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d3dx9: Use float functions in D3DXQuaternionSlerp().

This commit is contained in:
Rico Schüller 2012-09-26 13:57:01 +02:00 committed by Alexandre Julliard
parent 398eb27538
commit ce319e9d53
1 changed files with 20 additions and 17 deletions
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37
dlls/d3dx9_36/math.c
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@ -1435,32 +1435,35 @@ D3DXQUATERNION* WINAPI D3DXQuaternionRotationYawPitchRoll(D3DXQUATERNION *pout,
return pout; return pout;
} }
D3DXQUATERNION* WINAPI D3DXQuaternionSlerp(D3DXQUATERNION *pout, CONST D3DXQUATERNION *pq1, CONST D3DXQUATERNION *pq2, FLOAT t) D3DXQUATERNION * WINAPI D3DXQuaternionSlerp(D3DXQUATERNION *out, const D3DXQUATERNION *q1,
const D3DXQUATERNION *q2, FLOAT t)
{ {
FLOAT dot, epsilon, temp, theta, u; FLOAT dot, temp;
TRACE("(%p, %p, %p, %f)\n", pout, pq1, pq2, t); TRACE("out %p, q1 %p, q2 %p, t %f\n", out, q1, q2, t);
epsilon = 1.0f;
temp = 1.0f - t; temp = 1.0f - t;
u = t; dot = D3DXQuaternionDot(q1, q2);
dot = D3DXQuaternionDot(pq1, pq2); if (dot < 0.0f)
if ( dot < 0.0f )
{ {
epsilon = -1.0f; t = -t;
dot = -dot; dot = -dot;
} }
if( 1.0f - dot > 0.001f )
if (1.0f - dot > 0.001f)
{ {
theta = acos(dot); FLOAT theta = acosf(dot);
temp = sin(theta * temp) / sin(theta);
u = sin(theta * u) / sin(theta); temp = sinf(theta * temp) / sinf(theta);
t = sinf(theta * t) / sinf(theta);
} }
pout->x = temp * pq1->x + epsilon * u * pq2->x;
pout->y = temp * pq1->y + epsilon * u * pq2->y; out->x = temp * q1->x + t * q2->x;
pout->z = temp * pq1->z + epsilon * u * pq2->z; out->y = temp * q1->y + t * q2->y;
pout->w = temp * pq1->w + epsilon * u * pq2->w; out->z = temp * q1->z + t * q2->z;
return pout; out->w = temp * q1->w + t * q2->w;
return out;
} }
D3DXQUATERNION* WINAPI D3DXQuaternionSquad(D3DXQUATERNION *pout, CONST D3DXQUATERNION *pq1, CONST D3DXQUATERNION *pq2, CONST D3DXQUATERNION *pq3, CONST D3DXQUATERNION *pq4, FLOAT t) D3DXQUATERNION* WINAPI D3DXQuaternionSquad(D3DXQUATERNION *pout, CONST D3DXQUATERNION *pq1, CONST D3DXQUATERNION *pq2, CONST D3DXQUATERNION *pq3, CONST D3DXQUATERNION *pq4, FLOAT t)