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# This Python file uses the following encoding: utf-8
import rhinoscriptsyntax as rs
import scriptcontext

rs.Command("_RenderLoadMaterialFromFile C:\\glass.rmtl")


def FindMaterialByName(mat_name):
    # find a material by name
    mat_table = scriptcontext.doc.Materials
    mat_index = mat_table.Find(mat_name, True)
    if mat_index >= 0:
        print("{0} found at index {1}").format(mat_name, mat_index)
    else:
        print("material named {} not found in table").format(mat_name)

if __name__=="__main__":
    FindMaterialByName("glass")

obj = rs.GetObject()

if obj:

    index = rs.ObjectMaterialIndex(obj)

    if index==-1: index = rs.AddMaterialToObject(obj)