学习深度图时 globalDSManager 是什么？

Creator 3.x
#1

这个是为材质传入深度图的代码。而我放在我的项目里面就无法拿到globalDSManager。

    start() {
        let material = this.node.getComponent(MeshRenderer).sharedMaterial;
        material.setProperty(this.samplerName,this.rtCamera.targetTexture.window.framebuffer.depthStencilTexture);
        let pass0 = material.passes[0];
        let bindingIndex = pass0.getBinding(this.samplerName);
        pass0.bindSampler(bindingIndex,director.root.pipeline.globalDSManager.pointSampler);

        let handle = pass0.getHandle('nearFar');
        pass0.setUniform(handle, new Vec2(this.rtCamera.near, this.rtCamera.far));
    }

director.root.pipeline.globalDSManager.pointSampler 的globalDSManager 无法拿到？

#2

3.8.5可用，3.8.6这个globalDSManager就没了?