diff --git a/libs/geom/include/psemek/geom/homogeneous.hpp b/libs/geom/include/psemek/geom/homogeneous.hpp
index cce0b495..6b828e90 100644
--- a/libs/geom/include/psemek/geom/homogeneous.hpp
+++ b/libs/geom/include/psemek/geom/homogeneous.hpp
@@ -62,4 +62,16 @@ namespace psemek::geom
 		return result;
 	}
 
+	template <typename T, std::size_t D>
+	matrix<T, D-1, D-1> homogeneous_to_linear(matrix<T, D, D> const & m)
+	{
+		return submatrix<0, 0, D-1, D-1>(m);
+	}
+
+	template <typename T, std::size_t D>
+	matrix<T, D-1, D> homogeneous_to_affine(matrix<T, D, D> const & m)
+	{
+		return submatrix<0, 0, D-1, D>(m);
+	}
+
 }