Three.js形状材质纹理显示错误

Question

我是Three.js中的新手，并且在Shape对象上使用图像纹理会出现问题。所以这是我的功能：

function addShape( shape, extrudeSettings, color, x, y, z, rx, ry, rz, s ) {

        // 3d shape
        var geometry = new THREE.ExtrudeGeometry( shape, extrudeSettings );

        //var mesh = THREE.SceneUtils.createMultiMaterialObject( geometry, [ new THREE.MeshLambertMaterial( { map: OBJECT3D.tableLegTexture, ambient: color, shading: THREE.FlatShading } ) ] );
        var mesh_mat    = new THREE.MeshLambertMaterial( { map: OBJECT3D.tableLegTexture,ambient: 0x999999 } );
        mesh        = new THREE.Mesh(geometry, mesh_mat);

        mesh.position.set( x, y, z );
        mesh.rotation.set( rx, ry, rz );
        //mesh.scale.set( s, s, s );
        group.add( mesh );
    }

function createBein(position) {

        group = new THREE.Object3D();
        group.position.y = 50;


        if (position == "right") {

            var circleRadius = 400;
            var circleShape = new THREE.Shape();
            circleShape.moveTo( 0, circleRadius );
            circleShape.quadraticCurveTo( 40, circleRadius, 40, 0 );
            circleShape.quadraticCurveTo( 40, -circleRadius, 0, -circleRadius );
            circleShape.quadraticCurveTo( -40, -circleRadius, -40, 0 );
            circleShape.quadraticCurveTo( -40, circleRadius, 0, circleRadius );

            var extrudeSettings = { amount: OBJECT3D.heightTable };
            extrudeSettings.bevelEnabled = false;
            extrudeSettings.bevelSegments = 2;
            extrudeSettings.steps = 1;

            x_pos = 0;
            y_pos = OBJECT3D.heightTable;
            z_pos = 40-Math.round(OBJECT3D.lengthTableTop/2)+300;

            rot_x = Math.PI/2;
            rot_y = 0;
            rot_z = Math.PI/2;

            var result = addShape( circleShape, extrudeSettings, 0x999999, x_pos, y_pos, z_pos, rot_x, rot_y, rot_z, 1 ); // addShape( shape, extrudeSettings, color, x, y, z, rx, ry, rz, s )

            return result;
        }

    }

在这里你可以看到结果：

tableleg的纹理应该看起来像桌面的纹理。 有谁知道如何解决这个纹理问题？