await scene.assets.loadAsset({
                type: 'texture',
                assetId: 'arrow_png',
                src: '',
                options: {
                    wrapU: 1,
                    wrapV: 1
                }
            });
            const arrowMat = scene.createMaterial(
                // 使用定制的效果
                scene.assets.getAsset('effect', 'standard'), {
                    u_baseColorMap: scene.assets.getAsset('texture', 'arrow_png')
                }
            );
            scene.assets.addAsset('material', "arrow-mat", arrowMat)


            const arrow = scene.createElement(xrFrameSystem.XRMesh, {
                geometry: "plane",
                material: "arrow-mat",
               
            });
            root.addChild(arrow);