diff options
Diffstat (limited to 'intern/iksolver')
| -rw-r--r-- | intern/iksolver/intern/TNT/svd.h | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/intern/iksolver/intern/TNT/svd.h b/intern/iksolver/intern/TNT/svd.h index 9ca51fa2650..9ae289474a9 100644 --- a/intern/iksolver/intern/TNT/svd.h +++ b/intern/iksolver/intern/TNT/svd.h @@ -349,8 +349,9 @@ void SVD(MaTRiX &A, MaTRiX &U, VecToR &s, MaTRiX &V, VecToR &work1, VecToR &work for (j = k; j < p-1; j++) { typename MaTRiX::value_type t = hypot(f,g); - typename MaTRiX::value_type cs = f/t; - typename MaTRiX::value_type sn = g/t; + /* division by zero checks added to avoid NaN (brecht) */ + typename MaTRiX::value_type cs = (t == 0.0f)? 0.0f: f/t; + typename MaTRiX::value_type sn = (t == 0.0f)? 0.0f: g/t; if (j != k) { e[j-1] = t; } @@ -366,8 +367,9 @@ void SVD(MaTRiX &A, MaTRiX &U, VecToR &s, MaTRiX &V, VecToR &work1, VecToR &work } t = hypot(f,g); - cs = f/t; - sn = g/t; + /* division by zero checks added to avoid NaN (brecht) */ + cs = (t == 0.0f)? 0.0f: f/t; + sn = (t == 0.0f)? 0.0f: g/t; s[j] = t; f = cs*e[j] + sn*s[j+1]; s[j+1] = -sn*e[j] + cs*s[j+1]; |