1 files changed, 17 insertions, 0 deletions
diff --git a/engines/titanic/star_control/daffine.cpp b/engines/titanic/star_control/daffine.cpp
index 616042d715..283df9cbd2 100644
--- a/engines/titanic/star_control/daffine.cpp
+++ b/engines/titanic/star_control/daffine.cpp
@@ -116,6 +116,13 @@ void DAffine::setRotationMatrix(Axis axis, double angleDeg) {
 	}
 }
 
+void DAffine::rotVectAxisY(double angleDeg) {
+	_col1.rotVectAxisY(angleDeg);
+	_col2.rotVectAxisY(angleDeg);
+	_col3.rotVectAxisY(angleDeg);
+	_col4.rotVectAxisY(angleDeg);
+}
+
 DAffine DAffine::inverseTransform() const {
 	DAffine m;
 
@@ -212,4 +219,14 @@ DAffine DAffine::compose(const DAffine &m) {
 	return dm;
 }
 
+DAffine DAffine::compose2(const DAffine &m) {
+	DAffine dm;
+	dm._col1 = _col1.dAffMatrixProdVec(m);
+	dm._col2 = _col2.dAffMatrixProdVec(m);
+	dm._col3 = _col3.dAffMatrixProdVec(m);
+	dm._col4 = _col4.dAffMatrixProdVec(m);
+
+	return dm;
+}
+
 } // End of namespace Titanic