rotatingBlock

Fait tourner des objets autour d'un point

How to use

requiresight()

parameters

Parameter	Default Value	Type	Description
tag		string	'rotate'
speed		number	60
rotateSprite		boolean	false
relativeSpeed		boolean	true
offset		vec2	vec2(0, 0)

example

rotatingBlock({
  tag: 'rotate',
  speed: 60,
  rotateSprite: false,
  relativeSpeed: true,
  offset: vec2(0, 0)
}),

Source

component.js

function rotatingBlock(p) {
  const param = {
    tag: 'rotate',
    speed: 60,
    rotateSprite: false,
    relativeSpeed: true,
    offset: vec2(0, 0),
    ...p,
  };
  return {
    rotationTarget: null,
    currentRotation: 0,
    rotationDistance: 0,
    startingRotation: 0,
    require: ['sight'],
    add() {
      let on = false;
      let rotationCenter = null;
      let startRotation = null;
      let rotation = 0;
      let distance = null;

      this.on('target found', () => {
        startRotation = -this.currentTarget.pos.angle(this.pos);
        distance = this.currentTarget.pos.dist(this.pos);
        this.pos = this.currentTarget.pos.add(
          Vec2.fromAngle(startRotation).scale(distance)
        );
        on = true;
      });
      onUpdate(() => {
        if (on) {
          if (param.relativeSpeed)
            rotation += ((dt() * param.speed) / distance) * 100;
          else rotation += dt() * param.speed;
          this.pos = Vec2.fromAngle(rotation + startRotation)
            .scale(distance)
            .add(this.currentTarget.pos);
          if (param.rotateSprite) this.angle = rotation;
        }
      });
    },
  };
}