54 lines
1.2 KiB
JavaScript
54 lines
1.2 KiB
JavaScript
import {compose, virtualize} from '@avocado/core';
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import {Vector} from '@avocado/math';
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const decorate = compose(
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virtualize([
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'addBody',
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'createBody',
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]),
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);
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export class AbstractWorld extends decorate(class {}) {
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constructor() {
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super();
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this.entities = new Map();
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this.entitiesList = [];
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}
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associateBodyWithEntity(body, entity) {
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this.entities.set(body, entity);
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this.entitiesList.push(entity);
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body.position = entity.position;
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}
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removeBody(body) {
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if (this.entities.has(body)) {
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const entity = this.entities.get(body);
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this.entities.delete(body);
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const index = this.entitiesList.indexOf(entity);
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if (-1 !== index) {
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this.entitiesList.splice(index, 1);
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}
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}
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}
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tick(elapsed) {
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// Propagate position updates.
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for (let i = 0; i < this.entitiesList.length; ++i) {
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const entity = this.entitiesList[i];
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const entityPosition = entity.position;
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const bodyPosition = entity.body.position;
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// Hot.
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if (
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(entityPosition[0] << 0) === (bodyPosition[0] << 0)
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&& (entityPosition[1] << 0) === (bodyPosition[1] << 0)
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) {
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continue;
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}
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entity.setPosition(entity.body.position);
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}
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}
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}
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