get_Geometry function

Developers
1

I couldn’t find “get_Geometry” method in revitapidocs. But it is functioning in python. From where those codes coming from. Please help.

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@shibujoseukken , hi

Dynamo is not pure python, espacily the “get_…” is from C#…

KR

Andreas

check out! :slight_smile:

3

Is there any alternative for get_ functions?

4

@shibujoseukken ,

in which context? python, dynamo, designscript ?

5

python which we can use in Dynamo or where i can find get_ based functions? It is not available in revitapidocs.com.

6

Hi @shibujoseukken.
As I know get_Geometry is a method of Revit Python Wrapper.

    def get_element(self, wrapped=True):
        """ Element of Reference """
        element = self.doc.GetElement(self.id)
        return element if not wrapped else Element(element)

    def get_geometry(self):
        """ GeometryObject from Reference """
        ref = self._revit_object
        return self.doc.GetElement(ref).GetGeometryObjectFromReference(ref)

https://revitpythonwrapper.readthedocs.io/en/latest/db/reference.html?highlight=get_Geometry

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7

Hello,
The methods prefixed by a lowercase get_ are automatically generated getter methods (properties).
.NET properties are backed by a pair of .NET methods for reading and writing the property.
The C# compiler automatically names them as get_<PropertyName> and set_<PropertyName>

So, in Python (with .Net), a property that has a parameter can be written like this (2 ways)

opt = Options()
geo_set = element.get_Geometry(opt)
## OR 
opt = Options()
geo_set = element.Geometry[opt]
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The overloaded methods are also viewable if you open the RevitAPI.dll in VS :slight_smile:

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9

as per revitapidocs, the function name is GeometryElement. But in the example, they eliminated ‘Element’. How do we know whether we need to eliminate it or not.

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10

GeometryElement is the type of the return value (Geometry property)

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11

The property is called Geometry, so that’s what we use when calling it. What that property stores, and what we retrive by using the get_ prefix, is a GeometryElement.
This is a bit more obvious in the C# example lower down on that page. Specifically this line:
Autodesk.Revit.DB.GeometryElement geomElem = beam.get_Geometry(options);

In C# you have to declare what type of object you are going to assign to a variable, whereas in Python, this is handled for us automatically.
As a result, we can think of that line of code in two steps:

  1. Autodesk.Revit.DB.GeometryElement geomElem
    We tell the computer that the variable geomElem is going to be a GeometryElement. If we try to assign it a different object type - string, integer, ElementId, etc. - it will throw an error.
  2. geomElem = beam.get_Geometry(options);
    We assign our variable geomElem the value stored in the beam object’s Geometry property, which is a GeometryElement.

Generally speaking, if you see get in the syntax section of a property like we do here, you can retrieve what that property stores by putting .get_ in front of the name of that property - in our case Geometry.

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You were too fast for me haha

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