_DimOrdinate: negative values?


how to get negative values for _DimOrdinate dimensions with negative x (x<0) and y (y<0)?



you can select those and add a “-” in the properties panel:

Hi Diego,

thank you, and I know. I don’t like to do this manually. :wink:



Hi Michael - I am checking on this with the drafting experts here. I am pretty sure that is not a thing you can do now in Rhino, but it may be a perfectly legitimate wish item =)


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_EvaluatePt yields negative values

As I recall, Ordinate or Datum dimension standards do not allow negative values.

Yes, this is my understand, as well.
Ordinate dimension display the absolute value along the x or y axis.

Here is AutoCAD’s ordinate dimensioning. It follows this rule, as well.

If you want the negative, you can work around this limitation by adding a “-” prefix to the dimension in the annotation style. Assign all the negative ordinate dims you want to style.

Or apply as an object override by adding a “-” before the <> in the Dimension properties of one or more selected dimensions.

Mary Ann Fugier
McNeel Technical Support and Training

Or place your Datum point below and to the left of your part.

Hi all,

thank you for your ideas. What I don’t want is to define positives or negatives manually.

Perhaps I should go another way with a script. I will see.