const { ccclass, property } = cc._decorator;


@ccclass
export default class ShaderParamComponent extends cc.Component {

    private sprite: cc.Sprite = null;

    private _material: cc.Material = null;

    private _start = 0;

    @property({ displayName: "速度" })
    private speed: number = 1;

    onLoad() {
        this.sprite = this.getComponent(cc.Sprite);
        if (this.sprite) {
            this._material = this.sprite.getMaterial(0);
        }
        this.initParams()
    }

    private initParams() {
        if (this.sprite && this._material && this.speed) {
            this._material.setProperty("speed", this.speed)
        }
    }

    protected update(dt) {

        // if (this.sprite) {
        //     this._material = this.sprite.getMaterial(0);
        // }
        if (this.node.active && this._material) {
            if (this._material.getProperty("time", 0) != undefined) {
                this._material.setProperty('time', this._start);
                this._start += dt;
            }
        }
    }

}