256 lines
6.6 KiB
C
256 lines
6.6 KiB
C
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#ifndef _FUNC_MSH2VTK_H
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#define _FUNC_MSH2VTK_H
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#include "sysDefine_msh2vtk.h"
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class mshvtk
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{
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private:
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nodeArray nArray;
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elementArray eArray;
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nodeDataArray ndArray;
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elementDataArray edArray;
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typesMap msh2vtk_type;
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typesMap type_nodenum;
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typesMap::iterator itm;
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int nodenum;
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int elenum;
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strArray outNames;
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public:
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mshvtk(){
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msh2vtk_type[1] = 3;
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msh2vtk_type[2] = 5;
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msh2vtk_type[3] = 9;
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msh2vtk_type[4] = 10;
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msh2vtk_type[5] = 12;
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msh2vtk_type[6] = 13; //注意三棱柱顶点序列gmsh和vtk貌似有点区别 上下底面的三角形顶点排序刚好相反
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type_nodenum[1] = 2;
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type_nodenum[2] = 3;
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type_nodenum[3] = 4;
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type_nodenum[4] = 4;
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type_nodenum[5] = 8;
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type_nodenum[6] = 6;
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}
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~mshvtk(){}
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int runtine(char*);
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int addname(char*);
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int readmsh(char*); //注意这里的文件名都是不带.msh后缀的
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int writevtk(char*); //注意这里的文件名需要添加.vtk后缀
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};
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int mshvtk::runtine(char* parachar)
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{
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if(readmsh(parachar)) return -1;
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if(writevtk(parachar)) return -1;
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nArray.clear();
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ndArray.clear();
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eArray.clear();
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edArray.clear();
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return 0;
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}
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int mshvtk::addname(char* onename)
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{
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string s = onename;
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s = "\""+s+"\"";
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outNames.push_back(s);
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return 0;
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}
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int mshvtk::readmsh(char* inname)
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{
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int temp_int,ele_num;
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node temp_node;
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element temp_element;
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nodeData temp_node_data;
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elementData temp_element_data;
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string temp_str;
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stringstream temp_ss;
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char filename[1024];
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strcpy(filename,inname);
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strcat(filename,".msh");
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ifstream infile;
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if(open_infile(infile,filename)) return -1;
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while(getline(infile,temp_str))
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{
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if (temp_str == "$Nodes")
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{
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getline(infile,temp_str);
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temp_ss.clear(); temp_ss.str(""); temp_ss << temp_str;
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temp_ss >> nodenum;
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for (int i = 0; i < nodenum; i++)
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{
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getline(infile,temp_str);
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temp_ss.clear();
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temp_ss << temp_str;
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temp_ss >> temp_node.id >> temp_node.x >> temp_node.y >> temp_node.z;
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nArray.push_back(temp_node);
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}
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}
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else if (temp_str == "$Elements")
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{
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getline(infile,temp_str);
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temp_ss.clear(); temp_ss.str(""); temp_ss << temp_str;
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temp_ss >> ele_num;
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for (int i = 0; i < ele_num; i++)
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{
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temp_element.msh_info.clear();
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temp_element.nodes_index.clear();
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getline(infile,temp_str);
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temp_ss.clear(); temp_ss.str(""); temp_ss << temp_str;
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temp_ss >> temp_element.id >> temp_element.msh_type >> temp_element.msh_info_num;
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for (int j = 0; j < temp_element.msh_info_num; j++)
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{
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temp_ss >> temp_int;
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temp_element.msh_info.push_back(temp_int);
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}
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for (int j = 0; j < type_nodenum[temp_element.msh_type]; j++)
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{
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temp_ss >> temp_int;
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if (nArray[0].id == 1)
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{
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temp_element.nodes_index.push_back(temp_int-1);
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}
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else temp_element.nodes_index.push_back(temp_int);
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}
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temp_element.vtk_type = msh2vtk_type[temp_element.msh_type];
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eArray.push_back(temp_element);
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}
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}
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else if (temp_str == "$ElementData")
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{
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temp_element_data.ids.clear();
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temp_element_data.val.clear();
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getline(infile,temp_str);
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temp_ss.clear(); temp_ss.str(""); temp_ss << temp_str;
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temp_ss >> temp_int;
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for (int i = 0; i < temp_int; i++)
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{
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getline(infile,temp_str);
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temp_element_data.name = temp_str;
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}
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//跳过6行
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for (int i = 0; i < 6; i++)
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getline(infile,temp_str);
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temp_ss.clear(); temp_ss.str(""); temp_ss << temp_str;
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temp_ss >> temp_int;
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temp_element_data.ids.resize(temp_int);
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temp_element_data.val.resize(temp_int);
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for (int i = 0; i < temp_int; i++)
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{
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getline(infile,temp_str);
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temp_ss.clear(); temp_ss.str(""); temp_ss << temp_str;
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temp_ss >> temp_element_data.ids[i] >> temp_element_data.val[i];
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}
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edArray.push_back(temp_element_data);
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}
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else if (temp_str == "$NodeData")
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{
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temp_node_data.ids.clear();
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temp_node_data.val.clear();
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getline(infile,temp_str);
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temp_ss.clear(); temp_ss.str(""); temp_ss << temp_str;
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temp_ss >> temp_int;
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for (int i = 0; i < temp_int; i++)
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{
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getline(infile,temp_str);
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temp_node_data.name = temp_str;
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}
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//跳过6行
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for (int i = 0; i < 6; i++)
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getline(infile,temp_str);
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temp_ss.clear(); temp_ss.str(""); temp_ss << temp_str;
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temp_ss >> temp_int;
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temp_node_data.ids.resize(temp_int);
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temp_node_data.val.resize(temp_int);
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for (int i = 0; i < temp_int; i++)
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{
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getline(infile,temp_str);
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temp_ss.clear(); temp_ss.str(""); temp_ss << temp_str;
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temp_ss >> temp_node_data.ids[i] >> temp_node_data.val[i];
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}
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ndArray.push_back(temp_node_data);
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}
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}
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infile.close();
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return 0;
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}
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int mshvtk::writevtk(char* inname)
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{
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int temp_int;
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string temp_dataName;
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int totalCellNum = 0;
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char filename[1024];
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strcpy(filename,inname);
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strcat(filename,".vtk");
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ofstream outfile;
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if(open_outfile(outfile,filename)) return -1;
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outfile<<"# vtk DataFile Version 2.0"<<endl<<"Generated by msh2vtk"<<endl<<"ASCII"<<endl<<"DATASET UNSTRUCTURED_GRID"<<endl<<"POINTS "<<nArray.size()<<" FLOAT"<<endl;
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for (int i = 0; i < nArray.size(); i++)
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{
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outfile << setprecision(16) << nArray.at(i).x << " " << nArray.at(i).y << " " << nArray.at(i).z << endl;
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}
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//计算一下CELLS的总长 注意类型名算一个 所以要加1
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for (int i = 0; i < eArray.size(); i++)
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{
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totalCellNum += type_nodenum[eArray.at(i).msh_type] + 1;
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}
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outfile<<"CELLS "<<eArray.size()<<" "<<totalCellNum<<endl;
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for (int i = 0; i < eArray.size(); i++)
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{
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outfile << type_nodenum[eArray.at(i).msh_type] << " ";
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for (int j = 0; j < eArray.at(i).nodes_index.size(); j++)
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{
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outfile << eArray.at(i).nodes_index.at(j) << " ";
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}
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outfile << endl;
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}
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outfile << "CELL_TYPES " << eArray.size() << endl;
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for (int i = 0; i < eArray.size(); i++)
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{
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outfile << eArray.at(i).vtk_type << " ";
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}
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outfile << endl;
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for (int i = 0; i < ndArray.size(); i++)
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{
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for (int n = 0; n < outNames.size(); n++)
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{
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if (outNames[n] == ndArray[i].name)
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{
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temp_dataName = replace_all(ndArray[i].name," ","_",temp_int);
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outfile<<"POINT_DATA "<<ndArray[i].val.size()<<endl<<"SCALARS " << temp_dataName << " FLOAT"<<endl<<"LOOKUP_TABLE default"<<endl;
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for (int j = 0; j < ndArray[i].val.size(); j++)
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{
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outfile<<setprecision(16)<<ndArray[i].val[j]<<endl;
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}
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}
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}
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}
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for (int i = 0; i < edArray.size(); i++)
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{
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for (int n = 0; n < outNames.size(); n++)
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{
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if (outNames[n] == edArray[i].name)
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{
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temp_dataName = replace_all(edArray[i].name," ","_",temp_int);
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outfile<<"CELL_DATA "<<edArray[i].val.size()<<endl<<"SCALARS " << temp_dataName << " FLOAT"<<endl<<"LOOKUP_TABLE default"<<endl;
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for (int j = 0; j < edArray[i].val.size(); j++)
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{
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outfile<<setprecision(16)<<edArray[i].val[j]<<endl;
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}
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}
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}
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}
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outfile.close();
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return 0;
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}
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#endif
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