3.8.2 Vect3 sample

Function vect3 draw just usual vector field plot but at slices of 3D data. The sample code is:

int sample(mglGraph *gr)
{
  mglData ex,ey,ez; mgls_prepare3v(&ex,&ey,&ez);
  gr->SubPlot(2,1,0); gr->Title("Vect3 sample");    gr->SetOrigin(0,0,0);
  gr->Rotate(50,60);    gr->Axis("_xyz");   gr->Box();
  gr->Vect3(ex,ey,ez,"x");  gr->Vect3(ex,ey,ez);    gr->Vect3(ex,ey,ez,"z");

  gr->SubPlot(2,1,1);   gr->Title("'f' style");
  gr->Rotate(50,60);    gr->Axis("_xyz");   gr->Box();
  gr->Vect3(ex,ey,ez,"fx"); gr->Vect3(ex,ey,ez,"f");gr->Vect3(ex,ey,ez,"fz");
  gr->Grid3(ex,"Wx");   gr->Grid3(ex,"W");  gr->Grid3(ex,"Wz");
  return 0;
}