sys_spawn

Instantiate blueprints into the world periodically. Spawned entities inherit the spawner's position and rotation.

import {instantiate} from "../../lib/game.js"; import {mat4_get_rotation, mat4_get_translation} from "../../lib/mat4.js"; import {Quat, Vec3} from "../../lib/math.js"; import {Entity} from "../../lib/world.js"; import {copy_position, copy_rotation} from "../components/com_transform.js"; import {Game} from "../game.js"; import {Has} from "../world.js";

export function sys_spawn(game: Game, delta: number) { for (let i = 0; i < game.World.Signature.length; i++) { if ((game.World.Signature[i] & QUERY) == QUERY) { update(game, i, delta); } } }

function update(game: Game, entity: Entity, delta: number) { let spawn = game.World.Spawn[entity]; spawn.SinceLast += delta; if (spawn.SinceLast > spawn.Interval) { spawn.SinceLast = 0; let entity_transform = game.World.Transform[entity]; mat4_get_translation(world_position, entity_transform.World); mat4_get_rotation(world_rotation, entity_transform.World); instantiate(game, [ ...spawn.Creator(game), copy_position(world_position), copy_rotation(world_rotation), ]); } }