q_shared: avoid rsqrt_fast(0) in VectorNormalizeFast() when trapping …

…float exceptions
DaemonEngine · Dec 20, 2024 · 191f4c1 · 191f4c1
1 parent f755ae2
commit 191f4c1
Showing 1 changed file with 8 additions and 2 deletions.
diff --git a/src/engine/qcommon/q_shared.h b/src/engine/qcommon/q_shared.h
@@ -693,9 +693,15 @@ inline vec_t VectorNormalize( vec3_t v )
 // that length != 0, nor does it return length
 inline void VectorNormalizeFast( vec3_t v )
 {
-	vec_t ilength = Q_rsqrt_fast( DotProduct( v, v ) );
+	vec_t length = DotProduct( v, v );
 
-	VectorScale( v, ilength, v );
+#if DAEMON_USE_FLOAT_EXCEPTIONS
+	if ( length )
+#endif
+	{
+		vec_t ilength = Q_rsqrt_fast( length );
+		VectorScale( v, ilength, v );
+	}
 }
 
 inline vec_t VectorNormalize2( const vec3_t v, vec3_t out )