shootBullet

Permet à un objet de lancer une balle lorsqu'un joueur appuie sur shootKey

How to use

triggers on self"hit"

parameters

Parameter	Default Value	Type	Description
speed		number	1200
margin		vec2	vec2(36, 32)
duration		number	4
fadeDuration		number	0.4
bulletSprite		string	"bullet"
bulletWidth		number	20
tag		string	"alive"
damage		number	1
ongoing		boolean	false
bulletReversed		boolean	false
collisionIgnore		array	["player"]

example

shootBullet({
  speed: 1200,
  margin: vec2(36, 32),
  duration: 4,
  fadeDuration: 0.4,
  bulletSprite: "bullet",
  bulletWidth: 20,
  tag: "alive",
  damage: 1,
  ongoing: false,
  bulletReversed: false,
  collisionIgnore: ["player"]
}),

Source

component.js

function shootBullet(p) {
  const param = {
    speed: 1200,
    margin: vec2(36, 32),
    duration: 4,
    fadeDuration: 0.4,
    bulletSprite: "bullet",
    bulletWidth: 20,
    tag: "alive",
    damage: 1,
    ongoing: false,
    bulletReversed: false,
    collisionIgnore: ["player"],
    ...p,
  }
  return {
    id: "shoot bullet",
    add() {
      this.on("shoot", (facing = 1) => {
        const direction = vec2(facing, 0)
        const x = this.pos.x + param.margin.x * facing
        const y = this.pos.y - param.margin.y
        const bullet = add([
          sprite(param.bulletSprite, { width: param.bulletWidth }),
          pos(x, y),
          lifespan(param.duration, { fade: param.fadeDuration }),
          move(direction.angle(vec2(0, 0)), param.speed),
          area({ collisionIgnore: param.collisionIgnore }),
          anchor("center"),
          opacity(),
          danger({ tag: param.tag, damage: param.damage, ongoing: param.ongoing, }),
          "projectile",
        ])
        bullet.onCollide("body", () => {
          destroy(bullet)
          bullet.trigger("hit")
        })
        if ((!param.bulletReversed && facing == -1) || (param.bulletReversed && facing == 1)) bullet.flipX = true
      })
    },
  }
}