added legacy impl

include/omath/projectile_prediction/ProjPredEngineLegacy.hpp

@@ -0,0 +1,41 @@
+//
+// Created by Vlad on 6/9/2024.
+//
+
+#pragma once
+
+#include <optional>
+#include "omath/Vector3.hpp"
+#include "omath/projectile_prediction/ProjPredEngine.hpp"
+#include "omath/projectile_prediction/Projectile.hpp"
+#include "omath/projectile_prediction/Target.hpp"
+
+
+namespace omath::projectile_prediction
+{
+    class ProjPredEngineLegacy final : public ProjPredEngine
+    {
+    public:
+        explicit ProjPredEngineLegacy(float gravityConstant, float simulationTimeStep, float maximumSimulationTime,
+                                      float distanceTolerance);
+
+        [[nodiscard]]
+        std::optional<Vector3> MaybeCalculateAimPoint(const Projectile& projectile,
+                                                      const Target& target) const override;
+
+    private:
+        const float m_gravityConstant;
+        const float m_simulationTimeStep;
+        const float m_maximumSimulationTime;
+        const float m_distanceTolerance;
+
+        [[nodiscard]]
+        std::optional<float> MaybeCalculateProjectileLaunchPitchAngle(const Projectile& projectile,
+                                                                      const Vector3& targetPosition) const;
+
+
+        [[nodiscard]]
+        bool IsProjectileReachedTarget(const Vector3& targetPosition, const Projectile& projectile, float pitch,
+                                       float time) const;
+    };
+} // namespace omath::projectile_prediction