From 721ef20fdcc8171b0cdcf7ee3402a0fb6eb37f46 Mon Sep 17 00:00:00 2001
From: Alexander Schmidt <alex@treefish.org>
Date: Wed, 20 Jul 2016 22:55:20 +0200
Subject: [PATCH] Pass wind speed and magic constant via sea constructor

---
 include/sea.h      | 4 ++--
 src/sea.cpp        | 8 ++++----
 src/seamulator.cpp | 2 +-
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/include/sea.h b/include/sea.h
index 798b92d..01f8c92 100644
--- a/include/sea.h
+++ b/include/sea.h
@@ -13,19 +13,19 @@
 class Sea
 {
  public:
-  Sea(WaterSurfacePtr surface);
+  Sea(WaterSurfacePtr surface, double windSpeed, double magicConstant);
   ~Sea();
   Sea(const Sea&) = delete;
   Sea& operator=(const Sea&) = delete;
   void update();
 
  private:
-  static const double PHILLIPS_CONSTANT;
   static const double GRAVITATIONAL_CONSTANT;
 
   WaterSurfacePtr m_surface;
   double m_windDirection[2];
   double m_windSpeed;
+  double m_magicConstant;
   std::random_device m_randomDevice;
   std::mt19937 m_randomGenerator;
   std::normal_distribution<> m_normalDistribution;
diff --git a/src/sea.cpp b/src/sea.cpp
index 85191d4..597e0a1 100644
--- a/src/sea.cpp
+++ b/src/sea.cpp
@@ -6,13 +6,13 @@
 
 #include "watersurface.h"
 
-const double Sea::PHILLIPS_CONSTANT{0.0000001};
 const double Sea::GRAVITATIONAL_CONSTANT{9.8};
 
-Sea::Sea(WaterSurfacePtr surface) :
+Sea::Sea(WaterSurfacePtr surface, double windSpeed, double magicConstant) :
   m_surface{surface},
   m_windDirection{1, 0},
-  m_windSpeed{10},
+  m_windSpeed{windSpeed},
+  m_magicConstant{magicConstant},
   m_randomGenerator{m_randomDevice()},
   m_normalDistribution{0.0, 1.0}
 {
@@ -89,7 +89,7 @@ double Sea::phillipsSpectrum(double k_x, double k_y) const
   const double cosineFactor = pow((k_x / k) * m_windDirection[0] +
 				  (k_y / k) * m_windDirection[1], 2);
 
-  return PHILLIPS_CONSTANT * exp(-1 / pow(k * L, 2)) / pow(k, 4) *
+  return m_magicConstant * exp(-1 / pow(k * L, 2)) / pow(k, 4) *
     cosineFactor;
 }
 
diff --git a/src/seamulator.cpp b/src/seamulator.cpp
index c5f7936..92dfac6 100644
--- a/src/seamulator.cpp
+++ b/src/seamulator.cpp
@@ -33,7 +33,7 @@ int main(int argc, char** argv)
   std::srand(std::time(0));
 
   surface = std::make_shared<WaterSurface>(LATTICE_SIZE, LATTICE_EXTEND);
-  sea = std::make_shared<Sea>(surface);
+  sea = std::make_shared<Sea>(surface, 10, 0.0000001);
   seaView = std::make_unique<SeaView>(INIT_VIEW_DISTANCE, INIT_VIEW_AZIMUTH,
 				      INIT_VIEW_ALTITUDE);
 
-- 
2.39.2