Generated by Cython 0.22

Raw output: great_circle_cy_v2.c

 01: cdef extern from "math.h":
 02:     float cosf(float theta)
 03:     float sinf(float theta)
 04:     float acosf(float theta)
 05: 
+06: def great_circle(double lon1,double lat1,double lon2,double lat2):
/* Python wrapper */
static PyObject *__pyx_pw_18great_circle_cy_v2_1great_circle(PyObject *__pyx_self, PyObject *__pyx_args, PyObject *__pyx_kwds); /*proto*/
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static PyObject *__pyx_pw_18great_circle_cy_v2_1great_circle(PyObject *__pyx_self, PyObject *__pyx_args, PyObject *__pyx_kwds) {
  double __pyx_v_lon1;
  double __pyx_v_lat1;
  double __pyx_v_lon2;
  double __pyx_v_lat2;
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        case  0: break;
        default: goto __pyx_L5_argtuple_error;
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        else goto __pyx_L5_argtuple_error;
        case  1:
        if (likely((values[1] = PyDict_GetItem(__pyx_kwds, __pyx_n_s_lat1)) != 0)) kw_args--;
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  /* function exit code */
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static PyObject *__pyx_pf_18great_circle_cy_v2_great_circle(CYTHON_UNUSED PyObject *__pyx_self, double __pyx_v_lon1, double __pyx_v_lat1, double __pyx_v_lon2, double __pyx_v_lat2) {
  double __pyx_v_a;
  double __pyx_v_b;
  double __pyx_v_theta;
  double __pyx_v_c;
  double __pyx_v_x;
  double __pyx_v_radius;
  double __pyx_v_pi;
  PyObject *__pyx_r = NULL;
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/* … */
  /* function exit code */
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/* … */
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/* … */
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 07:     cdef double a, b, theta, c, x, radius
+08:     cdef double pi = 3.141592653589793
  __pyx_v_pi = 3.141592653589793;
 09: 
+10:     radius = 3956 #miles
  __pyx_v_radius = 3956.0;
+11:     x = pi/180.0
  __pyx_v_x = (__pyx_v_pi / 180.0);
 12: 
+13:     a = (90.0-lat1)*(x)
  __pyx_v_a = ((90.0 - __pyx_v_lat1) * __pyx_v_x);
+14:     b = (90.0-lat2)*(x)
  __pyx_v_b = ((90.0 - __pyx_v_lat2) * __pyx_v_x);
+15:     theta = (lon2-lon1)*(x)
  __pyx_v_theta = ((__pyx_v_lon2 - __pyx_v_lon1) * __pyx_v_x);
+16:     c = acosf((cosf(a)*cosf(b)) +
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 17:                   (sinf(a)*sinf(b)*cosf(theta)))
+18:     return radius*c
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