87 lines
2.0 KiB
JavaScript
87 lines
2.0 KiB
JavaScript
import {System} from '@/ecs/index.js';
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import SpatialHash from '@/util/spatial-hash.js';
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export default class VisibleAabbs extends System {
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hash;
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deindex(entities) {
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super.deindex(entities);
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for (const id of entities) {
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this.hash.remove(id);
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}
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}
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static get priority() {
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return {
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after: 'IntegratePhysics',
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};
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}
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reindex(entities) {
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for (const id of entities) {
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if (1 === id) {
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const {AreaSize} = this.ecs.get(1)
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if (AreaSize) {
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const {x, y} = AreaSize;
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if (
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!this.hash ||
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(
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this.hash.area.x !== x
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|| this.hash.area.y !== y
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)
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) {
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this.hash = new SpatialHash(this.ecs.get(1).AreaSize);
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}
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}
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}
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}
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super.reindex(entities);
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for (const id of entities) {
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this.updateHash(this.ecs.get(id));
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}
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}
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updateHash(entity) {
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if (!this.hash) {
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return;
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}
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if (!entity.VisibleAabb) {
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this.hash.remove(entity.id);
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return;
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}
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this.hash.update(entity.VisibleAabb, entity.id);
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}
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tick() {
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for (const entity of this.ecs.changed(['Position'])) {
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const {Position: {x, y}, Sprite, VisibleAabb} = entity;
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if (VisibleAabb) {
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let size = undefined;
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if (Sprite) {
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size = Sprite.size;
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}
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/* v8 ignore next 3 */
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if (!size) {
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throw new Error(`no size for aabb for entity ${entity.id}(${JSON.stringify(entity.toJSON(), null, 2)})`);
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}
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VisibleAabb.x0 = x - Sprite.anchor.x * size.w;
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VisibleAabb.x1 = x + (1 - Sprite.anchor.x) * size.w;
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VisibleAabb.y0 = y - Sprite.anchor.y * size.h;
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VisibleAabb.y1 = y + (1 - Sprite.anchor.y) * size.h;
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this.updateHash(entity);
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}
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}
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}
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within(query) {
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const within = new Set();
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for (const id of this.hash.within(query)) {
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within.add(this.ecs.get(id));
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}
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return within;
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}
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}
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