 | | | avoiding using get value with python | avoiding using get value with python 2005-03-17 - By Jerry Gamache
Back
XSI sometimes return objects with an incorrectly set (as per PythonWin
standards) multi-dispatch interface.
The way to work around that is to re-wrap the object in a dynamic dispatch.
This allows you to skip the Application.GetValue:
def dispFix( badDispatch ):
import win32com.client.dynamic
# Re-Wraps a bad dispatch into a working one:
return win32com.client.dynamic.Dispatch(badDispatch)
# Let's see if this works:
Application.CreatePrim("Sphere", "MeshSurface", "", "")
Application.ApplyHairOp("sphere", "")
oHair = Application.GetValue("hair").ActivePrimitive.ConstructionHistory.Find(
"HairGenOp")
try:
Application.LogMessage(oHair.Parameters['EmitterMeshSubdlevel'].Value)
except:
Application.LogMessage("Incorrect dispatch pointer")
oHair = dispFix(oHair)
Application.LogMessage(oHair.Parameters['EmitterMeshSubdlevel'].Value)
# or, as a single long line:
dispFix(Application.GetValue("hair")
.ActivePrimitive.ConstructionHistory
.Find("HairGenOp")
).Parameters['EmitterMeshSubdlevel'].Value = 1
If that really really annoys you and you don't want to dispFix at all, there is
a way to make sure everything works, but you need to modify a Python file to
always return dynamic dispatches:
Change %PYTHONPATH%\Lib\site-packages\win32com\client\__init__.py
Look for the function called __WrapDispatch
And comment all lines except the last one that begins with "return dynamic
.Dispatch( ... "
Of course it is always a good idea to backup files you are about to modify.
-- --Original Message-- --
From: owner-xsi@(protected) [mailto:owner-xsi@(protected)]On Behalf
Of kim@(protected)
Posted At: Thursday, March 17, 2005 12:07 PM
Posted To: xsi
Conversation: avoiding using get value with python
Subject: Re: avoiding using get value with python
Check out Brad Gabe's excelent article 'Looping Lizards' at www.cg-soup.com
for fast and efficient ways to get objects using the OM.
softimage@(protected) writes:
> You may use Application.dictionary.getobject()
>
> You may also iterate the ConstructionHistory and check each operators
> individually. The docs have a good example about this. Once you have found the
> operator you can simly access its parameters:
> iValue = oOperator.parameters( 'EmitterMeshSubdlevel' ).value
>
>
> Cheers
> Bernard
>
>
> Quoting benp <benp@(protected)>:
>
>> hello xsiList!
>> I haven't tried to get operator objects before, so this may be a larger
>> problem than just using GetValue ...
>> in python and with a hair object selected:
>> oTo = Application.Selection(0)
>>
> Application.GetValue(oTo.ActivePrimitive.ConstructionHistory.Find("hairGenOp"
)).Parameters("EmitterMeshSubdlevel").Value
>> = 0
>>
>> how can i avoid using GetValue to get the hairGenOp object properly?
>> I often find i can't get objects without using GetValue.
>>
>> thanks list.
>>
>>
>> ---
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>>
>
>
>
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