呼喚「FaceNormalsHelper」的結果「類型錯誤：this.update不是一個函數」

Question

我想打電話給FaceNormalsHelper從文件 three.js/src/extras/helpers/FaceNormalsHelper.js但它似乎產生一個錯誤：

TypeError: this.update is not a function 
this.update(); 

錯誤發生在上述文件的第32行。 這是我做的調用（看最後一行）：

var mesher = function mesher (aGeometry, position, color, name, woodTexture, debug) { 
     var texture, 
      material, 
      mesh; 

     if (woodTexture) { 
      texture = THREE.ImageUtils.loadTexture('crate.gif'); 
      texture.anisotropy = makeRenderer.renderer.getMaxAnisotropy(); 
      material = new THREE.MeshBasicMaterial({ map: texture }); 
     } else { 
      material = new THREE.MeshBasicMaterial({ color: color, wireframe: true, side: THREE.DoubleSide }); 
     } 
     mesh = new THREE.Mesh(aGeometry, material); 
     if (debug) { 
      var normals = THREE.FaceNormalsHelper(mesh); 
      console.log("normals: ", normals); 
     } 
     mesh.position.set = position; 
     mesh.name = name; 
     mesh.callback = function() { makeDOMelements.info.innerHTML = name; }; 
     makeScene.scene.add(mesh); 

    }; 
    Object.freeze(mesher); 
    return mesher; 
} 

mesher(myBox3, new THREE.Vector3(0, 0, 0), 0x3bf5de, "my test Box3", true, true); 

Answer 1

你忘new：

var normals = new THREE.FaceNormalsHelper(mesh);