86 lines
2.9 KiB
TypeScript
86 lines
2.9 KiB
TypeScript
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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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abstract class SceneTransition {
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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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/**
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* 如果为true
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* 会将之前的场景渲染到previousSceneRender中，这样你就可以在转换时使用它
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*/
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public wantsPreviousSceneRender: 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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/** 包含上一个场景的最后渲染。可以用来在加载新场景时模糊屏幕。 */
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public previousSceneRender: egret.RenderTexture;
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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 progress: number = 0;
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constructor(sceneLoadAction: Function, wantsPreviousSceneRender: boolean = true) {
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this.sceneLoadAction = sceneLoadAction;
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this.wantsPreviousSceneRender = wantsPreviousSceneRender;
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this.loadsNewScene = sceneLoadAction != null;
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if (wantsPreviousSceneRender)
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this.previousSceneRender = new egret.RenderTexture();
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}
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private _hasPreviousSceneRender;
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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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public preRender() { }
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public render(){
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}
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public onBeginTransition(): Promise<any> {
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return new Promise((resolve) => {
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resolve(this.loadScene());
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this.transitionComplete();
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});
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}
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protected transitionComplete() {
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SceneManager.sceneTransition = null;
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if (this.previousSceneRender){
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this.previousSceneRender.dispose();
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this.previousSceneRender = null;
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}
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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 loadScene(): Promise<any> {
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return new Promise(async (resolve) => {
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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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resolve();
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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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}
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}
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