Features

• Methods of line transformation (add, sub, mult, div)
• Determine line intersection coordinates with 3D shapes
• Standard form linear gradient equations

Installation

• This package can be installed with npm:

npm install line3

API

Object Definition

const Line3 = require("line3") // https://www.npmjs.com/package/line3
const Vec3 = require("vec3") // https://www.npmjs.com/package/vec3
const Rect = [[x1, y1, z1], [x2, y2, z2]] // values are a number
const Face = [x, y, z] // values are 0 or 1

Methods

// creating a new line
let line = new Line3(x1, y1, z1, x2, y2, z2)
let line =  Line3.fromVec(a, b) // parameters are Vec3

// reference an existing line (clone or modify)
line.get()
line.set(x1, y1, z1, x2, y2, z2)

// line transformation (clone)
line.getPlus(x, y, z)
line.getDiff(x, y, z)
line.getMult(x, y, z)
line.getDiv (x, y, z)

// line transformation (modify)
line.setPlus(x, y, z)
line.setDiff(x, y, z)
line.setMult(x, y, z)
line.setDiv (x, y, z)

// "Math" functions (clone)
line.getFloor()
line.getCeil()

// "Math" functions (modify)
line.setFloor()
line.setCeil()

//  f(x) = g(y) = h(z) standard form methods, returns a number or null
line.xyGradient()
line.zyGradient()
line.xzGradient()
line.xyOffset(gradient)
line.zyOffset(gradient)
line.xzOffset(gradient)

// line intersection, returns Vec3 or null
line.lineIntercept(line) // "line" is a Line3
line.rectIntercept(rect) // "rect" is a Rect

// miscellaneous functions
line.rectFace() // returns a Face (the index for a Rect's visible faces)
line.scale(axis, constant) // returns a Vec3 (the position relative to a constant on the line)
line.iterate(length) // returns a Vec3[] array (positional increments on the line)