OBJ Import setting not changing

.del

Hi -

I'm looking at the git hub example for obj import and ran that code as it is and it leaves me wondering if changing the import settings is working. Based on the git hub script the phong tag should come in at 22.5 degrees.

Another strange thing. I set my preferences to a phong of 60 degrees and closed the preference panel. Then I ran the script which should have imported the obj at 22.5 but instead it actually came in at 180 degrees.

Is it possible that the documentation or perhaps the python implementation is incorrect?

thanks,
.del

Straight from the git -

"""
Copyright: MAXON Computer GmbH
Author: Joey Gaspe

Description:
    - Imports Obj with custom settings.

Class/method highlighted:
    - c4d.plugins.FindPlugin()
    - MSG_RETRIEVEPRIVATEDATA
    - c4d.documents.MergeDocument()

"""
import c4d


def main():
    # Retrieves a path to load the imported file
    selectedFile = c4d.storage.LoadDialog(title="Load File for OBJ Import", type=c4d.FILESELECTTYPE_ANYTHING, force_suffix="obj")
    if not selectedFile:
        return

    # Retrieves Obj import plugin, defined in R17 as FORMAT_OBJ2IMPORT and below R17 as FORMAT_OBJIMPORT
    objExportId = c4d.FORMAT_OBJIMPORT if c4d.GetC4DVersion() < 17000 else c4d.FORMAT_OBJ2IMPORT
    plug = c4d.plugins.FindPlugin(objExportId, c4d.PLUGINTYPE_SCENELOADER)
    if plug is None:
        raise RuntimeError("Failed to retrieve the obj importer.")

    data = dict()
    # Sends MSG_RETRIEVEPRIVATEDATA to OBJ import plugin
    if not plug.Message(c4d.MSG_RETRIEVEPRIVATEDATA, data):
        raise RuntimeError("Failed to retrieve private data.")

    # BaseList2D object stored in "imexporter" key hold the settings
    objImport = data.get("imexporter", None)
    if objImport is None:
        raise RuntimeError("Failed to retrieve BaseContainer private data.")

    # Defines the settings
    objImport[c4d.OBJIMPORTOPTIONS_PHONG_ANGLE_DEFAULT] = 22.5
    if c4d.GetC4DVersion() > 22600:
        objImport[c4d.OBJIMPORTOPTIONS_IMPORT_UVS] = c4d.OBJIMPORTOPTIONS_UV_ORIGINAL
    else:
        objImport[c4d.OBJEXPORTOPTIONS_TEXTURECOORDINATES] = True

    objImport[c4d.OBJIMPORTOPTIONS_SPLITBY] = c4d.OBJIMPORTOPTIONS_SPLITBY_OBJECT
    objImport[c4d.OBJIMPORTOPTIONS_MATERIAL] = c4d.OBJIMPORTOPTIONS_MATERIAL_MTLFILE
    objImport[c4d.OBJIMPORTOPTIONS_POINTTRANSFORM_FLIPZ] = True

    # Finally imports without dialogs
    if not c4d.documents.MergeDocument(doc, selectedFile, c4d.SCENEFILTER_OBJECTS | c4d.SCENEFILTER_MATERIALS, None):
        raise RuntimeError("Failed to load the document.")

    # Pushes an update event to Cinema 4D
    c4d.EventAdd()


if __name__ == '__main__':
    main()

.del

I figured it out.

objImport[c4d.OBJIMPORTOPTIONS_PHONG_ANGLE_DEFAULT] = 22.5

This needs to be in radians versus degrees.

ferdinand

Hello @del,

thank you for reaching out to us and for posting the solution to your problem. As a gentle reminder, all angular values in Cinema 4D are stored in radians. In addition to the function math.radians (and .degrees) there is c4d.utils.RadToDeg (and .DegToRad) to convert between radians and degrees.

Cheers,
Ferdinand

.del

Hi @ferdinand -

What do you think about changing the git file to math.radians(22.5)?

Thanks,
.del

ferdinand

Hey @del,

Thank you for pointing out that this part of our examples, I overlooked this aspect this morning. I have fixed the issue in our local repository for import_obj_r13.py. The updated line is:

objImport[c4d.OBJIMPORTOPTIONS_PHONG_ANGLE_DEFAULT] = c4d.utils.DegToRad(22.5)

and it will go live with the next docs update. I cannot update the legacy version of the SDK in import_OBJ.py as I lack the permissions to write there even in our local repository.

Cheers,
Ferdinand