Index: intern/moto/include/MT_Matrix3x3.h
===================================================================
--- intern/moto/include/MT_Matrix3x3.h	(revisión: 58344)
+++ intern/moto/include/MT_Matrix3x3.h	(copia de trabajo)
@@ -84,11 +84,18 @@
 	MT_Vector3 getColumn(int i) const {
 		return MT_Vector3(m_el[0][i], m_el[1][i], m_el[2][i]);
 	}
+
 	void setColumn(int i, const MT_Vector3& v) {
 		m_el[0][i] = v[0];
 		m_el[1][i] = v[1];
 		m_el[2][i] = v[2];
 	}
+
+	void setRow(int i, const MT_Vector3& v) {
+		m_el[i][0] = v[0];
+		m_el[i][1] = v[1];
+		m_el[i][2] = v[2];
+	}
     
     void setValue(const float *m) {
         m_el[0][0] = *m++; m_el[1][0] = *m++; m_el[2][0] = *m++; m++;
Index: intern/moto/include/MT_Vector3.h
===================================================================
--- intern/moto/include/MT_Vector3.h	(revisión: 58344)
+++ intern/moto/include/MT_Vector3.h	(copia de trabajo)
@@ -75,7 +75,7 @@
     void        normalize();
     MT_Vector3  normalized() const;
 	MT_Vector3  safe_normalized() const;
-	
+	MT_Vector3  safe_normalized_vec(MT_Vector3 vecnormalized) const;
 
     void        scale(MT_Scalar x, MT_Scalar y, MT_Scalar z); 
     MT_Vector3  scaled(MT_Scalar x, MT_Scalar y, MT_Scalar z) const; 
Index: intern/moto/include/MT_Vector3.inl
===================================================================
--- intern/moto/include/MT_Vector3.inl	(revisión: 58344)
+++ intern/moto/include/MT_Vector3.inl	(copia de trabajo)
@@ -77,6 +77,13 @@
         *this / len; 
 }
 
+GEN_INLINE MT_Vector3 MT_Vector3::safe_normalized_vec(MT_Vector3 vecnormalized) const {
+	MT_Scalar len = length();
+	return MT_fuzzyZero(len) ?
+        vecnormalized :
+        *this / len;
+}
+
 GEN_INLINE void MT_Vector3::scale(MT_Scalar xx, MT_Scalar yy, MT_Scalar zz) {
     m_co[0] *= xx; m_co[1] *= yy; m_co[2] *= zz;
 }