1mouse_setwrap(3) Svgalib User Manual mouse_setwrap(3)
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6 mouse_setwrap - set what happens at the mouse boundaries
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9 #include <vgamouse.h>
10 void mouse_setwrap(int state);
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15 This routine determines what to do if the mouse position reaches a
16 boundary.
17 state should be either MOUSE_WRAP, MOUSE_NOWRAP, or a bitwise or of
19 MOUSE_WRAPX, MOUSE_WRAPY, MOUSE_WRAPZ, MOUSE_WRAPRX, MOUSE_WRAPRY, or
20 MOUSE_WRAPRZ. These define if all or the respective coordinates wrap
21 or are clipped at the ends.
22 This variable has been overloaded for the case of multi-dimensional
24 mice that support rotations and can be used to select the coordinate
25 system used to return the current position of the mouse.
26 If the above value of state is also ored with MOUSE_ROT_RX_RY_RZ, rota‐
28 tional information will be returned as the angular position as
29 expressed by the total angle wound around the X, Y, and Z axes. This
30 is the simplest coordinate system to use, but it's also the least use‐
31 ful, since angular rotations about perpendicular axes don't commute.
32 There are situations where this system might be useful, for controlling
33 truly independent quantities, such as color, with each axis being used
34 to dial a level of red, green, or blue, but for modeling the actual
35 orientation of a physical object, it's utterly hopeless.
36 If state is instead ored with MOUSE_ROT_INFINITESIMAL, the angular
38 positions returned are expressed as differences from the previously
39 reported position. If the differences are sufficiently small, the
40 angular displacements will commute with each other and can be used to
41 track the motion of a physical object. Other coordinate systems, such
42 as yaw, pitch, and roll, could be defined, but haven't been done due to
43 lack of time. If you feel you need this feature, send mail to Eric
44 Sharkey <sharkey@superk.physics.sunysb.edu> and he just might consider
45 coding it up.
46 MOUSE_WRAP and MOUSE_ROT_COORDS can be used to mask out the bits used
48 for wrap and coordinate states, respectively.
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52 svgalib(7), vgagl(7), libvga.config(5), eventtest(6), mouse_close(3),
53 mouse_init(3), mouse_getposition_6d(3), mouse_setposition(3),
54 mouse_setscale(3), mouse_getx(3), mouse_setxrange(3), mouse_update(3),
55 mouse_waitforupdate(3), vga_setmousesupport(3), mouse_seteven‐
56 thandler(3), vga_waitevent(3)
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59 This manual page was edited by Michael Weller <eowmob@exp-math.uni-
60 essen.de>. The exact source of the referenced function as well as of
61 the original documentation is unknown.
62 It is very likely that both are at least to some extent are due to Harm
64 Hanemaayer <H.Hanemaayer@inter.nl.net>.
65 Occasionally this might be wrong. I hereby asked to be excused by the
67 original author and will happily accept any additions or corrections to
68 this first version of the svgalib manual.
69Svgalib (>= 1.2.11) 27 July 1997 mouse_setwrap(3)