Bricscad COM API and python win32com

Akim Zimnitsky

Hello. I'm trying to connect to Bricscad COM API using python win32com. Try adding the line causing the error.

[code]

import win32com.client

acad = win32com.client.Dispatch("BricscadApp.AcadApplication") doc = acad.ActiveDocument model = doc.ModelSpace paper = doc.PaperSpace util = doc.Utility blocks = doc.Blocks print acad, doc,model,paper, util,blocks sCurName = doc.Name # it works print sCurName line = model.AddLine((0,0),(0,10)) # An error occurs

[/code]

Akim Zimnitsky

import win32com.client

acad = win32com.client.Dispatch("BricscadApp.AcadApplication")

doc = acad.ActiveDocument

model = doc.ModelSpace

paper = doc.PaperSpace

util = doc.Utility

blocks = doc.Blocks

print acad, doc,model,paper, util,blocks

sCurName = doc.Name

print sCurName

line = model.AddLine((0,0),(0,10))

Its_Alive

Could it be that :
model.AddLine((0,0),(0,10))
is looking for a 3d point?
model.AddLine((0,0,0),(0,10,0))

Akim Zimnitsky

 line = model.AddLine((0,0,0),(0,10,0)) # cause error

 line = model.AddLine("0,0,0","0,10,0") # it works

It's weird. In the developer's guide startpoint and endpoint is arraylike variables. In other programs such as Nanocad this code works correctly

util.GetPoint() return arraylike variable

Akim Zimnitsky

The problem was with the type of the array. Bricscad requires an array type VT_ARRAY | VT_R8. Python lists do not match this type. This problem is solved with the creation of the array of the appropriate type in python by the command array('d', >).win32com replaced by comtypes library.

from array import array

import comtypes.client

acad = comtypes.client.GetActiveObject("BricscadApp.AcadApplication")

doc = acad.ActiveDocument

model = doc.ModelSpace

paper = doc.PaperSpace

util = doc.Utility

blocks = doc.Blocks

print acad, doc,model,paper, util,blocks

sCurName = doc.Name

print sCurName

pnt1 = array('d',(0,0,0))

pnt2 = array('d',(0,10,0))

line = model.AddLine(pnt1,pnt2)

Kevin Simmons

Hello all,

How do you implement your code in Bricscad?  I have been working strictly in  Lisp thus far, and have some Python experience and love the language.  Sounds interesting.

Akim Zimnitsky

 I connect to Bricscad COM API using comtypes library. I run the script from the outside.

Kevin Simmons

I get this error when trying to access Bricscad from the Python Shell.  I have imported comtypes.client and I have Bricscad running.

>>> acad=comtypes.client.GetActiveObject("BricscadApp.AcadApplication")
Traceback (most recent call last):
  File "", line 1, in
    acad=comtypes.client.GetActiveObject("BricscadApp.AcadApplication")
  File "C:\Python34\lib\site-packages\comtypes\client\__init__.py", line 180, in GetActiveObject
    obj = comtypes.GetActiveObject(clsid, interface=interface)
  File "C:\Python34\lib\site-packages\comtypes\__init__.py", line 1238, in GetActiveObject
    oledll.oleaut32.GetActiveObject(byref(clsid), None, byref(p))
  File "_ctypes/callproc.c", line 920, in GetResult
OSError: [WinError -2147221021] Operation unavailable
>>>

Any ideas on what will cause this error?

Thanks,

Kevin

Akim Zimnitsky

@Kevin Simmons:

I get this error when trying to access Bricscad from the Python Shell.  I have imported comtypes.client and I have Bricscad running.

>>> acad=comtypes.client.GetActiveObject("BricscadApp.AcadApplication")
Traceback (most recent call last):
  File " ", line 1, in
    acad=comtypes.client.GetActiveObject("BricscadApp.AcadApplication")
  File "C:\Python34\lib\site-packages\comtypes\client\__init__.py", line 180, in GetActiveObject
    obj = comtypes.GetActiveObject(clsid, interface=interface)
  File "C:\Python34\lib\site-packages\comtypes\__init__.py", line 1238, in GetActiveObject
    oledll.oleaut32.GetActiveObject(byref(clsid), None, byref(p))
  File "_ctypes/callproc.c", line 920, in GetResult
OSError: [WinError -2147221021] Operation unavailable
>>>

Any ideas on what will cause this error?

Thanks,

Kevin

Perhaps you're trying to connect to a 64 bit version of Bricscad. For this you need a 64 bit version comtypes and python

Kevin Simmons

Thanks Akim,  I was running a 32 bit version of Bricscad.  Re-installed it as 64 bit and it works.  Thanks for the advise.