d3dx8: Implement D3DXQuaternionBaryCentric.

dlls/d3dx8/d3dx8.spec

@@ -60,7 +60,7 @@
 @ stub D3DXQuaternionExp
 @ stdcall D3DXQuaternionSlerp(ptr ptr ptr long)
 @ stdcall D3DXQuaternionSquad(ptr ptr ptr ptr ptr long)
-@ stub D3DXQuaternionBaryCentric
+@ stdcall D3DXQuaternionBaryCentric(ptr ptr ptr ptr long long)
 @ stdcall D3DXPlaneNormalize(ptr ptr)
 @ stdcall D3DXPlaneIntersectLine(ptr ptr ptr ptr)
 @ stdcall D3DXPlaneFromPointNormal(ptr ptr ptr)

dlls/d3dx8/math.c

@@ -581,6 +581,13 @@ D3DXPLANE* WINAPI D3DXPlaneTransform(D3DXPLANE *pout, CONST D3DXPLANE *pplane, C
 
 /*_________________D3DXQUATERNION________________*/
 
+D3DXQUATERNION* WINAPI D3DXQuaternionBaryCentric(D3DXQUATERNION *pout, CONST D3DXQUATERNION *pq1, CONST D3DXQUATERNION *pq2, CONST D3DXQUATERNION *pq3, FLOAT f, FLOAT g)
+{
+    D3DXQUATERNION temp1, temp2;
+    D3DXQuaternionSlerp(pout, D3DXQuaternionSlerp(&temp1, pq1, pq2, f + g), D3DXQuaternionSlerp(&temp2, pq1, pq3, f+g), g / (f + g));
+    return pout;
+}
+
 D3DXQUATERNION* WINAPI D3DXQuaternionInverse(D3DXQUATERNION *pout, CONST D3DXQUATERNION *pq)
 {
     D3DXQUATERNION temp;

dlls/d3dx8/tests/math.c

@@ -554,7 +554,7 @@ static void D3X8QuaternionTest(void)
 {
     D3DXQUATERNION expectedquat, gotquat, nul, q, r, s, t, u;
     LPD3DXQUATERNION funcpointer;
-    FLOAT expected, got, scale;
+    FLOAT expected, got, scale, scale2;
     BOOL expectedbool, gotbool;
 
     nul.x = 0.0f; nul.y = 0.0f; nul.z = 0.0f; nul.w = 0.0f;
@@ -564,6 +564,12 @@ static void D3X8QuaternionTest(void)
     u.x = 91.0f; u.y = - 82.0f; u.z = 7.3f; u.w = -6.4f;
 
     scale = 0.3f;
+    scale2 = 0.78f;
+
+/*_______________D3DXQuaternionBaryCentric________________________*/
+    expectedquat.x = -867.444458; expectedquat.y = 87.851111f; expectedquat.z = -9.937778f; expectedquat.w = 3.235555f;
+    D3DXQuaternionBaryCentric(&gotquat,&q,&r,&t,scale,scale2);
+    expect_vec4(expectedquat,gotquat);
 
 /*_______________D3DXQuaternionConjugate________________*/
     expectedquat.x = -1.0f; expectedquat.y = -2.0f; expectedquat.z = -4.0f; expectedquat.w = 10.0f;

include/d3dx8math.h

@@ -302,6 +302,7 @@ D3DXVECTOR3* WINAPI D3DXPlaneIntersectLine(D3DXVECTOR3 *pout, CONST D3DXPLANE *p
 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 D3DXQuaternionInverse(D3DXQUATERNION *pout, CONST D3DXQUATERNION *pq);
 D3DXQUATERNION* WINAPI D3DXQuaternionMultiply(D3DXQUATERNION *pout, CONST D3DXQUATERNION *pq1, CONST D3DXQUATERNION *pq2);
 D3DXQUATERNION* WINAPI D3DXQuaternionNormalize(D3DXQUATERNION *pout, CONST D3DXQUATERNION *pq);