96 lines
3.9 KiB
TypeScript
96 lines
3.9 KiB
TypeScript
module es {
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/**
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* 辅助类说明了一种处理移动的方法，它考虑了包括触发器在内的所有冲突。
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* ITriggerListener接口用于管理对移动过程中违反的任何触发器的回调。
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* 一个物体只能通过移动器移动。要正确报告触发器的move方法。
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*
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* 请注意，多个移动者相互交互将多次调用ITriggerListener。
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*/
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export class Mover extends Component {
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private _triggerHelper: ColliderTriggerHelper;
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public onAddedToEntity(){
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this._triggerHelper = new ColliderTriggerHelper(this.entity);
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}
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/**
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* 计算修改运动矢量的运动，以考虑移动时可能发生的碰撞
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* @param motion
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*/
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public calculateMovement(motion: Vector2){
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let collisionResult = new CollisionResult();
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if (!this.entity.getComponent(Collider) || !this._triggerHelper){
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return null;
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}
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// 移动所有的非触发碰撞器并获得最近的碰撞
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let colliders: Collider[] = 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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// 不检测触发器 在我们移动后会重新访问它
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if (collider.isTrigger)
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continue;
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// 获取我们在新位置可能发生碰撞的任何东西
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let bounds = collider.bounds;
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bounds.x += motion.x;
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bounds.y += motion.y;
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let boxcastResult = Physics.boxcastBroadphaseExcludingSelf(collider, bounds, collider.collidesWithLayers);
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bounds = boxcastResult.bounds;
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let neighbors = boxcastResult.tempHashSet;
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for (let j = 0; j < neighbors.length; j ++){
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let neighbor = neighbors[j];
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// 不检测触发器
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if (neighbor.isTrigger)
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continue;
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let _internalcollisionResult = collider.collidesWith(neighbor, motion);
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if (_internalcollisionResult){
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// 如果碰撞 则退回之前的移动量
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motion = Vector2.subtract(motion, _internalcollisionResult.minimumTranslationVector);
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// 如果我们碰到多个对象，为了简单起见，只取第一个。
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if (_internalcollisionResult.collider){
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collisionResult = _internalcollisionResult;
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}
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}
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}
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}
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ListPool.free(colliders);
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return {collisionResult: collisionResult, motion: motion};
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}
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/**
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* 将calculatemomovement应用到实体并更新triggerHelper
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* @param motion
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*/
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public applyMovement(motion: Vector2){
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// 移动实体到它的新位置，如果我们有一个碰撞，否则移动全部数量。当碰撞发生时，运动被更新
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this.entity.position = Vector2.add(this.entity.position, motion);
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// 对所有是触发器的碰撞器与所有宽相位碰撞器进行重叠检查。任何重叠都会导致触发事件。
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if (this._triggerHelper)
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this._triggerHelper.update();
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}
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/**
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* 通过调用calculateMovement和applyMovement来移动考虑碰撞的实体;
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* @param motion
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*/
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public move(motion: Vector2){
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let movementResult = this.calculateMovement(motion);
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let collisionResult = movementResult.collisionResult;
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motion = movementResult.motion;
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this.applyMovement(motion);
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return collisionResult;
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}
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}
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}
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