patch [8/15]: Implements D3DRMVectorNormalize [try 2]
David.Adam at math.cnrs.fr
David.Adam at math.cnrs.fr
Thu Apr 19 14:10:46 CDT 2007
-------------- next part --------------
>From 35ed20106c51188027b636fe12f4d57f2d5b654b Mon Sep 17 00:00:00 2001
From: Adam <David.Adam at math.cnrs.fr>
Date: Fri, 20 Apr 2007 02:05:05 +0200
Subject: [PATCH] Implements D3DVectorNormalize with test.
---
dlls/d3drm/d3drm.spec | 2 +-
dlls/d3drm/math.c | 16 ++++++++++++++++
dlls/d3drm/tests/vector.c | 14 +++++++++++++-
3 files changed, 30 insertions(+), 2 deletions(-)
diff --git a/dlls/d3drm/d3drm.spec b/dlls/d3drm/d3drm.spec
index d534719..d5ccb2a 100644
--- a/dlls/d3drm/d3drm.spec
+++ b/dlls/d3drm/d3drm.spec
@@ -12,7 +12,7 @@
@ stdcall D3DRMVectorCrossProduct(ptr ptr ptr)
@ stdcall D3DRMVectorDotProduct(ptr)
@ stdcall D3DRMVectorModulus(ptr)
-@ stub D3DRMVectorNormalize
+@ stdcall D3DRMVectorNormalize(ptr)
@ stub D3DRMVectorRandom
@ stub D3DRMVectorReflect
@ stub D3DRMVectorRotate
diff --git a/dlls/d3drm/math.c b/dlls/d3drm/math.c
index 4c68665..5f9d85d 100644
--- a/dlls/d3drm/math.c
+++ b/dlls/d3drm/math.c
@@ -74,6 +74,22 @@ D3DVALUE WINAPI D3DRMVectorModulus(LPD3D
return result;
}
+/* Normalize a vector. Returns (1,0,0) if INPUT is the NULL vector. */
+LPD3DVECTOR WINAPI D3DRMVectorNormalize(LPD3DVECTOR u)
+{
+ D3DVALUE modulus;
+ 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)
{
diff --git a/dlls/d3drm/tests/vector.c b/dlls/d3drm/tests/vector.c
index 439ba6b..ad8cd39 100644
--- a/dlls/d3drm/tests/vector.c
+++ b/dlls/d3drm/tests/vector.c
@@ -33,7 +33,7 @@ #define expect_vec(expectedvec,gotvec) \
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);
--
1.4.2
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