improvement

include/omath/algorithm/radar.hpp

@@ -12,15 +12,21 @@ namespace omath::algorithm
     [[nodiscard]]
     Vector2<float> world_to_radar(const Camera& camera, const Vector3<FloatingType>& position, const FloatingType scale)
     {
-        auto look_at_angles = camera.calc_look_at_angles(position);
-        auto current_angles = camera.get_view_angles();
 
-        auto yaw = look_at_angles.yaw - current_angles.yaw + decltype(current_angles.yaw)::from_degrees(180);
-        auto right_yaw = camera.calc_look_at_angles(camera.get_origin() + camera.get_abs_right()).yaw
-                         - current_angles.yaw + decltype(current_angles.yaw)::from_degrees(180);
-        const auto right_scale = right_yaw.sin() < 0 ? -1.f : 1.f;
+        const auto look_at_angles = camera.calc_look_at_angles(position);
+        const auto current_angles = camera.get_view_angles();
 
-        return omath::Vector2<float>(static_cast<float>(yaw.sin()) * right_scale, yaw.cos())
+        static const auto sign = [&camera, &current_angles]
+        {
+            auto right_yaw = current_angles.yaw
+                           - camera.calc_look_at_angles(camera.get_origin() + camera.get_abs_right()).yaw
+                           - decltype(current_angles.yaw)::from_degrees(90);
+            return right_yaw.cos() < 0 ? -1.f : 1.f;
+        }();
+
+        const auto yaw = current_angles.yaw - look_at_angles.yaw - decltype(current_angles.yaw)::from_degrees(90);
+
+        return omath::Vector2<float>(static_cast<float>(yaw.cos()) * sign, static_cast<float>(yaw.sin()))
                * (camera.get_origin().distance_to(position) * scale);
     }
 } // namespace omath::algorithm

include/omath/trigonometry/angle.hpp

@@ -125,7 +125,7 @@ namespace omath
         }
 
         [[nodiscard]]
-        constexpr Angle operator+(const Angle& other) noexcept
+        constexpr Angle operator+(const Angle& other) const noexcept
         {
             if constexpr (flags == AngleFlags::Normalized)
                 return Angle{angles::wrap_angle(m_angle + other.m_angle, min, max)};
@@ -140,7 +140,7 @@ namespace omath
         }
 
         [[nodiscard]]
-        constexpr Angle operator-(const Angle& other) noexcept
+        constexpr Angle operator-(const Angle& other) const noexcept
         {
             return operator+(-other);
         }

tests/general/unit_test_angle.cpp

@@ -183,7 +183,7 @@ TEST(UnitTestAngle, Formatter_PrintsDegreesWithSuffix)
 
 TEST(UnitTestAngle, BinaryPlus_ReturnsWrappedSum)
 {
-    Angle<> a = Deg::from_degrees(350.0f);
+    const Angle<> a = Deg::from_degrees(350.0f);
     const Deg b = Deg::from_degrees(20.0f);
     const Deg c = a + b; // expect 10°
     EXPECT_FLOAT_EQ(c.as_degrees(), 10.0f);
@@ -191,7 +191,7 @@ TEST(UnitTestAngle, BinaryPlus_ReturnsWrappedSum)
 
 TEST(UnitTestAngle, BinaryMinus_ReturnsWrappedDiff)
 {
-    Angle<> a = Deg::from_degrees(10.0f);
+    const Angle<> a = Deg::from_degrees(10.0f);
     const Deg b = Deg::from_degrees(30.0f);
     const Deg c = a - b; // expect 340°
     EXPECT_FLOAT_EQ(c.as_degrees(), 340.0f);