1 files changed, 49 insertions, 0 deletions
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