holdItem

How to use

triggers on self"drop item"

parameters

Parameter	Default Value	Type	Description
pos		vec2	vec2(0, -30)

example

holdItem({
  pos: vec2(0, -30)
}),

Source

component.js

function holdItem(p) {
  const param = {
    pos: vec2(0, -30),
    item: {
      sprite: "key",
      holdItemType: "key",
    },
    itemOnStart: false,
    deleteDropOnRespawn: true,
    onInteract: false,
    catchWhileHolding: true,
    ...p,
  }
  return {
    id: "holdItem",
    holdItem: null,
    add() {
      const catchItem = (obj) => {
        const catchable = obj.is("catchable")
        const isntOwn = obj.holdingParentId != this.id
        const handFree = param.catchWhileHolding || this.holdItem == null
        if (catchable && isntOwn && handFree) {
          if (this.holdItem) this.dropItem(obj.pos)
          this.setHoldingItem(obj, obj.pos)
          obj.hidden = true
          obj.collisionIgnore = ["*"]
        }
      }
      if (param.itemOnStart) this.setHoldingItem(param.item)
      if (param.onInteract) this.on("interact", (obj) => catchItem(obj))
      else this.onCollide("catchable", (obj) => catchItem(obj))
      this.on("respawn", () => {
        this.emptyHoldingItem()
        if (param.itemOnStart) this.setHoldingItem(param.item)
      })
      this.on("drop item", () => {
        this.emptyHoldingItem()
      })
    },
    setHoldingItem(item, origin = param.pos) {
      this.holdItem = { type: item.holdItemType, sprite: item.sprite }
      this.trigger("grab", { item: item, origin: origin })
    },
    emptyHoldingItem() {
      this.holdItem = null
    },
    isHolding(type) {
      return (this.holdItem && type == this.holdItem.type)
    },
    dropItem(p) {
      const item = add([
        sprite(this.holdItem.sprite),
        area(),
        anchor("bot"),
        pos(this.pos.add(param.pos)),
        catchable({ type: this.holdItem }),
      ])
      this.trigger("drop item")
      item.trigger("dropped", { pos: p, parentPos: this.pos.add(param.pos) })
      if (!param.onInteract) {
        item.holdingParentId = this.id
        item.onCollideEnd("holdItem", (obj) => { if (item.holdingParentId == this.id) item.holdingParentId = null })
      }
      item.on("player death", () => destroy(item))
    },
  }
}