104 lines
4.6 KiB
TypeScript
104 lines
4.6 KiB
TypeScript
module es {
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/**
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* 移动器使用的帮助器类，用于管理触发器碰撞器交互并调用itriggerlistener
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*/
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export class ColliderTriggerHelper {
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private _entity: Entity;
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/** 存储当前帧中发生的所有活动交集对 */
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private _activeTriggerIntersections: Pair<Collider>[] = [];
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/** 存储前一帧的交叉对，以便我们可以在移动该帧后检测出口 */
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private _previousTriggerIntersections: Pair<Collider>[] = [];
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private _tempTriggerList: ITriggerListener[] = [];
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constructor(entity: Entity) {
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this._entity = entity;
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}
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/**
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* 实体被移动后，应该调用更新。它会处理碰撞器重叠的任何itriggerlistener。
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*/
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public update() {
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let colliders = this._entity.getComponents(Collider);
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for (let i = 0; i < colliders.length; i++) {
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let collider = colliders[i];
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let neighbors = Physics.boxcastBroadphase(collider.bounds, collider.collidesWithLayers);
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for (let j = 0; j < neighbors.length; j++) {
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let neighbor = neighbors[j];
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if (!collider.isTrigger && !neighbor.isTrigger)
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continue;
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if (collider.overlaps(neighbor)) {
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let pair = new Pair<Collider>(collider, neighbor);
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let shouldReportTriggerEvent = this._activeTriggerIntersections.findIndex(value => {
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return value.first == pair.first && value.second == pair.second;
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}) == -1 && this._previousTriggerIntersections.findIndex(value => {
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return value.first == pair.first && value.second == pair.second;
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}) == -1;
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if (shouldReportTriggerEvent)
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this.notifyTriggerListeners(pair, true);
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if (!this._activeTriggerIntersections.contains(pair))
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this._activeTriggerIntersections.push(pair);
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}
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}
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}
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ListPool.free(colliders);
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this.checkForExitedColliders();
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}
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private checkForExitedColliders(){
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for (let i = 0; i < this._activeTriggerIntersections.length; i ++){
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let index = this._previousTriggerIntersections.findIndex(value => {
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if (value.first == this._activeTriggerIntersections[i].first && value.second == this._activeTriggerIntersections[i].second)
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return true;
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return false;
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});
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if (index != -1)
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this._previousTriggerIntersections.removeAt(index);
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}
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for (let i = 0; i < this._previousTriggerIntersections.length; i ++){
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this.notifyTriggerListeners(this._previousTriggerIntersections[i], false)
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}
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this._previousTriggerIntersections.length = 0;
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for (let i = 0; i < this._activeTriggerIntersections.length; i ++){
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if (!this._previousTriggerIntersections.contains(this._activeTriggerIntersections[i])){
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this._previousTriggerIntersections.push(this._activeTriggerIntersections[i]);
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}
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}
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this._activeTriggerIntersections.length = 0;
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}
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private notifyTriggerListeners(collisionPair: Pair<Collider>, isEntering: boolean) {
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collisionPair.first.entity.getComponents("ITriggerListener", this._tempTriggerList);
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for (let i = 0; i < this._tempTriggerList.length; i ++){
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if (isEntering){
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this._tempTriggerList[i].onTriggerEnter(collisionPair.second, collisionPair.first);
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} else {
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this._tempTriggerList[i].onTriggerExit(collisionPair.second, collisionPair.first);
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}
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this._tempTriggerList.length = 0;
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if (collisionPair.second.entity){
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collisionPair.second.entity.getComponents("ITriggerListener", this._tempTriggerList);
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for (let i = 0; i < this._tempTriggerList.length; i ++){
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if (isEntering){
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this._tempTriggerList[i].onTriggerEnter(collisionPair.first, collisionPair.second);
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} else {
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this._tempTriggerList[i].onTriggerExit(collisionPair.first, collisionPair.second);
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}
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}
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this._tempTriggerList.length = 0;
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}
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}
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}
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}
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}
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