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authorIra Rice <irarice@gmail.com>2008-12-07 16:53:32 -0700
committerIra Rice <irarice@gmail.com>2008-12-07 16:53:32 -0700
commitaef082e6fe4fca268f9bfe401409eb342f82e4af (patch)
tree26e9f2f2be9ad59666a4c039c7717e0e5becd3eb /src/utils
parent7f24abc455a407e84f13d75099e36db77fa8931d (diff)
parenta7c21e6f8add37af7412449742ec55c8daa8571a (diff)
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Merge commit 'a7c21e6f8add37af7412449742ec55c8daa8571a'
Conflicts: AUTHORS CMakeLists.txt ChangeLog INSTALL README aethyra.cbp configure.ac data/help/changes.txt data/help/commands.txt data/help/header.txt data/help/support.txt src/Makefile.am src/aethyra.rc src/being.cpp src/being.h src/equipment.cpp src/equipment.h src/floor_item.h src/game.cpp src/gui/buddywindow.cpp src/gui/char_select.cpp src/gui/char_server.cpp src/gui/chat.cpp src/gui/chat.h src/gui/equipmentwindow.cpp src/gui/equipmentwindow.h src/gui/gui.cpp src/gui/inventorywindow.cpp src/gui/inventorywindow.h src/gui/itemcontainer.cpp src/gui/itemcontainer.h src/gui/minimap.cpp src/gui/ministatus.cpp src/gui/newskill.cpp src/gui/npc_text.cpp src/gui/npclistdialog.h src/gui/ok_dialog.cpp src/gui/setup_video.cpp src/gui/skill.cpp src/gui/skill.h src/gui/status.h src/gui/table_model.h src/gui/updatewindow.cpp src/gui/viewport.cpp src/inventory.cpp src/inventory.h src/keyboardconfig.cpp src/keyboardconfig.h src/localplayer.cpp src/localplayer.h src/logindata.h src/main.cpp src/map.cpp src/monster.cpp src/monster.h src/net/beinghandler.cpp src/net/beinghandler.h src/net/buysellhandler.cpp src/net/equipmenthandler.cpp src/net/loginhandler.cpp src/net/loginhandler.h src/net/network.h src/net/npchandler.cpp src/net/playerhandler.cpp src/net/protocol.h src/net/tradehandler.cpp src/npc.cpp src/npc.h src/particleemitter.cpp src/particleemitterprop.h src/player.cpp src/player.h src/player_relations.cpp src/resources/imageset.cpp src/resources/imageset.h src/resources/itemdb.cpp src/resources/mapreader.cpp src/resources/monsterinfo.h src/text.cpp src/text.h src/textmanager.cpp src/textmanager.h src/tileset.h src/utils/fastsqrt.h src/utils/strprintf.cpp src/winver.h tools/tmxcopy/Makefile tools/tmxcopy/base64.cpp tools/tmxcopy/base64.h tools/tmxcopy/tostring.h Signed-off-by: Ira Rice <irarice@gmail.com>
Diffstat (limited to 'src/utils')
-rw-r--r--src/utils/fastsqrt.h48
1 files changed, 24 insertions, 24 deletions
diff --git a/src/utils/fastsqrt.h b/src/utils/fastsqrt.h
index 8da1d354..78768149 100644
--- a/src/utils/fastsqrt.h
+++ b/src/utils/fastsqrt.h
@@ -1,24 +1,24 @@
-/* A very fast function to calculate the approximate inverse square root of a
- * floating point value and a helper function that uses it for getting the
- * normal squareroot. For an explanation of the inverse squareroot function
- * read:
- * http://www.math.purdue.edu/~clomont/Math/Papers/2003/InvSqrt.pdf
- *
- * Unfortunately the original creator of this function seems to be unknown.
- */
-
-float fastInvSqrt(float x)
-{
- union { int i; float x; } tmp;
- float xhalf = 0.5f * x;
- tmp.x = x;
- tmp.i = 0x5f375a86 - (tmp.i >> 1);
- x = tmp.x;
- x = x * (1.5f - xhalf * x * x);
- return x;
-}
-
-float fastSqrt(float x)
-{
- return 1.0f / fastInvSqrt(x);
-}
+/* A very fast function to calculate the approximate inverse square root of a
+ * floating point value and a helper function that uses it for getting the
+ * normal squareroot. For an explanation of the inverse squareroot function
+ * read:
+ * http://www.math.purdue.edu/~clomont/Math/Papers/2003/InvSqrt.pdf
+ *
+ * Unfortunately the original creator of this function seems to be unknown.
+ */
+
+float fastInvSqrt(float x)
+{
+ union { int i; float x; } tmp;
+ float xhalf = 0.5f * x;
+ tmp.x = x;
+ tmp.i = 0x5f375a86 - (tmp.i >> 1);
+ x = tmp.x;
+ x = x * (1.5f - xhalf * x * x);
+ return x;
+}
+
+float fastSqrt(float x)
+{
+ return 1.0f / fastInvSqrt(x);
+}