学步园

 public TriMesh CreateTIN(ILayer tinLayer)
        {
            
            ITinLayer pTinLayer = (ITinLayer)tinLayer;
           
            ITin pTinEdit = pTinLayer.Dataset;

            ITinAdvanced pTinAdv = pTin as ITinAdvanced;
            if (pTinAdv == null)
            {
                return null;
            }

            TriMesh trimesh = new TriMesh();

            for (int i = 1; i <= pTinAdv.DataTriangleCount; i++)
            {
                ITinTriangle pTinTri = pTinAdv.GetTriangle(i);//triangle的index是从1开始的

                ITinNode n0 = pTinTri.get_Node(0);
                ITinNode n1 = pTinTri.get_Node(1);
                ITinNode n2 = pTinTri.get_Node(2);

                trimesh.AddTriangle(n0.X, n0.Y, n0.Z, n1.X, n1.Y, n1.Z, n2.X, n2.Y, n2.Z);
            }
           
            return trimesh;//返回自定义的三角网数据类型
        }