added warning back

.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" />

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
+} // namespace omath::cry_engine

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

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>;
+}

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
+} // namespace omath::cry_engine

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
+} // namespace omath::cry_engine

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

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
 

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>>

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
     {

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,

tests/engines/unit_test_cry_engine.cpp

@@ -0,0 +1,240 @@
+//
+// 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);
+}
+
+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);
+}

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);
-}
+}
+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);
+}

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);
 }

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);
 }

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);
 }

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);
-}
+}
+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);
+}

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);
 }