hecmw_geometric.c

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/*****************************************************************************
 * Copyright (c) 2019 FrontISTR Commons
 * This software is released under the MIT License, see LICENSE.txt
 *****************************************************************************/
 
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "hecmw_geometric.h"
 
#define HECMW_PI 3.1415926535897932
 
/* Degree to Radian Transformation */
double HECMW_degree_to_radian(double deg) { return deg * HECMW_PI / 180; }
 
/* Radian to Degree Transformation */
double HECMW_radian_to_degree(double rad) { return rad * 180 / HECMW_PI; }
 
int HECMW_cylindrical_to_cartesian(const struct hecmw_coord *coord,
                                   struct hecmw_coord *result) {
  double r;
  double rtheta;
  double z;
 
  if (result == NULL) return -1;
 
  r      = coord->x;
  rtheta = coord->y; /* radian */
  z      = coord->z;
 
  result->x = r * cos(rtheta);
  result->y = r * sin(rtheta);
  result->z = z;
 
  return 0;
}