hkl/hkl-engine-zaxis.c

   1 /* This file is part of the hkl library.
   2  *
   3  * The hkl library is free software: you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation, either version 3 of the License, or
   6  * (at your option) any later version.
   7  *
   8  * The hkl library is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with the hkl library.  If not, see <http://www.gnu.org/licenses/>.
  15  *
  16  * Copyright (C) 2003-2017 Synchrotron SOLEIL
  17  *                         L'Orme des Merisiers Saint-Aubin
  18  *                         BP 48 91192 GIF-sur-YVETTE CEDEX
  19  *
  20  * Authors: Picca Frédéric-Emmanuel <picca@synchrotron-soleil.fr>
  21  */
  22 #include <gsl/gsl_sys.h>                // for gsl_isnan
  23 #include "hkl-factory-private.h"        // for autodata_factories_, etc
  24 #include "hkl-pseudoaxis-common-hkl-private.h"  // for RUBh_minus_Q, etc
  25 #include "hkl-pseudoaxis-common-q-private.h"  // for hkl_engine_q2_new, etc
  26 #include "hkl-pseudoaxis-common-tth-private.h"  // for hkl_engine_tth2_new, etc
  27 #include "hkl-pseudoaxis-common-readonly-private.h"  // for hkl_engine_tth2_new, etc
  28
  29 #define MU "mu"
  30 #define OMEGA "omega"
  31 #define DELTA "delta"
  32 #define GAMMA "gamma"
  33
  34 /* #define DEBUG */
  35
  36 static HklMode* _zaxis()
  37 {
  38         static const char *axes_r[] = {MU, OMEGA, DELTA, GAMMA};
  39         static const char *axes_w[] = {OMEGA, DELTA, GAMMA};
  40         static const HklFunction *functions[] = {&RUBh_minus_Q_func};
  41         static const HklModeAutoInfo info = {
  42                 HKL_MODE_AUTO_INFO("zaxis", axes_r, axes_w, functions),
  43         };
  44
  45         return hkl_mode_auto_new(&info,
  46                                  &hkl_full_mode_operations,
  47                                  TRUE);
  48 }
  49
  50 /* reflectivity */
  51
  52 static int _reflectivity_func(const gsl_vector *x, void *params, gsl_vector *f)
  53 {
  54         const double mu = x->data[0];
  55         const double gamma = x->data[3];
  56
  57         CHECK_NAN(x->data, x->size);
  58
  59         RUBh_minus_Q(x->data, params, f->data);
  60         f->data[3] = mu - gamma;
  61
  62         return  GSL_SUCCESS;
  63 }
  64
  65 static const HklFunction reflectivity_func = {
  66         .function = _reflectivity_func,
  67         .size = 4,
  68 };
  69
  70 static HklMode* reflectivity()
  71 {
  72         static const char* axes[] = {MU, OMEGA, DELTA, GAMMA};
  73         static const HklFunction *functions[] = {&reflectivity_func};
  74         static const HklModeAutoInfo info = {
  75                 HKL_MODE_AUTO_INFO(__func__, axes, axes, functions),
  76         };
  77
  78         return hkl_mode_auto_new(&info,
  79                                  &hkl_full_mode_operations,
  80                                  TRUE);
  81 }
  82
  83 /**********************/
  84 /* pseudo axis engine */
  85 /**********************/
  86
  87 static HklEngine *hkl_engine_zaxis_hkl_new(HklEngineList *engines)
  88 {
  89         HklEngine *self;
  90         HklMode *default_mode;
  91
  92         self = hkl_engine_hkl_new(engines);
  93
  94         default_mode = _zaxis();
  95         hkl_engine_add_mode(self, default_mode);
  96         hkl_engine_mode_set(self, default_mode);
  97
  98         hkl_engine_add_mode(self, reflectivity());
  99
 100         return self;
 101 }
 102
 103 /*****************/
 104 /* mode readonly */
 105 /*****************/
 106
 107 REGISTER_READONLY_INCIDENCE(hkl_engine_zaxis_incidence_new,
 108                             P99_PROTECT({MU, OMEGA}),
 109                             surface_parameters_y);
 110
 111 REGISTER_READONLY_EMERGENCE(hkl_engine_zaxis_emergence_new,
 112                             P99_PROTECT({MU, OMEGA, DELTA, GAMMA}),
 113                             surface_parameters_y);
 114
 115 /*********/
 116 /* ZAXIS */
 117 /*********/
 118
 119 #define HKL_GEOMETRY_TYPE_ZAXIS_DESCRIPTION                             \
 120         "For this geometry the **mu** axis is common to the sample and the detector.\n" \
 121         "\n"                                                            \
 122         "+ xrays source fix allong the :math:`\\vec{x}` direction (1, 0, 0)\n" \
 123         "+ 2 axes for the sample\n"                                     \
 124         "\n"                                                            \
 125         "  + **" MU "** : rotation around the :math:`\\vec{z}` direction (0, 0, 1)\n" \
 126         "  + **" OMEGA "** : rotating around the :math:`-\\vec{y}` direction (0, -1, 0)\n" \
 127         "\n"                                                            \
 128         "+ 3 axis for the detector\n"                                   \
 129         "\n"                                                            \
 130         "  + **" MU "** : rotation around the :math:`\\vec{z}` direction (0, 0, 1)\n" \
 131         "  + **" DELTA "** : rotation around the :math:`-\\vec{y}` direction (0, -1, 0)\n" \
 132         "  + **" GAMMA "** : rotation around the :math:`\\vec{z}` direction (0, 0, 1)\n"
 133
 134 static const char* hkl_geometry_zaxis_axes[] = {MU, OMEGA, DELTA, GAMMA};
 135
 136 static HklGeometry *hkl_geometry_new_zaxis(const HklFactory *factory)
 137 {
 138         HklGeometry *self = hkl_geometry_new(factory, &hkl_geometry_operations_defaults);
 139         HklHolder *h;
 140
 141         h = hkl_geometry_add_holder(self);
 142         hkl_holder_add_rotation(h, MU, 0, 0, 1, &hkl_unit_angle_deg);
 143         hkl_holder_add_rotation(h, OMEGA, 0, -1, 0, &hkl_unit_angle_deg);
 144
 145         h = hkl_geometry_add_holder(self);
 146         hkl_holder_add_rotation(h, MU, 0, 0, 1, &hkl_unit_angle_deg);
 147         hkl_holder_add_rotation(h, DELTA, 0, -1, 0, &hkl_unit_angle_deg);
 148         hkl_holder_add_rotation(h, GAMMA, 0, 0, 1, &hkl_unit_angle_deg);
 149
 150         return self;
 151 }
 152
 153 static HklEngineList *hkl_engine_list_new_zaxis(const HklFactory *factory)
 154 {
 155         HklEngineList *self = hkl_engine_list_new();
 156
 157         hkl_engine_zaxis_hkl_new(self);
 158         hkl_engine_q2_new(self);
 159         hkl_engine_qper_qpar_new(self);
 160         hkl_engine_tth2_new(self);
 161         hkl_engine_zaxis_incidence_new(self);
 162         hkl_engine_zaxis_emergence_new(self);
 163
 164         return self;
 165 }
 166
 167 REGISTER_DIFFRACTOMETER(zaxis, "ZAXIS", HKL_GEOMETRY_TYPE_ZAXIS_DESCRIPTION);