Add the ability to convert a ghpython script into a stand-alone grasshopper component

http://www.grasshopper3d.com/forum/topics/gh-python-component-why-the

http://python.rhino3d.com/threads/1028-rs.AddText-gives-Runtime-error-(MissingMemberException)

If grasshopper does not have support for the text that this script is supposed to generate, then it may make sense to provide more descriptive exceptions. Maybe something like
"Text objects are not supported grasshopper, so this python script can not create them"
Of course if text objects are supported, then we just need to fix the function.

A small change that I think would improve presentation and reduce confusion for new users.

Modify some explanations based on this:
http://www.grasshopper3d.com/forum/topics/this-call-is-not-supported-from-within-a-grasshopper-component?xg_source=msg_forum_cat

I added a wish on the Grasshopper forum asking if one could "collapse" or "close" all the functions and classes within a script : http://www.grasshopper3d.com/forum/topics/grasshopper-python-script-editor-keyboard-shortcuts?commentId=2985220%3AComment%3A682276

clustering multiple component fails temporarily but then works again after opening the file again.
this behavior is observed in Grasshopper 0.8.63

http://www.grasshopper3d.com/forum/topics/python-cluster

Unindenting (by Shift-Tab) works a little strange. I have to highlight the section then it works, but the highlighted region stays the same. It would be nice if you could just unindent from the beginning of the line.

http://python.rhino3d.com/threads/890-Feature-requests-Rhino-python-editor

remove automatically-added IDs
to help Python development

rs.TransformObjects( geo, xform, True ) does not work on geometry input from an outside component. is a Brep or any other geometry type.

Specific example:
Create a GHpython component with the x input as a Box or any Brep.

Code:

sample script to show how to use this component and rhinoscriptsyntax

import math
import rhinoscriptsyntax as rs

geo = x
cplane = rs.WorldXYPlane()
xform = rs.XformRotation2(y, cplane[3], cplane[0])

rs.TransformObjects( geo, xform, True )

I realize if I use the code:

geo=ghdoc.Objects.AddBrep(x)

to create an ID I can use in rs.TransformObjects, but that line should not be required.

Add built-in variable for ghpython scripts to access Grasshopper.Kernel.IGH_ActiveObject. This allows for access to the same bits and pieces that VB/# scripts have access to in grasshopper. See the DottetLine.gh VB script component for a sample
http://www.grasshopper3d.com/forum/topics/display-pipeline?commentId=2985220%3AComment%3A639887

If I create a complex number in Ghpython:

b = complex(1.0,2.0)

And I output into Grasshopper. Then try to run it into a Complex number param. It does not look like a complex number to Grasshopper.

I think with some marshaling this could be a complex to grasshopper.

add link in editor for opening the python help file

Look up Guids from both ghdoc and rhinodoc

Exact details of when this should be enabled to be discussed

this component does not work with the new version grasshopper.

double click -- no reaction.
right click and choose "open editor" -- rhino crashes.

In the the input Type Hint could use a GhDoc type. This would create an incoming geometry ID automatically. Steve know about this if you need more information.

Hi Steve,

If one outputs a mesh from a GhPython component this mesh does not "respect" the GH setting "Display -> Preview Mesh Edges". Specifically, the mesh always renders with edges turned on.

This is not a huge deal obviously, but I do tend to issue my components in "neat packages" in which all the output "looks nice" and predictable. Usually also with a custom Rhino DisplayMode accompanying the GH definition. So if this bug could be fixed that would be great.

Best,

Anders

I often import the Grasshopper assembly in order to construct data trees for outputting nested Python lists and such.

In order to do this I usually do this:

import clr;
clr.AddReference("Grasshopper")
import Grasshopper as gh

While this is not a major problem, it would be great if the Grasshopper assembly was automatically added so I could simply go:

import Grasshopper as gh

Cheers,
Anders

In trying to load the NumPy packages through ghpython, I seem to need the CodeContext of the ironpython instance. Would someone now how to access this, or could you make it available?

Search and Replace - It is available in the RhinoScript editor, but not in the python editor.

http://python.rhino3d.com/threads/890-Feature-requests-Rhino-python-editor

Right now, if I create a new grasshopper definition, and add a ghpython component, the fresh component returns the following error:

Runtime error (MissingMemberException): 'ScopeStorage' object has no attribute 'scriptcontext'
Traceback (most recent call last):
AttributeError: 'ScopeStorage' object has no attribute 'scriptcontext'

I've tried changing the rhinoscriptsyntax usage to all different settings, and it appears to occur without regard to any input code.
First began after I copied and pasted a python component from an existing definition into a new definition.

Now to try other basic tactics (restart Rhino, computer, etc.) ...

wish: do not ask to save if editor text is unchanged

This is the exact error I get:

Runtime error (ValueErrorException): Could not convert c8d0071b-9239-4e44-b719-4a91f7eef3d0 to a list of points
Traceback:
  line 421, in coerce3dpointlist, "C:\Users\benjamin\AppData\Roaming\McNeel\Rhinoceros\5.0\Plug-ins\IronPython (814d908a-e25c-493d-97e9-ee3861957f49)\settings\lib\rhinoscript\utility.py"
  line 530, in coerceline, "C:\Users\benjamin\AppData\Roaming\McNeel\Rhinoceros\5.0\Plug-ins\IronPython (814d908a-e25c-493d-97e9-ee3861957f49)\settings\lib\rhinoscript\utility.py"
  line 44, in LineIsFartherThan, "C:\Users\benjamin\AppData\Roaming\McNeel\Rhinoceros\5.0\Plug-ins\IronPython (814d908a-e25c-493d-97e9-ee3861957f49)\settings\lib\rhinoscript\line.py"
  line 3, in script

from: http://www.grasshopper3d.com/xn/detail/2985220:Comment:388617

Provide a better contextual help for this component in Grasshopper

I was wondering if it is possible to write codes in an exterior editor like vim or emacs? The original editor is quite not friendly to use.

• Disable a python script component
• Double click to edit your script
• click ok
• Double click to edit your script again. It is gone and replaced with the default template script

Posted on python forum at http://python.rhino3d.com/threads/994-Grasshopper-python-component-suggestion

Hi Giulio,

OK, thanks! Couple of other things -

1. Once you put your own script in there, the component can't distinguish from no input, insufficient input or incorrect input. With normal GH components, the first two result in an orange component color, the last with a red. With GHPython it's always red until it's correct. I would like to see the component be orange when one or more inputs are disconnected, don't know if that's possible.

2. I would like to be able to prompt the user as what the component is expecting at the inputs and and returning at the outputs - right now all you have is "Script variable X..." , but the standard components give you the actual description of the data it is expecting - so that would imply in the input/output manager would have a place to type in these names, and then they could show up when someone hovers the mouse over the spot.

3. Relative to the above, if a type hint (such as "curve") is given for any input, that the input right click generic "set one data item" changes to the type specific "set one curve"...

Thanks, --Mitch

User request: being able to add more descriptive comments

http://python.rhino3d.com/threads/849-GH-Python-component

If type hints are set for any inputs, and then you open input manager and create new inputs, all previous type hints are lost.

When an existing grasshopper file is opened with a python component. The python engine sometimes fails on the initial execution of the script. The second time the script is executed, everything works fine. I think this is due to the initialization of the python engine occurring in another thread and somewhere a lock is not being set properly.

When you run mesh face normals through a function that calls Coerce3dPoint or Coerce3dVector, you get an exception.

This affects many functions from the RhinoScriptSyntax module. A workaround is to call Rhino.Geometry.Vector3f.ToString(). These functions work fine with a string version of the vector.

Arthur

This is a message for the project maintainer. Because of this discussion I noticed, and thought to let you know, that the GhPython component now misbehaves when modifying the presentation style. It also fails to deserialize outputs if the “out” output is hidden.

http://www.grasshopper3d.com/forum/topics/datatreelistitem-access-from

You do not need to answer this message. It is just for your information.

If I create a circle using rs.addcircle or rs.addcircle3pt should create a Rhino Circlecurve. If I try and output that from GHpython it is not marshaled as a Circle in Grasshopper.

It might be useful to be able to import modules that are in the same folder as the ghx file (add ghx folder to search path)

I'm not as concerned about the position, but every time I edit a script it is not the size I want to work with.

In the C# and VB.NET scripting components, it is possible to include functions below the main script, in the editor, and to collapse these code blocks.

It would be really nice to have the ability to collapse blocks of code, so that one could include a large amount of additional functions or classes in a script without compromising readability. This offers an alternative to importing packages.

GhPython will not load into Grasshopper because of a CAS .Net conflict. Error message below:

An attempt was made to load an assembly from a network location which would have caused the assembly to be sandboxed in previous versions of the .NET Framework. This release of the .NET Framework does not enable CAS policy by default, so this load may be dangerous. If this load is not intended to sandbox the assembly, please enable the loadFromRemoteSources switch. See http://go.microsoft.com/fwlink/?LinkId=155569 for more information.

Followed MS recommendations and added a CAS configuration file in the Rhino System directory and the error is no longer reported but the component will not load. Visual Studio Shell 2010 is installed to develop WTF IronPython applications and this might be the cause of the conflict.

Followed all other MS recommendations - unblocked the file etc.

The object/class/function browser on the left side of the standard script editor (in EditPythonScript), should also be available in the grasshopper component. We should be able to add other libraries to this browser like grasshopper.dll to view what classes and functions are available

Reset engine in RhinoPython results in this error in GhPython (until the user restarts Rhino)

Runtime error (ImportException): No module named scriptcontext
Traceback:
line 1, in script

The file menu should support saving the script as a stand alone python file. I think the export function is fine, it might just need to be set up to save as a .py file extension

http://www.grasshopper3d.com/forum/topics/gh-python-component-why-the

How would I create these datatypes in GhPython to output as the native Grasshopper datatypes?

1. Box - should we marshall an rs.Addbox result into a Box type?
2. Rectangle - should we marshall a rs.AddPlanesurface?

Here is my gh python script:

import Rhino
import scriptcontext
# if the switch is on:
if ImportSwitch == True:
    opt = Rhino.FileIO.FileReadOptions()
    opt.ImportMode = True
    # if the delete is on:
    if DeleteSwitch == True:
        objtype = Rhino.DocObjects.ObjectType.AnyObject
        enumSettings = Rhino.DocObjects.ObjectEnumeratorSettings()
        enumSettings.ObjectTypeFilter = objtype
        guids = [o.Id for o in scriptcontext.doc.Objects.FindByFilter(enumSettings)]
        scriptcontext.doc.Objects.Delete(guids, True)
    # for each file:
    for fpath in FilePaths:
        # import it
        scriptcontext.doc.ReadFile(fpath, opt)
layerTree = []
# get everything on the layers
for layname in LayerNames:
    objs = scriptcontext.doc.Objects.FindByLayer(layname)
    guidString = ','.join([str(obj.Id) for obj in objs])
    layerTree.append(guidString)
a = layerTree

the input variables are:

• ImportSwitch , Item access, Boolean type hint
• DeleteSwitch, Item access, Boolean type hint
• FilePaths, list access, string type hint
• LayerNames, list access string type hint

scriptcontext.doc is targeted to the Rhino doc, not the gh doc
if ImportSwtich is False, and I change the the contents of FilePaths, I would expect this to not read any files. But it reads files any time that the contents of FilePaths are changed. even while ImportSwitch is off.

... and the guidstrings are a hack becauuse I don't know how to make DataTrees in python. : /

my apologies if I'm posting too many issues. It means that I'm really excited about this component. :D

I think I broke something. If I open rhino 5 and grasshopper (after a fresh reinstall of both and a reboot), get out a new ghpython component and try to switch the target doc, Rhino crashes.

This started happening after I did the following:

I created a module (I'll call it module1) to be imported by the ghpython script. In this module I had a line like this:

# inside of module1
from scriptcontext import doc

I assumed that when I imported the module, it would use the same target doc as set by the ghpython component, but it does not. Instead each imported module targets only the gh doc, not the rhino doc.

So then I tried something that seems to have broken the ghpython component. In the imported module, I removed the line containing from scriptcontext import doc. But within the module, I had functions that still made use of a module-level global variable called doc that was not assigned within that module. So I tried to pass the doc object from the ghpython script into the module like so (as seen in the ghpython script):

# in the ghpython script
from scriptcontext import doc
import module1
module1.doc = doc # I think this was a bad idea, but I was curious
from module1 import myfunction # myfunction makes use of doc
myfunction()

The script ran once, correctly using the rhino doc as the target doc for both myfunction as well as in the ghpython script.
Then Rhino crashed, and I haven't been able to set the target doc without crashing Rhino since.

I'm curious how and if I really broke something that could not be fixed with a reinstall and a reboot.

Thanks.

The python component really needs a debugger similar to the one in EditPythonScript

http://www.grasshopper3d.com/forum/topics/grasshopper-python-script-editor-keyboard-shortcuts

If I use rs.AddArc, rs.AddArc3pt or rs.AddArcPtTanPt then I should get an ArcCurve. When i pass this out ghpython, I do not get an Arc. Can we marshal an arc from the guiid?

Add Grips support as requested here:

http://www.grasshopper3d.com/forum/topics/a-rhinoscript-method-is-not-working-in-ghpython

Grasshopper fails to load the GhPython scripting plugin and the error message below is displayed:

Exception System.NotSupportedException:
Message: An attempt was made to load an assembly from a network location which would have caused the assembly to be sandboxed in previous versions of the .NET Framework. This release of the .NET Framework does not enable CAS policy by default, so this load may be dangerous. If this load is not intended to sandbox the assembly, please enable the loadFromRemoteSources switch. See http://go.microsoft.com/fwlink/?LinkId=155569 for more information.

Followed MS recommendations and added a CAS configuration file in the Rhino System directory and the error is no longer reported but the component will not load. Visual Studio Shell 2010 is installed to develop WTF IronPython applications and this might be the cause of the conflict.

Followed all other MS recommendations - unblocked the plugin file etc.

Double click does not bring up the editor with the this version of grasshopper