Softimage - For selected model nulls, finds renderable items and groups them according to their source models.

GroupMeshesByModel.py

# Group Meshes By Model

# DESCRIPTION
# - Adds a new command, GroupMeshesByModel(), which can be called from a key assignment or shelf button.
# - For selected model nulls, finds renderable items and groups them according to their source models.
# - Groups the following: meshes, pointclouds, instances, and hair.

# INSTALLATION
# This is a self-installing plugin, so place it in your user scripts
# or similar folder in the workgroup of your choosing.

# USAGE
# Select the model nulls you want to effect and run the command.

import win32com.client
from win32com.client import constants


def XSILoadPlugin( in_reg ):
    in_reg.Author = "Tim Crowson"
    in_reg.Name = "GroupMeshesByModel"
    in_reg.Major = 1
    in_reg.Minor = 0
    in_reg.RegisterCommand("GroupMeshesByModel","GroupMeshesByModel")
    return True

def XSIUnloadPlugin( in_reg ):
    strPluginName = in_reg.Name
    Application.LogMessage(str(strPluginName) + str(" has been unloaded."),constants.siVerbose)
    return True

def GroupMeshesByModel_Init( in_ctxt ):
    oCmd = in_ctxt.Source
    oCmd.Description = ""
    oCmd.ReturnValue = True
    return True

def GroupMeshesByModel_Execute(  ):
    Application.LogMessage("GroupMeshesByModel_Execute called",constants.siVerbose)

    selectedModels = [x for x in Application.Selection if x.Type == "#model"]
    groups = [ str(x) for x in Application.FindObjects("", "{9D0673C2-6741-11D1-BE9F-00A024EE478D}")]

    for model in selectedModels:

        # Get or create the group 
        grpName = "GEO_%s"%model
        grpFullName = "%s.%s"%(model.parent, grpName)
        
        if model.ModelKind == 0 and grpFullName in groups:
            grp = Application.Dictionary.GetObject(grpFullName)
        else:
            grp = Application.ActiveProject2.ActiveScene.Root.AddGroup(None, grpName)
        
        # Add polymeshes
        for y in model.FindChildren("", "polymsh"):
            grp.AddMember(y, False)

        # Add pointclouds
        for y in model.FindChildren("", "pointcloud"):
            grp.AddMember(y, False)

        # Add instances
        for y in model.FindChildren("", "#model"):
            if y.ModelKind == 2:
                grp.AddMember(y, False)
        
        # Add hair
        for y in model.FindChildren("", "hair"):
            grp.AddMember(y, False)

    return True