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Fix for error in normalize_vn_vn(), add len_squared_vn

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Campbell Barton
2014-03-31 11:17:46 +11:00
parent e001b5b33e
commit 6aa75d3b2c
3 changed files with 26 additions and 20 deletions
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18
source/blender/blenlib/intern/math_vector.c
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@@ -665,6 +665,11 @@ void axis_sort_v3(const float axis_values[3], int r_axis_order[3])
/***************************** Array Functions *******************************/
MINLINE double sqr_db(double f)
{
return f * f;
}
double dot_vn_vn(const float *array_src_a, const float *array_src_b, const int size)
{
double d = 0.0f;
@@ -677,9 +682,20 @@ double dot_vn_vn(const float *array_src_a, const float *array_src_b, const int s
return d;
}
double len_squared_vn(const float *array, const int size)
{
double d = 0.0f;
const float *array_pt = array + (size - 1);
int i = size;
while (i--) {
d += sqr_db((double)(*(array_pt--)));
}
return d;
}
float normalize_vn_vn(float *array_tar, const float *array_src, const int size)
{
double d = dot_vn_vn(array_tar, array_src, size);
double d = len_squared_vn(array_src, size);
float d_sqrt;
if (d > 1.0e-35) {
d_sqrt = (float)sqrt(d);