pointlist

A PointList maintains many Point objects. It's secretly just an Array (with some extra function for convenience).

Getting Started

A PointList accepts many points.

const points = new PointList(
                    new Point(100, 200),
                    new Point(350, 200),
                    new Point(700, 200),
                    // ...
                );

You gain typical array functionality.

/* Iterate every point in the list */
points.forEach(point=>console.log(point))

Plus a few poly extras, such as the pen tooling.

/*_Pen_ methods exist for easy drawing:*/
points.pen.indicators(ctx, {color: 'green'})

Casting

We can load Point specific values for each entry, then cast() them in-place as Point types:

const objects = new PointList(
     { x: 300, y: 100, vx: 0, vy: 0}
    , { x: 500, y: 100, vx: 0, vy: 0}
    , { x: 700, y: 100, vx: 0, vy: 0}
    , { x: 900, y: 100, vx: 0, vy: 0}
)

const points = objects.cast()

Generate

Generate 100 random points:

randomPoints = PointList.generate.random(100)

Generate a circle of points:

pointCount = 100
radius = 100
topLeftOrigin = point(200,200)

circle = PointList.generate.radius(pointCount, radius, topLeftOrigin)

Iterate and edit:

randomPoints = PointList.generate.random(100)
randomPoints.forEach(p => {
    let mass = Math.random() * 10
    p.mass = mass
    p.rotation = Math.random() * 360
    p.radius = Math.max(5, mass)
})