David Adam : d3dx8: Simplify D3DXQuaternionInverse.
Alexandre Julliard
julliard at winehq.org
Tue Nov 11 08:35:54 CST 2008
Module: wine
Branch: master
Commit: fea5a776299b076fc3510b53e59d4a8f4a9474ba
URL: http://source.winehq.org/git/wine.git/?a=commit;h=fea5a776299b076fc3510b53e59d4a8f4a9474ba
Author: David Adam <david.adam.cnrs at gmail.com>
Date: Tue Nov 11 14:37:23 2008 +0100
d3dx8: Simplify D3DXQuaternionInverse.
---
dlls/d3dx8/math.c | 15 ++++-----------
1 files changed, 4 insertions(+), 11 deletions(-)
diff --git a/dlls/d3dx8/math.c b/dlls/d3dx8/math.c
index 9a8c530..f41c9f4 100644
--- a/dlls/d3dx8/math.c
+++ b/dlls/d3dx8/math.c
@@ -940,14 +940,8 @@ D3DXQUATERNION* WINAPI D3DXQuaternionExp(D3DXQUATERNION *pout, CONST D3DXQUATERN
D3DXQUATERNION* WINAPI D3DXQuaternionInverse(D3DXQUATERNION *pout, CONST D3DXQUATERNION *pq)
{
- D3DXQUATERNION temp;
FLOAT norm;
- temp.x = 0.0f;
- temp.y = 0.0f;
- temp.z = 0.0f;
- temp.w = 0.0f;
-
norm = D3DXQuaternionLengthSq(pq);
if ( !norm )
{
@@ -958,11 +952,10 @@ D3DXQUATERNION* WINAPI D3DXQuaternionInverse(D3DXQUATERNION *pout, CONST D3DXQUA
}
else
{
- D3DXQuaternionConjugate(&temp, pq);
- pout->x = temp.x / norm;
- pout->y = temp.y / norm;
- pout->z = temp.z / norm;
- pout->w = temp.w / norm;
+ pout->x = -pq->x / norm;
+ pout->y = -pq->y / norm;
+ pout->z = -pq->z / norm;
+ pout->w = pq->w / norm;
}
return pout;
}
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