diff --git a/CMakeLists.txt b/CMakeLists.txt
index d3fcc57..31b84aa 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,7 +3,7 @@ cmake_policy(SET CMP0017 NEW) # need include() with .cmake
 cmake_policy(SET CMP0072 NEW) #  FindOpenGL prefers GLVND by default
 project(QAD)
 set(QAD_MAJOR    2)
-set(QAD_MINOR    27)
+set(QAD_MINOR    28)
 set(QAD_REVISION 0)
 set(QAD_SUFFIX   )
 set(QAD_COMPANY  SHS)
diff --git a/libs/piqt/piqt.h b/libs/piqt/piqt.h
index 0c38544..1079727 100644
--- a/libs/piqt/piqt.h
+++ b/libs/piqt/piqt.h
@@ -27,8 +27,11 @@
 
 #include <QColor>
 #include <QDateTime>
+#include <QGenericMatrix>
 #include <QImage>
+#include <QMatrix4x4>
 #include <QPolygonF>
+#include <QVector2D>
 #include <QVector3D>
 #if QT_VERSION_MAJOR == 5
 #  if QT_VERSION >= QT_VERSION_CHECK(5, 2, 0)
@@ -105,6 +108,60 @@ inline PIMathVectorT3d Q2PIVector3(const QVector3D & v) {
 	return PIMathVectorT3d({double(v.x()), double(v.y()), double(v.z())});
 }
 
+template<uint Rows, uint Cols = Rows, typename Type = double>
+inline QGenericMatrix<Cols, Rows, Type> PI2QMathMatrixT(const PIMathMatrixT<Rows, Cols, Type> & v) {
+	QGenericMatrix<Cols, Rows, Type> ret;
+	for (int r = 0; r < Rows; ++r)
+		for (int c = 0; c < Cols; ++c)
+			ret(r, c) = v[r][c];
+	return ret;
+}
+
+template<int Rows, int Cols = Rows, typename Type = double>
+inline PIMathMatrixT<Rows, Cols, Type> Q2PIMathMatrixT(const QGenericMatrix<Cols, Rows, Type> & v) {
+	PIMathMatrixT<Rows, Cols, Type> ret;
+	for (int r = 0; r < Rows; ++r)
+		for (int c = 0; c < Cols; ++c)
+			ret[r][c] = v(r, c);
+	return ret;
+}
+inline PIMathMatrixT<4, 4, float> Q2PIMathMatrixT(const QMatrix4x4 & v) {
+	PIMathMatrixT<4, 4, float> ret;
+	for (int r = 0; r < 4; ++r)
+		for (int c = 0; c < 4; ++c)
+			ret[r][c] = v(r, c);
+	return ret;
+}
+
+
+inline PIMathVectorT2d Q2PIMathVectorT(const QVector2D & v) {
+	return PIMathVectorT2d({v[0], v[1]});
+}
+inline PIMathVectorT2d Q2PIMathVectorT(const QPointF & v) {
+	return PIMathVectorT2d({v.x(), v.y()});
+}
+inline PIMathVectorT3d Q2PIMathVectorT(const QVector3D & v) {
+	return PIMathVectorT3d({v[0], v[1], v[2]});
+}
+inline PIMathVectorT4d Q2PIMathVectorT(const QVector4D & v) {
+	return PIMathVectorT4d({v[0], v[1], v[2], v[3]});
+}
+template<int Size, typename Type = double>
+inline PIMathVectorT<Size, double> Q2PIMathVectorT(const QGenericMatrix<1, Size, Type> & v) {
+	PIMathVectorT<Size, double> ret;
+	for (int i = 0; i < Size; ++i)
+		ret[i] = v(i, 0);
+	return ret;
+}
+template<int Size, typename Type = double>
+inline PIMathVectorT<Size, double> Q2PIMathVectorT(const QGenericMatrix<Size, 1, Type> & v) {
+	PIMathVectorT<Size, double> ret;
+	for (int i = 0; i < Size; ++i)
+		ret[i] = v(0, i);
+	return ret;
+}
+
+
 inline QPointF PI2QPoint(const PIPointd & v) {
 	return QPointF(v.x, v.y);
 }