Converting decimal feet to fractional feet and inches

Revit
1

Hello all,

new user here and I was wondering if I could get some help on a particular issue.

I am trying to have dynamo convert a decimal feet number to fraction feet and inches. the converted dimension should be formatted like xx’-yy". the idea is to then push this “converted” dimension back into Revit. also i need to have the precision of the “converted” dimension set at the nearest 1/2".

for example, I need to go from
4.56’ to 4’-6 3/4" (need to keep the “dash” as part of the dimension)

I did a search but have had no luck and unfortunately my programming skills are severely lacking.

any help would be appreciated.

2

You could try something like rounding your number to the nearest 1/2" (in decimal format) first. Then convert the decimal to inches, round that down to an integer, take the difference, and convert that to fractional inches.

Springs has a node that already does this to the nearest inch. You could use that as a guide as well.

3

Hi, I just made a custom node to do it, it should work but you might get a string as an output, I’m not expert in imperial numbers.

InchesFractional1
InchesFractional1.png854×440 24.6 KB

InchesFractional2
InchesFractional2.png3664×848 161 KB

Round is at 1/4, but can easily fixed at 1/2, I was not sure what you needed.

FractionalInchesConverter.dyn (2.2 KB)

4

@vincitygialam Here a better version, where you can pick your denominator (1/2, 1/4, 1/8…). Is it what you needed?

InchesFractional3
InchesFractional3.png4166×1932 364 KB

FractionalInchesConverter.dyn (18.0 KB)

1 Like
5

Nice work, but I was not able to get that to work quickly, but I found (edit) “spring nodes” package has a node called Feet.ToFraction that works well. However you can not specify the precision, I assume it uses the project units precision.

1 Like
6

Any progress on this one? The spring node would be perfect if it weren’t for 256th precision.

7

many years late to the game but something like this is what you are looking for. In this line - round(aVSFParamVal, 3) the 3 stands for decimal places.


doc = DocumentManager.Instance.CurrentDBDocument
activeView = doc.ActiveView

activeStrucFrame = FilteredElementCollector(doc,activeView.Id).OfCategory(BuiltInCategory.OST_StructuralFraming).WhereElementIsNotElementType().ToElements()

result = []

def GetStringFromNumber(document,number, unitType):
    return UnitFormatUtils.Format(doc.GetUnits(), unitType, number, True, False)

for aVSF in activeStrucFrame:
	try:
		aVSFParamVal = aVSF.get_Parameter(BuiltInParameter.INSTANCE_LENGTH_PARAM).AsDouble()
		TransactionManager.Instance.EnsureInTransaction(doc)
		aVSFPVRound = round(aVSFParamVal, 3)
		reconvertedToFtIn = GetStringFromNumber(doc, aVSFPVRound, UnitType.UT_Length)
		pV = "L" + str(reconvertedToFtIn)
		aVSF.LookupParameter("Prefab ID").Set(pV)
		TransactionManager.Instance.TransactionTaskDone()
	except:
		message = traceback.format_exc()
		result.Add(message)
			


OUT = "Success"