lentil/gravity
lentil/gravity
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calibrations

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Ladd 2025-12-31 19:03:15 -06:00
parent a50c7c2a58
commit 106707d6b2
3 changed files with 17 additions and 10 deletions
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9
object.js
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@ -36,11 +36,16 @@ export class MassObject {
this.color.r = Math.random() * 256;
this.color.g = Math.random() * 256;
this.color.b = Math.random() * 256;
this.created = document.timeline.currentTime;
this.timeCreated = this.sim.time;
this.rawTimeCreated = this.sim.rawTime;
}
get age() {
return document.timeline.currentTime - this.created;
return this.sim.time - this.timeCreated;
}
get rawAge() {
return this.sim.rawTime - this.rawTimeCreated;
}
get radius() {

8
sim-options.js
View File

@ -15,10 +15,10 @@ export const simOptions = {
merge: ['Merge Masses<br>on Collision', 'boolean', true, {wide: true}],
},
param: {
gravity: ['Gravity', 'number', 4E4],
timeScale: ['Time Scale', 'number', 0.2],
massCreationRate: ['Mass Creation Rate', 'number', 10],
massAcceleration: ['Mass Rate Accel', 'boolean', true, {wide: true}],
gravity: ['Gravity', 'number', 1],
timeScale: ['Time Scale', 'number', 0.1],
massCreationRate: ['Mass Creation Rate', 'number', 1],
massAcceleration: ['Mass Rate Accel', 'boolean', false, {wide: true}],
},
debug: {
objectsInfo: ['Objects Info', 'boolean', false],

10
system.js
View File

@ -157,8 +157,8 @@ export class System {
// Convert pointer velocity to simulation scale
// Including time scale - if time is slow, our motion is relatively faster
const pointer = {...this.sim.pointer.latestVelocity};
obj.velocity.x = pointer.x / this.sim.display.scale * this.sim.timeScale;
obj.velocity.y = pointer.y / this.sim.display.scale * this.sim.timeScale;
obj.velocity.x = pointer.x / this.sim.display.scale / this.sim.timeScale;
obj.velocity.y = pointer.y / this.sim.display.scale / this.sim.timeScale;
if (this.sim.panning?.velocity) {
obj.velocity.x += this.sim.panning.velocity.x;
obj.velocity.y += this.sim.panning.velocity.y;
@ -242,9 +242,11 @@ export class System {
let massCreationRate = this.sim.getOption('param.massCreationRate');
// Mass creation rate acceleration
if (this.sim.getOption('param.massAcceleration')) {
massCreationRate *= obj.age;
// TODO: Separate parameter for mass creation acceleration rate
massCreationRate *= obj.rawAge;
}
obj.mass += massCreationRate * elapsedTime;
// Keep consistent time scale
obj.mass += massCreationRate * elapsedTime / this.sim.timeScale;
}
// Calculate forces due to gravity.