1gl_striangle(3) Svgalib User Manual gl_striangle(3)
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6 gl_striangle - draw a solid colored triangle
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10 #include <triangle.h>
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12 void gl_striangle(int x0, int y0, int x1, int y1 , int x2, int y2, int
13 color, int bf);
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17 Draws a non-interpolated (solid) triangle between the three points 0, 1
18 and 2 with the color color.
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20 The bf value is used to tell the routine not to draw the triangle if it
21 is facing the other way. bf tells which way the triangle should be
22 facing to be drawn. since you will more than likely require both com‐
23 binations.
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25 bf = 0 disables drawing when the points are arranged clockwise, bf = 1
26 disables drawing when the points are arranged counter clockwise. bf =
27 -1 will probably always draw the triangle.
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29 Beware, these functions are not a direct part of the svgalib library.
30 Instead their source is part of svgalib and can be found in the threeD‐
31 kit/ subdirectory of the original svgalib distribution. However, it is
32 not installed in the system by default, s.t. it is unclear where you
33 can find it if your svgalib was installed by some linux distribution.
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35 In case of any such problem, simply get an svgalib distribution from
36 the net. Yo don't need to install it. Just make in the threeDkit/ sub‐
37 directory. As of this writing, svgalib-1.2.12.tar.gz is the latest ver‐
38 sion and can be retrieved by ftp from sunsite.unc.edu at
39 /pub/Linux/libs/graphics and tsx-11.mit.edu at /pub/linux/sources/libs
40 which will most probably be mirrored by a site close to you.
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42 The functions are defined in the tri.o and triangl.o files (or their
43 resp. sources) which you must link to your program.
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47 vgagl(7), svgalib(7), threedkit(7), gl_swtriangle(3), gl_triangle(3),
48 gl_trigetcolorlookup(3), gl_trisetcolorlookup(3), gl_trisetdraw‐
49 point(3), gl_wtriangle(3), plane(6), wrapdemo(6).
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53 This manual page was edited by Michael Weller <eowmob@exp-math.uni-
54 essen.de>. The demos, the initial documentation and the whole threedkit
55 stuff was done by Paul Sheer <psheer@icon.co.za>.
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57 Paper mail:
58 Paul Sheer
59 P O BOX 890507
60 Lyndhurst
61 Johannesburg 2106
62 South Africa
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64 Donations (by check or postal order) will be appreciated and will
65 encourage further development of this software. However this is
66 strictly on a voluntary basis where this software falls under the GNU
67 LIBRARY GENERAL PUBLIC LICENSE.
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71Svgalib (>= 1.2.11) 2 Aug 1997 gl_striangle(3)