ThemisIrDistortionMap.cpp

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#include <cmath>
#include "ThemisIrDistortionMap.h"

using namespace std;

namespace Isis {
  ThemisIrDistortionMap::ThemisIrDistortionMap(Camera *parent) :
    CameraDistortionMap(parent, 1.0) {
    SetBand(1);
    p_alpha1 = 0.00447623;  // Currently not used
    p_alpha2 = 0.00107556;  // Disabled Y portion of optical distortion
  }

  void ThemisIrDistortionMap::SetBand(const int band) {
    if(band < 1 || band > 10) {
      string msg = "Band number out of array bounds in ThemisIRDistortionMap";
      throw IException(IException::Programmer, msg, _FILEINFO_);
    }
    double k[] = { 0.996005, 0.995358, 0.994260, 0.993290, 0.992389,
                   0.991474, 0.990505, 0.989611, 0.988653, 0.9877
                 };

    p_k = k[band-1];
  }


  bool ThemisIrDistortionMap::SetFocalPlane(const double dx,
      const double dy) {
    p_focalPlaneX = dx;
    p_focalPlaneY = dy;

    p_undistortedFocalPlaneX = p_focalPlaneX / p_k;

    double radical = (1.0 + p_alpha1) * (1.0 + p_alpha1) + 4.0 * p_alpha2 * dy;
    if(radical < 0.0) return false;
    radical = sqrt(radical);
    double denom = 1.0 + p_alpha1 + radical;
    if(denom == 0.0) return false;
    p_undistortedFocalPlaneY = 2.0 * dy / denom;

    return true;
  }

  bool ThemisIrDistortionMap::SetUndistortedFocalPlane(const double ux,
      const double uy) {
    p_undistortedFocalPlaneX = ux;
    p_undistortedFocalPlaneY = uy;

    p_focalPlaneX = p_undistortedFocalPlaneX * p_k;

    p_focalPlaneY = p_undistortedFocalPlaneY +
                    p_alpha1 * p_undistortedFocalPlaneY +
                    p_alpha2 * p_undistortedFocalPlaneY * p_undistortedFocalPlaneY;

    return true;
  }
}