newtree/source/joy_linux.c

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/*
joy_linux.c
Joystick driver for Linux
Copyright (C) 2000 David Jeffery
Copyright (C) 2000 Jeff Teunissen <deek@dusknet.dhs.org>
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
$Id$
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <linux/joystick.h>
#include <fcntl.h>
#include <unistd.h>
#include "console.h"
#include "client.h"
#include "cvar.h"
#include "keys.h"
#include "protocol.h"
#include "view.h"
#define JOY_MAX_AXES 6
2001-01-14 03:22:03 +00:00
#define JOY_MAX_BUTTONS 16
cvar_t *joy_device; // Joystick device name
cvar_t *joy_enable; // Joystick enabling flag
cvar_t *joy_sensitivity; // Joystick sensitivity
qboolean joy_found = false;
qboolean joy_active = false;
// Variables and structures for this driver
int joy_handle;
typedef struct {
char *name;
char *string;
} ocvar_t;
struct joy_axis {
cvar_t *axis;
ocvar_t var;
int current;
};
struct joy_button {
int old;
int current;
};
struct joy_axis joy_axes[JOY_MAX_AXES] = {
{NULL, {"joyaxis1", "1"}, 0},
{NULL, {"joyaxis2", "2"}, 0},
{NULL, {"joyaxis3", "3"}, 0},
{NULL, {"joyaxis4", "0"}, 0},
{NULL, {"joyaxis5", "0"}, 0},
{NULL, {"joyaxis6", "0"}, 0}
};
struct joy_button joy_buttons[JOY_MAX_BUTTONS];
void
JOY_Command (void)
{
struct js_event event;
if (!joy_active || !joy_enable->int_val)
return;
while (read (joy_handle, &event, sizeof (struct js_event)) > -1) {
if (event.type & JS_EVENT_BUTTON) {
if (event.number >= JOY_MAX_BUTTONS)
continue;
joy_buttons[event.number].current = event.value;
if (joy_buttons[event.number].current >
joy_buttons[event.number].old) {
Key_Event (K_AUX1 + event.number, 0, true);
} else {
if (joy_buttons[event.number].current <
joy_buttons[event.number].old) {
Key_Event (K_AUX1 + event.number, 0, false);
}
}
joy_buttons[event.number].old = joy_buttons[event.number].current;
} else {
if (event.type & JS_EVENT_AXIS) {
if (event.number >= JOY_MAX_AXES)
continue;
joy_axes[event.number].current = event.value;
}
}
}
}
void
JOY_Move (usercmd_t *cmd)
{
int i;
if (!joy_active || !joy_enable->int_val)
return;
Cvar_SetValue (joy_sensitivity, bound (1, joy_sensitivity->value, 25));
for (i = 0; i < JOY_MAX_AXES; i++) {
switch (joy_axes[i].axis->int_val) {
case 1:
cl.viewangles[YAW] -=
m_yaw->value * (float) (joy_axes[i].current /
(201 -
(joy_sensitivity->value * 4)));
break;
case 2:
cmd->forwardmove -=
m_forward->value * (float) (joy_axes[i].current /
(201 -
(joy_sensitivity->value * 4)));
break;
case 3:
cmd->sidemove +=
m_side->value * (float) (joy_axes[i].current /
(201 -
(joy_sensitivity->value * 4)));
break;
case 4:
if (joy_axes[i].current) {
V_StopPitchDrift ();
cl.viewangles[PITCH] -=
m_pitch->value * (float) (joy_axes[i].current /
(201 -
(joy_sensitivity->value *
4)));
cl.viewangles[PITCH] =
bound (-70, cl.viewangles[PITCH], 80);
}
break;
}
}
}
void
JOY_Init (void)
{
// Open joystick device
joy_handle = open (joy_device->string, O_RDONLY | O_NONBLOCK);
if (joy_handle < 0) {
Con_Printf ("JOY: Joystick not found.\n");
} else {
int i;
joy_found = true;
if (!joy_enable->int_val) {
Con_Printf ("JOY: Joystick found, but not enabled.\n");
i = close (joy_handle);
if (i) {
Con_Printf ("JOY: Failed to close joystick device!\n");
}
} else {
// Initialize joystick if found and enabled
for (i = 0; i < JOY_MAX_BUTTONS; i++) {
joy_buttons[i].old = 0;
joy_buttons[i].current = 0;
}
joy_active = true;
Con_Printf ("JOY: Joystick found and activated.\n");
}
}
}
void
JOY_Init_Cvars (void)
{
int i;
joy_device =
Cvar_Get ("joy_device", "/dev/js0", CVAR_NONE | CVAR_ROM, NULL,
"Joystick device");
joy_enable =
Cvar_Get ("joy_enable", "1", CVAR_NONE | CVAR_ARCHIVE, NULL,
"Joystick enable flag");
joy_sensitivity =
Cvar_Get ("joy_sensitivity", "1", CVAR_NONE | CVAR_ARCHIVE, NULL,
"Joystick sensitivity");
for (i = 0; i < JOY_MAX_AXES; i++) {
joy_axes[i].axis = Cvar_Get (joy_axes[i].var.name,
joy_axes[i].var.string,
CVAR_ARCHIVE, NULL, "Set joystick axes");
}
}
void
JOY_Shutdown (void)
{
int i;
if (!joy_active)
return;
i = close (joy_handle);
if (i) {
Con_Printf ("JOY: Failed to close joystick device!\n");
} else {
Con_Printf ("JOY_Shutdown\n");
}
joy_active = false;
joy_found = false;
}