Question

使用产品：supermap-iobjectsdotnet-10.1.0

操作系统：win10 x64

调用重新计算法线方法对SuperMap.Data.Model对象进行法线计算，打断点的这一行，程序报错。

Answer 1

您好，

请截全您的代码片段，无法确定 skeleton 变量是如何进行赋值的，初步判断是源数据传入的不正确，请尝试将源数据集写死为已存在的在桌面端新建的模型数据集，查看该方法是否有效。

查看到您使用的是 10i 版本的组件产品，该版本产品在9月30日之后全面停止支持，请尽快升级，参考生命周期公告： https://www.supermap.com/support/#/productlifecycle

Comments

                    Skeleton skeleton = new Skeleton();
                    skeleton.Name = geometryid + "_skeleton";
                    double[] doublevertice = new double[vertice.Count];
                    for (int i = 0; i < vertice.Count; i++)
                        doublevertice[i] = (double)(vertice[i] * m_scale);

                    skeleton.SetVertices(doublevertice);
                    skeleton.VertexIndexes = indexes.ToArray();

                    List<float> normalsArray = new List<float>();
                    for (int i = 0; i < indexes.Count; i++)
                    {
                        SuperMap.Data.Point3D p = normalslist[indexes[i]];
                        normalsArray.Add((float)p.X);
                        normalsArray.Add((float)p.Y);
                        normalsArray.Add((float)p.Z);
                    }
                    skeleton.Normals = normalsArray.ToArray();

                    //材质
                    var matParams = m_materialsList[materialid];
                    string guid = "mtl_" + Guid.NewGuid().ToString();
                    Material3D material3D = new Material3D();
                    material3D.Name = geometryid + "_mtl"; ;
                    material3D.Name = guid;

                    if (matParams.TextureName != "")
                    {
                        TextureData texturedata = new TextureData();
                        texturedata.Name = "tex_" + Guid.NewGuid().ToString();
                        texturedata.FromFile(matParams.TextureName);

                        List<float> uvCoor = new List<float>();
                        for (int i = 0; i < indexes.Count; i++)
                        {
                            SuperMap.Data.Point2D p = uvslist[indexes[i]];
                            uvCoor.Add((float)p.X);
                            uvCoor.Add((float)p.Y);
                        }

                        List<float[]> textureCoords = new List<float[]>();
                        textureCoords.Add(uvCoor.ToArray());
                        skeleton.TextureCoords = textureCoords;

                        int[] TextureIndexes = new int[indexes.Count];
                        for (int i = 0; i < indexes.Count; i++)
                        {
                            TextureIndexes[i] = i;
                        }
                        skeleton.TextureIndexes = TextureIndexes;
                        material3D.Texture = texturedata;
                    }
                    else
                    {
                        material3D.MaterialColor = System.Drawing.Color.FromArgb(Convert.ToInt32(matParams.Alpha * 255), Convert.ToInt32(matParams.Red * 255),
                        Convert.ToInt32(matParams.Green * 255), Convert.ToInt32(matParams.Blue * 255));
                    }
                    skeleton.Material = material3D;

                    Model model = new Model();
                    model.Add(skeleton);

                    //重新计算法线和移除重复点顺序调换之后，生成数据集的数据量变大了
                    Model ReComputeNormalModel = new Model();
                    bool f = ModelBuilder3D.ReComputeNormal(model, ReComputeNormalModel, NormalComputeMode.AngleWeight, 0);

                    Model RemoveDuplicateVertex = new Model();
                    int vertexcount = ModelBuilder3D.RemoveDuplicateVertex2(ReComputeNormalModel, RemoveDuplicateVertex);

                    int skeletoncount = RemoveDuplicateVertex.GetSkeletonCount(-1);
                    for (int i = 0; i < skeletoncount; i++)
                    {
                        SkeletonID id = new SkeletonID(-1, i);
                        double[] matrix = null;
                        Skeleton sk = RemoveDuplicateVertex.GetSkeleton(id, ref matrix);
                        sk.Name = geometryid + "_skeleton";
                        m_dicSkeleton3D.Add(geometryid, sk);
                    }

我这个代码是2021年写的，当时一直没问题，最近一年没用了，什么都没改过，就出bug了

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我把这4行代码注释掉就能正常使用，但是法线有问题。。。。。

Model ReComputeNormalModel = new Model();
bool f = ModelBuilder3D.ReComputeNormal(model, ReComputeNormalModel, NormalComputeMode.AngleWeight, 0);
Model RemoveDuplicateVertex = new Model();
int vertexcount = ModelBuilder3D.RemoveDuplicateVertex2(ReComputeNormalModel, RemoveDuplicateVertex);

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您好，

请尝试先移除重复顶点再重新计算法线，确保法线计算基于最终的顶点结构，避免索引错乱。如果修改后运行仍有问题，请附上报错详细截图。

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先移除重复顶点再重新计算法线，无法生成数据集，最终保存的数据集里面没有数据记录，程序运行的时候一直报错，请看图