Function updateParticle

frontend/src/ts/elements/monkey-power.ts:93–123

* @param {Particle} particle

(particle: Particle)

 * @param {Particle} particle
 */
function updateParticle(particle: Particle): void {
  if (!ctx.canvas || !isSafeNumber(ctx.deltaTime)) return;

  particle.prev.x = particle.x;
  particle.prev.y = particle.y;
  // Update pos
  particle.x += particle.vel.x * ctx.deltaTime;
  particle.y += particle.vel.y * ctx.deltaTime;

  if (particle.x > ctx.canvas.width) {
    particle.vel.x *= -particleBounceMod;
    particle.x =
      ctx.canvas.width - (particle.x - ctx.canvas.width) * particleBounceMod;
  } else if (particle.x < 0) {
    particle.vel.x *= -particleBounceMod;
    particle.x *= -particleBounceMod;
  }
  if (particle.y > ctx.canvas.height) {
    particle.vel.y *= -particleBounceMod;
    particle.y =
      ctx.canvas.height - (particle.y - ctx.canvas.height) * particleBounceMod;
  } else if (particle.y < 0) {
    particle.vel.y *= -1;
    particle.y *= -1;
  }

  particle.vel.y += gravity * ctx.deltaTime;
  particle.vel.x *= 1 - drag * ctx.deltaTime;

  particle.alpha *= 1 - particleFade * ctx.deltaTime;
}

export function init(): void {
  ctx.caret = qsr("#caret");