[math] prevent division by zero in INT32_QUAT_NORMALIZE

2026-06-05 15:30:08 +08:00 · 2013-08-08 16:55:45 +02:00
parent 9822239abd
commit d15131c0f3
1 changed files with 9 additions and 7 deletions
@@ -561,10 +561,12 @@ struct Int64Vect3 {
 #define INT32_QUAT_NORMALIZE(q) {                   \
    int32_t n;                                      \
    INT32_QUAT_NORM(n, q);                          \
+    if (n > 0) {                                    \
      (q).qi = (q).qi * QUAT1_BFP_OF_REAL(1) / n;   \
      (q).qx = (q).qx * QUAT1_BFP_OF_REAL(1) / n;   \
      (q).qy = (q).qy * QUAT1_BFP_OF_REAL(1) / n;   \
      (q).qz = (q).qz * QUAT1_BFP_OF_REAL(1) / n;   \
+    }                                               \
  }

 /* _a2c = _a2b comp _b2c , aka  _a2c = _b2c * _a2b */