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3.5 Use of the QUEST Sub-menu


Accumulation and Display of Search TESTs

Examples 1-10 of Section 3.2 have concentrated on the encoding of individual search TEST's. However, a complete search QUESTion may require the use of two or more TEST's that must be logically combined, together with application of some user-defined SCREEN settings in many cases.

Each search TEST that is encoded during an interactive QUEST3D session is assigned a sequential TEST number: T1, T2, T3, etc. The 2D and 3D fragment searches are included in this enumeration.

The QUEST sub-menu allows you to display and examine all current TEST's that are available to the system. Fragment TEST's are depicted graphically, all other TEST's are alphanumeric strings.

Amending a Search TEST

Setting Common SCREEN Restrictions

The INSIST-ON xxxx commands on the QUEST sub-menu cover the most common global search restrictions (see Section 3.4). Selecting one or more of these commands switches on the appropriate search SCREEN(s).

Combining Search TESTs: the QUESTion Line (Vol.2, p.8-4)

Search TEST's can be combined using logical operators expressed as: Creating the question line involves repetition of:

Thus:

	QUEST  T1  .AND.  T2
	QUEST  T1  .OR.  T2  .OR.  T3
	QUEST  T1  .NOT.  T2
There is a precedence order for evaluating logical expressions:

	1st	.NOT.
	2nd	.AND.
	3rd	.OR.
More complete expressions may use one level of parentheses:

	QUEST  (T1 .AND. T2)  .OR.  (T3 .AND. T4)
	QUEST  (.NOT. T4)  .AND.  (T1 .AND. T2)
	QUEST  (T1)  .AND.  (T4 .AND. T7)

If parentheses are used, all Tn's must be in parentheses (see last example above).

It is not necessary to include all TEST's in the QUEST line (especially if earlier ones have been amended!).

If you make a mistake in constructing the QUEST line, select RESET-LOGIC and start again.

The SHOW-CONTROLS command (Vol.2, p.8-8)

This will display any CONTROL information that has been set in QUEST3D, particularly:

Remember that any screen settings will operate in addition to the search tests coded on the QUESTion line.


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