/home/msneddon/eclipse/galileoSR1_cpp/workspace/NFsim/src/NFtest/agentcell/cell/util.hh

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#ifndef CHEMOTAXIS_UTIL_HH_
#define CHEMOTAXIS_UTIL_HH_

#include <math.h>
#include "../../../NFutil/NFutil.hh"




using namespace NFutil;


namespace ChemotaxisUtil {
        

class GammaSampler {
        
        public:
                GammaSampler(double alpha, double beta);
                
                GammaSampler(double alpha, double beta, double meanShift);
                
                
                double gen();
                
                double gen(double minAcceptableValue, double maxAcceptableValue);
        
        protected:
                double alpha;
                double oalpha;
                double beta;
                double a1;
                double a2;
                double meanShift;
        
        private:
                void init(double alpha, double beta, double meanShift);
};


// 2) random rotation matrix generator


void genUniformRandRotation3d(double rotMatrix[3][3]);
void genRot3dAboutAxis(double rotMatrix[3][3], double axis[3], double angleInRad);
void genRotFromAngles(double rotMatrix[3][3], double angleX, double angleY, double angleZ);

void applyRotation(double rotMatrix[3][3], double vec[3]);
void applyDisplacement(double pos[3], double dir[3], double distance);


}

#endif /*CHEMOTAXIS_UTIL_HH_*/

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