2.6.14 ContV sample

Function contv draw vertical cylinders (belts) at contour lines. The sample code is:

int sample(mglGraph *gr)
{
  mglData a,v(5); mgls_prepare2d(&a); v.a[0]=-0.5;
  v.a[1]=-0.15; v.a[2]=0; v.a[3]=0.15;  v.a[4]=0.5;
  gr->SubPlot(2,2,0); gr->Title("ContV plot (default)");
  gr->Rotate(50,60);  gr->Box();  gr->ContV(a);

  gr->SubPlot(2,2,1); gr->Title("manual levels");
  gr->Rotate(50,60);  gr->Box();  gr->ContV(v,a);

  gr->SubPlot(2,2,2); gr->Title("'\\_' style");
  gr->Rotate(50,60);  gr->Box();  gr->ContV(a,"_");

  gr->SubPlot(2,2,3); gr->Title("ContV and ContF");
  gr->Rotate(50,60);  gr->Box();  gr->Light(true);
  gr->ContV(a); gr->ContF(a); gr->Cont(a,"k");
  return 0;
}

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