fly

Permet à un objet de descendre lorsqu'un autre objet est dessus

How to use

parameters

Parameter	Default Value	Type	Description
fallSpeed		number	40
magnetic		boolean	true
speed		number	60
wanderDistance		number	0
stopdistance		number	6
rotateDelay		number	0.8
collisionIgnore		boolean	true

example

fly({
  fallSpeed: 40,
  magnetic: true,
  speed: 60,
  wanderDistance: 0,
  stopdistance: 6,
  rotateDelay: 0.8,
  collisionIgnore: true
}),

Source

component.js

function fly(p) {
  const param = {
    fallSpeed: 40,
    magnetic: true,
    speed: 60,
    wanderDistance: 0,
    stopdistance: 6,
    rotateDelay: 0.8,
    collisionIgnore: true,
    ...p
  }
  return {
    magneticPos: null,
    falling: false,
    id: "fly",
    wanderTarget: null,
    wanderOrientation: vec2(0, 0),
    add() {
      this.onLand(() => this.falling = true)
      this.onCollideUpdate((obj, col) => this.checkFlyColission(obj, col))
      this.onCollideEnd(() => this.falling = false)
      requestAnimationFrame(() => {
        this.magneticPos = vec2(this.pos)
        this.setWanderTarget()
      })
      if (param.collisionIgnore) this.collisionIgnore.push("fly")
    },
    checkFlyColission(obj, col) {
      if (obj.is("body") && !obj.is("fly") && !obj.isStatic && col.isTop()) {
        this.move(0, param.fallSpeed)
        obj.move(0, param.fallSpeed)
        this.falling = true
      }
    },
    update() {
      tween(
        this.wanderOrientation,
        Vec2.fromAngle(this.wanderTarget.sub(this.pos).angle()),
        param.rotateDelay,
        (v) => this.wanderOrientation = v
      )
      if (param.magnetic) {
        if (!this.falling) {
          if (this.pos.dist(this.wanderTarget) > param.stopdistance) {
            this.move(this.wanderOrientation.scale(param.speed))
          }
          else this.setWanderTarget()
        }
      }
      if (this.falling) this.move(0, param.fallSpeed)
    },
    setWanderTarget() {
      const direction = Vec2.fromAngle(rand(360))
      const movement = direction.scale(rand(param.wanderDistance))
      this.wanderTarget = this.magneticPos.add(movement)
    },
  }
}