX > 0 && posX < width && posY > 0 && posY < height) {
pixels[int(posX) + int(posY) * width] = c;
}
}
function wrap() {
if (posX < 0)
posX = width;
if (posX > width)
posX = 0;
if (posY < 0)
posY = height;
if (posY > height)
posY = 0;
}
function initializeFields() {
particles = null;
alpha = 0;
posX = 0;
posY = 0;
incr = 0;
theta = 0;
c = null;
}
Could anyone help to convert and explain why the code I converted doesn’t work?Preformatted text