[英]Error writing binary VTK files
我正在尝试编写一个基本的二进制VTK文件,以使用ParaView显示一些数据,但出现一些错误,我不明白为什么。 这是我在C ++中的测试代码:
#include <iostream>
#include <fstream>
double myarray[72] = {
0,0,0,1,0,0,2,0,0,3,0,0,4,0,0,
5,0,0,0,1,0,1,1,0,2,1,0,3,1,0,
4,1,0,5,1,0,0,2,0,1,2,0,2,2,0,
3,2,0,4,2,0,5,2,0,0,3,0,1,3,0,
2,3,0,3,3,0,4,3,0,5,3,0};
int main()
{
std::ofstream vtkstream("test01.vtk", std::ios::out | std::ios::trunc);
bool ascii = false;
if (vtkstream) {
vtkstream<<"# vtk DataFile Version 2.0"<<"\n";
vtkstream<<"Exemple"<<"\n";
if (ascii) {
vtkstream<<"ASCII"<<"\n";
vtkstream.close();
vtkstream.clear();
vtkstream.open("test01.vtk", std::ios::out | std::ios::app);
vtkstream<<"DATASET STRUCTURED_GRID"<<std::endl;
vtkstream<<"DIMENSIONS 6 4 1"<<std::endl;
vtkstream<<"POINTS 24 double"<<std::endl;
for (unsigned int i = 0; i < 72; ++i) {
vtkstream<<myarray[i]<<" ";
}
} else {
vtkstream<<"BINARY"<<"\n";
vtkstream.close();
vtkstream.clear();
vtkstream.open("test01.vtk", std::ios::out | std::ios::app | std::ios::binary);
vtkstream<<"DATASET STRUCTURED_GRID"<<std::endl;
vtkstream<<"DIMENSIONS 6 4 1"<<std::endl;
vtkstream<<"POINTS 24 double"<<std::endl;
for (unsigned int i = 0; i < 72; ++i) {
vtkstream<<myarray[i];
}
}
vtkstream.close();
} else {
std::cout<<"ERROR"<<std::endl;
}
return 0;
}
ASCII文件格式可以完美运行,但是二进制版本在ParaView中产生以下错误:
一般警告:在........ \\ src \\ VTK \\ IO \\ vtkDataReader.cxx中,行1363读取二进制数据时出错!
VTK格式的错误在哪里?
我的50美分。 这是最终对我有用的代码。 使用字节交换,并使用函数write
跳过<<
操作符的格式
#include <iostream>
#include <fstream>
// Thanks to https://stackoverflow.com/questions/105252
template <typename T>
void SwapEnd(T& var)
{
char* varArray = reinterpret_cast<char*>(&var);
for(long i = 0; i < static_cast<long>(sizeof(var)/2); i++)
std::swap(varArray[sizeof(var) - 1 - i],varArray[i]);
}
double myarray[72] = {
0.001,0.002,0,1,0,0,2,0,0,3,0,0,4,0,0,
5,0,0,0,1,0,1,1,0,2,1,0,3,1,0,
4,1,0,5,1,0,0,2,0,1,2,0,2,2,0,
3,2,0,4,2,0,5,2,0,0,3,0,1,3,0,
2,3,0,3,3,0,4,3,0,5,3,0};
int main()
{
std::ofstream vtkstream;
vtkstream.open("test.vtk", std::ios::out | std::ios::app | std::ios::binary);
if (vtkstream) {
vtkstream<<"# vtk DataFile Version 2.0"<<"\n";
vtkstream<<"Exemple"<<"\n";
vtkstream<<"BINARY"<<"\n";
vtkstream<<"DATASET STRUCTURED_GRID"<<std::endl;
vtkstream<<"DIMENSIONS 6 4 1"<<std::endl;
vtkstream<<"POINTS 24 double"<<std::endl;
for (unsigned int i = 0; i < 72; ++i) {
SwapEnd(myarray[i]);
vtkstream.write((char*)&myarray[i], sizeof(double));
}
vtkstream.close();
} else {
std::cout<<"ERROR"<<std::endl;
}
return 0;
}
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