93 lines
3.7 KiB
TypeScript
93 lines
3.7 KiB
TypeScript
class ColliderTriggerHelper {
|
||
private _entity: Entity;
|
||
/** 存储当前帧中发生的所有活动交集对 */
|
||
private _activeTriggerIntersections: Pair<Collider>[] = [];
|
||
/** 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 */
|
||
private _previousTriggerIntersections: Pair<Collider>[] = [];
|
||
private _tempTriggerList: ITriggerListener[] = [];
|
||
|
||
constructor(entity: Entity) {
|
||
this._entity = entity;
|
||
}
|
||
|
||
/**
|
||
* 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。
|
||
*/
|
||
public update() {
|
||
let colliders = this._entity.getComponents(Collider);
|
||
for (let i = 0; i < colliders.length; i++) {
|
||
let collider = colliders[i];
|
||
|
||
let neighbors = Physics.boxcastBroadphase(collider.bounds, collider.collidesWithLayers);
|
||
for (let i = 0; i < neighbors.length; i++) {
|
||
let neighbor = neighbors[i];
|
||
if (!collider.isTrigger && !neighbor.isTrigger)
|
||
continue;
|
||
|
||
if (collider.overlaps(neighbor)) {
|
||
let pair = new Pair<Collider>(collider, neighbor);
|
||
let shouldReportTriggerEvent = !this._activeTriggerIntersections.contains(pair) &&
|
||
!this._previousTriggerIntersections.contains(pair);
|
||
|
||
if (shouldReportTriggerEvent)
|
||
this.notifyTriggerListeners(pair, true);
|
||
|
||
this._activeTriggerIntersections.push(pair);
|
||
}
|
||
}
|
||
}
|
||
|
||
ListPool.free(colliders);
|
||
|
||
this.checkForExitedColliders();
|
||
}
|
||
|
||
private checkForExitedColliders(){
|
||
let tempIntersections = [];
|
||
this._previousTriggerIntersections = this._previousTriggerIntersections.filter(value => {
|
||
for (let i = 0; i < this._activeTriggerIntersections.length; i ++){
|
||
if (value == this._activeTriggerIntersections[i]){
|
||
tempIntersections.push(value);
|
||
return true;
|
||
}
|
||
}
|
||
|
||
return false;
|
||
});
|
||
|
||
for (let i = 0; i < this._previousTriggerIntersections.length; i ++){
|
||
this.notifyTriggerListeners(this._previousTriggerIntersections[i], false)
|
||
}
|
||
this._previousTriggerIntersections.length = 0;
|
||
for (let i = 0; i < tempIntersections.length; i ++){
|
||
this._previousTriggerIntersections.push(tempIntersections[i]);
|
||
}
|
||
this._activeTriggerIntersections.length = 0;
|
||
}
|
||
|
||
private notifyTriggerListeners(collisionPair: Pair<Collider>, isEntering: boolean) {
|
||
collisionPair.first.entity.getComponents("ITriggerListener", this._tempTriggerList);
|
||
for (let i = 0; i < this._tempTriggerList.length; i ++){
|
||
if (isEntering){
|
||
this._tempTriggerList[i].onTriggerEnter(collisionPair.second, collisionPair.first);
|
||
} else {
|
||
this._tempTriggerList[i].onTriggerExit(collisionPair.second, collisionPair.first);
|
||
}
|
||
|
||
this._tempTriggerList.length = 0;
|
||
|
||
if (collisionPair.second.entity){
|
||
collisionPair.second.entity.getComponents("ITriggerListener", this._tempTriggerList);
|
||
for (let i = 0; i < this._tempTriggerList.length; i ++){
|
||
if (isEntering){
|
||
this._tempTriggerList[i].onTriggerEnter(collisionPair.first, collisionPair.second);
|
||
} else {
|
||
this._tempTriggerList[i].onTriggerExit(collisionPair.first, collisionPair.second);
|
||
}
|
||
}
|
||
|
||
this._tempTriggerList.length = 0;
|
||
}
|
||
}
|
||
}
|
||
} |