64 lines
1.9 KiB
TypeScript
64 lines
1.9 KiB
TypeScript
import { assert } from "https://deno.land/std@0.221.0/assert/assert.ts";
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import { v2 } from "../../common/utils.ts";
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import { Vec2 } from "../../common/utils.ts";
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import { CompDisplay } from "../components/display.ts";
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import { query_in_rect } from "../components/world.ts";
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import { CompPos } from "../components/world.ts";
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import { CompId, Query } from "../engine.ts";
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import { Engine } from "../engine.ts";
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import { CompPlayer } from "./player.ts";
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export class CompEnemy {
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target;
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life;
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constructor() {
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this.target = null as number | null;
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this.life = 10;
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}
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get_target_pos(engine: Engine) {
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if (this.target === null) return null;
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const result = engine.one(Query.with(CompId).filter(([c]) => c.id === this.target).with(CompPos));
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if (result === null) return null;
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const [_, pos] = result;
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return pos.pos;
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}
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find_target_from(engine: Engine, pos: Vec2) {
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const RANGE = v2(2, 2);
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const found = engine.one(Query.with(CompPlayer).with(CompId).and(query_in_rect(pos.sub(RANGE), pos.add(RANGE))));
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if (found === null) return this.target = null;
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const [_, id, __] = found;
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return this.target = id.id;
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}
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}
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export function sys_spawn_enemy(pos: Vec2) {
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return (engine: Engine) => {
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return engine.spawn((entity) =>
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entity.insert(
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new CompEnemy(),
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new CompPos(entity, pos),
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new CompDisplay("èé"),
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)
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);
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};
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}
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export function sys_update_enemy() {
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return (engine: Engine) => {
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for (const [enemy, enemy_pos] of engine.all(Query.with(CompEnemy).with(CompPos))) {
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if (enemy.target === null) enemy.find_target_from(engine, enemy_pos.pos);
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if (enemy.target === null) continue;
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const pos = enemy.get_target_pos(engine);
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assert(pos !== null);
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const direction = pos.sub(enemy_pos.pos);
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enemy_pos.move_collide(engine, direction.normalize());
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}
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};
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}
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export function enemy_plugin(engine: Engine) {
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engine.global_system_loop(sys_update_enemy(), 500);
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}
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