-/* phm.cpp */
-PHANTOM *phm_create(const int phmid);
-PHANTOM *phm_create_from_file(const char *fname);
-PHANTOM *phm_init(void);
-void phm_free (PHANTOM *phm);
-int phm_add_pelm_file(PHANTOM *phm, const char *fname);
-void phm_add_pelm (PHANTOM *phm, const char *type, const double cx, const double cy,
- const double u, const double v, const double rot, const double atten);
-int pelm_make_points(PELM *obj);
-void pelm_make_xform (PELM *obj);
-PELM *pelm_alloc(void);
-void calc_arc(double x[], double y[], const int pts, const double xcent, const double ycent,
- const double r, const double start, const double stop);
-void calc_ellipse(double x[], double y[], const int pts, const double u, const double v);
-int circle_pts(double theta);
-void phm_print(PHANTOM *phm);
-#if HAVE_SGP
-void phm_show(const PHANTOM *phm);
-void phm_draw(const PHANTOM *phm);
-#endif
-
-/* phmstd.cpp */
-void phm_std_herman (PHANTOM *phm);
-void phm_std_rowland (PHANTOM *phm);
-void phm_std_rowland_bordered (PHANTOM *phm);
-
-/* raycollect.cpp */
-int raysum_collect(RAYSUM *rs, const DETECTOR *det, const PHANTOM *phm, const int start_view, const int trace, const int unit_pulse);
-void rayview(const PHANTOM *phm, DETARRAY *darray, const DETECTOR *det, const double xd1, const double yd1, const double xd2, const double yd2, const double xs1, const double ys1, const double xs2, const double ys2, const int unit_pulse);
-double phm_ray_attenuation (const PHANTOM *phm, const double x1, const double y1, const double x2, const double y2);
-double pelm_ray_attenuation (PELM *pelm, const double x1, const double y1, const double x2, const double y2);
-int pelm_clip_line (const PELM *pelm, double& x1, double& y1, double& x2, double& y2);
-void raysum_trace_show_param (const char *label, const char *fmt, int row, int color, ...);
-
-/* scanner.cpp */
-DETECTOR *detector_create(const PHANTOM *phm, const ScannerGeometry geometry, int ndet, int nview, int nsample, const double rot_anglen);
-void detector_free(DETECTOR *det);
-
-/* rayio.cpp */
-RAYSUM *raysum_create(const char *fname, const int nview, const int ndet);
-RAYSUM *raysum_create_from_det(const char *fname, const DETECTOR *det);
-RAYSUM *raysum_open(const char *filename);
-void raysum_alloc_views(RAYSUM *rs);
-void raysum_free(RAYSUM *rs);
-int raysum_is_open(RAYSUM *rs);
-int raysum_close(RAYSUM *rs);
-int raysum_read_header(RAYSUM *rs);
-int raysum_write_header(RAYSUM *rs);
-int raysum_read(RAYSUM *rs);
-int raysum_write(RAYSUM *rs);
-void raysum_print(const RAYSUM *rs);
-void raysum_print_info(const RAYSUM *rs);
-DETARRAY *detarray_alloc(const int n);
-void detarray_free(DETARRAY *darray);
-int detarray_read(RAYSUM *rs, DETARRAY *darray, const int view_num);
-int detarray_write(RAYSUM *rs, const DETARRAY *darray, const int view_num);
-