tsmathlib/src/math/vector2.ts

Typescript Version Math/Physics/CG Library

/*
 * @Author: Xu.Wang
 * @Date: 2020-04-05 20:58:19
 * @Last Modified by: Xu.Wang
 * @Last Modified time: 2020-04-05 23:42:19
 */

import { Vector } from './vector'

export class Vector2 extends Vector {
  constructor(e1: number, e2: number) {
    super(2, new Array<number>(e1, e2))
  }

  x() {
    return this.data()[0]
  }
  y() {
    return this.data()[1]
  }

  iset(v2: Vector2) {
    this.data()[0] = v2.x()
    this.data()[1] = v2.y()
  }

  set(v2: Vector2): boolean {
    return super.set(new Vector(3, v2.data()))
  }

  add(v2: any): Vector2 {
    let addv = super.add(v2)
    return new Vector2(addv.data()[0], addv.data()[1])
  }

  sub(v2: any): Vector2 {
    let subv = super.sub(v2)
    return new Vector2(subv.data()[0], subv.data()[1])
  }

  mul(v2: any): Vector2 {
    let mulv = super.mul(v2)
    return new Vector2(mulv.data()[0], mulv.data()[1])
  }

  div(v2: any): Vector2 {
    let divv = super.div(v2)
    return new Vector2(divv.data()[0], divv.data()[1])
  }

  rdiv(v2: any): Vector2 {
    let divv = super.rdiv(v2)
    return new Vector2(divv.data()[0], divv.data()[1])
  }

  dot(v2: Vector2): number {
    return super.dot(new Vector(2, v2.data()))
  }

  cross(v2: Vector2): number {
    return this.x() * v2.y() - this.y() * v2.x()
  }

  normalize() {
    super.normalize()
  }

  normalized(): Vector2 {
    let norm = super.normalized()
    return new Vector2(norm.data()[0], norm.data()[1])
  }

  tangential(): Vector2 {
    return new Vector2(this.y(), -this.x())
  }
}