Game Math Functions for TS

clamp.ts

function clamp (v: number, min: number, max: number): number {
  return Math.min(Math.max(v, min), max)
}

lerp.ts

function lerp(start: number, end: number, step: number) {
  return clamp((end-start) * step + start, start, end)
}

moveTwards.ts

function moveTowards (current: number, towards: number, maxStep: number): number {
  if (Math.abs(current - towards) < 0.01) return towards

  const diff = towards - current
  const direction = Math.abs(diff) / diff

  if (Math.abs(diff) < maxStep) maxStep = Math.abs(diff)

  return current + (direction * maxStep)
}