78 lines
2.7 KiB
TypeScript
78 lines
2.7 KiB
TypeScript
module es {
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/**
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* SceneTransition用于从一个场景过渡到另一个场景或在一个有效果的场景中过渡
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*/
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export abstract class SceneTransition {
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private _hasPreviousSceneRender: boolean;
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/** 是否加载新场景的标志 */
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public loadsNewScene: boolean;
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/**
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* 将此用于两个部分的转换。例如，淡出会先淡出到黑色，然后当isNewSceneLoaded为true，它会淡出。
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* 对于场景过渡，isNewSceneLoaded应该在中点设置为true，这就标识一个新的场景被加载了。
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*/
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public isNewSceneLoaded: boolean;
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/** 返回新加载场景的函数 */
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protected sceneLoadAction: Function;
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/** 在loadNextScene执行时调用。这在进行场景间过渡时很有用，这样你就知道什么时候可以更多地使用相机或者重置任何实体 */
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public onScreenObscured: Function;
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/** 当转换完成执行时调用，以便可以调用其他工作，比如启动另一个转换。 */
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public onTransitionCompleted: Function;
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public get hasPreviousSceneRender(){
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if (!this._hasPreviousSceneRender){
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this._hasPreviousSceneRender = true;
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return false;
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}
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return true;
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}
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constructor(sceneLoadAction: Function) {
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this.sceneLoadAction = sceneLoadAction;
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this.loadsNewScene = sceneLoadAction != null;
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}
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public preRender() { }
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public render() {
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}
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public async onBeginTransition() {
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await this.loadNextScene();
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this.transitionComplete();
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}
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protected transitionComplete() {
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SceneManager.sceneTransition = null;
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if (this.onTransitionCompleted) {
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this.onTransitionCompleted();
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}
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}
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protected async loadNextScene() {
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if (this.onScreenObscured)
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this.onScreenObscured();
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if (!this.loadsNewScene) {
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this.isNewSceneLoaded = true;
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}
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SceneManager.scene = await this.sceneLoadAction();
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this.isNewSceneLoaded = true;
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}
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public tickEffectProgressProperty(filter: egret.CustomFilter, duration: number, easeType: Function, reverseDirection = false): Promise<boolean>{
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return new Promise((resolve)=>{
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let start = reverseDirection ? 1 : 0;
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let end = reverseDirection ? 0 : 1;
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egret.Tween.get(filter.uniforms).set({_progress: start}).to({_progress: end}, duration * 1000, easeType).call(()=>{
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resolve();
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});
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});
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}
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}
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}
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