all of the changes

include/FluidSim/AudioProcessing.hpp

@@ -1,13 +1,11 @@
 #pragma once
 
-#include <vector>
-
 namespace fluidsim::port {
 
 struct AudioFrame { float left{}, right{}; };
 struct Vec3 { float x{}, y{}, z{}; };
 
-// Flow-derivative sound source used by the C# two-stroke and pulse scenarios.
+// Simple flow-derivative source used by the Helmholtz and pulse scenarios.
 class SoundProcessor {
 public:
     float gain{0.005f};
@@ -17,34 +15,4 @@ private:
     float dt_{}, scale_factor_{}, previous_flow_{};
 };
 
-class RadiationSource {
-public:
-    // Optional diagnostic filters; disabled for the linear radiation path.
-    float flow_tau{0.0f}, smooth_tau{0.0f}, gain{0.005f};
-    Vec3 pipe_end{}, pipe_axis{1.0f, 0.0f, 0.0f};
-    Vec3 listener{0.0f, 0.0f, 1.5f}, listener_right{1.0f, 0.0f, 0.0f};
-    float ear_spacing{0.18f}, head_shadow_cutoff{0.0f}, speed_of_sound{343.0f};
-    float directivity_balance{0.0f}, air_absorption_exponent{0.0f}, min_air_cutoff{1500.0f};
-
-    explicit RadiationSource(int sample_rate = 44100);
-    AudioFrame process(float mass_flow);
-    float last_mono_pressure() const { return last_mono_pressure_; }
-
-private:
-    class DelayLine;
-    class OnePole;
-    int sample_rate_{};
-    float dt_{}, flow_lp_{}, previous_flow_lp_{}, smooth_derivative_{};
-    float last_mono_pressure_{};
-    std::vector<float> left_delay_, right_delay_;
-    std::size_t write_position_{}, left_offset_{}, right_offset_{};
-    float air_filter_{}, shadow_left_{}, shadow_right_{};
-
-    static float dot(Vec3 a, Vec3 b);
-    static float length(Vec3 value);
-    static Vec3 subtract(Vec3 a, Vec3 b);
-    float one_pole(float input, float cutoff, float& state) const;
-    float delayed(float input, std::vector<float>& buffer, std::size_t offset);
-};
-
 } // namespace fluidsim::port