Specifying Automatic Clash Detection Mode

Keywords

AUTOCLASH

Description

When automatic clash checking is switched On, a clash check is carried out at the end of every command line in which an element has been modified in some way that could cause a clash to occur; that is:

• When a new element has been created

• When an element’s position and/or orientation has been changed

• When an element’s geometry has been changed

Each clash check is carried out using the current option settings (obstruction list, limits box, etc.), the modified element being included automatically in an implied DESCLASH command (refer to Entering Clash Detection Mode).

The results of each clash check replace those of any previous checks, so that any reported clashes must result from the actions of the last command. Your attention will already be focused on the current element, so that it is usually most convenient to rely on graphical highlighting to show the clash (as explained in Displaying Clashes Visually), rather than to output the clash data to a file. Use the OUTPUT command to see more details of the clash if required.

Automatic clash checking is switched Off by default.

Command Syntax

>--- AUTOCLASH --- <onoff> --->

Querying

Q AUTOCLASH

Note:
In order to avoid spurious clash reports when a new Branch is created, the last section of implied tube in a Branch is checked only if the Branch LTAI attribute is set to True. (The LTAI attribute is set automatically by MODEL when the Branch Tail is positioned.)

Note:
The clash-checking rules are as follows:
If the current element is a Piping Component and is the last component in the Branch, then its leave tube is checked only if the Branch LTAI attribute is set to True.
If the current element is a Branch which has no members, then the tube which constitutes the Branch is checked only if the Branch LTAI attribute is set to True.