nature-of-code/0. Randomness/9. Perlin animated/sketch.js

31 lines
694 B
JavaScript

let increment = 0.01
let octaves = 8
let falloff = 0.4
let t = 0
let animationSpeed = 0.0005
function setup() {
createCanvas(640, 240)
pixelDensity(1)
noiseDetail(octaves, falloff)
}
function draw() {
loadPixels()
for (let x = 0; x < width; x++) {
for (let y = 0; y < height; y++) {
let index = (x + y * width) * 4
let noiseValue = noise(x*increment, y*increment, t*animationSpeed)
let bright = map(noiseValue, 0, 1, 0, 255)
pixels[index+0] = bright
pixels[index+1] = bright
pixels[index+2] = bright
pixels[index+3] = 255
}
}
updatePixels()
t += deltaTime
}