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force_feedback.h
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1 /*
2  * Vega Strike
3  * Copyright (C) 2001-2002 Daniel Horn
4  *
5  * http://vegastrike.sourceforge.net/
6  *
7  * This program is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU General Public License
9  * as published by the Free Software Foundation; either version 2
10  * of the License, or (at your option) any later version.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20  */
21 
22 /*
23  * Force Feedback support by Alexander Rawass <alexannika@users.sourceforge.net>
24  */
25 
26 //#define HAVE_FORCE_FEEDBACK 1
27 
28 #ifndef _FORCE_FEEDBACK_H_
29 #define _FORCE_FEEDBACK_H_
30 #ifndef _WIN32
31 #include <sys/types.h>
32 #include <sys/stat.h>
33 #include <fcntl.h>
34 
35 #include <unistd.h>
36 #include <string.h>
37 #include <sys/ioctl.h>
38 #endif
39 #include <stdio.h>
40 
41 #if HAVE_FORCE_FEEDBACK
42 
43 #include <linux/input.h>
44 
45 #define BITS_PER_LONG (sizeof (long)*8)
46 #define OFF( x ) ( (x)%BITS_PER_LONG )
47 #define BIT( x ) ( 1UL<<OFF( x ) )
48 #define LONG( x ) ( (x)/BITS_PER_LONG )
49 #define test_bit( bit, array ) ( ( array[LONG( bit )]>>OFF( bit ) )&1 )
50 
51 #define _is( x ) ( (int) ( 3.2768*( (float) x ) ) )
52 
53 #endif //have_force_feedback
54 
55 #define ALL_EFFECTS 1
56 
57 enum vseffects
58 {
59  eff_speed_damper=0, //the higher the speed, the more damped
60  eff_ab_wiggle_x, eff_ab_wiggle_y, eff_ab_jerk, //afterburner on
61  eff_ab_off_x, eff_ab_off_y, //afterburner off
62  eff_laser_jerk, eff_laser_vibrate, //laser fired
63 #if ALL_EFFECTS
64  eff_beam_on, eff_beam_off, //beam
65  eff_missile_jerk, eff_missile_vibrate, //missile
66  eff_hit_jerk, eff_hit_vibrate, //shield hits
67 #endif
68  eff_force //additional force
69 };
70 
71 #if ALL_EFFECTS
72 #define N_EFFECTS 15
73 #else
74 #define N_EFFECTS 9
75 #endif
76 
77 class ForceFeedback
78 {
79 public: ForceFeedback();
80  ~ForceFeedback();
81 
82  bool haveFF();
83 
84  void playDurationEffect( unsigned int eff_nr, bool activate );
85  void playShortEffect( unsigned int eff_nr );
86 
87  void playHit( float angle, float strength );
88  void updateForce( float angle, float strength );
89  void updateSpeedEffect( float strength );
90  void playAfterburner( bool activate );
91  void playLaser();
92 
93 private:
94  bool have_ff;
95 
96 #if HAVE_FORCE_FEEDBACK
97 private:
98  void init();
99 
100  void init_bogus( int i );
101  void playEffect( unsigned int eff_nr );
102  void stopEffect( unsigned int eff_nr );
103 
104  int device_nr;
105 
106  struct ff_effect effects[N_EFFECTS];
107  struct input_event play, stop;
108  int ff_fd;
109  unsigned long features[4];
110  int n_effects; /* Number of effects the device can play at the same time */
111 
112  double eff_last_time[N_EFFECTS];
113 
114  double min_effect_time;
115 
116  bool is_played[N_EFFECTS];
117 #endif //have_force_feedback
118 };
119 
120 #endif //_FORCE_FEEDBACK_H_
121