Created
October 18, 2017 13:34
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two dimension vector class
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| class Vector { | |
| constructor (x = 0, y = 0) { | |
| this.x = x | |
| this.y = y | |
| } | |
| static add (vector1, vector2) { | |
| return new Vector ( | |
| vector1.x + vector2.x, | |
| vector1.y + vector2.y | |
| ) | |
| } | |
| static sub (vector1, vector2) { | |
| return new Vector ( | |
| vector1.x - vector2.x, | |
| vector1.y - vector2.y | |
| ) | |
| } | |
| static clone (vector) { | |
| return new Vector(vector.x, vector.y) | |
| } | |
| static fromAngle (theta, d) { | |
| return new Vector(d * Math.cos(theta), d * Math.sin(theta)) | |
| } | |
| clone () { | |
| return new Vector(this.x, this.y) | |
| } | |
| add (vector) { | |
| this.x += vector.x | |
| this.y += vector.y | |
| return this | |
| } | |
| sub (vector) { | |
| this.x -= vector.x | |
| this.y -= vector.y | |
| return this | |
| } | |
| mult (scale) { | |
| this.x *= scale | |
| this.y *= scale | |
| return this | |
| } | |
| div (scale) { | |
| this.x /= scale | |
| this.y /= scale | |
| return this | |
| } | |
| mag () { | |
| return Math.sqrt(this.x * this.x + this.y * this.y) | |
| } | |
| setMag(mag) { | |
| this.normalize() | |
| this.mult(mag) | |
| return this | |
| } | |
| normalize () { | |
| let m = this.mag() | |
| if (m != 0) { | |
| this.div(m) | |
| } | |
| return this | |
| } | |
| limit (max) { | |
| if (this.mag() > max) { | |
| this.normalize() | |
| this.mult(max) | |
| } | |
| return this | |
| } | |
| heading () { | |
| return -Math.atan2(this.x, this.y) | |
| } | |
| } | |
| export default Vector |
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