diff --git a/xs/src/libslic3r/TransformationMatrix.cpp b/xs/src/libslic3r/TransformationMatrix.cpp
index 44efd5770..bbcfdb6e3 100644
--- a/xs/src/libslic3r/TransformationMatrix.cpp
+++ b/xs/src/libslic3r/TransformationMatrix.cpp
@@ -187,16 +187,26 @@ void TransformationMatrix::rotate(double q1, double q2, double q3, double q4)
     this->multiplyLeft(mat);
 }
 
-void TransformationMatrix::multiplyLeft(const TransformationMatrix &left)
+void TransformationMatrix::applyLeft(const TransformationMatrix &left)
 {
     *this = multiply(left, *this);
 }
 
-void TransformationMatrix::multiplyRight(const TransformationMatrix &right)
+TransformationMatrix TransformationMatrix::multiplyLeft(const TransformationMatrix &left)
+{
+    return multiply(left, *this);
+}
+
+void TransformationMatrix::applyRight(const TransformationMatrix &right)
 {
     *this = multiply(*this, right);
 }
 
+TransformationMatrix TransformationMatrix::multiplyRight(const TransformationMatrix &right)
+{
+    return multiply(*this, right);
+}
+
 TransformationMatrix TransformationMatrix::multiply(const TransformationMatrix &left, const TransformationMatrix &right)
 {
     TransformationMatrix trafo;
diff --git a/xs/src/libslic3r/TransformationMatrix.hpp b/xs/src/libslic3r/TransformationMatrix.hpp
index cdc4a06de..119a31bbb 100644
--- a/xs/src/libslic3r/TransformationMatrix.hpp
+++ b/xs/src/libslic3r/TransformationMatrix.hpp
@@ -71,10 +71,16 @@ public:
     void rotate(double q1, double q2, double q3, double q4);
 
     /// Multiplies the Parameter-Matrix from the left (this=left*this)
-    void multiplyLeft(const TransformationMatrix &left);
+    void applyLeft(const TransformationMatrix &left);
+
+    /// Multiplies the Parameter-Matrix from the left (out=left*this)
+    TransformationMatrix multiplyLeft(const TransformationMatrix &left);
 
     /// Multiplies the Parameter-Matrix from the right (this=this*right)
-    void multiplyRight(const TransformationMatrix &right);
+    void applyRight(const TransformationMatrix &right);
+
+    /// Multiplies the Parameter-Matrix from the right (out=this*right)
+    TransformationMatrix multiplyRight(const TransformationMatrix &right);
 
     /// Generate an eye matrix.
     static TransformationMatrix mat_eye();