mirrors/HandmadeMath
1
0
Fork 0
mirror of https://github.com/HandmadeMath/HandmadeMath.git synced 2025-09-26 11:58:33 +00:00
Code Issues Packages Projects Releases Wiki Activity

Removed Unnecessary Square Root from InverseQuaternion. Closes #136

Browse Source
This commit is contained in:
strangezak
2021-08-31 09:28:02 -07:00
parent 5f816bf9b3
commit 8c18186b3b
1 changed files with 6 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
HandmadeMath.h
View File

@@ -3106,21 +3106,15 @@ COVERAGE(HMM_InverseQuaternion, 1)
hmm_quaternion HMM_PREFIX(InverseQuaternion)(hmm_quaternion Left)
{
ASSERT_COVERED(HMM_InverseQuaternion);
hmm_quaternion Conjugate;
hmm_quaternion Result;
float Norm = 0;
float NormSquared = 0;
Conjugate.X = -Left.X;
Conjugate.Y = -Left.Y;
Conjugate.Z = -Left.Z;
Conjugate.W = Left.W;
Result.X = -Left.X;
Result.Y = -Left.Y;
Result.Z = -Left.Z;
Result.W = Left.W;
Norm = HMM_PREFIX(SquareRootF)(HMM_PREFIX(DotQuaternion)(Left, Left));
NormSquared = Norm * Norm;
Result = HMM_PREFIX(DivideQuaternionF)(Conjugate, NormSquared);
Result = HMM_PREFIX(DivideQuaternionF)(Result, (HMM_PREFIX(DotQuaternion)(Left, Left)));
return (Result);
}