From 11d96829b6763799954a66b763d772b8de3b10d0 Mon Sep 17 00:00:00 2001
From: lisyarus <lisyarus@gmail.com>
Date: Tue, 21 Jul 2026 13:21:24 +0300
Subject: [PATCH] Support retrieving linear & affine matrix, translation
 vector, and affine transform from math::orthographic

---
 .../math/include/psemek/math/orthographic.hpp | 32 +++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/libs/math/include/psemek/math/orthographic.hpp b/libs/math/include/psemek/math/orthographic.hpp
index 798faefa..e518554b 100644
--- a/libs/math/include/psemek/math/orthographic.hpp
+++ b/libs/math/include/psemek/math/orthographic.hpp
@@ -5,6 +5,7 @@
 #include <psemek/math/box.hpp>
 #include <psemek/math/matrix.hpp>
 #include <psemek/math/homogeneous.hpp>
+#include <psemek/math/affine_transform.hpp>
 
 namespace psemek::math
 {
@@ -14,6 +15,8 @@ namespace psemek::math
 	{
 		using vector_type = math::vector<T, D>;
 		using point_type = math::point<T, D>;
+		using affine_matrix_type = math::matrix<T, D, D + 1>;
+		using linear_matrix_type = math::matrix<T, D, D>;
 		using homogeneous_matrix_type = math::matrix<T, D + 1, D + 1>;
 		using box_type = math::box<T, D>;
 
@@ -26,8 +29,13 @@ namespace psemek::math
 		vector_type operator() (vector_type v) const;
 		point_type operator() (point_type p) const;
 
+		affine_matrix_type affine_matrix() const;
+		linear_matrix_type linear_matrix() const;
+		vector_type translation_vector() const;
 		homogeneous_matrix_type homogeneous_matrix() const;
 
+		affine_transform<T, D, D> transform() const;
+
 		orthographic inverse() const;
 
 	private:
@@ -76,6 +84,24 @@ namespace psemek::math
 		return as_point(homogeneous_matrix() * homogeneous(p));
 	}
 
+	template <typename T, std::size_t D>
+	matrix<T, D, D + 1> orthographic<T, D>::affine_matrix() const
+	{
+		return submatrix<0, 0, D, D + 1>(homogeneous_matrix());
+	}
+
+	template <typename T, std::size_t D>
+	matrix<T, D, D> orthographic<T, D>::linear_matrix() const
+	{
+		return submatrix<0, 0, D, D>(homogeneous_matrix());
+	}
+
+	template <typename T, std::size_t D>
+	vector<T, D> orthographic<T, D>::translation_vector() const
+	{
+		return column(affine_matrix(), D);
+	}
+
 	template <typename T, std::size_t D>
 	matrix<T, D + 1, D + 1> orthographic<T, D>::homogeneous_matrix() const
 	{
@@ -92,6 +118,12 @@ namespace psemek::math
 		return m;
 	}
 
+	template <typename T, std::size_t D>
+	affine_transform<T, D, D> orthographic<T, D>::transform() const
+	{
+		return {affine_matrix()};
+	}
+
 	template <typename T, std::size_t D>
 	orthographic<T, D> orthographic<T, D>::inverse() const
 	{