Topic       : The GFA-Basic Compendium
Author      : GFA Systemtechnik GmbH
Version     : GFABasic.HYP v2.98 (12/31/2023)
Subject     : Documentation/Programming
Nodes       : 899
Index Size  : 28056
HCP-Version : 3
Compiled on : Atari
@charset    : atarist
@lang       : 
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@help       : Help
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@width      : 75
@hostname   : STRNGSRV
@hostname   : CAB     
@hostname   : HIGHWIRE
@hostname   : THING   
View Ref-FileALINE x1,y1,x2,y2,f,ls,m

x1, y1, x2, y2, f, ls, m: iexp

ALINE corresponds to the command LINE, where (x1,y1) and (x2,y2) are the
coordinates of the end points of the line. The expression f contains the
color, which, depending on the current screen resolution, takes values from 0
to 15. 'ls' contains 16 bits of information for the desired style of line
(solid, dashed, dotted, etc.). Each set bit corresponds to one point to be
plotted.

The parameter m determines the graphic mode and can take values from 0 to 3:

    m  Mode
    0  Replace
    1  Transparent
    2  Xor
    3  Reverse Transparent

Example:

    ym%=INT{L~A-4}-1
    FOR i%=0 to 255
      style%=256*i%+i%
      ALINE i%,0,i%,ym%,1,style%,0
    NEXT i%

--> Draws vertical lines of varying dottedness extending from the top to the
    bottom of the screen. The term INT{L~A-4} returns the maximum y coordinate
    of the screen, this being stored four bytes before the beginning of the
    Line-A Variable Table (which starts at the address L~A).

Line-A Arbitrary Line+