javascript - 未捕获的TypeError：无法读取未定义的属性'ModelBufferGeometry'(Uncaught TypeError: Cannot read property 'ModelBufferGeometry' of undefined)

Question

I am new to three.js(10 days) and I'm trying to replicate this codepen project:

(我是three.js（10天）的新手，我正在尝试复制此Codepen项目：)

https://codepen.io/zadvorsky/pen/PNXbGo

(https://codepen.io/zadvorsky/pen/PNXbGo)

but I get this error :

(但我得到这个错误：)

script.js:140 Uncaught TypeError: Cannot read property 'ModelBufferGeometry' of undefined

(script.js：140未捕获的TypeError：无法读取未定义的属性“ ModelBufferGeometry”)

                  function SlideGeometry(model) {
                    THREE.BAS.ModelBuffergeometry.call(this, model);
                  }

                  SlideGeometry.prototype = Object.create(THREE.BAS.ModelBufferGeometry.prototype); 
                  SlideGeometry.prototype.constructor = SlideGeometry;
                  SlideGeometry.prototype.bufferPositions = function() {
                  var positionBuffer = this.createAttribute('position', 3).array;

                  for (var i = 0; i < this.faceCount; i++) {
                     var face = this.ModelGeometry.faces[i];
                     var centroid = THREE.BAS.Utils.computeCentroid(this.modelGeometry, face);

                     var a = this.modelgeometry.vertices[faces.a];
                     var b = this.modelgeometry.vertices[faces.b];
                     var c = this.modelgeometry.vertices[faces.c];


                    positionBuffer[face.a * 3] = a.x - centroid.x;
                    positionBuffer[face.a * 3 + 1] = a.y - centroid.y;
                    positionBuffer[face.a * 3 + 2] = a.z - centroid.z;

                    positionBuffer[face.b * 3] = b.x - centroid.x;
                    positionBuffer[face.b * 3 + 1] = b.y - centroid.y;
                    positionBuffer[face.b * 3 + 2] = b.z - centroid.z;

                    positionBuffer[face.c * 3] = c.x - centroid.x;
                    positionBuffer[face.c * 3 + 1] = c.y - centroid.y;
                    positionBuffer[face.c * 3 + 2] = c.z - centroid.z;
                    }
                   };

what am I doing wrong?

(我究竟做错了什么？)

Can someone explain me?

(有人可以解释我吗？)

ps: this is my codepen:

(ps：这是我的codepen：)

https://codepen.io/MedicM91/pen/LYEPErG

(https://codepen.io/MedicM91/pen/LYEPErG)

  ask by MarioM91 translate from so

Answer 1

等待大神答复