User`s guide

10 Functions — Alphabetical List

10-86

vrnode/isvalid

1 if vrnode object is valid, 0 if not

Syntax

x = isvalid(vrnode_object_vector)

Arguments

vrnode_object_vector Name of an array of vrnode objects to be queried.

Description

This method returns an array that contains 1 when the elements of

vrnode_object_vector are valid vrnode objects, and 0 when they are not.

The vrnode object is considered valid if the following conditions are met:

• The parent world of the node exists.

• The parent world of the node is open.

• The VRML node with the given vrnode handle exists in the parent world.