1 files changed, 146 insertions, 0 deletions
diff --git a/intern/ghost/intern/GHOST_NDOFManagerUnix.cpp b/intern/ghost/intern/GHOST_NDOFManagerUnix.cpp
new file mode 100644
index 00000000000..df516357c9e
--- /dev/null
+++ b/intern/ghost/intern/GHOST_NDOFManagerUnix.cpp
@@ -0,0 +1,146 @@
+/*
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * 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 the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * Contributor(s):
+ *   Mike Erwin
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+#ifdef WITH_INPUT_NDOF
+
+#include "GHOST_NDOFManagerUnix.h"
+#include "GHOST_System.h"
+
+#include <spnav.h>
+#include <stdio.h>
+
+
+GHOST_NDOFManagerUnix::GHOST_NDOFManagerUnix(GHOST_System& sys)
+    : GHOST_NDOFManager(sys),
+      m_available(false)
+{
+	if (spnav_open() != -1) {
+		m_available = true;
+
+		/* determine exactly which device (if any) is plugged in */
+
+#define MAX_LINE_LENGTH 100
+
+		/* look for USB devices with Logitech or 3Dconnexion's vendor ID */
+		FILE *command_output = popen("lsusb | grep '046d:\\|256f:'", "r");
+		if (command_output) {
+			char line[MAX_LINE_LENGTH] = {0};
+			while (fgets(line, MAX_LINE_LENGTH, command_output)) {
+				unsigned short vendor_id = 0, product_id = 0;
+				if (sscanf(line, "Bus %*d Device %*d: ID %hx:%hx", &vendor_id, &product_id) == 2)
+					if (setDevice(vendor_id, product_id)) {
+						break; /* stop looking once the first 3D mouse is found */
+					}
+			}
+			pclose(command_output);
+		}
+	}
+	else {
+#ifdef DEBUG
+		/* annoying for official builds, just adds noise and most people don't own these */
+		puts("ndof: spacenavd not found");
+		/* This isn't a hard error, just means the user doesn't have a 3D mouse. */
+#endif
+	}
+}
+
+GHOST_NDOFManagerUnix::~GHOST_NDOFManagerUnix()
+{
+	if (m_available)
+		spnav_close();
+}
+
+bool GHOST_NDOFManagerUnix::available()
+{
+	return m_available;
+}
+
+/*
+ * Workaround for a problem where we don't enter the 'GHOST_kFinished' state,
+ * this causes any proceeding event to have a very high 'dt' (time delta),
+ * many seconds for eg, causing the view to jump.
+ *
+ * this workaround expects continuous events, if we miss a motion event,
+ * immediately send a dummy event with no motion to ensure the finished state is reached.
+ */
+#define USE_FINISH_GLITCH_WORKAROUND
+/* TODO: make this available on all platforms */
+
+#ifdef USE_FINISH_GLITCH_WORKAROUND
+static bool motion_test_prev = false;
+#endif
+
+bool GHOST_NDOFManagerUnix::processEvents()
+{
+	bool anyProcessed = false;
+
+	if (m_available) {
+		spnav_event e;
+
+#ifdef USE_FINISH_GLITCH_WORKAROUND
+		bool motion_test = false;
+#endif
+
+		while (spnav_poll_event(&e)) {
+			switch (e.type) {
+				case SPNAV_EVENT_MOTION:
+				{
+					/* convert to blender view coords */
+					GHOST_TUns64 now = m_system.getMilliSeconds();
+					const short t[3] = {(short)e.motion.x, (short)e.motion.y, (short)-e.motion.z};
+					const short r[3] = {(short)-e.motion.rx, (short)-e.motion.ry, (short)e.motion.rz};
+
+					updateTranslation(t, now);
+					updateRotation(r, now);
+#ifdef USE_FINISH_GLITCH_WORKAROUND
+					motion_test = true;
+#endif
+					break;
+				}
+				case SPNAV_EVENT_BUTTON:
+					GHOST_TUns64 now = m_system.getMilliSeconds();
+					updateButton(e.button.bnum, e.button.press, now);
+					break;
+			}
+			anyProcessed = true;
+		}
+
+#ifdef USE_FINISH_GLITCH_WORKAROUND
+		if (motion_test_prev == true && motion_test == false) {
+			GHOST_TUns64 now = m_system.getMilliSeconds();
+			const short v[3] = {0, 0, 0};
+
+			updateTranslation(v, now);
+			updateRotation(v, now);
+
+			anyProcessed = true;
+		}
+		motion_test_prev = motion_test;
+#endif
+
+	}
+
+	return anyProcessed;
+}
+
+#endif /* WITH_INPUT_NDOF */