mattcox

import lx
import lxu.select

scn_svc = lx.service.Scene()

def IsItAMask(item):   
    if scn_svc.ItemTypeName(scn_svc.ItemTypeSuper(item.Type())) == lx.symbol.sITYPE_TEXTURELAYER:
        scene = item.Context()
        graph = lx.object.ItemGraph(scene.GraphLookup(lx.symbol.sGRAPH_SHADELOC))
        if graph.RevCount(item) > 0:

mattcox

/*

	matchXfrm.cpp
 
	Sample plugin to demonstrate a simple command that matches
	position, rotation and scale between multiple selected items.
 
	This command operates slightly differently to the built in
	match.position, rotation, scale commands. The built in commands
	will average out the transform if multiple items are selected,

mattcox

/*
This snippet is to demonstrate how to write to a matrix channel
in modo from an eval modifier. This is the correct way to write
to a matrix. This does assume that you have set the matrix channel
you want to drive as a channel for the modifier, using something like:
eval.AddChan(item_loc, LXsICHAN_XFRMCORE_WPOSMATRIX, LXfECHAN_WRITE);
in your modifier constructor. This method will drive the matrix
channel directly, so instead of using the local channels to calculate
the world SRT, it'll use the values the modifier provides it with.
*/