60 lines
1.8 KiB
TypeScript
60 lines
1.8 KiB
TypeScript
const { ccclass, property } = cc._decorator;
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@ccclass
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export default class GrayEffectScene extends cc.Component {
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private _grayLevelSlider: cc.Slider = null;
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private _grayLevelSliderLabel: cc.Label = null;
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private _examplesParentNode: cc.Node = null;
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onLoad() {
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this._grayLevelSlider = cc.find("Canvas/Content/Sliders/GrayLevelSlider/Slider").getComponent(cc.Slider);
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this._grayLevelSliderLabel = cc.find("Canvas/Content/Sliders/GrayLevelSlider/ValueLabel").getComponent(cc.Label);
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this._examplesParentNode = cc.find("Canvas/Content/Examples");
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}
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onEnable() {
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this._grayLevelSlider.node.on("slide", this._onSliderChanged, this);
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}
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onDisable() {
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this._grayLevelSlider.node.off("slide", this._onSliderChanged, this);
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}
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start() {
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this._onSliderChanged();
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}
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private _onSliderChanged() {
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this._grayLevelSliderLabel.string = `${this._grayLevelSlider.progress.toFixed(2)}`;
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// 更新材质
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this._updateRenderComponentMaterial({
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grayLevel: this._grayLevelSlider.progress
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});
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}
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/**
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* 更新渲染组件的材质
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*
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* 1. 获取材质
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* 2. 给材质的 unitform 变量赋值
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* 3. 重新将材质赋值回去
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*/
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private _updateRenderComponentMaterial(param: {
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/**
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* 灰化程度 [0.0, 1.0] ，1.0 表示完全灰化
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*/
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grayLevel: number;
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}) {
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this._examplesParentNode.children.forEach(childNode => {
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childNode.getComponents(cc.RenderComponent).forEach(renderComponent => {
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let material: cc.Material = renderComponent.getMaterial(0);
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material.setProperty("grayLevel", param.grayLevel);
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renderComponent.setMaterial(0, material);
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});
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});
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}
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}
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