世界座标系 > 屏幕座标系
double worldCoord[3] = {100, 100, 20};
vtkSmartPointer<vtkCoordinate> pCoorPress = vtkSmartPointer<vtkCoordinate>::New();
pCoorPress->SetCoordinateSystemToWorld();
pCoorPress->SetValue(worldCoord);
int *dispCoord = pCoorPress->GetComputedDisplayValue(m_Render1);
qDebug() << dispCoord[0] << dispCoord[1];
屏幕座标系 > 世界座标系
double dispCoord[2] = {100, 100};
vtkSmartPointer<vtkCoordinate> pCoorPress = vtkSmartPointer<vtkCoordinate>::New();
pCoorPress->SetCoordinateSystemToDisplay();
pCoorPress->SetValue(dispCoord);
double *worldCoord = pCoorPress->GetComputedWorldValue(m_Render1);
qDebug() << worldCoord[0] << worldCoord[1] << worldCoord[2];
以上代码一定要在窗口show出来以后调用,不能在初始化时进行