Blender  V3.3
GHOST_NDOFManagerUnix.cpp
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1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 
4 #include "GHOST_System.h"
5 
6 #include <spnav.h>
7 #include <stdio.h>
8 #include <unistd.h>
9 
10 #define SPNAV_SOCK_PATH "/var/run/spnav.sock"
11 
13  : GHOST_NDOFManager(sys), m_available(false)
14 {
15  if (access(SPNAV_SOCK_PATH, F_OK) != 0) {
16 #ifdef DEBUG
17  /* annoying for official builds, just adds noise and most people don't own these */
18  puts("ndof: spacenavd not found");
19  /* This isn't a hard error, just means the user doesn't have a 3D mouse. */
20 #endif
21  }
22  else if (spnav_open() != -1) {
23  m_available = true;
24 
25  /* determine exactly which device (if any) is plugged in */
26 
27 #define MAX_LINE_LENGTH 100
28 
29  /* look for USB devices with Logitech or 3Dconnexion's vendor ID */
30  FILE *command_output = popen("lsusb | grep '046d:\\|256f:'", "r");
31  if (command_output) {
32  char line[MAX_LINE_LENGTH] = {0};
33  while (fgets(line, MAX_LINE_LENGTH, command_output)) {
34  unsigned short vendor_id = 0, product_id = 0;
35  if (sscanf(line, "Bus %*d Device %*d: ID %hx:%hx", &vendor_id, &product_id) == 2) {
36  if (setDevice(vendor_id, product_id)) {
37  break; /* stop looking once the first 3D mouse is found */
38  }
39  }
40  }
41  pclose(command_output);
42  }
43  }
44 }
45 
47 {
48  if (m_available) {
49  spnav_close();
50  }
51 }
52 
54 {
55  return m_available;
56 }
57 
58 /*
59  * Workaround for a problem where we don't enter the 'GHOST_kFinished' state,
60  * this causes any proceeding event to have a very high 'dt' (time delta),
61  * many seconds for eg, causing the view to jump.
62  *
63  * this workaround expects continuous events, if we miss a motion event,
64  * immediately send a dummy event with no motion to ensure the finished state is reached.
65  */
66 #define USE_FINISH_GLITCH_WORKAROUND
67 /* TODO: make this available on all platforms */
68 
69 #ifdef USE_FINISH_GLITCH_WORKAROUND
70 static bool motion_test_prev = false;
71 #endif
72 
74 {
75  bool anyProcessed = false;
76 
77  if (m_available) {
78  spnav_event e;
79 
80 #ifdef USE_FINISH_GLITCH_WORKAROUND
81  bool motion_test = false;
82 #endif
83 
84  while (spnav_poll_event(&e)) {
85  switch (e.type) {
86  case SPNAV_EVENT_MOTION: {
87  /* convert to blender view coords */
89  const int t[3] = {(int)e.motion.x, (int)e.motion.y, (int)-e.motion.z};
90  const int r[3] = {(int)-e.motion.rx, (int)-e.motion.ry, (int)e.motion.rz};
91 
92  updateTranslation(t, now);
93  updateRotation(r, now);
94 #ifdef USE_FINISH_GLITCH_WORKAROUND
95  motion_test = true;
96 #endif
97  break;
98  }
99  case SPNAV_EVENT_BUTTON:
101  updateButton(e.button.bnum, e.button.press, now);
102  break;
103  }
104  anyProcessed = true;
105  }
106 
107 #ifdef USE_FINISH_GLITCH_WORKAROUND
108  if (motion_test_prev == true && motion_test == false) {
110  const int v[3] = {0, 0, 0};
111 
112  updateTranslation(v, now);
113  updateRotation(v, now);
114 
115  anyProcessed = true;
116  }
117  motion_test_prev = motion_test;
118 #endif
119  }
120 
121  return anyProcessed;
122 }
static bool motion_test_prev
#define SPNAV_SOCK_PATH
#define MAX_LINE_LENGTH
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ATTR_WARN_UNUSED_RESULT const BMVert const BMEdge * e
ATTR_WARN_UNUSED_RESULT const BMVert * v
GHOST_NDOFManagerUnix(GHOST_System &)
GHOST_System & m_system
void updateButton(int button_number, bool press, uint64_t time)
void updateTranslation(const int t[3], uint64_t time)
void updateRotation(const int r[3], uint64_t time)
bool setDevice(unsigned short vendor_id, unsigned short product_id)
virtual uint64_t getMilliSeconds() const
unsigned __int64 uint64_t
Definition: stdint.h:90