如何在Three.js中使用ObjLoader加载对象后访问顶点

Question

我在Three.js中使用ObjLoader在我的场景中加载* .obj文件，通常代码工作没有任何问题，但如果我想要一点一点地操纵对象顶点和索引，我该怎么办呢不知道如何在加载的* .obj模型中调用顶点。

运行var vertex_x = geometry.vertices[0].x的Tryig引发异常并抱怨未定义0属性。我们将非常感谢您的指导，

var obj_geo = new THREE.OBJLoader();
obj_geo.load('new_I_Profile.obj', function(geometry){
geometry.scale.x = 2;  geometry.scale.y = 2; geometry.scale.z = 20; 
geometry.rotation.x = -Math.PI/2;
geometry.color = 0xff;

var lines = new THREE.Geometry();
lines.vertices.push(new THREE.Vector3(0, 0, 0));
lines.vertices.push(new THREE.Vector3(0, 120, 0));
var material = new THREE.LineBasicMaterial({ opacity: 1.0,  linewidth: 1, vertexColors: THREE.VertexColors });
var main_line = new THREE.Line(lines, material);
main_line.name = 'main_line';
main_line.position.x = crs_line.position.x; main_line.position.z = crs_line.position.z; 
main_line.position.y = crs_line.position.y; 
main_line.add(geometry);
editor.addObject(main_line);
});

Answer 1

OBJLoader会返回Object3D，因此您可以在代码中将 geometry 替换为 mesh ，并使用mesh.geometry访问顶点.vertices [I]