Graphical Output

The form of graphical output is very dependent on the hardware used to produce it and the local software used to drive that hardware. CCSL addresses this problem by chanelling all calls to the plotter hardware through a single SUBROUTINE PIGLET.

There is a separate section of the CCSL Master File which contains various PIGLETs which have been written to drive different devices, such as Tektronix 4010 terminals and BENSON plotters. Special PIGLETs for GKS, PostScript and PGPLOT interfaces are also included. A user who wishes to compile a program which uses CCSL graphics should extract the most suitable SUBROUTINE PIGLET from the Master File, modify it if necessary, and include it in his link statement together with any graphics libraries called by this particular PIGLET.

In many cases the output will drive a graphics terminal directly and local system facilities will be used to obtain hard copies. Output files destined for centralised plotters will usually be created and named by the local system software.

When the graphical output is sent directly to a file by the CCSL graphics interface, for instance when using the PostScript or PGPLOT PIGLETs the output file will be named by CCSL, usually with the name of the program, a sequence number and an extension approriate to the type of output (e.g. .PS for a PostScript file).

Plotting in colour

16 different colour names are recognised by CCSL using the first 3 letters of their names (case insensitive), they are:

Number		Name	Red	Green	Blue
0		White	1.00	1.00	1.00
1		Black	0.00	0.00	0.00
2		Red	1.00	0.00	0.00
3		Green	0.00	1.00	0.00
4		Blue	0.00	0.00	1.00
5		Cyan	0.00	1.00	1.00
6		Magenta	1.00	0.00	1.00
7		Yellow	1.00	1.00	0.00
8		Orange	1.00	0.50	0.00
9		SpringGreen	0.50	1.00	0.00
10		SeaGreen	0.00	1.00	0.50
11		Aqua	0.00	0.50	1.00
12		Purple	0.50	0.00	1.00
13		Pink	1.00	0.00	0.50
14		DkGrey	0.33	0.33	0.33
15		LtGrey	0.66	0.66	0.66

The function LCOLPG will convert a colour name to a colour number recognised by PIGLET.

Plotting Symbols

Symbols in CCSL are plotted using the subroutine KANGA3 which recognises 9 different symbol shapes and two fill types: filled and open. The full list of symbols with their names is given below. The names are recognised by case insensitive matching of the first 6 letters; and the fill property by case insensitive matching of the first 4 letters in filled or open.

Number		Name	Description	Filled/Open
1		square	Square	Yes
2		trianup	Triangle vertex up	Yes
3		triandown	Triangle vertex down	Yes
4		circle	A hexagon	Yes
5		xcross	Cross with diagonal members	No
6		plussign	Cross with hor. and vert. bars	No
7		eggtimer	Xcross with ends closed	Yes
8		bowtie	Eggtimer rotated 90 degreep	Yes
9		diamond	Square rotated 45 degrees	Yes

The function LSYMPG will convert a symbol name and fill type into a symbol number for input to KANGA3.