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Orbs spiral inwards

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This commit is contained in:
Greg Shuflin 2023-10-24 20:15:27 -07:00
parent f4e6862113
commit 991b564f16
1 changed files with 16 additions and 3 deletions
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19
src/orbital-trails/app.js
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@ -32,6 +32,7 @@ const options = {
centerLight: true,
lightAlpha: 5,
perfectRed: false,
spiralInwards: false,
};
const Orb = function(x, y) {
@ -45,12 +46,22 @@ const Orb = function(x, y) {
this.radius = Math.sqrt(dx * dx + dy * dy);
this.size = ( this.radius / 300 ) + 1;
this.speed = ( random(1, 10) / 300000 ) * ( this.radius ) + 0.015;
this.removed = false;
};
Orb.prototype.update = function() {
const speed = options.speed;
this.lastAngle = this.angle;
this.angle += this.speed * ( speed / 50 ) * state.dt;
if (options.spiralInwards) {
if (this.radius === 0) {
this.removed = true;
} else {
this.radius -= 1;
}
}
this.x = this.radius * Math.cos( this.angle );
this.y = this.radius * Math.sin( this.angle );
};
@ -58,7 +69,7 @@ Orb.prototype.update = function() {
Orb.prototype.render = function(timestamp) {
this.update();
const radius = this.radius;
const radius = this.radius > 0 ? this.radius : 0;
// perfect-red = 0
const offset = timestamp / options.speed;
@ -104,7 +115,6 @@ Orb.prototype.render = function(timestamp) {
const createOrb = (x, y) => {
console.log(`Creating orb ${x}, ${y}`);
state.orbs.push(new Orb(x, y));
state.total += 1;
};
@ -129,7 +139,7 @@ const clear = () => {
const controls = new dat.GUI( { autoPlace: false } )
const container = document.querySelector("#controlPanel");
controls.add(state, "total" ).name( "Total Placed" ).listen();
controls.add(state, "total" ).name("Total Orbs").listen();
controls.add(options, "speed" ).min(-300).max(300).step(10).name("Speed");
controls.add(options, "scale" ).min(0.5).max(5).step(0.1).name("Scale");
@ -137,6 +147,7 @@ controls.add(options, "fadeout").min(0).max(100).step(1).name("Fadeout (/100)");
controls.add(options, "centerLight" ).name("Toggle Light");
controls.add(options, "lightAlpha" ).min(0).max(100).step(1).name("Light Alpha");
controls.add(options, "perfectRed").name("Perfect Red");
controls.add(options, "spiralInwards").name("Spiral Inwwards");
container.appendChild(controls.domElement);
@ -151,6 +162,8 @@ const loop = (timestamp) => {
state.orbs.forEach((orb) => {
orb.render(timestamp);
});
state.orbs = state.orbs.filter((orb) => !orb.removed);
state.total = state.orbs
ctx.restore();
};