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import {
Jump,
Forces,
Acceleration,
ComponentNames,
Velocity,
Mass,
} from "../components";
import { Game } from "../Game";
import { KeyConstants, PhysicsConstants } from "../config";
import type { Entity } from "../entities";
import { Action } from "../interfaces";
import { System, SystemNames } from "./";
/**
* TODO: Make velocities reset on each game loop (as similar to acceleration)
*/
export class Input extends System {
private keys: Set<string>;
private actionTimeStamps: Map<Action, number>;
constructor() {
super(SystemNames.Input);
this.keys = new Set<number>();
this.actionTimeStamps = new Map<Action, number>();
}
public keyPressed(key: string) {
this.keys.add(key);
}
public keyReleased(key: string) {
this.keys.delete(key);
}
private hasSomeKey(keys: string[]): boolean {
return keys.some((key) => this.keys.has(key));
}
public update(dt: number, game: Game) {
game.componentEntities.get(ComponentNames.Control)?.forEach((entityId) => {
const entity = game.entities.get(entityId);
if (!entity.hasComponent(ComponentNames.Velocity)) {
return;
}
const velocity = entity.getComponent<Velocity>(ComponentNames.Velocity);
if (this.hasSomeKey(KeyConstants.ActionKeys.get(Action.MOVE_RIGHT))) {
velocity.dCartesian.dx = PhysicsConstants.PLAYER_MOVE_VEL;
} else if (
this.hasSomeKey(KeyConstants.ActionKeys.get(Action.MOVE_LEFT))
) {
velocity.dCartesian.dx = -PhysicsConstants.PLAYER_MOVE_VEL;
} else {
velocity.dCartesian.dx = 0;
}
});
game.componentEntities.get(ComponentNames.Jump)?.forEach((entityId) => {
const entity = game.entities.get(entityId);
const jump = entity.getComponent<Jump>(ComponentNames.Jump);
const velocity = entity.getComponent<Velocity>(ComponentNames.Velocity);
if (this.hasSomeKey(KeyConstants.ActionKeys.get(Action.JUMP))) {
if (jump.canJump) {
this.actionTimeStamps.set(Action.JUMP, performance.now());
velocity.dCartesian.dy = PhysicsConstants.PLAYER_JUMP_INITIAL_VEL;
jump.canJump = false;
}
if (
performance.now() - this.actionTimeStamps.get(Action.JUMP) <
PhysicsConstants.MAX_JUMP_TIME_MS
) {
const mass = entity.getComponent<Mass>(ComponentNames.Mass).mass;
entity.getComponent<Forces>(ComponentNames.Forces)?.forces.push({
fCartesian: { fy: mass * PhysicsConstants.PLAYER_JUMP_ACC },
});
}
}
});
}
}
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