David Adam : d3dx8: Implement D3DXQuaternionExp.
Alexandre Julliard
julliard at winehq.org
Mon Nov 26 08:16:22 CST 2007
Module: wine
Branch: master
Commit: f1bc484947b45ef0e08cbf51f1b8614baf5b587d
URL: http://source.winehq.org/git/wine.git/?a=commit;h=f1bc484947b45ef0e08cbf51f1b8614baf5b587d
Author: David Adam <David.Adam at math.cnrs.fr>
Date: Wed Nov 21 14:59:21 2007 +0100
d3dx8: Implement D3DXQuaternionExp.
---
dlls/d3dx8/d3dx8.spec | 2 +-
dlls/d3dx8/math.c | 22 ++++++++++++++++++++++
dlls/d3dx8/tests/math.c | 14 ++++++++++++++
include/d3dx8math.h | 1 +
4 files changed, 38 insertions(+), 1 deletions(-)
diff --git a/dlls/d3dx8/d3dx8.spec b/dlls/d3dx8/d3dx8.spec
index d65dce0..52fa008 100644
--- a/dlls/d3dx8/d3dx8.spec
+++ b/dlls/d3dx8/d3dx8.spec
@@ -57,7 +57,7 @@
@ stdcall D3DXQuaternionNormalize(ptr ptr)
@ stdcall D3DXQuaternionInverse(ptr ptr)
@ stdcall D3DXQuaternionLn(ptr ptr)
-@ stub D3DXQuaternionExp
+@ stdcall D3DXQuaternionExp(ptr ptr)
@ stdcall D3DXQuaternionSlerp(ptr ptr ptr long)
@ stdcall D3DXQuaternionSquad(ptr ptr ptr ptr ptr long)
@ stdcall D3DXQuaternionBaryCentric(ptr ptr ptr ptr long long)
diff --git a/dlls/d3dx8/math.c b/dlls/d3dx8/math.c
index 19d6a9f..9f7522e 100644
--- a/dlls/d3dx8/math.c
+++ b/dlls/d3dx8/math.c
@@ -588,6 +588,28 @@ D3DXQUATERNION* WINAPI D3DXQuaternionBaryCentric(D3DXQUATERNION *pout, CONST D3D
return pout;
}
+D3DXQUATERNION* WINAPI D3DXQuaternionExp(D3DXQUATERNION *pout, CONST D3DXQUATERNION *pq)
+{
+ FLOAT norm;
+
+ norm = sqrt(pq->x * pq->x + pq->y * pq->y + pq->z * pq->z);
+ if (norm )
+ {
+ pout->x = sin(norm) * pq->x / norm;
+ pout->y = sin(norm) * pq->y / norm;
+ pout->z = sin(norm) * pq->z / norm;
+ pout->w = cos(norm);
+ }
+ else
+ {
+ pout->x = 0.0f;
+ pout->y = 0.0f;
+ pout->z = 0.0f;
+ pout->w = 1.0f;
+ }
+ return pout;
+}
+
D3DXQUATERNION* WINAPI D3DXQuaternionInverse(D3DXQUATERNION *pout, CONST D3DXQUATERNION *pq)
{
D3DXQUATERNION temp;
diff --git a/dlls/d3dx8/tests/math.c b/dlls/d3dx8/tests/math.c
index 6dfe49c..b689fb7 100644
--- a/dlls/d3dx8/tests/math.c
+++ b/dlls/d3dx8/tests/math.c
@@ -595,6 +595,20 @@ static void D3X8QuaternionTest(void)
got = D3DXQuaternionDot(NULL,NULL);
ok(fabs( got - expected ) < admitted_error, "Expected: %f, Got: %f\n", expected, got);
+/*_______________D3DXQuaternionExp______________________________*/
+ expectedquat.x = -0.216382f; expectedquat.y = -0.432764f; expectedquat.z = -0.8655270f; expectedquat.w = -0.129449f;
+ D3DXQuaternionExp(&gotquat,&q);
+ expect_vec4(expectedquat,gotquat);
+ /* Test the null quaternion */
+ expectedquat.x = 0.0f; expectedquat.y = 0.0f; expectedquat.z = 0.0f; expectedquat.w = 1.0f;
+ D3DXQuaternionExp(&gotquat,&nul);
+ expect_vec4(expectedquat,gotquat);
+ /* Test the case where the norm of the quaternion is <1 */
+ Nq1.x = 0.2f; Nq1.y = 0.1f; Nq1.z = 0.3; Nq1.w= 0.9f;
+ expectedquat.x = 0.195366; expectedquat.y = 0.097683f; expectedquat.z = 0.293049f; expectedquat.w = 0.930813f;
+ D3DXQuaternionExp(&gotquat,&Nq1);
+ expect_vec4(expectedquat,gotquat);
+
/*_______________D3DXQuaternionIdentity________________*/
expectedquat.x = 0.0f; expectedquat.y = 0.0f; expectedquat.z = 0.0f; expectedquat.w = 1.0f;
D3DXQuaternionIdentity(&gotquat);
diff --git a/include/d3dx8math.h b/include/d3dx8math.h
index 6c5f18f..a799dee 100644
--- a/include/d3dx8math.h
+++ b/include/d3dx8math.h
@@ -303,6 +303,7 @@ D3DXPLANE* WINAPI D3DXPlaneNormalize(D3DXPLANE *pout, CONST D3DXPLANE *pp);
D3DXPLANE* WINAPI D3DXPlaneTransform(D3DXPLANE *pout, CONST D3DXPLANE *pplane, CONST D3DXMATRIX *pm);
D3DXQUATERNION* WINAPI D3DXQuaternionBaryCentric(D3DXQUATERNION *pout, CONST D3DXQUATERNION *pq1, CONST D3DXQUATERNION *pq2, CONST D3DXQUATERNION *pq3, FLOAT f, FLOAT g);
+D3DXQUATERNION* WINAPI D3DXQuaternionExp(D3DXQUATERNION *pout, CONST D3DXQUATERNION *pq);
D3DXQUATERNION* WINAPI D3DXQuaternionInverse(D3DXQUATERNION *pout, CONST D3DXQUATERNION *pq);
D3DXQUATERNION* WINAPI D3DXQuaternionLn(D3DXQUATERNION *pout, CONST D3DXQUATERNION *pq);
D3DXQUATERNION* WINAPI D3DXQuaternionMultiply(D3DXQUATERNION *pout, CONST D3DXQUATERNION *pq1, CONST D3DXQUATERNION *pq2);
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