piwalker/dolphin
1
0
Fork 0
mirror of https://github.com/dolphin-emu/dolphin.git synced 2025-07-23 14:19:46 -06:00
Code Issues Packages Projects Releases Wiki Activity

pow is total overkill for x*x, introduce pow2 inline function to fix it.

Browse Source 
fix a warning.

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@2323 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
hrydgard
2009-02-20 22:17:26 +00:00
parent 98bf1695c1
commit d3f7349692
3 changed files with 7 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
Source/Plugins/Plugin_Wiimote/Src/EmuDynamics.cpp
View File

@ -26,6 +26,7 @@
#include "../../../Core/InputCommon/Src/XInput.h"
#include "Common.h" // Common
#include "MathUtil.h"
#include "StringUtil.h" // for ArrayToString()
#include "IniFile.h"
#include "pluginspecs_wiimote.h"
@ -133,10 +134,10 @@ void PitchDegreeToAccelerometer(float _Roll, float _Pitch, u8 &_x, u8 &_y, u8 &_
/* I got these from reversing the calculation in PitchAccelerometerToDegree() in a math program
I don't know if we can derive these from some kind of matrix or something */
float x_num = 2 * tanf(0.5f * _Roll) * z;
float x_den = powf(tanf(0.5f * _Roll), 2) - 1;
float x_den = pow2f(tanf(0.5f * _Roll)) - 1;
x = - (x_num / x_den);
float y_num = 2 * tanf(0.5f * _Pitch) * z;
float y_den = powf(tanf(0.5f * _Pitch), 2) - 1;
float y_den = pow2f(tanf(0.5f * _Pitch)) - 1;
y = - (y_num / y_den);
// =========================
}