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improve particle physics

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Signed-off-by: Ari Archer <ari@ari.lt>
This commit is contained in:
Arija A. 2024-06-12 15:31:26 +03:00
parent becdfab1e3
commit 707f003772
1 changed files with 31 additions and 23 deletions
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54
src/static/js/particles.js
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@ -22,6 +22,21 @@
"use strict";
function debounce(func, wait, immediate) {
let timeout;
return function () {
let context = this,
args = arguments;
let later = function () {
timeout = null;
if (!immediate) func.apply(context, args);
};
let call_now = immediate && !timeout;
clearTimeout(timeout);
timeout = setTimeout(later, wait);
if (call_now) func.apply(context, args);
};
}
document.addEventListener("DOMContentLoaded", function () {
const canvas = document.createElement("canvas");
canvas.id = "particles";
@ -33,12 +48,15 @@ document.addEventListener("DOMContentLoaded", function () {
canvas.height = window.innerHeight;
let particles = [];
const particle_density = 2e-5;
const particle_density = 4e-5;
let num_particles;
const particle_size = 2;
const avoidance_radius = 64;
const connection_radius = 192;
const damping = 0.993;
const collision_damping = 0.8;
const drift_strength = 0.1;
let mouse = {
x: -1,
@ -57,22 +75,6 @@ document.addEventListener("DOMContentLoaded", function () {
}
}
function debounce(func, wait, immediate) {
let timeout;
return function () {
let context = this,
args = arguments;
let later = function () {
timeout = null;
if (!immediate) func.apply(context, args);
};
let call_now = immediate && !timeout;
clearTimeout(timeout);
timeout = setTimeout(later, wait);
if (call_now) func.apply(context, args);
};
}
window.addEventListener("mousemove", update_pointer);
window.addEventListener("touchmove", update_pointer);
@ -97,19 +99,22 @@ document.addEventListener("DOMContentLoaded", function () {
this.x = Math.random() * canvas.width;
this.y = Math.random() * canvas.height;
this.velocity = {
x: (Math.random() - 0.5) * 2,
y: (Math.random() - 0.5) * 2,
x: (Math.random() - 0.5) * 4,
y: (Math.random() - 0.5) * 4,
};
}
update() {
this.velocity.x += (Math.random() - 0.5) * drift_strength;
this.velocity.y += (Math.random() - 0.5) * drift_strength;
if (this.x <= 0 || this.x >= canvas.width) {
this.velocity.x *= -1;
this.velocity.x *= -collision_damping;
this.x = Math.max(Math.min(this.x, canvas.width), 0);
}
if (this.y <= 0 || this.y >= canvas.height) {
this.velocity.y *= -1;
this.velocity.y *= -collision_damping;
this.y = Math.max(Math.min(this.y, canvas.height), 0);
}
@ -118,10 +123,13 @@ document.addEventListener("DOMContentLoaded", function () {
let distance = Math.sqrt(dx * dx + dy * dy);
if (distance < avoidance_radius && distance > 0) {
this.velocity.x += (dx / distance) * 0.5;
this.velocity.y += (dy / distance) * 0.5;
this.velocity.x -= (dx / distance) * 0.5;
this.velocity.y -= (dy / distance) * 0.5;
}
this.velocity.x *= damping;
this.velocity.y *= damping;
this.x += this.velocity.x;
this.y += this.velocity.y;
}