From c9874f30d047ec16bde263e9d078660cef9e9b65 Mon Sep 17 00:00:00 2001
From: Orange <orange-cpp@yandex.ru>
Date: Wed, 18 Feb 2026 08:15:18 +0300
Subject: [PATCH 01/10] add

---
 .../omath/engines/cry_engine/constants.hpp    | 25 +++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 include/omath/engines/cry_engine/constants.hpp

diff --git a/include/omath/engines/cry_engine/constants.hpp b/include/omath/engines/cry_engine/constants.hpp
new file mode 100644
index 00000000..70293ade
--- /dev/null
+++ b/include/omath/engines/cry_engine/constants.hpp
@@ -0,0 +1,25 @@
+//
+// Created by Vlad on 10/21/2025.
+//
+
+#pragma once
+#include "omath/linear_algebra/mat.hpp"
+#include "omath/linear_algebra/vector3.hpp"
+#include <omath/trigonometry/angle.hpp>
+#include <omath/trigonometry/view_angles.hpp>
+
+namespace omath::cry_engine
+{
+    constexpr Vector3<float> k_abs_up = {0, 0, 1};
+    constexpr Vector3<float> k_abs_right = {1, 0, 0};
+    constexpr Vector3<float> k_abs_forward = {0, 1, 0};
+
+    using Mat4X4 = Mat<4, 4, float, MatStoreType::ROW_MAJOR>;
+    using Mat3X3 = Mat<4, 4, float, MatStoreType::ROW_MAJOR>;
+    using Mat1X3 = Mat<1, 3, float, MatStoreType::ROW_MAJOR>;
+    using PitchAngle = Angle<float, -90.f, 90.f, AngleFlags::Clamped>;
+    using YawAngle = Angle<float, -180.f, 180.f, AngleFlags::Normalized>;
+    using RollAngle = Angle<float, -180.f, 180.f, AngleFlags::Normalized>;
+
+    using ViewAngles = omath::ViewAngles<PitchAngle, YawAngle, RollAngle>;
+} // namespace omath::frostbite_engine
\ No newline at end of file

From d0f3e5059a797832108d7bb8c05fee0cbc1cf338 Mon Sep 17 00:00:00 2001
From: Orange <orange-cpp@yandex.ru>
Date: Wed, 18 Feb 2026 08:20:38 +0300
Subject: [PATCH 02/10] added formulas

---
 include/omath/engines/cry_engine/formulas.hpp | 74 +++++++++++++++++++
 source/engines/cry_engine/formulas.cpp        | 42 +++++++++++
 2 files changed, 116 insertions(+)
 create mode 100644 include/omath/engines/cry_engine/formulas.hpp
 create mode 100644 source/engines/cry_engine/formulas.cpp

diff --git a/include/omath/engines/cry_engine/formulas.hpp b/include/omath/engines/cry_engine/formulas.hpp
new file mode 100644
index 00000000..46c2b765
--- /dev/null
+++ b/include/omath/engines/cry_engine/formulas.hpp
@@ -0,0 +1,74 @@
+//
+// Created by Vlad on 3/22/2025.
+//
+
+#pragma once
+#include "omath/engines/cry_engine/constants.hpp"
+
+namespace omath::cry_engine
+{
+    [[nodiscard]]
+    Vector3<float> forward_vector(const ViewAngles& angles) noexcept;
+
+    [[nodiscard]]
+    Vector3<float> right_vector(const ViewAngles& angles) noexcept;
+
+    [[nodiscard]]
+    Vector3<float> up_vector(const ViewAngles& angles) noexcept;
+
+    [[nodiscard]] Mat4X4 calc_view_matrix(const ViewAngles& angles, const Vector3<float>& cam_origin) noexcept;
+
+    [[nodiscard]]
+    Mat4X4 rotation_matrix(const ViewAngles& angles) noexcept;
+
+    [[nodiscard]]
+    Mat4X4 calc_perspective_projection_matrix(float field_of_view, float aspect_ratio, float near, float far) noexcept;
+
+    template<class FloatingType>
+    requires std::is_floating_point_v<FloatingType>
+    [[nodiscard]]
+    constexpr FloatingType units_to_centimeters(const FloatingType& units)
+    {
+        return units / static_cast<FloatingType>(100);
+    }
+
+    template<class FloatingType>
+    requires std::is_floating_point_v<FloatingType>
+    [[nodiscard]]
+    constexpr FloatingType units_to_meters(const FloatingType& units)
+    {
+        return units;
+    }
+
+    template<class FloatingType>
+    requires std::is_floating_point_v<FloatingType>
+    [[nodiscard]]
+    constexpr FloatingType units_to_kilometers(const FloatingType& units)
+    {
+        return units_to_meters(units) / static_cast<FloatingType>(1000);
+    }
+
+    template<class FloatingType>
+    requires std::is_floating_point_v<FloatingType>
+    [[nodiscard]]
+    constexpr FloatingType centimeters_to_units(const FloatingType& centimeters)
+    {
+        return centimeters * static_cast<FloatingType>(100);
+    }
+
+    template<class FloatingType>
+    requires std::is_floating_point_v<FloatingType>
+    [[nodiscard]]
+    constexpr FloatingType meters_to_units(const FloatingType& meters)
+    {
+        return meters;
+    }
+
+    template<class FloatingType>
+    requires std::is_floating_point_v<FloatingType>
+    [[nodiscard]]
+    constexpr FloatingType kilometers_to_units(const FloatingType& kilometers)
+    {
+        return meters_to_units(kilometers * static_cast<FloatingType>(1000));
+    }
+} // namespace omath::frostbite_engine
diff --git a/source/engines/cry_engine/formulas.cpp b/source/engines/cry_engine/formulas.cpp
new file mode 100644
index 00000000..14ad0491
--- /dev/null
+++ b/source/engines/cry_engine/formulas.cpp
@@ -0,0 +1,42 @@
+//
+// Created by Vlad on 3/22/2025.
+//
+#include "omath/engines/cry_engine/formulas.hpp"
+
+namespace omath::cry_engine
+{
+    Vector3<float> forward_vector(const ViewAngles& angles) noexcept
+    {
+        const auto vec = rotation_matrix(angles) * mat_column_from_vector(k_abs_forward);
+
+        return {vec.at(0, 0), vec.at(1, 0), vec.at(2, 0)};
+    }
+    Vector3<float> right_vector(const ViewAngles& angles) noexcept
+    {
+        const auto vec = rotation_matrix(angles) * mat_column_from_vector(k_abs_right);
+
+        return {vec.at(0, 0), vec.at(1, 0), vec.at(2, 0)};
+    }
+    Vector3<float> up_vector(const ViewAngles& angles) noexcept
+    {
+        const auto vec = rotation_matrix(angles) * mat_column_from_vector(k_abs_up);
+
+        return {vec.at(0, 0), vec.at(1, 0), vec.at(2, 0)};
+    }
+    Mat4X4 calc_view_matrix(const ViewAngles& angles, const Vector3<float>& cam_origin) noexcept
+    {
+        return mat_camera_view<float, MatStoreType::ROW_MAJOR>(forward_vector(angles), right_vector(angles),
+                                                               up_vector(angles), cam_origin);
+    }
+    Mat4X4 rotation_matrix(const ViewAngles& angles) noexcept
+    {
+        return mat_rotation_axis_z<float, MatStoreType::ROW_MAJOR>(angles.roll)
+               * mat_rotation_axis_y<float, MatStoreType::ROW_MAJOR>(angles.yaw)
+               * mat_rotation_axis_x<float, MatStoreType::ROW_MAJOR>(angles.pitch);
+    }
+    Mat4X4 calc_perspective_projection_matrix(const float field_of_view, const float aspect_ratio, const float near,
+                                              const float far) noexcept
+    {
+        return mat_perspective_left_handed(field_of_view, aspect_ratio, near, far);
+    }
+} // namespace omath::unity_engine

From 49319a1c7c91845c2b4286593b7a50e3c451be37 Mon Sep 17 00:00:00 2001
From: Orange <orange-cpp@yandex.ru>
Date: Thu, 19 Feb 2026 00:54:59 +0300
Subject: [PATCH 03/10] added more files

---
 .idea/editor.xml                              |  4 +-
 include/omath/engines/cry_engine/camera.hpp   | 13 ++++
 .../cry_engine/traits/camera_trait.hpp        | 24 ++++++
 .../cry_engine/traits/pred_engine_trait.hpp   | 76 +++++++++++++++++++
 source/engines/cry_engine/camera_trait.cpp    | 26 +++++++
 5 files changed, 141 insertions(+), 2 deletions(-)
 create mode 100644 include/omath/engines/cry_engine/camera.hpp
 create mode 100644 include/omath/engines/cry_engine/traits/camera_trait.hpp
 create mode 100644 include/omath/engines/cry_engine/traits/pred_engine_trait.hpp
 create mode 100644 source/engines/cry_engine/camera_trait.cpp

diff --git a/.idea/editor.xml b/.idea/editor.xml
index 2eff1aff..bce786e3 100644
--- a/.idea/editor.xml
+++ b/.idea/editor.xml
@@ -17,7 +17,7 @@
     <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppBoostFormatTooManyArgs/@EntryIndexedValue" value="WARNING" type="string" />
     <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppCStyleCast/@EntryIndexedValue" value="SUGGESTION" type="string" />
     <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppCVQualifierCanNotBeAppliedToReference/@EntryIndexedValue" value="WARNING" type="string" />
-    <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppClassCanBeFinal/@EntryIndexedValue" value="WARNING" type="string" />
+    <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppClassCanBeFinal/@EntryIndexedValue" value="DO_NOT_SHOW" type="string" />
     <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppClassIsIncomplete/@EntryIndexedValue" value="WARNING" type="string" />
     <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppClassNeedsConstructorBecauseOfUninitializedMember/@EntryIndexedValue" value="WARNING" type="string" />
     <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppClassNeverUsed/@EntryIndexedValue" value="WARNING" type="string" />
@@ -110,7 +110,7 @@
     <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppLambdaCaptureNeverUsed/@EntryIndexedValue" value="WARNING" type="string" />
     <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppLocalVariableMayBeConst/@EntryIndexedValue" value="HINT" type="string" />
     <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppLocalVariableMightNotBeInitialized/@EntryIndexedValue" value="WARNING" type="string" />
-    <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppLocalVariableWithNonTrivialDtorIsNeverUsed/@EntryIndexedValue" value="WARNING" type="string" />
+    <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppLocalVariableWithNonTrivialDtorIsNeverUsed/@EntryIndexedValue" value="DO_NOT_SHOW" type="string" />
     <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppLongFloat/@EntryIndexedValue" value="WARNING" type="string" />
     <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppMemberFunctionMayBeConst/@EntryIndexedValue" value="SUGGESTION" type="string" />
     <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppMemberFunctionMayBeStatic/@EntryIndexedValue" value="SUGGESTION" type="string" />
diff --git a/include/omath/engines/cry_engine/camera.hpp b/include/omath/engines/cry_engine/camera.hpp
new file mode 100644
index 00000000..0db847fe
--- /dev/null
+++ b/include/omath/engines/cry_engine/camera.hpp
@@ -0,0 +1,13 @@
+//
+// Created by Vlad on 3/22/2025.
+//
+
+#pragma once
+#include "omath/engines/cry_engine/constants.hpp"
+#include "omath/projection/camera.hpp"
+#include "traits/camera_trait.hpp"
+
+namespace omath::cry_engine
+{
+    using Camera = projection::Camera<Mat4X4, ViewAngles, CameraTrait>;
+} // namespace omath::cry_engine
\ No newline at end of file
diff --git a/include/omath/engines/cry_engine/traits/camera_trait.hpp b/include/omath/engines/cry_engine/traits/camera_trait.hpp
new file mode 100644
index 00000000..b760c65b
--- /dev/null
+++ b/include/omath/engines/cry_engine/traits/camera_trait.hpp
@@ -0,0 +1,24 @@
+//
+// Created by Vlad on 8/10/2025.
+//
+
+#pragma once
+#include "omath/engines/cry_engine/formulas.hpp"
+#include "omath/projection/camera.hpp"
+
+namespace omath::cry_engine
+{
+    class CameraTrait final
+    {
+    public:
+        [[nodiscard]]
+        static ViewAngles calc_look_at_angle(const Vector3<float>& cam_origin, const Vector3<float>& look_at) noexcept;
+
+        [[nodiscard]]
+        static Mat4X4 calc_view_matrix(const ViewAngles& angles, const Vector3<float>& cam_origin) noexcept;
+        [[nodiscard]]
+        static Mat4X4 calc_projection_matrix(const projection::FieldOfView& fov, const projection::ViewPort& view_port,
+                                             float near, float far) noexcept;
+    };
+
+} // namespace omath::unreal_engine
\ No newline at end of file
diff --git a/include/omath/engines/cry_engine/traits/pred_engine_trait.hpp b/include/omath/engines/cry_engine/traits/pred_engine_trait.hpp
new file mode 100644
index 00000000..353fce24
--- /dev/null
+++ b/include/omath/engines/cry_engine/traits/pred_engine_trait.hpp
@@ -0,0 +1,76 @@
+//
+// Created by Vlad on 8/6/2025.
+//
+#pragma once
+#include "omath/engines/cry_engine/formulas.hpp"
+#include "omath/projectile_prediction/projectile.hpp"
+#include "omath/projectile_prediction/target.hpp"
+#include <optional>
+
+namespace omath::cry_engine
+{
+    class PredEngineTrait final
+    {
+    public:
+        constexpr static Vector3<float> predict_projectile_position(const projectile_prediction::Projectile& projectile,
+                                                                    const float pitch, const float yaw,
+                                                                    const float time, const float gravity) noexcept
+        {
+            auto current_pos = projectile.m_origin
+                               + forward_vector({PitchAngle::from_degrees(-pitch), YawAngle::from_degrees(yaw),
+                                                 RollAngle::from_degrees(0)})
+                                         * projectile.m_launch_speed * time;
+            current_pos.z -= (gravity * projectile.m_gravity_scale) * (time * time) * 0.5f;
+
+            return current_pos;
+        }
+        [[nodiscard]]
+        static constexpr Vector3<float> predict_target_position(const projectile_prediction::Target& target,
+                                                                const float time, const float gravity) noexcept
+        {
+            auto predicted = target.m_origin + target.m_velocity * time;
+
+            if (target.m_is_airborne)
+                predicted.z -= gravity * (time * time) * 0.5f;
+
+            return predicted;
+        }
+        [[nodiscard]]
+        static float calc_vector_2d_distance(const Vector3<float>& delta) noexcept
+        {
+            return std::sqrt(delta.x * delta.x + delta.y * delta.y);
+        }
+
+        [[nodiscard]]
+        constexpr static float get_vector_height_coordinate(const Vector3<float>& vec) noexcept
+        {
+            return vec.z;
+        }
+
+        [[nodiscard]]
+        static Vector3<float> calc_viewpoint_from_angles(const projectile_prediction::Projectile& projectile,
+                                                         Vector3<float> predicted_target_position,
+                                                         const std::optional<float> projectile_pitch) noexcept
+        {
+            const auto delta2d = calc_vector_2d_distance(predicted_target_position - projectile.m_origin);
+            const auto height = delta2d * std::tan(angles::degrees_to_radians(projectile_pitch.value()));
+
+            return {predicted_target_position.x, predicted_target_position.y, projectile.m_origin.z + height};
+        }
+        // Due to specification of maybe_calculate_projectile_launch_pitch_angle, pitch angle must be:
+        // 89 look up, -89 look down
+        [[nodiscard]]
+        static float calc_direct_pitch_angle(const Vector3<float>& origin, const Vector3<float>& view_to) noexcept
+        {
+            const auto direction = (view_to - origin).normalized();
+            return angles::radians_to_degrees(std::asin(direction.z));
+        }
+        [[nodiscard]]
+        static float calc_direct_yaw_angle(const Vector3<float>& origin, const Vector3<float>& view_to) noexcept
+        {
+            const auto direction = (view_to - origin).normalized();
+
+            return angles::radians_to_degrees(std::atan2(direction.y, direction.z));
+        };
+    };
+} // namespace omath::unity_engine
diff --git a/source/engines/cry_engine/camera_trait.cpp b/source/engines/cry_engine/camera_trait.cpp
new file mode 100644
index 00000000..63c1e019
--- /dev/null
+++ b/source/engines/cry_engine/camera_trait.cpp
@@ -0,0 +1,26 @@
+//
+// Created by Vlad on 8/11/2025.
+//
+#include "omath/engines/cry_engine/traits/camera_trait.hpp"
+
+namespace omath::cry_engine
+{
+
+    ViewAngles CameraTrait::calc_look_at_angle(const Vector3<float>& cam_origin, const Vector3<float>& look_at) noexcept
+    {
+        const auto direction = (look_at - cam_origin).normalized();
+
+        return {PitchAngle::from_radians(-std::asin(direction.z)),
+                YawAngle::from_radians(std::atan2(direction.y, direction.x)), RollAngle::from_radians(0.f)};
+    }
+    Mat4X4 CameraTrait::calc_view_matrix(const ViewAngles& angles, const Vector3<float>& cam_origin) noexcept
+    {
+        return cry_engine::calc_view_matrix(angles, cam_origin);
+    }
+    Mat4X4 CameraTrait::calc_projection_matrix(const projection::FieldOfView& fov,
+                                               const projection::ViewPort& view_port, const float near,
+                                               const float far) noexcept
+    {
+        return calc_perspective_projection_matrix(fov.as_degrees(), view_port.aspect_ratio(), near, far);
+    }
+} // namespace omath::unity_engine
\ No newline at end of file

From 02d909f77df5da297abf8352b7d77384b6e39f2a Mon Sep 17 00:00:00 2001
From: Orange <orange-cpp@yandex.ru>
Date: Thu, 19 Feb 2026 01:06:08 +0300
Subject: [PATCH 04/10] added mesh trait

---
 .../engines/cry_engine/traits/mesh_trait.hpp  | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 include/omath/engines/cry_engine/traits/mesh_trait.hpp

diff --git a/include/omath/engines/cry_engine/traits/mesh_trait.hpp b/include/omath/engines/cry_engine/traits/mesh_trait.hpp
new file mode 100644
index 00000000..200c0687
--- /dev/null
+++ b/include/omath/engines/cry_engine/traits/mesh_trait.hpp
@@ -0,0 +1,19 @@
+//
+// Created by Vladislav on 09.11.2025.
+//
+#pragma once
+#include <omath/engines/cry_engine/constants.hpp>
+#include <omath/engines/cry_engine/formulas.hpp>
+
+namespace omath::cry_engine
+{
+    class MeshTrait final
+    {
+    public:
+        [[nodiscard]]
+        static Mat4X4 rotation_matrix(const ViewAngles& rotation)
+        {
+            return cry_engine::rotation_matrix(rotation);
+        }
+    };
+} // namespace omath::cry_engine
\ No newline at end of file

From 800082e4b3f1c12840909b1ae7b04012935d8aed Mon Sep 17 00:00:00 2001
From: Orange <orange-cpp@yandex.ru>
Date: Thu, 19 Feb 2026 06:35:08 +0300
Subject: [PATCH 05/10] added mesh

---
 include/omath/engines/cry_engine/mesh.hpp | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 include/omath/engines/cry_engine/mesh.hpp

diff --git a/include/omath/engines/cry_engine/mesh.hpp b/include/omath/engines/cry_engine/mesh.hpp
new file mode 100644
index 00000000..9695f0c7
--- /dev/null
+++ b/include/omath/engines/cry_engine/mesh.hpp
@@ -0,0 +1,12 @@
+//
+// Created by Vladislav on 09.11.2025.
+//
+#pragma once
+#include "constants.hpp"
+#include "omath/3d_primitives/mesh.hpp"
+#include "traits/mesh_trait.hpp"
+
+namespace omath::cry_engine
+{
+    using Mesh = primitives::Mesh<Mat4X4, ViewAngles, MeshTrait>;
+}
\ No newline at end of file

From e935155022f128b42f15ba146311ff631b25c012 Mon Sep 17 00:00:00 2001
From: Orange <orange-cpp@yandex.ru>
Date: Thu, 19 Feb 2026 07:47:23 +0300
Subject: [PATCH 06/10] improved tests

---
 include/omath/linear_algebra/vector2.hpp     |  6 ++
 include/omath/linear_algebra/vector3.hpp     | 11 +++-
 include/omath/linear_algebra/vector4.hpp     | 10 ++-
 source/engines/cry_engine/camera_trait.cpp   |  4 +-
 source/engines/cry_engine/formulas.cpp       |  4 +-
 tests/engines/unit_test_cry_engine.cpp       | 66 +++++++++++++++++++
 tests/engines/unit_test_frostbite_engine.cpp | 54 +++++++++++++++-
 tests/engines/unit_test_iw_engine.cpp        | 57 +++++++++++++++++
 tests/engines/unit_test_open_gl.cpp          | 57 +++++++++++++++++
 tests/engines/unit_test_source_engine.cpp    | 57 +++++++++++++++++
 tests/engines/unit_test_unity_engine.cpp     | 67 +++++++++++++++++++-
 tests/engines/unit_test_unreal_engine.cpp    | 56 ++++++++++++++++
 12 files changed, 438 insertions(+), 11 deletions(-)
 create mode 100644 tests/engines/unit_test_cry_engine.cpp

diff --git a/include/omath/linear_algebra/vector2.hpp b/include/omath/linear_algebra/vector2.hpp
index 2ee37503..51d30791 100644
--- a/include/omath/linear_algebra/vector2.hpp
+++ b/include/omath/linear_algebra/vector2.hpp
@@ -220,6 +220,12 @@ namespace omath
         {
             return std::make_tuple(x, y);
         }
+
+        [[nodiscard]]
+        constexpr std::array<Type, 2> as_array() const noexcept
+        {
+            return {x, y};
+        }
 #ifdef OMATH_IMGUI_INTEGRATION
         [[nodiscard]]
         constexpr ImVec2 to_im_vec2() const noexcept
diff --git a/include/omath/linear_algebra/vector3.hpp b/include/omath/linear_algebra/vector3.hpp
index ab481f2c..2845ff77 100644
--- a/include/omath/linear_algebra/vector3.hpp
+++ b/include/omath/linear_algebra/vector3.hpp
@@ -4,8 +4,8 @@
 
 #pragma once
 
-#include "omath/trigonometry/angle.hpp"
 #include "omath/linear_algebra/vector2.hpp"
+#include "omath/trigonometry/angle.hpp"
 #include <cstdint>
 #include <expected>
 #include <functional>
@@ -233,7 +233,8 @@ namespace omath
             return Angle<float, 0.f, 180.f, AngleFlags::Clamped>::from_radians(std::acos(dot(other) / bottom));
         }
 
-        [[nodiscard]] bool is_perpendicular(const Vector3& other, Type epsilon = static_cast<Type>(0.0001)) const noexcept
+        [[nodiscard]] bool is_perpendicular(const Vector3& other,
+                                            Type epsilon = static_cast<Type>(0.0001)) const noexcept
         {
             if (const auto angle = angle_between(other))
                 return std::abs(angle->as_degrees() - static_cast<Type>(90)) <= epsilon;
@@ -274,6 +275,12 @@ namespace omath
         {
             return length() >= other.length();
         }
+
+        [[nodiscard]]
+        constexpr std::array<Type, 3> as_array() const noexcept
+        {
+            return {this->x, this->y, z};
+        }
     };
 } // namespace omath
 
diff --git a/include/omath/linear_algebra/vector4.hpp b/include/omath/linear_algebra/vector4.hpp
index f045df9a..14e20678 100644
--- a/include/omath/linear_algebra/vector4.hpp
+++ b/include/omath/linear_algebra/vector4.hpp
@@ -3,8 +3,8 @@
 //
 #pragma once
 
-#include <algorithm>
 #include "omath/linear_algebra/vector3.hpp"
+#include <algorithm>
 
 namespace omath
 {
@@ -183,6 +183,12 @@ namespace omath
             return length() >= other.length();
         }
 
+        [[nodiscard]]
+        constexpr std::array<Type, 4> as_array() const noexcept
+        {
+            return {this->x, this->y, this->z, w};
+        }
+
 #ifdef OMATH_IMGUI_INTEGRATION
         [[nodiscard]]
         constexpr ImVec4 to_im_vec4() const noexcept
@@ -200,7 +206,7 @@ namespace omath
             return {static_cast<Type>(other.x), static_cast<Type>(other.y), static_cast<Type>(other.z)};
         }
 #endif
-};
+    };
 } // namespace omath
 
 template<> struct std::hash<omath::Vector4<float>>
diff --git a/source/engines/cry_engine/camera_trait.cpp b/source/engines/cry_engine/camera_trait.cpp
index 63c1e019..ac912f8a 100644
--- a/source/engines/cry_engine/camera_trait.cpp
+++ b/source/engines/cry_engine/camera_trait.cpp
@@ -10,8 +10,8 @@ namespace omath::cry_engine
     {
         const auto direction = (look_at - cam_origin).normalized();
 
-        return {PitchAngle::from_radians(-std::asin(direction.z)),
-                YawAngle::from_radians(std::atan2(direction.y, direction.x)), RollAngle::from_radians(0.f)};
+        return {PitchAngle::from_radians(std::asin(direction.z)),
+                YawAngle::from_radians(-std::atan2(direction.x, direction.y)), RollAngle::from_radians(0.f)};
     }
     Mat4X4 CameraTrait::calc_view_matrix(const ViewAngles& angles, const Vector3<float>& cam_origin) noexcept
     {
diff --git a/source/engines/cry_engine/formulas.cpp b/source/engines/cry_engine/formulas.cpp
index 14ad0491..605b3d03 100644
--- a/source/engines/cry_engine/formulas.cpp
+++ b/source/engines/cry_engine/formulas.cpp
@@ -30,8 +30,8 @@ namespace omath::cry_engine
     }
     Mat4X4 rotation_matrix(const ViewAngles& angles) noexcept
     {
-        return mat_rotation_axis_z<float, MatStoreType::ROW_MAJOR>(angles.roll)
-               * mat_rotation_axis_y<float, MatStoreType::ROW_MAJOR>(angles.yaw)
+        return mat_rotation_axis_z<float, MatStoreType::ROW_MAJOR>(angles.yaw)
+               * mat_rotation_axis_y<float, MatStoreType::ROW_MAJOR>(angles.roll)
                * mat_rotation_axis_x<float, MatStoreType::ROW_MAJOR>(angles.pitch);
     }
     Mat4X4 calc_perspective_projection_matrix(const float field_of_view, const float aspect_ratio, const float near,
diff --git a/tests/engines/unit_test_cry_engine.cpp b/tests/engines/unit_test_cry_engine.cpp
new file mode 100644
index 00000000..9c446cdd
--- /dev/null
+++ b/tests/engines/unit_test_cry_engine.cpp
@@ -0,0 +1,66 @@
+//
+// Created by Vladislav on 19.02.2026.
+//
+#include <gtest/gtest.h>
+#include <omath/engines/cry_engine/camera.hpp>
+#include <omath/engines/cry_engine/constants.hpp>
+#include <omath/engines/cry_engine/formulas.hpp>
+#include <random>
+#include <ranges>
+
+using namespace omath;
+TEST(unit_test_cry_engine, look_at_forward)
+{
+    const auto angles = cry_engine::CameraTrait::calc_look_at_angle({}, cry_engine::k_abs_forward);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = cry_engine::forward_vector(angles);
+    for (const auto& [result, etalon] : std::views::zip(dir_vector.as_array(), cry_engine::k_abs_forward.as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+TEST(unit_test_cry_engine, look_at_right)
+{
+    const auto angles = cry_engine::CameraTrait::calc_look_at_angle({}, cry_engine::k_abs_right);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = cry_engine::forward_vector(angles);
+    for (const auto& [result, etalon] : std::views::zip(dir_vector.as_array(), cry_engine::k_abs_right.as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+TEST(unit_test_cry_engine, look_at_up)
+{
+    const auto angles = cry_engine::CameraTrait::calc_look_at_angle({}, cry_engine::k_abs_right);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = cry_engine::forward_vector(angles);
+    for (const auto& [result, etalon] : std::views::zip(dir_vector.as_array(), cry_engine::k_abs_right.as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+
+TEST(unit_test_cry_engine, look_at_back)
+{
+    const auto angles = cry_engine::CameraTrait::calc_look_at_angle({}, -cry_engine::k_abs_forward);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = cry_engine::forward_vector(angles);
+    for (const auto& [result, etalon] : std::views::zip(dir_vector.as_array(), (-cry_engine::k_abs_forward).as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+TEST(unit_test_cry_engine, look_at_left)
+{
+    const auto angles = cry_engine::CameraTrait::calc_look_at_angle({}, -cry_engine::k_abs_right);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = cry_engine::forward_vector(angles);
+    for (const auto& [result, etalon] : std::views::zip(dir_vector.as_array(), (-cry_engine::k_abs_right).as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+TEST(unit_test_cry_engine, look_at_down)
+{
+    const auto angles = cry_engine::CameraTrait::calc_look_at_angle({}, -cry_engine::k_abs_up);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = cry_engine::forward_vector(angles);
+    for (const auto& [result, etalon] : std::views::zip(dir_vector.as_array(), (-cry_engine::k_abs_up).as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
\ No newline at end of file
diff --git a/tests/engines/unit_test_frostbite_engine.cpp b/tests/engines/unit_test_frostbite_engine.cpp
index 7f6a6f3b..5a2ee167 100644
--- a/tests/engines/unit_test_frostbite_engine.cpp
+++ b/tests/engines/unit_test_frostbite_engine.cpp
@@ -7,6 +7,7 @@
 #include <omath/engines/frostbite_engine/formulas.hpp>
 #include <print>
 #include <random>
+#include <ranges>
 
 TEST(unit_test_frostbite_engine, UnitsToCentimeters_BasicValues)
 {
@@ -352,4 +353,55 @@ TEST(unit_test_frostbite_engine, loook_at_random_z_axis)
             failed_points++;
     }
     EXPECT_LE(failed_points, 100);
-}
\ No newline at end of file
+}
+TEST(unit_test_frostbite_engine, look_at_right)
+{
+    const auto angles = omath::frostbite_engine::CameraTrait::calc_look_at_angle({}, omath::frostbite_engine::k_abs_right);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::frostbite_engine::forward_vector(angles);
+    for (const auto& [result, etalon] :
+         std::views::zip(dir_vector.as_array(), omath::frostbite_engine::k_abs_right.as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+TEST(unit_test_frostbite_engine, look_at_up)
+{
+    const auto angles = omath::frostbite_engine::CameraTrait::calc_look_at_angle({}, omath::frostbite_engine::k_abs_right);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::frostbite_engine::forward_vector(angles);
+    for (const auto& [result, etalon] :
+         std::views::zip(dir_vector.as_array(), omath::frostbite_engine::k_abs_right.as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+
+TEST(unit_test_frostbite_engine, look_at_back)
+{
+    const auto angles = omath::frostbite_engine::CameraTrait::calc_look_at_angle({}, -omath::frostbite_engine::k_abs_forward);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::frostbite_engine::forward_vector(angles);
+    for (const auto& [result, etalon] :
+         std::views::zip(dir_vector.as_array(), (-omath::frostbite_engine::k_abs_forward).as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+TEST(unit_test_frostbite_engine, look_at_left)
+{
+    const auto angles = omath::frostbite_engine::CameraTrait::calc_look_at_angle({}, -omath::frostbite_engine::k_abs_right);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::frostbite_engine::forward_vector(angles);
+    for (const auto& [result, etalon] :
+         std::views::zip(dir_vector.as_array(), (-omath::frostbite_engine::k_abs_right).as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+TEST(unit_test_frostbite_engine, look_at_down)
+{
+    const auto angles = omath::frostbite_engine::CameraTrait::calc_look_at_angle({}, -omath::frostbite_engine::k_abs_up);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::frostbite_engine::forward_vector(angles);
+    for (const auto& [result, etalon] :
+         std::views::zip(dir_vector.as_array(), (-omath::frostbite_engine::k_abs_up).as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
diff --git a/tests/engines/unit_test_iw_engine.cpp b/tests/engines/unit_test_iw_engine.cpp
index ed274578..44f2d381 100644
--- a/tests/engines/unit_test_iw_engine.cpp
+++ b/tests/engines/unit_test_iw_engine.cpp
@@ -6,6 +6,7 @@
 #include <omath/engines/iw_engine/constants.hpp>
 #include <omath/engines/iw_engine/formulas.hpp>
 #include <random>
+#include <ranges>
 
 TEST(unit_test_iw_engine, ForwardVector)
 {
@@ -223,4 +224,60 @@ TEST(unit_test_iw_engine, loook_at_random_z_axis)
             failed_points++;
     }
     EXPECT_LE(failed_points, 100);
+}
+TEST(unit_test_iw_engine, look_at_forward)
+{
+    const auto angles = omath::iw_engine::CameraTrait::calc_look_at_angle({}, omath::iw_engine::k_abs_forward);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::iw_engine::forward_vector(angles);
+    for (const auto& [result, etalon] : std::views::zip(dir_vector.as_array(), omath::iw_engine::k_abs_forward.as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+TEST(unit_test_iw_engine, look_at_right)
+{
+    const auto angles = omath::iw_engine::CameraTrait::calc_look_at_angle({}, omath::iw_engine::k_abs_right);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::iw_engine::forward_vector(angles);
+    for (const auto& [result, etalon] : std::views::zip(dir_vector.as_array(), omath::iw_engine::k_abs_right.as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+TEST(unit_test_iw_engine, look_at_up)
+{
+    const auto angles = omath::iw_engine::CameraTrait::calc_look_at_angle({}, omath::iw_engine::k_abs_right);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::iw_engine::forward_vector(angles);
+    for (const auto& [result, etalon] : std::views::zip(dir_vector.as_array(), omath::iw_engine::k_abs_right.as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+
+TEST(unit_test_iw_engine, look_at_back)
+{
+    const auto angles = omath::iw_engine::CameraTrait::calc_look_at_angle({}, -omath::iw_engine::k_abs_forward);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::iw_engine::forward_vector(angles);
+    for (const auto& [result, etalon] : std::views::zip(dir_vector.as_array(), (-omath::iw_engine::k_abs_forward).as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+TEST(unit_test_iw_engine, look_at_left)
+{
+    const auto angles = omath::iw_engine::CameraTrait::calc_look_at_angle({}, -omath::iw_engine::k_abs_right);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::iw_engine::forward_vector(angles);
+    for (const auto& [result, etalon] : std::views::zip(dir_vector.as_array(), (-omath::iw_engine::k_abs_right).as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+TEST(unit_test_iw_engine, look_at_down)
+{
+    const auto angles = omath::iw_engine::CameraTrait::calc_look_at_angle({}, -omath::iw_engine::k_abs_up);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::iw_engine::forward_vector(angles);
+    EXPECT_NEAR(dir_vector.z, -0.99984f, 0.0001f);
+    EXPECT_NEAR(dir_vector.x,- 0.017f, 0.01f);
+    EXPECT_NEAR(dir_vector.y, 0.f, 0.001f);
 }
\ No newline at end of file
diff --git a/tests/engines/unit_test_open_gl.cpp b/tests/engines/unit_test_open_gl.cpp
index eb8a8f94..f784e345 100644
--- a/tests/engines/unit_test_open_gl.cpp
+++ b/tests/engines/unit_test_open_gl.cpp
@@ -6,6 +6,7 @@
 #include <omath/engines/opengl_engine/constants.hpp>
 #include <omath/engines/opengl_engine/formulas.hpp>
 #include <random>
+#include <ranges>
 
 TEST(unit_test_opengl, UnitsToCentimeters_BasicValues)
 {
@@ -337,4 +338,60 @@ TEST(unit_test_opengl_engine, loook_at_random_z_axis)
             failed_points++;
     }
     EXPECT_LE(failed_points, 100);
+}
+
+TEST(unit_test_opengl_engine, look_at_forward)
+{
+    const auto angles = omath::opengl_engine::CameraTrait::calc_look_at_angle({}, omath::opengl_engine::k_abs_forward);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::opengl_engine::forward_vector(angles);
+    for (const auto& [result, etalon] : std::views::zip(dir_vector.as_array(), omath::opengl_engine::k_abs_forward.as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+TEST(unit_test_opengl_engine, look_at_right)
+{
+    const auto angles = omath::opengl_engine::CameraTrait::calc_look_at_angle({}, omath::opengl_engine::k_abs_right);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::opengl_engine::forward_vector(angles);
+    for (const auto& [result, etalon] : std::views::zip(dir_vector.as_array(), omath::opengl_engine::k_abs_right.as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+TEST(unit_test_opengl_engine, look_at_up)
+{
+    const auto angles = omath::opengl_engine::CameraTrait::calc_look_at_angle({}, omath::opengl_engine::k_abs_right);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::opengl_engine::forward_vector(angles);
+    for (const auto& [result, etalon] : std::views::zip(dir_vector.as_array(), omath::opengl_engine::k_abs_right.as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+
+TEST(unit_test_opengl_engine, look_at_back)
+{
+    const auto angles = omath::opengl_engine::CameraTrait::calc_look_at_angle({}, -omath::opengl_engine::k_abs_forward);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::opengl_engine::forward_vector(angles);
+    for (const auto& [result, etalon] : std::views::zip(dir_vector.as_array(), (-omath::opengl_engine::k_abs_forward).as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+TEST(unit_test_opengl_engine, look_at_left)
+{
+    const auto angles = omath::opengl_engine::CameraTrait::calc_look_at_angle({}, -omath::opengl_engine::k_abs_right);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::opengl_engine::forward_vector(angles);
+    for (const auto& [result, etalon] : std::views::zip(dir_vector.as_array(), (-omath::opengl_engine::k_abs_right).as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+TEST(unit_test_opengl_engine, look_at_down)
+{
+    const auto angles = omath::opengl_engine::CameraTrait::calc_look_at_angle({}, -omath::opengl_engine::k_abs_up);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::opengl_engine::forward_vector(angles);
+    for (const auto& [result, etalon] : std::views::zip(dir_vector.as_array(), (-omath::opengl_engine::k_abs_up).as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
 }
\ No newline at end of file
diff --git a/tests/engines/unit_test_source_engine.cpp b/tests/engines/unit_test_source_engine.cpp
index 4e3510fa..f311185c 100644
--- a/tests/engines/unit_test_source_engine.cpp
+++ b/tests/engines/unit_test_source_engine.cpp
@@ -6,6 +6,7 @@
 #include <omath/engines/source_engine/constants.hpp>
 #include <omath/engines/source_engine/formulas.hpp>
 #include <random>
+#include <ranges>
 
 TEST(unit_test_source_engine_units, HammerUnitsToCentimeters_BasicValues)
 {
@@ -365,4 +366,60 @@ TEST(unit_test_source_engine, loook_at_random_z_axis)
             failed_points++;
     }
     EXPECT_LE(failed_points, 100);
+}
+TEST(unit_test_source_engine, look_at_forward)
+{
+    const auto angles = omath::source_engine::CameraTrait::calc_look_at_angle({}, omath::source_engine::k_abs_forward);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::source_engine::forward_vector(angles);
+    for (const auto& [result, etalon] : std::views::zip(dir_vector.as_array(), omath::source_engine::k_abs_forward.as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+TEST(unit_test_source_engine, look_at_right)
+{
+    const auto angles = omath::source_engine::CameraTrait::calc_look_at_angle({}, omath::source_engine::k_abs_right);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::source_engine::forward_vector(angles);
+    for (const auto& [result, etalon] : std::views::zip(dir_vector.as_array(), omath::source_engine::k_abs_right.as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+TEST(unit_test_source_engine, look_at_up)
+{
+    const auto angles = omath::source_engine::CameraTrait::calc_look_at_angle({}, omath::source_engine::k_abs_right);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::source_engine::forward_vector(angles);
+    for (const auto& [result, etalon] : std::views::zip(dir_vector.as_array(), omath::source_engine::k_abs_right.as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+
+TEST(unit_test_source_engine, look_at_back)
+{
+    const auto angles = omath::source_engine::CameraTrait::calc_look_at_angle({}, -omath::source_engine::k_abs_forward);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::source_engine::forward_vector(angles);
+    for (const auto& [result, etalon] : std::views::zip(dir_vector.as_array(), (-omath::source_engine::k_abs_forward).as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+TEST(unit_test_source_engine, look_at_left)
+{
+    const auto angles = omath::source_engine::CameraTrait::calc_look_at_angle({}, -omath::source_engine::k_abs_right);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::source_engine::forward_vector(angles);
+    for (const auto& [result, etalon] : std::views::zip(dir_vector.as_array(), (-omath::source_engine::k_abs_right).as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+TEST(unit_test_source_engine, look_at_down)
+{
+    const auto angles = omath::source_engine::CameraTrait::calc_look_at_angle({}, -omath::source_engine::k_abs_up);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::source_engine::forward_vector(angles);
+    EXPECT_NEAR(dir_vector.z, -0.99984f, 0.0001f);
+    EXPECT_NEAR(dir_vector.x,- 0.017f, 0.01f);
+    EXPECT_NEAR(dir_vector.y, 0.f, 0.001f);
 }
\ No newline at end of file
diff --git a/tests/engines/unit_test_unity_engine.cpp b/tests/engines/unit_test_unity_engine.cpp
index ac577653..6621349f 100644
--- a/tests/engines/unit_test_unity_engine.cpp
+++ b/tests/engines/unit_test_unity_engine.cpp
@@ -7,6 +7,7 @@
 #include <omath/engines/unity_engine/formulas.hpp>
 #include <print>
 #include <random>
+#include <ranges>
 
 TEST(unit_test_unity_engine, UnitsToCentimeters_BasicValues)
 {
@@ -207,7 +208,8 @@ TEST(unit_test_unity_engine, Project)
     constexpr auto fov = omath::projection::FieldOfView::from_degrees(60.f);
 
     const auto cam = omath::unity_engine::Camera({0, 0, 0}, {}, {1280.f, 720.f}, fov, 0.03f, 1000.f);
-    const auto proj = cam.world_to_screen<omath::unity_engine::Camera::ScreenStart::BOTTOM_LEFT_CORNER>({10.f, 3, 10.f});
+    const auto proj =
+            cam.world_to_screen<omath::unity_engine::Camera::ScreenStart::BOTTOM_LEFT_CORNER>({10.f, 3, 10.f});
 
     EXPECT_NEAR(proj->x, 1263.538, 0.001f);
     EXPECT_NEAR(proj->y, 547.061f, 0.001f);
@@ -353,4 +355,65 @@ TEST(unit_test_unity_engine, loook_at_random_z_axis)
             failed_points++;
     }
     EXPECT_LE(failed_points, 100);
-}
\ No newline at end of file
+}
+TEST(unit_test_unity_engine, look_at_forward)
+{
+    const auto angles = omath::unity_engine::CameraTrait::calc_look_at_angle({}, omath::unity_engine::k_abs_forward);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::unity_engine::forward_vector(angles);
+    for (const auto& [result, etalon] :
+         std::views::zip(dir_vector.as_array(), omath::unity_engine::k_abs_forward.as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+TEST(unit_test_unity_engine, look_at_right)
+{
+    const auto angles = omath::unity_engine::CameraTrait::calc_look_at_angle({}, omath::unity_engine::k_abs_right);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::unity_engine::forward_vector(angles);
+    for (const auto& [result, etalon] :
+         std::views::zip(dir_vector.as_array(), omath::unity_engine::k_abs_right.as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+TEST(unit_test_unity_engine, look_at_up)
+{
+    const auto angles = omath::unity_engine::CameraTrait::calc_look_at_angle({}, omath::unity_engine::k_abs_right);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::unity_engine::forward_vector(angles);
+    for (const auto& [result, etalon] :
+         std::views::zip(dir_vector.as_array(), omath::unity_engine::k_abs_right.as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+
+TEST(unit_test_unity_engine, look_at_back)
+{
+    const auto angles = omath::unity_engine::CameraTrait::calc_look_at_angle({}, -omath::unity_engine::k_abs_forward);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::unity_engine::forward_vector(angles);
+    for (const auto& [result, etalon] :
+         std::views::zip(dir_vector.as_array(), (-omath::unity_engine::k_abs_forward).as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+TEST(unit_test_unity_engine, look_at_left)
+{
+    const auto angles = omath::unity_engine::CameraTrait::calc_look_at_angle({}, -omath::unity_engine::k_abs_right);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::unity_engine::forward_vector(angles);
+    for (const auto& [result, etalon] :
+         std::views::zip(dir_vector.as_array(), (-omath::unity_engine::k_abs_right).as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+TEST(unit_test_unity_engine, look_at_down)
+{
+    const auto angles = omath::unity_engine::CameraTrait::calc_look_at_angle({}, -omath::unity_engine::k_abs_up);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::unity_engine::forward_vector(angles);
+    for (const auto& [result, etalon] :
+         std::views::zip(dir_vector.as_array(), (-omath::unity_engine::k_abs_up).as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
diff --git a/tests/engines/unit_test_unreal_engine.cpp b/tests/engines/unit_test_unreal_engine.cpp
index 0a4441a1..e2679c81 100644
--- a/tests/engines/unit_test_unreal_engine.cpp
+++ b/tests/engines/unit_test_unreal_engine.cpp
@@ -7,6 +7,7 @@
 #include <omath/engines/unreal_engine/formulas.hpp>
 #include <print>
 #include <random>
+#include <ranges>
 
 TEST(unit_test_unreal_engine, ForwardVector)
 {
@@ -361,4 +362,59 @@ TEST(unit_test_unreal_engine, ConstexprConversions)
     static_assert(cm == 100000.0, "units_to_centimeters constexpr failed");
     static_assert(m == 1000.0, "units_to_meters constexpr failed");
     static_assert(km == 1.0, "units_to_kilometers constexpr failed");
+}
+TEST(unit_test_unreal_engine, look_at_forward)
+{
+    const auto angles = omath::unreal_engine::CameraTrait::calc_look_at_angle({}, omath::unreal_engine::k_abs_forward);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::unreal_engine::forward_vector(angles);
+    for (const auto& [result, etalon] : std::views::zip(dir_vector.as_array(), omath::unreal_engine::k_abs_forward.as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+TEST(unit_test_unreal_engine, look_at_right)
+{
+    const auto angles = omath::unreal_engine::CameraTrait::calc_look_at_angle({}, omath::unreal_engine::k_abs_right);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::unreal_engine::forward_vector(angles);
+    for (const auto& [result, etalon] : std::views::zip(dir_vector.as_array(), omath::unreal_engine::k_abs_right.as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+TEST(unit_test_unreal_engine, look_at_up)
+{
+    const auto angles = omath::unreal_engine::CameraTrait::calc_look_at_angle({}, omath::unreal_engine::k_abs_right);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::unreal_engine::forward_vector(angles);
+    for (const auto& [result, etalon] : std::views::zip(dir_vector.as_array(), omath::unreal_engine::k_abs_right.as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+
+TEST(unit_test_unreal_engine, look_at_back)
+{
+    const auto angles = omath::unreal_engine::CameraTrait::calc_look_at_angle({}, -omath::unreal_engine::k_abs_forward);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::unreal_engine::forward_vector(angles);
+    for (const auto& [result, etalon] : std::views::zip(dir_vector.as_array(), (-omath::unreal_engine::k_abs_forward).as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+TEST(unit_test_unreal_engine, look_at_left)
+{
+    const auto angles = omath::unreal_engine::CameraTrait::calc_look_at_angle({}, -omath::unreal_engine::k_abs_right);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::unreal_engine::forward_vector(angles);
+    for (const auto& [result, etalon] : std::views::zip(dir_vector.as_array(), (-omath::unreal_engine::k_abs_right).as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
+}
+TEST(unit_test_unreal_engine, look_at_down)
+{
+    const auto angles = omath::unreal_engine::CameraTrait::calc_look_at_angle({}, -omath::unreal_engine::k_abs_up);
+
+    // ReSharper disable once CppTooWideScopeInitStatement
+    const auto dir_vector = omath::unreal_engine::forward_vector(angles);
+    for (const auto& [result, etalon] : std::views::zip(dir_vector.as_array(), (-omath::unreal_engine::k_abs_up).as_array()))
+        EXPECT_NEAR(result, etalon, 0.0001f);
 }
\ No newline at end of file

From 609970cdfec6bfb70504d21dfd37873bd0dec206 Mon Sep 17 00:00:00 2001
From: Orange <orange-cpp@yandex.ru>
Date: Thu, 19 Feb 2026 07:57:04 +0300
Subject: [PATCH 07/10] fix

---
 include/omath/engines/cry_engine/traits/pred_engine_trait.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/omath/engines/cry_engine/traits/pred_engine_trait.hpp b/include/omath/engines/cry_engine/traits/pred_engine_trait.hpp
index 353fce24..a08423f2 100644
--- a/include/omath/engines/cry_engine/traits/pred_engine_trait.hpp
+++ b/include/omath/engines/cry_engine/traits/pred_engine_trait.hpp
@@ -70,7 +70,7 @@ namespace omath::cry_engine
         {
             const auto direction = (view_to - origin).normalized();
 
-            return angles::radians_to_degrees(std::atan2(direction.y, direction.z));
+            return angles::radians_to_degrees(-std::atan2(direction.x, direction.y));
         };
     };
 } // namespace omath::unity_engine

From 630ffa69f6d08fe5e54730b59ce6307104a45fa0 Mon Sep 17 00:00:00 2001
From: Orange <orange-cpp@yandex.ru>
Date: Thu, 19 Feb 2026 08:00:23 +0300
Subject: [PATCH 08/10] clang format

---
 include/omath/engines/cry_engine/constants.hpp                | 2 +-
 include/omath/engines/cry_engine/formulas.hpp                 | 2 +-
 include/omath/engines/cry_engine/traits/camera_trait.hpp      | 2 +-
 include/omath/engines/cry_engine/traits/pred_engine_trait.hpp | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/include/omath/engines/cry_engine/constants.hpp b/include/omath/engines/cry_engine/constants.hpp
index 70293ade..762d0404 100644
--- a/include/omath/engines/cry_engine/constants.hpp
+++ b/include/omath/engines/cry_engine/constants.hpp
@@ -22,4 +22,4 @@ namespace omath::cry_engine
     using RollAngle = Angle<float, -180.f, 180.f, AngleFlags::Normalized>;
 
     using ViewAngles = omath::ViewAngles<PitchAngle, YawAngle, RollAngle>;
-} // namespace omath::frostbite_engine
\ No newline at end of file
+} // namespace omath::cry_engine
\ No newline at end of file
diff --git a/include/omath/engines/cry_engine/formulas.hpp b/include/omath/engines/cry_engine/formulas.hpp
index 46c2b765..7a7c8152 100644
--- a/include/omath/engines/cry_engine/formulas.hpp
+++ b/include/omath/engines/cry_engine/formulas.hpp
@@ -71,4 +71,4 @@ namespace omath::cry_engine
     {
         return meters_to_units(kilometers * static_cast<FloatingType>(1000));
     }
-} // namespace omath::frostbite_engine
+} // namespace omath::cry_engine
diff --git a/include/omath/engines/cry_engine/traits/camera_trait.hpp b/include/omath/engines/cry_engine/traits/camera_trait.hpp
index b760c65b..e59f2a9c 100644
--- a/include/omath/engines/cry_engine/traits/camera_trait.hpp
+++ b/include/omath/engines/cry_engine/traits/camera_trait.hpp
@@ -21,4 +21,4 @@ namespace omath::cry_engine
                                              float near, float far) noexcept;
     };
 
-} // namespace omath::unreal_engine
\ No newline at end of file
+} // namespace omath::cry_engine
\ No newline at end of file
diff --git a/include/omath/engines/cry_engine/traits/pred_engine_trait.hpp b/include/omath/engines/cry_engine/traits/pred_engine_trait.hpp
index a08423f2..1e3621fb 100644
--- a/include/omath/engines/cry_engine/traits/pred_engine_trait.hpp
+++ b/include/omath/engines/cry_engine/traits/pred_engine_trait.hpp
@@ -73,4 +73,4 @@ namespace omath::cry_engine
             return angles::radians_to_degrees(-std::atan2(direction.x, direction.y));
         };
     };
-} // namespace omath::unity_engine
+} // namespace omath::cry_engine

From e46a369ddc0db4f84029d5b6b6d5963b4eb09f0d Mon Sep 17 00:00:00 2001
From: Orange <orange-cpp@yandex.ru>
Date: Thu, 19 Feb 2026 08:06:34 +0300
Subject: [PATCH 09/10] added more tests

---
 tests/engines/unit_test_cry_engine.cpp | 174 +++++++++++++++++++++++++
 1 file changed, 174 insertions(+)

diff --git a/tests/engines/unit_test_cry_engine.cpp b/tests/engines/unit_test_cry_engine.cpp
index 9c446cdd..a811fe87 100644
--- a/tests/engines/unit_test_cry_engine.cpp
+++ b/tests/engines/unit_test_cry_engine.cpp
@@ -63,4 +63,178 @@ TEST(unit_test_cry_engine, look_at_down)
     const auto dir_vector = cry_engine::forward_vector(angles);
     for (const auto& [result, etalon] : std::views::zip(dir_vector.as_array(), (-cry_engine::k_abs_up).as_array()))
         EXPECT_NEAR(result, etalon, 0.0001f);
+}
+
+TEST(unit_test_cry_engine, RightVector)
+{
+    const auto right = omath::cry_engine::right_vector({});
+
+    EXPECT_EQ(right, omath::cry_engine::k_abs_right);
+}
+
+TEST(unit_test_cry_engine, UpVector)
+{
+    const auto up = omath::cry_engine::up_vector({});
+    EXPECT_EQ(up, omath::cry_engine::k_abs_up);
+}
+
+TEST(unit_test_cry_engine, ProjectTargetMovedFromCamera)
+{
+    constexpr auto fov = omath::projection::FieldOfView::from_degrees(60.f);
+    const auto cam = omath::cry_engine::Camera({0, 0, 0}, {}, {1280.f, 720.f}, fov, 0.01f, 1000.f);
+
+    for (float distance = 0.02f; distance < 100.f; distance += 0.01f)
+    {
+        const auto projected = cam.world_to_screen({0, distance, 0});
+
+        EXPECT_TRUE(projected.has_value());
+
+        if (!projected.has_value())
+            continue;
+
+        EXPECT_NEAR(projected->x, 640, 0.00001f);
+        EXPECT_NEAR(projected->y, 360, 0.00001f);
+    }
+}
+
+TEST(unit_test_cry_engine, CameraSetAndGetFov)
+{
+    constexpr auto fov = omath::projection::FieldOfView::from_degrees(90.f);
+    auto cam = omath::cry_engine::Camera({0, 0, 0}, {}, {1920.f, 1080.f}, fov, 0.01f, 1000.f);
+
+    EXPECT_EQ(cam.get_field_of_view().as_degrees(), 90.f);
+    cam.set_field_of_view(omath::projection::FieldOfView::from_degrees(50.f));
+
+    EXPECT_EQ(cam.get_field_of_view().as_degrees(), 50.f);
+}
+
+TEST(unit_test_cry_engine, CameraSetAndGetOrigin)
+{
+    auto cam = omath::cry_engine::Camera({0, 0, 0}, {}, {1920.f, 1080.f}, {}, 0.01f, 1000.f);
+
+    EXPECT_EQ(cam.get_origin(), omath::Vector3<float>{});
+    cam.set_field_of_view(omath::projection::FieldOfView::from_degrees(50.f));
+
+    EXPECT_EQ(cam.get_field_of_view().as_degrees(), 50.f);
+}
+TEST(unit_test_cry_engine, loook_at_random_all_axis)
+{
+    std::mt19937 gen(std::random_device{}()); // Seed with a non-deterministic source
+    std::uniform_real_distribution<float> dist(-1000.f, 1000.f);
+
+    constexpr auto fov = omath::projection::FieldOfView::from_degrees(90.f);
+    auto cam = omath::cry_engine::Camera({0, 0, 0}, {}, {1920.f, 1080.f}, fov, 0.001f, 10000.f);
+
+    std::size_t failed_points = 0;
+
+    for (int i = 0; i < 1000; i++)
+    {
+        const auto position_to_look = omath::Vector3<float>{dist(gen), dist(gen), dist(gen)};
+
+        if (cam.get_origin().distance_to(position_to_look) < 10)
+            continue;
+
+        cam.look_at(position_to_look);
+
+        auto projected_pos = cam.world_to_view_port(position_to_look);
+
+        EXPECT_TRUE(projected_pos.has_value());
+
+        if (!projected_pos)
+            continue;
+
+        if (std::abs(projected_pos->x - 0.f) >= 0.0001f || std::abs(projected_pos->y - 0.f) >= 0.0001f)
+            failed_points++;
+    }
+    EXPECT_LE(failed_points, 100);
+}
+
+TEST(unit_test_cry_engine, loook_at_random_x_axis)
+{
+    std::mt19937 gen(std::random_device{}()); // Seed with a non-deterministic source
+    std::uniform_real_distribution<float> dist(-1000.f, 1000.f);
+
+    constexpr auto fov = omath::projection::FieldOfView::from_degrees(90.f);
+    auto cam = omath::cry_engine::Camera({0, 0, 0}, {}, {1920.f, 1080.f}, fov, 0.001f, 10000.f);
+
+    std::size_t failed_points = 0;
+    for (int i = 0; i < 1000; i++)
+    {
+        const auto position_to_look = omath::Vector3<float>{dist(gen), 0.f, 0.f};
+        if (cam.get_origin().distance_to(position_to_look) < 10)
+            continue;
+
+        cam.look_at(position_to_look);
+
+        auto projected_pos = cam.world_to_view_port(position_to_look);
+
+        EXPECT_TRUE(projected_pos.has_value());
+
+        if (!projected_pos)
+            continue;
+
+        if (std::abs(projected_pos->x - 0.f) >= 0.001f || std::abs(projected_pos->y - 0.f) >= 0.001f)
+            failed_points++;
+    }
+    EXPECT_LE(failed_points, 100);
+}
+
+TEST(unit_test_cry_engine, loook_at_random_y_axis)
+{
+    std::mt19937 gen(std::random_device{}()); // Seed with a non-deterministic source
+    std::uniform_real_distribution<float> dist(-1000.f, 1000.f);
+
+    constexpr auto fov = omath::projection::FieldOfView::from_degrees(90.f);
+    auto cam = omath::cry_engine::Camera({0, 0, 0}, {}, {1920.f, 1080.f}, fov, 0.001f, 10000.f);
+
+    std::size_t failed_points = 0;
+    for (int i = 0; i < 1000; i++)
+    {
+        const auto position_to_look = omath::Vector3<float>{0.f, dist(gen), 0.f};
+        if (cam.get_origin().distance_to(position_to_look) < 10)
+            continue;
+
+        cam.look_at(position_to_look);
+
+        auto projected_pos = cam.world_to_view_port(position_to_look);
+
+        EXPECT_TRUE(projected_pos.has_value());
+
+        if (!projected_pos)
+            continue;
+
+        if (std::abs(projected_pos->x - 0.f) >= 0.01f || std::abs(projected_pos->y - 0.f) >= 0.01f)
+            failed_points++;
+    }
+    EXPECT_LE(failed_points, 100);
+}
+
+TEST(unit_test_cry_engine, loook_at_random_z_axis)
+{
+    std::mt19937 gen(std::random_device{}()); // Seed with a non-deterministic source
+    std::uniform_real_distribution<float> dist(-1000.f, 1000.f);
+
+    constexpr auto fov = omath::projection::FieldOfView::from_degrees(90.f);
+    auto cam = omath::cry_engine::Camera({0, 0, 0}, {}, {1920.f, 1080.f}, fov, 0.001f, 10000.f);
+
+    std::size_t failed_points = 0;
+    for (int i = 0; i < 1000; i++)
+    {
+        const auto position_to_look = omath::Vector3<float>{0.f, 0.f, dist(gen)};
+        if (cam.get_origin().distance_to(position_to_look) < 10)
+            continue;
+
+        cam.look_at(position_to_look);
+
+        auto projected_pos = cam.world_to_view_port(position_to_look);
+
+        EXPECT_TRUE(projected_pos.has_value());
+
+        if (!projected_pos)
+            continue;
+
+        if (std::abs(projected_pos->x - 0.f) >= 0.01f || std::abs(projected_pos->y - 0.f) >= 0.01f)
+            failed_points++;
+    }
+    EXPECT_LE(failed_points, 100);
 }
\ No newline at end of file

From 0876af3c148b905bcfbeb952b8f10c10d717eeab Mon Sep 17 00:00:00 2001
From: Orange <orange-cpp@yandex.ru>
Date: Thu, 19 Feb 2026 08:34:21 +0300
Subject: [PATCH 10/10] added warning back

---
 .idea/editor.xml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.idea/editor.xml b/.idea/editor.xml
index bce786e3..2eff1aff 100644
--- a/.idea/editor.xml
+++ b/.idea/editor.xml
@@ -17,7 +17,7 @@
     <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppBoostFormatTooManyArgs/@EntryIndexedValue" value="WARNING" type="string" />
     <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppCStyleCast/@EntryIndexedValue" value="SUGGESTION" type="string" />
     <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppCVQualifierCanNotBeAppliedToReference/@EntryIndexedValue" value="WARNING" type="string" />
-    <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppClassCanBeFinal/@EntryIndexedValue" value="DO_NOT_SHOW" type="string" />
+    <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppClassCanBeFinal/@EntryIndexedValue" value="WARNING" type="string" />
     <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppClassIsIncomplete/@EntryIndexedValue" value="WARNING" type="string" />
     <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppClassNeedsConstructorBecauseOfUninitializedMember/@EntryIndexedValue" value="WARNING" type="string" />
     <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppClassNeverUsed/@EntryIndexedValue" value="WARNING" type="string" />
@@ -110,7 +110,7 @@
     <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppLambdaCaptureNeverUsed/@EntryIndexedValue" value="WARNING" type="string" />
     <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppLocalVariableMayBeConst/@EntryIndexedValue" value="HINT" type="string" />
     <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppLocalVariableMightNotBeInitialized/@EntryIndexedValue" value="WARNING" type="string" />
-    <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppLocalVariableWithNonTrivialDtorIsNeverUsed/@EntryIndexedValue" value="DO_NOT_SHOW" type="string" />
+    <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppLocalVariableWithNonTrivialDtorIsNeverUsed/@EntryIndexedValue" value="WARNING" type="string" />
     <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppLongFloat/@EntryIndexedValue" value="WARNING" type="string" />
     <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppMemberFunctionMayBeConst/@EntryIndexedValue" value="SUGGESTION" type="string" />
     <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CppMemberFunctionMayBeStatic/@EntryIndexedValue" value="SUGGESTION" type="string" />