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improve dot effect

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Signed-off-by: Ari Archer <ari@ari.lt>
This commit is contained in:
Arija A. 2024-06-11 20:28:06 +03:00
parent cbffb16d33
commit 7eed157a33
1 changed files with 25 additions and 32 deletions
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57
src/static/js/particles.js
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@ -37,7 +37,8 @@ document.addEventListener("DOMContentLoaded", function () {
let num_particles;
const particle_size = 2;
const avoidance_radius = 48;
const avoidance_radius = 64;
const connection_radius = 192;
let mouse = {
x: null,
@ -100,7 +101,7 @@ document.addEventListener("DOMContentLoaded", function () {
};
}
update(particles) {
update() {
if (this.x <= 0 || this.x >= canvas.width) {
this.velocity.x *= -1;
this.x = Math.max(Math.min(this.x, canvas.width), 0);
@ -120,35 +121,6 @@ document.addEventListener("DOMContentLoaded", function () {
this.velocity.y += (dy / distance) * 0.5;
}
particles.forEach((p) => {
if (p !== this) {
let dx = p.x - this.x;
let dy = p.y - this.y;
let distance = Math.sqrt(dx * dx + dy * dy);
if (distance < 2 * particle_size && distance > 0) {
let collision_normal = {
x: dx / distance,
y: dy / distance,
};
let relative_velocity = {
x: this.velocity.x - p.velocity.x,
y: this.velocity.y - p.velocity.y,
};
let speed =
relative_velocity.x * collision_normal.x +
relative_velocity.y * collision_normal.y;
if (speed < 0) {
let impulse = (2 * speed) / 2;
this.velocity.x -= impulse * collision_normal.x;
this.velocity.y -= impulse * collision_normal.y;
p.velocity.x += impulse * collision_normal.x;
p.velocity.y += impulse * collision_normal.y;
}
}
}
});
this.x += this.velocity.x;
this.y += this.velocity.y;
}
@ -161,6 +133,26 @@ document.addEventListener("DOMContentLoaded", function () {
}
}
function draw_connections() {
particles.forEach((particle, idx) => {
for (let i = idx + 1; i < particles.length; i++) {
let other_particle = particles[i];
let dx = other_particle.x - particle.x;
let dy = other_particle.y - particle.y;
let distance = Math.sqrt(dx * dx + dy * dy);
if (distance < connection_radius) {
ctx.strokeStyle = `rgba(255, 81, 71, ${1 - distance / connection_radius})`;
ctx.lineWidth = 0.5;
ctx.beginPath();
ctx.moveTo(particle.x, particle.y);
ctx.lineTo(other_particle.x, other_particle.y);
ctx.stroke();
}
}
});
}
function init() {
particles = [];
num_particles = Math.floor(
@ -175,9 +167,10 @@ document.addEventListener("DOMContentLoaded", function () {
function animate() {
ctx.clearRect(0, 0, canvas.width, canvas.height);
particles.forEach((particle) => {
particle.update(particles);
particle.update();
particle.draw();
});
draw_connections();
animation_frame_id = requestAnimationFrame(animate);
}