64 lines
1.3 KiB
JavaScript
64 lines
1.3 KiB
JavaScript
import * as world from "./world.mjs";
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const BOX_SIZE = world.BOX_SIZE;
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const entities = [];
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export function create (box, x = 0, y = 0, color = "#fff") {
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const entity = {
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id: entities.length,
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box,
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x,
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y,
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color,
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};
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entities.push(entity);
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return entity;
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}
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export function destroy (id) {
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// returns the destroyed entity, idk if that makes sense.
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return entities.splice(id, 1)[0];
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}
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export function for_each (callback) {
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entities.forEach(entity => {
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callback(entity, entity.id);
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});
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}
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function clamp_pos (entity) {
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if (entity.x < 0) entity.x = 0;
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if (entity.x >= BOX_SIZE) entity.x = BOX_SIZE - 1;
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if (entity.y < 0) entity.y = 0;
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if (entity.y >= BOX_SIZE) entity.y = BOX_SIZE - 1;
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return entity;
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}
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export function set_pos (entity, x, y) {
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entity.x = x;
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entity.y = y;
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if (out_of_bounds(entity)) {
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if (entity.box.parent) {
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entity.box = entity.box.parent;
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// TODO: exit from side of box.
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}
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clamp_pos(entity);
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}
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if (world.get_tile(entity.box, entity.x, entity.y)?.type === "box") {
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entity.box = world.get_tile(entity.box, entity.x, entity.y).box;
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// TODO: enter at edge of box.
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}
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}
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export function move (entity, d_x, d_y) {
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set_pos(entity, entity.x + d_x, entity.y + d_y);
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}
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function out_of_bounds (entity) {
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return world.out_of_bounds(entity.x, entity.y);
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}
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