1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
|
/* Copyright (c) 2013, Stanislaw Halik <sthalik@misaki.pl>
* Permission to use, copy, modify, and/or distribute this
* software for any purpose with or without fee is hereby granted,
* provided that the above copyright notice and this permission
* notice appear in all copies.
*/
#include <stdlib.h>
#include <stdio.h>
#include <stdbool.h>
#include <string.h>
#include <sys/file.h>
#include <sys/mman.h>
#include <limits.h>
#include <unistd.h>
#include <math.h>
#include <XPLMPlugin.h>
#include <XPLMDataAccess.h>
#include <XPLMProcessing.h>
#include <XPLMUtilities.h>
#ifndef PLUGIN_API
#define PLUGIN_API
#endif
#pragma GCC diagnostic ignored "-Wunused-parameter"
/* using Wine name to ease things */
#define WINE_SHM_NAME "facetracknoir-wine-shm"
#define WINE_MTX_NAME "facetracknoir-wine-mtx"
#define BUILD_compat
#include "compat/export.hpp"
enum Axis {
TX = 0, TY, TZ, Yaw, Pitch, Roll
};
typedef struct shm_wrapper
{
void* mem;
int fd, size;
} shm_wrapper;
typedef struct WineSHM
{
double data[6];
int gameid, gameid2;
unsigned char table[8];
bool stop;
} WineSHM;
static shm_wrapper* lck_posix = NULL;
static WineSHM* shm_posix = NULL;
static void *view_x, *view_y, *view_z, *view_heading, *view_pitch, *view_roll;
static float offset_x, offset_y, offset_z;
static XPLMCommandRef track_toggle = NULL, translation_disable_toggle = NULL;
static int track_disabled = 1;
static int translation_disabled;
static void reinit_offset() {
offset_x = XPLMGetDataf(view_x);
offset_y = XPLMGetDataf(view_y);
offset_z = XPLMGetDataf(view_z);
}
#ifdef __GNUC__
# define unused(varname) varname __attribute__((__unused__))
#else
# define unused(varname) varname
#endif
shm_wrapper* shm_wrapper_init(const char *shmName, const char *unused(mutexName), int mapSize)
{
shm_wrapper* self = malloc(sizeof(shm_wrapper));
char shm_filename[NAME_MAX];
shm_filename[0] = '/';
strncpy(shm_filename+1, shmName, NAME_MAX-2);
shm_filename[NAME_MAX-1] = '\0';
/* (void) shm_unlink(shm_filename); */
self->fd = shm_open(shm_filename, O_RDWR | O_CREAT, 0600);
(void) ftruncate(self->fd, mapSize);
self->mem = mmap(NULL, mapSize, PROT_READ|PROT_WRITE, MAP_SHARED, self->fd, (off_t)0);
return self;
}
void shm_wrapper_free(shm_wrapper* self)
{
/*(void) shm_unlink(shm_filename);*/
(void) munmap(self->mem, self->size);
(void) close(self->fd);
free(self);
}
void shm_wrapper_lock(shm_wrapper* self)
{
flock(self->fd, LOCK_SH);
}
void shm_wrapper_unlock(shm_wrapper* self)
{
flock(self->fd, LOCK_UN);
}
float write_head_position(
float unused(inElapsedSinceLastCall),
float unused(inElapsedTimeSinceLastFlightLoop),
int unused(inCounter),
void * unused(inRefcon) )
{
if (lck_posix != NULL && shm_posix != NULL) {
shm_wrapper_lock(lck_posix);
if (!translation_disabled)
{
XPLMSetDataf(view_x, shm_posix->data[TX] * 1e-3 + offset_x);
XPLMSetDataf(view_y, shm_posix->data[TY] * 1e-3 + offset_y);
XPLMSetDataf(view_z, shm_posix->data[TZ] * 1e-3 + offset_z);
}
XPLMSetDataf(view_heading, shm_posix->data[Yaw] * 180 / M_PI);
XPLMSetDataf(view_pitch, shm_posix->data[Pitch] * 180 / M_PI);
XPLMSetDataf(view_roll, shm_posix->data[Roll] * 180 / M_PI);
shm_wrapper_unlock(lck_posix);
}
return -1.0;
}
static int TrackToggleHandler( XPLMCommandRef inCommand,
XPLMCommandPhase inPhase,
void * inRefCon )
{
if ( track_disabled )
{
//Enable
XPLMRegisterFlightLoopCallback(write_head_position, -1.0, NULL);
// Reinit the offsets when we re-enable the plugin
if ( !translation_disabled )
reinit_offset();
}
else
{
//Disable
XPLMUnregisterFlightLoopCallback(write_head_position, NULL);
}
track_disabled = !track_disabled;
return 0;
}
static int TranslationToggleHandler( XPLMCommandRef inCommand,
XPLMCommandPhase inPhase,
void * inRefCon )
{
translation_disabled = !translation_disabled;
if (!translation_disabled)
{
// Reinit the offsets when we re-enable the translations so that we can "move around"
reinit_offset();
}
return 0;
}
PLUGIN_API OTR_COMPAT_EXPORT int XPluginStart ( char * outName, char * outSignature, char * outDescription ) {
view_x = XPLMFindDataRef("sim/aircraft/view/acf_peX");
view_y = XPLMFindDataRef("sim/aircraft/view/acf_peY");
view_z = XPLMFindDataRef("sim/aircraft/view/acf_peZ");
view_heading = XPLMFindDataRef("sim/graphics/view/pilots_head_psi");
view_pitch = XPLMFindDataRef("sim/graphics/view/pilots_head_the");
view_roll = XPLMFindDataRef("sim/graphics/view/field_of_view_roll_deg");
track_toggle = XPLMCreateCommand("opentrack/toggle", "Disable/Enable head tracking");
translation_disable_toggle = XPLMCreateCommand("opentrack/toggle_translation", "Disable/Enable input translation from opentrack");
XPLMRegisterCommandHandler( track_toggle,
TrackToggleHandler,
1,
(void*)0);
XPLMRegisterCommandHandler( translation_disable_toggle,
TranslationToggleHandler,
1,
(void*)0);
if (view_x && view_y && view_z && view_heading && view_pitch && track_toggle && translation_disable_toggle) {
lck_posix = shm_wrapper_init(WINE_SHM_NAME, WINE_MTX_NAME, sizeof(WineSHM));
if (lck_posix->mem == (void*)-1) {
fprintf(stderr, "opentrack failed to init SHM!\n");
return 0;
}
shm_posix = (WineSHM*) lck_posix->mem;
memset(shm_posix, 0, sizeof(WineSHM));
strcpy(outName, "opentrack");
strcpy(outSignature, "opentrack - freetrack lives!");
strcpy(outDescription, "head tracking view control");
fprintf(stderr, "opentrack init complete\n");
return 1;
}
return 0;
}
PLUGIN_API OTR_COMPAT_EXPORT void XPluginStop ( void ) {
if (lck_posix)
{
shm_wrapper_free(lck_posix);
lck_posix = NULL;
shm_posix = NULL;
}
}
PLUGIN_API OTR_COMPAT_EXPORT void XPluginEnable ( void ) {
XPLMRegisterFlightLoopCallback(write_head_position, -1.0, NULL);
track_disabled = 0;
}
PLUGIN_API OTR_COMPAT_EXPORT void XPluginDisable ( void ) {
XPLMUnregisterFlightLoopCallback(write_head_position, NULL);
track_disabled = 1;
}
PLUGIN_API OTR_COMPAT_EXPORT void XPluginReceiveMessage(
XPLMPluginID unused(inFromWho),
int unused(inMessage),
void * unused(inParam))
{
if (inMessage == XPLM_MSG_AIRPORT_LOADED)
reinit_offset();
}
|
