AIS_Dimension & Relation

Anonymous's picture
Anonymous (not verified)
Tue, 06/25/2002 - 16:34
Forums: 
Other usage issues

Hi,
Can someone please help me to understand exactly how the AIS_Dimension and Relation is used to display the dimensions of objects. I have tried by the documentation but am unsuccessful yet in displaying dimensions.
Some example code will be more helpful.
Please help.

N. Sharjith

Yuriy Sernivka's picture
Yuriy Sernivka
Sat, 06/13/2020 - 20:42

This is almost 18 y.o. question ( it's almost allowed to buy the alcohol drinks :) ), but it still remains unanswered. As was looking for the same code sample too and have just found something on GitHub. So I leave the answer here. Maybe it will help someone else.

  Handle(AIS_Dimension) aDim;
  if (myIsDiameterDimension)
  {
    aDim = new AIS_DiameterDimension (aCircle);
    Handle(AIS_DiameterDimension)::DownCast(aDim)->SetFlyout (aDimDlg->GetFlyout());
  }
  else
  {
    aDim = new AIS_RadiusDimension (aCircle);
    Handle(AIS_RadiusDimension)::DownCast(aDim)->SetFlyout (aDimDlg->GetFlyout());
  }

  Handle(Prs3d_DimensionAspect) anAspect = new Prs3d_DimensionAspect();
  anAspect->MakeArrows3d (Standard_False);
  anAspect->MakeText3d (/* Text goes here */);
  anAspect->TextAspect()->SetHeight (/* Font height goes here */);
  anAspect->MakeTextShaded (/* Shall we select text? */);
  anAspect->SetCommonColor (/* Color? */);
  anAspect->MakeUnitsDisplayed (/* Display Units? */);
  if (/* Display Units? */)
  {
    aDim->SetDisplayUnits (/* Which Units? */);
  }

  aDim->SetDimensionAspect (anAspect);

  // Display dimension in the neutral point
  myAISContext->Display (aDim, Standard_True);

Source: https://github.com/twisted-pair/opencascade/blob/c997ced70a345ad3871cb959cd2ae5a4c28e0b0e/samples/mfc/standard/Common/RadiusParamsPage.cpp#L99

-Yuriy