55 lines
1.8 KiB
JavaScript
55 lines
1.8 KiB
JavaScript
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import { Octree } from './octree';
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import { EventBus } from '../event-bus';
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import { Vec3 } from './vec3';
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import { AABB } from './aabb';
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export class World extends EventBus {
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constructor(dimensions, octreeOptions) {
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super();
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if (!octreeOptions) {
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this.octreeOptions = {
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position: new Vec3({ x: 0, y: 0, z: 0 }),
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dimensions: new Vec3(this.dimensions),
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maxLevels: 50,
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maxObjects: 50
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};
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}
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else {
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this.octreeOptions = octreeOptions;
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}
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this.dimensions = dimensions;
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this.objects = [];
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}
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setGravity(grav) {
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this.gravity = grav;
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}
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addObject(obj) {
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this.objects.push(obj);
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}
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removeObject(obj) {
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this.objects = this.objects.filter((val) => val !== obj);
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}
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step(dt) {
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const octree = new Octree(this.octreeOptions.dimensions, this.octreeOptions.maxObjects, this.octreeOptions.maxLevels);
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this.objects.forEach((obj) => octree.insert(obj));
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this.objects.forEach((obj) => {
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let velocity = obj.velocity.clone();
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velocity.multiply(new Vec3({ x: dt, y: dt, z: dt }));
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let gravity = this.gravity.clone();
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gravity.multiply(new Vec3({ x: dt, y: dt, z: dt }));
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obj.position.add(velocity);
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if (obj.affectedByGravity) {
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obj.velocity.add(gravity);
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}
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this.checkCollisions(obj, octree);
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});
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}
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checkCollisions(obj, octree) {
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const potentialCandidates = octree.find(obj.position, obj.dimensions);
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potentialCandidates.forEach((candidate) => {
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if (AABB(obj, candidate)) {
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this.emit('collision', [obj, candidate]);
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}
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});
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}
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}
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