1gl_line(3) Svgalib User Manual gl_line(3)
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6 gl_line - draw a line
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10 #include <vgagl.h>
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12 void gl_line(int x1, int y1, int x2, int y2, int c);
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16 Draw a line from point (x1, y1) to (x2, y2) inclusively in color c.
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18 You should not assume that the same drawing trajectory is used when you
19 exchange start and end points.
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21 To use this program one first sets up a mode with a regular vga_setmode
22 call and vga_setpage(0), with possibly a vga_setlinearaddressing call.
23 Then a call to gl_setcontextvga(mode) is made. This makes the informa‐
24 tion about the mode available to gl_line.
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26 The pixels are placed directly into video memory using inline coded
27 commands.
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31 svgalib(7), vgagl(7), svgalib.conf(5), threedkit(7), testgl(1),
32 plane(1), wrapdemo(1), gl_circle(3), gl_clearscreen(3), gl_hline(3),
33 gl_setpixel(3), gl_setpixelrgb(3), gl_setcontextvga(3).
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37 This manual page was edited by Michael Weller <eowmob@exp-math.uni-
38 essen.de>. The exact source of the referenced demo as well as of the
39 original documentation is unknown. This page was modified by Don
40 Secrest <secrest@uiuc.edu>.
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42 It is very likely that both are at least to some extent are due to Harm
43 Hanemaayer <H.Hanemaayer@inter.nl.net>.
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45 Occasionally this might be wrong. I hereby asked to be excused by the
46 original author and will happily accept any additions or corrections to
47 this first version of the svgalib manual.
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51Svgalib (>= 1.2.11) 21 Aug 1999 gl_line(3)