quakeforge/libs/video/targets/joy.c

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/*
joy.c
Joystick input interface
Copyright (C) 2000 David Jeffery
Copyright (C) 2000 Jeff Teunissen <deek@dusknet.dhs.org>
Copyright (C) 2001 Ragnvald `Despair` Maartmann-Moe IV
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This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
static __attribute__ ((used)) const char rcsid[] =
"$Id$";
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#include "QF/cvar.h"
#include "QF/input.h"
#include "QF/joystick.h"
#include "QF/keys.h"
#include "QF/mathlib.h"
#include "QF/sys.h"
#include "QF/va.h"
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#include "compat.h"
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cvar_t *joy_device; // Joystick device name
cvar_t *joy_enable; // Joystick enabling flag
cvar_t *joy_amp; // Joystick amplification
cvar_t *joy_pre_amp; // Joystick pre-amplification
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qboolean joy_found = false;
qboolean joy_active = false;
typedef struct {
const char *name;
const char *string;
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} ocvar_t;
ocvar_t joy_axes_cvar_init[JOY_MAX_AXES] = {
{"joyaxis1", "1"},
{"joyaxis2", "2"},
{"joyaxis3", "3"},
{"joyaxis4", "0"},
{"joyaxis5", "0"},
{"joyaxis6", "0"},
{"joyaxis7", "0"},
{"joyaxis8", "0"}
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};
struct joy_axis joy_axes[JOY_MAX_AXES];
struct joy_button joy_buttons[JOY_MAX_BUTTONS];
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VISIBLE void
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JOY_Command (void)
{
JOY_Read ();
}
VISIBLE void
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JOY_Move (void)
{
float mult_joy;
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int i;
if (!joy_active || !joy_enable->int_val)
return;
mult_joy = (joy_amp->value * joy_pre_amp->value *
in_amp->value * in_pre_amp->value) / 200.0;
// Yes, mult_joy looks like a mess, but use of pre_amp values is useful in
// scripts, and *_pre_amp will matter once joystick filtering/acceleration
// is implemented
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for (i = 0; i < JOY_MAX_AXES; i++) {
switch (joy_axes[i].axis->int_val) {
case 1:
if (joy_axes[i].current)
viewdelta.angles[YAW] -= joy_axes[i].current * mult_joy;
break;
case -1:
if (joy_axes[i].current)
viewdelta.angles[YAW] += joy_axes[i].current * mult_joy;
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break;
case 2:
if (joy_axes[i].current)
viewdelta.position[2] -= joy_axes[i].current * mult_joy;
break;
case -2:
if (joy_axes[i].current)
viewdelta.position[2] += joy_axes[i].current * mult_joy;
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break;
case 3:
if (joy_axes[i].current)
viewdelta.position[0] += joy_axes[i].current * mult_joy;
break;
case -3:
if (joy_axes[i].current)
viewdelta.position[0] -= joy_axes[i].current * mult_joy;
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break;
case 4:
if (joy_axes[i].current)
viewdelta.angles[PITCH] -= joy_axes[i].current * mult_joy;
break;
case -4:
if (joy_axes[i].current)
viewdelta.angles[PITCH] += joy_axes[i].current * mult_joy;
break;
case 5:
if (joy_axes[i].current)
viewdelta.position[1] -= joy_axes[i].current * mult_joy;
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break;
case -5:
if (joy_axes[i].current)
viewdelta.position[1] += joy_axes[i].current * mult_joy;
break;
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// Futureproofing
case 6:
if (joy_axes[i].current)
viewdelta.angles[ROLL] += joy_axes[i].current * mult_joy;
break;
case -6:
if (joy_axes[i].current)
viewdelta.angles[ROLL] -= joy_axes[i].current * mult_joy;
break;
default:
break;
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}
}
}
VISIBLE void
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JOY_Init (void)
{
int i;
if (JOY_Open () == -1) {
Sys_MaskPrintf (SYS_VID, "JOY: Joystick not found.\n");
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joy_found = false;
joy_active = false;
return;
}
joy_found = true;
if (!joy_enable->int_val) {
Sys_MaskPrintf (SYS_VID, "JOY: Joystick found, but not enabled.\n");
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joy_active = false;
JOY_Close ();
}
Sys_MaskPrintf (SYS_VID, "JOY: Joystick found and activated.\n");
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// Initialize joystick if found and enabled
for (i = 0; i < JOY_MAX_BUTTONS; i++) {
joy_buttons[i].old = 0;
joy_buttons[i].current = 0;
}
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joy_active = true;
}
static void
joyamp_f (cvar_t *var)
{
Cvar_Set (var, va ("%g", max (0.0001, var->value)));
}
VISIBLE void
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JOY_Init_Cvars (void)
{
int i;
joy_device = Cvar_Get ("joy_device", "/dev/js0", CVAR_NONE | CVAR_ROM, 0,
"Joystick device");
joy_enable = Cvar_Get ("joy_enable", "1", CVAR_NONE | CVAR_ARCHIVE, 0,
"Joystick enable flag");
joy_amp = Cvar_Get ("joy_amp", "1", CVAR_NONE | CVAR_ARCHIVE, joyamp_f,
"Joystick amplification");
joy_pre_amp = Cvar_Get ("joy_pre_amp", "1", CVAR_NONE | CVAR_ARCHIVE,
joyamp_f, "Joystick pre-amplification");
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for (i = 0; i < JOY_MAX_AXES; i++) {
joy_axes[i].axis = Cvar_Get (joy_axes_cvar_init[i].name,
joy_axes_cvar_init[i].string,
CVAR_ARCHIVE, 0, "Set joystick axes");
}
}
VISIBLE void
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JOY_Shutdown (void)
{
if (!joy_active)
return;
JOY_Close ();
joy_active = false;
joy_found = false;
}