Purpose
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| GSMK |
(mtype) |
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| APL code |
1322 |
| GKS RCP code |
X'38001700' (939529984) |
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Function: To set marker type.
Attribute function. Selects the current marker type for polymarker output
primitives.
Parameters
mtype (specified by user) (fullword integer)
The marker type identifier. This should be either a negative value
indicating an implementation-dependent marker type, or one of the
following:
- 1 (GPOINT)
- Small dot
- 2 (GPLUS)
- Plus
- 3 (GAST)
- Asterisk
- 4 (GOMARK)
- Circle
- 5 (GXMARK)
- Diagonal cross
Operating states
GKOP, WSOP, WSAC, SGOP
Related functions
Polymarker (GPM), Inquire marker type (GQMK), Set aspect source flags
(GSASF), Inquire polymarker facilities (GQPMF)
Description
The current marker type in the GKS state list is set to the value given by
mtype. This value is used for the display of subsequent polymarker output
primitives created when the current marker type aspect source flag (ASF)
is individual. (If the ASF is bundled, this value has no effect.)
The marker types specified by negative values of mtype are
implementation-dependent and availability is workstation-dependent. The
following table shows the values for mtype supported by GDDM-GKS.
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|
| Value |
Symbol |
| -6 |
Shaded box |
| -5 |
Shaded diamond |
| -4 |
Asterisk (6 points) |
| -3 |
Hollow box |
| -2 |
Hollow diamond |
| -1 |
Scalable dot |
| 1 |
Dot |
| 2 |
Plus |
| 3 |
Asterisk (8 points) |
| 4 |
Circle |
| 5 |
Diagonal cross |
Marker type 1 is not scaled; when it is drawn at a workstation, GDDM-GKS
ensures that the smallest clearly-visible dot is used.
Here are the five marker types guaranteed by GKS:
If you choose a marker type that is unavailable at a workstation, marker
type 3 is used at that workstation.
Principal errors
- 8
- GKS not in proper state: GKS shall be in one of the states GKOP,
WSOP, WSAC, or SGOP
- 69
- Marker type is equal to zero
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GDDM-GKS V1R1 Programming Guide and Reference
Copyright IBM Corporation 1990, 2012
