team1_nc/assets/script/game/game/LogoShader.ts

const { ccclass, property } = cc._decorator;

@ccclass
export default class LogoShader extends cc.Component {

    @property({type: cc.Sprite})
    private sp: cc.Sprite = null;

    private mat_logo: cc.MaterialVariant = null;
    private time: number = 0;
    
    onLoad(){
        this.mat_logo = this.sp.getMaterial(0);
        this.time = this.mat_logo.getProperty('sys_time', 0);
    }

    update(dt)
    {
        this.time += 0.02;
        let t = this.mat_logo.getProperty('sys_time', 0);
        this.mat_logo.setProperty('sys_time', this.time);
        if(this.time>= 4)
        {
            this.time = 0;
        }
    }
}