SET INVISIBILITY FILTER

PSET_INVIS_FILTER

CALL SEQUENCE

void pset_invis_filter(

Pint	ws_id	/* workstation identifier	*/
const Pfilter	*filter	/* invisibility filter	*/

)

TYPES

typedef struct {
	Pint_list	incl_set;	/* inclusion set 	*/
	Pint_list	excl_set;	/* exclusion set 	*/
} Pfilter;

typedef struct {
	Pint	num_ints;	/* number of Pints in list 	*/
	Pint	*ints;	/* list of integers 	*/
}Pint_list;

PHIGS STATE

EFFECT

The invisibility filter entry in the ws_id workstation state list is set to the values defined by filter.

During traversal, the invisibility filter is compared with the current name set entry arguments of the PHIGS traversal state list in order to determine the visibility of the primitives which follow.

Primitives invisibility conditions:

(Invisibility filter inclusion set) intersect (current name set) is not an empty set

and

(Invisibility filter exclusion set) intersect (current name set) is an empty set.

ERRORS

3

Ignoring function, function requires state (PHOP, WSOP,*,*)

54

Ignoring function, the specified workstation is not open

59

Ignoring function, the specified workstation does not have output capability (i.e. the workstation category is neither OUTPUT, OUTIN, nor MO)

SEE ALSO

add name to set, remove name from set, inquire invisibility filter