sigonasr2/jmonkeyengine
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Removed cos2,sin2 and reduceAngle from FastMath as they were unused and confusing, and somehow buggy.

Browse Source 
See forum post
http://jmonkeyengine.org/forum/topic/patch-remove-fastmath-sin2cos2/#post-198276

git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@10042 75d07b2b-3a1a-0410-a2c5-0572b91ccdca
This commit is contained in:
rem..om 2012-12-23 08:58:19 +00:00
parent 8a4b204154
commit 7e43015f3c
1 changed files with 0 additions and 52 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
engine/src/core/com/jme3/math/FastMath.java
View File

@ -482,58 +482,6 @@ final public class FastMath {
return (float) Math.ceil(fValue);
}
/**
* Fast Trig functions for x86. This forces the trig functiosn to stay
* within the safe area on the x86 processor (-45 degrees to +45 degrees)
* The results may be very slightly off from what the Math and StrictMath
* trig functions give due to rounding in the angle reduction but it will be
* very very close.
*
* note: code from wiki posting on java.net by jeffpk
*/
public static float reduceSinAngle(float radians) {
radians %= TWO_PI; // put us in -2PI to +2PI space
if (Math.abs(radians) > PI) { // put us in -PI to +PI space
radians = radians - (TWO_PI);
}
if (Math.abs(radians) > HALF_PI) {// put us in -PI/2 to +PI/2 space
radians = PI - radians;
}
return radians;
}
/**
* Returns sine of an angle.
*
* note: code from wiki posting on java.net by jeffpk
*
* @param fValue
* The angle to sine, in radians.
* @return The sine of fValue.
* @see java.lang.Math#sin(double)
*/
public static float sin2(float fValue) {
fValue = reduceSinAngle(fValue); // limits angle to between -PI/2 and +PI/2
if (Math.abs(fValue) <= Math.PI / 4) {
return (float) Math.sin(fValue);
}
return (float) Math.cos(Math.PI / 2 - fValue);
}
/**
* Returns cos of an angle.
*
* @param fValue
* The angle to cosine, in radians.
* @return The cosine of fValue.
* @see java.lang.Math#cos(double)
*/
public static float cos2(float fValue) {
return sin2(fValue + HALF_PI);
}
/**
* Returns cosine of an angle. Direct call to java.lang.Math
* @see Math#cos(double)