76 lines
2.1 KiB
JavaScript
76 lines
2.1 KiB
JavaScript
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import Component from '@/ecs/component.js';
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import {intersects} from '@/util/math.js';
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import vector2d from './helpers/vector-2d';
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export default class Collider extends Component {
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instanceFromSchema() {
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const {ecs} = this;
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return class ColliderInstance extends super.instanceFromSchema() {
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isCollidingWith(other) {
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const {aabb, aabbs} = this;
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const {aabb: otherAabb, aabbs: otherAabbs} = other;
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if (!intersects(aabb, otherAabb)) {
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return false;
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}
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for (const aabb of aabbs) {
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for (const otherAabb of otherAabbs) {
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if (intersects(aabb, otherAabb)) {
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return true;
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}
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}
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}
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return false;
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}
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isWithin(query) {
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const {aabb, aabbs} = this;
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if (!intersects(aabb, query)) {
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return false;
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}
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for (const aabb of aabbs) {
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if (intersects(aabb, query)) {
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return true;
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}
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}
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return false;
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}
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recalculateAabbs() {
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const {Position: {x: px, y: py}} = ecs.get(this.entity);
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this.aabb = {x0: Infinity, x1: -Infinity, y0: Infinity, y1: -Infinity};
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this.aabbs = [];
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const {bodies} = this;
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for (const points of bodies) {
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let x0 = Infinity, x1 = -Infinity, y0 = Infinity, y1 = -Infinity;
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for (const point of points) {
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const x = point.x + px;
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const y = point.y + py;
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if (x < x0) x0 = x;
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if (x < this.aabb.x0) this.aabb.x0 = x;
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if (x > x1) x1 = x;
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if (x > this.aabb.x1) this.aabb.x1 = x;
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if (y < y0) y0 = y;
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if (y < this.aabb.y0) this.aabb.y0 = y;
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if (y > y1) y1 = y;
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if (y > this.aabb.y1) this.aabb.y1 = y;
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}
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this.aabbs.push({
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x0: x0 > x1 ? x1 : x0,
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x1: x0 > x1 ? x0 : x1,
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y0: y0 > y1 ? y1 : y0,
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y1: y0 > y1 ? y0 : y1,
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});
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}
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}
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}
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}
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static properties = {
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bodies: {
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type: 'array',
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subtype: {
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type: 'array',
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subtype: vector2d('int16'),
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},
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},
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};
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}
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