throwItem

How to use

triggers on self"impact"

parameters

Parameter	Default Value	Type	Description
speed		number	800
pos		vec2	vec2(0, 0)
sprite		string	'bullet'
width		unknown	null
bulletTag		unknown	null
impactTag		string	'body'
dangerParam		object	{}
bounceParam		object	{}
startDistance		number	80
gravityScale		number	1
destroyOnImpact		boolean	false
bounciness		number	1
friction		number	0
aimAngle		number	40
type		string	'item'

example

throwItem({
  speed: 800,
  pos: vec2(0, 0),
  sprite: 'bullet',
  width: "null",
  bulletTag: "null",
  impactTag: 'body',
  dangerParam: {},
  bounceParam: {},
  startDistance: 80,
  gravityScale: 1,
  destroyOnImpact: false,
  bounciness: 1,
  friction: 0,
  aimAngle: 40,
  type: 'item'
}),

Source

component.js

function throwItem(p) {
  const param = {
    speed: 800,
    pos: vec2(0, 0),
    sprite: 'bullet',
    width: null,
    bulletTag: null,
    impactTag: 'body',
    dangerParam: {},
    bounceParam: {},
    startDistance: 80,
    gravityScale: 1,
    destroyOnImpact: false,
    bounciness: 1,
    friction: 0,
    aimAngle: 40,
    type: 'item',
    ...p,
  };
  return {
    id: 'shoot',
    add() {
      let aimAngle = param.aimAngle;
      this.on('aiming', (p) => (aimAngle = p));
      this.on('shoot', (p) => {
        const weaponParam = {
          ...param,
          ...p,
        };
        const projectile = add([
          sprite(weaponParam.sprite),
          pos(
            this.pos
              .add(weaponParam.pos)
              .add(Vec2.fromAngle(aimAngle).scale(weaponParam.startDistance))
          ),
          area({
            collisionIgnore: weaponParam.collisionIgnore,
            isSensor: true,
          }),
          anchor('center'),
          opacity(),
          body({
            gravityScale: weaponParam.gravityScale,
          }),
          rotate(aimAngle),
          danger(param.dangerParam),
          bounce({
            direction: Vec2.fromAngle(aimAngle),
            ...param.bounceParam,
          }),
          catchable({ type: p.type }),
        ]);
        if (weaponParam.bulletTag) projectile.tag(weaponParam.bulletTag);
        if (weaponParam.width) projectile.width = weaponParam.width;
        projectile.onCollide(weaponParam.impactTag, () =>
          projectile.trigger('impact')
        );
        projectile.vel = Vec2.fromAngle(aimAngle).scale(weaponParam.speed);
      });
    },
  };
}