/*
title: Spring Forces Distributed With Time
tags: springs
categories: springs
files:
../point_src/core/head.js
../point_src/pointpen.js
../point_src/pointdraw.js
../point_src/math.js
../point_src/extras.js
../point_src/point-content.js
../point_src/pointlistpen.js
../point_src/pointlist.js
../point_src/events.js
../point_src/point.js
../point_src/distances.js
../point_src/dragging.js
../point_src/stage.js
../point_src/automouse.js
../point_src/functions/springs.js
../point_src/functions/clamp.js
../point_src/setunset.js
../point_src/stroke.js
*/
class MainStage extends Stage {
// canvas = document.getElementById('playspace');
canvas = 'playspace'
mounted(){
this.points = new PointList(
new Point({
x: 150, y: 230
, radius: 10
, vx: .1, vy: 0
, mass: 10
})
, new Point({
x: 350, y: 200
, vx: 2, vy: 0
, radius: 12
, mass: 12
})
, new Point({
x: 250, y: 270
, vx: .4, vy: -1
, radius: 8
, mass: 8
})
)
this.dragging.addPoints(...this.points)
this.dragging.onWheel = this.onWheel.bind(this)
this.dragging.onDragStart = this.onDragStart.bind(this)
this.dragging.onDragEnd = this.onDragEnd.bind(this)
this.restLength = 100;
this.springConstant = .6;
this.dampingFactor = 0.99; // Adjust this value between 0 and 1
}
onDragStart(ev, p) {
this.dragPoint = p
}
onDragEnd(ev, p) {
this.dragPoint = undefined
}
onWheel(ev, p) {
p.mass = p.radius
}
draw(ctx){
this.clear(ctx)
let mouse = Point.mouse.position
let ps = this.points;
let sv = this.dragPoint != undefined? [this.dragPoint]: [];
const lockedPoints = new Set(sv)//ps[0]]); // Lock pointA in place
const restLength = this.restLength
const springConstant = this.springConstant
const dampingFactor = this.dampingFactor
const deltaTime = .1
const f = applySpringForceDistributedWithTime
// const f = applySpringForceDistributed
// const f = applySpringForce //applySpringForceDistributed
f(ps[0], ps[1], restLength, springConstant, dampingFactor, lockedPoints, deltaTime);
f(ps[1], ps[2], restLength, springConstant, dampingFactor, lockedPoints, deltaTime);
f(ps[2], ps[0], restLength, springConstant, dampingFactor, lockedPoints, deltaTime);
// this.points.last().rotation += 2
this.points.pen.indicators(ctx)
}
}
stage = MainStage.go(/*{ loop: true }*/)