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manual merge trunk -r 23037

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strangely vector.c was skipped in last merge from trunk.

-----------------------------------
Mathutils fix: Vector.reflect
* correct function for reflection and moving it to arithb.c
This commit is contained in:
Dalai Felinto 2009-09-08 03:25:00 +00:00
commit f7deb2046e
1 changed files with 5 additions and 25 deletions
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30
source/blender/python/generic/vector.c
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@ -354,18 +354,12 @@ static PyObject *Vector_ToTrackQuat( VectorObject * self, PyObject * args )
/*----------------------------Vector.reflect(mirror) ----------------------
return a reflected vector on the mirror normal
((2 * DotVecs(vec, mirror)) * mirror) - vec
using arithb.c would be nice here */
vec - ((2 * DotVecs(vec, mirror)) * mirror)
*/
static PyObject *Vector_Reflect( VectorObject * self, VectorObject * value )
{
float mirror[3];
float vec[3];
float reflect[4] = {0.0f, 0.0f, 0.0f, 0.0f};
float dot2;
/* for normalizing */
int i;
float norm = 0.0f;
float mirror[3], vec[3];
float reflect[3] = {0.0f, 0.0f, 0.0f};
if (!VectorObject_Check(value)) {
PyErr_SetString( PyExc_TypeError, "vec.reflect(value): expected a vector argument" );
@ -380,26 +374,12 @@ static PyObject *Vector_Reflect( VectorObject * self, VectorObject * value )
if (value->size > 2) mirror[2] = value->vec[2];
else mirror[2] = 0.0;
/* normalize, whos idea was it not to use arithb.c? :-/ */
for(i = 0; i < 3; i++) {
norm += mirror[i] * mirror[i];
}
norm = (float) sqrt(norm);
for(i = 0; i < 3; i++) {
mirror[i] /= norm;
}
/* done */
vec[0] = self->vec[0];
vec[1] = self->vec[1];
if (self->size > 2) vec[2] = self->vec[2];
else vec[2] = 0.0;
dot2 = 2 * vec[0]*mirror[0]+vec[1]*mirror[1]+vec[2]*mirror[2];
reflect[0] = (dot2 * mirror[0]) - vec[0];
reflect[1] = (dot2 * mirror[1]) - vec[1];
reflect[2] = (dot2 * mirror[2]) - vec[2];
VecReflect(reflect, vec, mirror);
return newVectorObject(reflect, self->size, Py_NEW, NULL);
}