html-tower/static/player.js

console.log("loading player system");

const collision = (entity) => {
    // look through engine's collision components for overlap

};

const playerSystem = (engine) => {
    const entity = document.getElementById("player");
    const movementRate = 0.5;
    engine("registerEntity", entity);
    const playerTransform = engine ("getComponentContructor", "transform")(entity);

    const move = (direction) => (delta, eventData) => {
        let translation = [0,0];
        switch (direction) {
        case "left":
            translation [0] = -( movementRate * delta );
            break;
        case "right":
            translation[0] = movementRate * delta;
            break;
        case "up":
            translation[1] = - ( movementRate * delta );
            break;
        case "down":
            translation[1] = movementRate * delta;
            break;
        }
        playerTransform("translate", translation);
    };

    engine("registerEntity", entity);
    engine("addComponent", entity, "transform", playerTransform);
    // engine("")
    engine("subscribeToEvent", "moveLeft", "movePlayerLeft", move("left"));
    engine("subscribeToEvent", "moveRight", "movePlayerRight", move("right"));
    engine("subscribeToEvent", "moveUp", "movePlayerUp", move("up"));
    engine("subscribeToEvent", "moveDown", "movePlayerDown", move("down"));
};