121 lines
3.6 KiB
JavaScript
121 lines
3.6 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 Colliders 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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this.hash = new SpatialHash(this.ecs.get(1).AreaSize);
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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 (!entity.Collider) {
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return;
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}
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entity.Collider.recalculateAabbs();
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this.hash.update(entity.Collider.aabb, entity.id);
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}
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tick() {
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const seen = {};
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for (const entity of this.ecs.changed(['Position'])) {
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if (seen[entity.id]) {
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continue;
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}
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seen[entity.id] = true;
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if (!entity.Collider) {
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continue;
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}
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const {collidingWith: wasCollidingWith} = entity.Collider;
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entity.Collider.collidingWith = {};
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this.updateHash(entity);
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for (const other of this.within(entity.Collider.aabb)) {
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if (seen[other.id]) {
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continue;
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}
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seen[other.id] = true;
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if (!other.Collider) {
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continue;
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}
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delete other.Collider.collidingWith[entity.id];
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const intersections = entity.Collider.isCollidingWith(other.Collider);
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if (intersections.length > 0) {
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entity.Collider.collidingWith[other.id] = true;
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other.Collider.collidingWith[entity.id] = true;
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if (!wasCollidingWith[other.id]) {
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if (entity.Collider.collisionStartScriptInstance) {
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const script = entity.Collider.collisionStartScriptInstance.clone();
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script.context.intersections = intersections;
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script.context.other = other;
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entity.Ticking.addTickingPromise(script.tickingPromise());
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}
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if (other.Collider.collisionStartScriptInstance) {
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const script = other.Collider.collisionStartScriptInstance.clone();
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script.context.intersections = intersections
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.map(([l, r]) => [r, l]);
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script.context.other = entity;
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other.Ticking.addTickingPromise(script.tickingPromise());
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}
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}
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for (const [, {impassable}] of intersections) {
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if (impassable) {
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entity.Position.x = entity.Position.lastX
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entity.Position.y = entity.Position.lastY
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break;
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}
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}
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}
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}
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for (const otherId in wasCollidingWith) {
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if (!entity.Collider.collidingWith[otherId]) {
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const other = this.ecs.get(otherId);
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if (!other || !other.Collider) {
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continue;
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}
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if (entity.Collider.collisionEndScriptInstance) {
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const script = entity.Collider.collisionEndScriptInstance.clone();
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script.context.other = other;
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entity.Ticking.addTickingPromise(script.tickingPromise());
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}
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if (other.Collider.collisionEndScriptInstance) {
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const script = other.Collider.collisionEndScriptInstance.clone();
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script.context.other = entity;
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other.Ticking.addTickingPromise(script.tickingPromise());
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}
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}
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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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