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d3drm: Implement D3DRMVectorNormalize.

This commit is contained in:
David Adam 2007-04-19 21:10:46 +02:00 committed by Alexandre Julliard
parent 5524923c07
commit 819362d0f7
3 changed files with 31 additions and 2 deletions
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2
dlls/d3drm/d3drm.spec
View File

@ -12,7 +12,7 @@
@ stdcall D3DRMVectorCrossProduct(ptr ptr ptr)
@ stdcall D3DRMVectorDotProduct(ptr ptr)
@ stdcall D3DRMVectorModulus(ptr)
@ stub D3DRMVectorNormalize
@ stdcall D3DRMVectorNormalize(ptr)
@ stub D3DRMVectorRandom
@ stub D3DRMVectorReflect
@ stub D3DRMVectorRotate

17
dlls/d3drm/math.c
View File

@ -75,6 +75,23 @@ D3DVALUE WINAPI D3DRMVectorModulus(LPD3DVECTOR v)
return result;
}
/* Normalize a vector. Returns (1,0,0) if INPUT is the NULL vector. */
LPD3DVECTOR WINAPI D3DRMVectorNormalize(LPD3DVECTOR u)
{
D3DVALUE modulus = D3DRMVectorModulus(u);
if(modulus)
{
D3DRMVectorScale(u,u,1.0/modulus);
}
else
{
u->x=1.0;
u->y=0.0;
u->z=0.0;
}
return u;
}
/* Scale a vector */
LPD3DVECTOR WINAPI D3DRMVectorScale(LPD3DVECTOR d, LPD3DVECTOR s, D3DVALUE factor)
{

14
dlls/d3drm/tests/vector.c
View File

@ -33,7 +33,7 @@
void VectorTest(void)
{
D3DVALUE mod,par;
D3DVECTOR e,r,u,v;
D3DVECTOR e,r,u,v,casnul;
u.x=2.0;u.y=2.0;u.z=1.0;
v.x=4.0;v.y=4.0;v.z=0.0;
@ -61,6 +61,18 @@ void VectorTest(void)
mod=D3DRMVectorModulus(&u);
ok((mod == 3.0), "Expected 3.0, Got %f",mod);
/*_______________________VectorNormalize___________________________*/
D3DRMVectorNormalize(&u);
e.x=2.0/3.0;e.y=2.0/3.0;e.z=1.0/3.0;
expect_vec(e,u);
/* If u is the NULL vector, MSDN says that the return vector is NULL. In fact, the returned vector is (1,0,0). The following test case prove it. */
casnul.x=0.0; casnul.y=0.0; casnul.z=0.0;
D3DRMVectorNormalize(&casnul);
e.x=1.0; e.y=0.0; e.z=0.0;
expect_vec(e,casnul);
/*_______________________VectorScale__________________________*/
par=2.5;
D3DRMVectorScale(&r,&v,par);