From 0c1f50351a0287252c4b0f7e9edbfb945481e6f7 Mon Sep 17 00:00:00 2001
From: astrojhgu <astrojhgu@ed2142bd-67ad-457f-ba7c-d818d4011675>
Date: Tue, 13 Oct 2009 03:08:47 +0000
Subject: git-svn-id: file:///home/svn/opt_utilities@80
 ed2142bd-67ad-457f-ba7c-d818d4011675

---
 models/polar_ellipse.hpp | 49 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 models/polar_ellipse.hpp

(limited to 'models/polar_ellipse.hpp')

diff --git a/models/polar_ellipse.hpp b/models/polar_ellipse.hpp
new file mode 100644
index 0000000..0b574a4
--- /dev/null
+++ b/models/polar_ellipse.hpp
@@ -0,0 +1,49 @@
+#ifndef PELLIPSE_MODEL_H_
+#define PELLIPSE_MODEL_H_
+#define OPT_HEADER
+#include <core/fitter.hpp>
+#include <cmath>
+
+namespace opt_utilities
+{
+  template <typename T>
+  class polar_ellipse
+    :public model<T,T,std::vector<T>,std::string>
+  {
+  private:
+    model<T,T,std::vector<T> >* do_clone()const
+    {
+      return new polar_ellipse<T>(*this);
+    }
+  public:
+    polar_ellipse()
+    {
+      this->push_param_info(param_info<std::vector<T> >("a",1,0,10));
+      this->push_param_info(param_info<std::vector<T> >("e",0,0,1));
+      this->push_param_info(param_info<std::vector<T> >("theta0",0,0,360));
+    }
+
+  public:
+    T do_eval(const T& x,const std::vector<T>& param)
+    {
+      double a=param[0];
+      double e=param[1];
+      double t0=param[2];
+      double t=x-t0;
+      t=t/180.*3.14159265358979;
+      return a*(1-e*e)/(1-e*cos(t));
+    }
+
+  private:
+    std::string do_to_string()const
+    {
+      return "linear model\n"
+	"y=k*x+b\n";
+    }
+  };
+}
+
+
+
+#endif
+//EOF
-- 
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