def test(args=[]): ############################# # Setup experimental models # ############################# master_phil = parse( """ include scope dials.test.algorithms.refinement.geometry_phil include scope dials.test.algorithms.refinement.minimiser_phil """, process_includes=True, ) models = setup_geometry.Extract(master_phil, cmdline_args=args) single_panel_detector = models.detector mygonio = models.goniometer mycrystal = models.crystal mybeam = models.beam # Make a 3x3 multi panel detector filling the same space as the existing # single panel detector. Each panel of the multi-panel detector has pixels with # 1/3 the length dimensions of the single panel. multi_panel_detector = Detector() for x in range(3): for y in range(3): new_panel = make_panel_in_array((x, y), single_panel_detector[0]) multi_panel_detector.add_panel(new_panel) # Build a mock scan for a 180 degree sweep sf = ScanFactory() myscan = sf.make_scan( image_range=(1, 1800), exposure_times=0.1, oscillation=(0, 0.1), epochs=list(range(1800)), deg=True, ) sweep_range = myscan.get_oscillation_range(deg=False) im_width = myscan.get_oscillation(deg=False)[1] assert sweep_range == (0.0, pi) assert approx_equal(im_width, 0.1 * pi / 180.0) # Build ExperimentLists experiments_single_panel = ExperimentList() experiments_multi_panel = ExperimentList() experiments_single_panel.append( Experiment( beam=mybeam, detector=single_panel_detector, goniometer=mygonio, scan=myscan, crystal=mycrystal, imageset=None, )) experiments_multi_panel.append( Experiment( beam=mybeam, detector=multi_panel_detector, goniometer=mygonio, scan=myscan, crystal=mycrystal, imageset=None, )) ########################### # Parameterise the models # ########################### det_param = DetectorParameterisationSinglePanel(single_panel_detector) s0_param = BeamParameterisation(mybeam, mygonio) xlo_param = CrystalOrientationParameterisation(mycrystal) xluc_param = CrystalUnitCellParameterisation(mycrystal) multi_det_param = DetectorParameterisationMultiPanel( multi_panel_detector, mybeam) # Fix beam to the X-Z plane (imgCIF geometry), fix wavelength s0_param.set_fixed([True, False, True]) # Fix crystal parameters # xluc_param.set_fixed([True, True, True, True, True, True]) ######################################################################## # Link model parameterisations together into a parameterisation of the # # prediction equation # ######################################################################## pred_param = XYPhiPredictionParameterisation(experiments_single_panel, [det_param], [s0_param], [xlo_param], [xluc_param]) pred_param2 = XYPhiPredictionParameterisation( experiments_multi_panel, [multi_det_param], [s0_param], [xlo_param], [xluc_param], ) ################################ # Apply known parameter shifts # ################################ # shift detectors by 1.0 mm each translation and 2 mrad each rotation det_p_vals = det_param.get_param_vals() p_vals = [ a + b for a, b in zip(det_p_vals, [1.0, 1.0, 1.0, 2.0, 2.0, 2.0]) ] det_param.set_param_vals(p_vals) multi_det_p_vals = multi_det_param.get_param_vals() p_vals = [ a + b for a, b in zip(multi_det_p_vals, [1.0, 1.0, 1.0, 2.0, 2.0, 2.0]) ] multi_det_param.set_param_vals(p_vals) # shift beam by 2 mrad in free axis s0_p_vals = s0_param.get_param_vals() p_vals = list(s0_p_vals) p_vals[0] += 2.0 s0_param.set_param_vals(p_vals) # rotate crystal a bit (=2 mrad each rotation) xlo_p_vals = xlo_param.get_param_vals() p_vals = [a + b for a, b in zip(xlo_p_vals, [2.0, 2.0, 2.0])] xlo_param.set_param_vals(p_vals) # change unit cell a bit (=0.1 Angstrom length upsets, 0.1 degree of # gamma angle) xluc_p_vals = xluc_param.get_param_vals() cell_params = mycrystal.get_unit_cell().parameters() cell_params = [ a + b for a, b in zip(cell_params, [0.1, 0.1, 0.1, 0.0, 0.0, 0.1]) ] new_uc = unit_cell(cell_params) newB = matrix.sqr(new_uc.fractionalization_matrix()).transpose() S = symmetrize_reduce_enlarge(mycrystal.get_space_group()) S.set_orientation(orientation=newB) X = tuple([e * 1.0e5 for e in S.forward_independent_parameters()]) xluc_param.set_param_vals(X) ############################# # Generate some reflections # ############################# # All indices in a 2.0 Angstrom sphere resolution = 2.0 index_generator = IndexGenerator( mycrystal.get_unit_cell(), space_group(space_group_symbols(1).hall()).type(), resolution, ) indices = index_generator.to_array() # for the reflection predictor, it doesn't matter which experiment list is # passed, as the detector is not used ref_predictor = ScansRayPredictor(experiments_single_panel, sweep_range) # get two sets of identical reflections obs_refs = ref_predictor(indices) obs_refs2 = ref_predictor(indices) for r1, r2 in zip(obs_refs, obs_refs2): assert r1["s1"] == r2["s1"] # get the panel intersections sel = ray_intersection(single_panel_detector, obs_refs) obs_refs = obs_refs.select(sel) sel = ray_intersection(multi_panel_detector, obs_refs2) obs_refs2 = obs_refs2.select(sel) assert len(obs_refs) == len(obs_refs2) # Set 'observed' centroids from the predicted ones obs_refs["xyzobs.mm.value"] = obs_refs["xyzcal.mm"] obs_refs2["xyzobs.mm.value"] = obs_refs2["xyzcal.mm"] # Invent some variances for the centroid positions of the simulated data im_width = 0.1 * pi / 180.0 px_size = single_panel_detector[0].get_pixel_size() var_x = flex.double(len(obs_refs), (px_size[0] / 2.0)**2) var_y = flex.double(len(obs_refs), (px_size[1] / 2.0)**2) var_phi = flex.double(len(obs_refs), (im_width / 2.0)**2) # set the variances and frame numbers obs_refs["xyzobs.mm.variance"] = flex.vec3_double(var_x, var_y, var_phi) obs_refs2["xyzobs.mm.variance"] = flex.vec3_double(var_x, var_y, var_phi) # Add in flags and ID columns by copying into standard reflection tables tmp = flex.reflection_table.empty_standard(len(obs_refs)) tmp.update(obs_refs) obs_refs = tmp tmp = flex.reflection_table.empty_standard(len(obs_refs2)) tmp.update(obs_refs2) obs_refs2 = tmp ############################### # Undo known parameter shifts # ############################### s0_param.set_param_vals(s0_p_vals) det_param.set_param_vals(det_p_vals) multi_det_param.set_param_vals(det_p_vals) xlo_param.set_param_vals(xlo_p_vals) xluc_param.set_param_vals(xluc_p_vals) ##################################### # Select reflections for refinement # ##################################### refman = ReflectionManager(obs_refs, experiments_single_panel) refman2 = ReflectionManager(obs_refs, experiments_multi_panel) ############################### # Set up the target functions # ############################### mytarget = LeastSquaresPositionalResidualWithRmsdCutoff( experiments_single_panel, ScansExperimentsPredictor(experiments_single_panel), refman, pred_param, restraints_parameterisation=None, ) mytarget2 = LeastSquaresPositionalResidualWithRmsdCutoff( experiments_multi_panel, ScansExperimentsPredictor(experiments_multi_panel), refman2, pred_param2, restraints_parameterisation=None, ) ################################# # Set up the refinement engines # ################################# refiner = setup_minimiser.Extract(master_phil, mytarget, pred_param, cmdline_args=args).refiner refiner2 = setup_minimiser.Extract(master_phil, mytarget2, pred_param2, cmdline_args=args).refiner refiner.run() # reset parameters and run refinement with the multi panel detector s0_param.set_param_vals(s0_p_vals) multi_det_param.set_param_vals(det_p_vals) xlo_param.set_param_vals(xlo_p_vals) xluc_param.set_param_vals(xluc_p_vals) refiner2.run() # same number of steps assert refiner.get_num_steps() == refiner2.get_num_steps() # same rmsds for rmsd, rmsd2 in zip(refiner.history["rmsd"], refiner2.history["rmsd"]): assert approx_equal(rmsd, rmsd2) # same parameter values each step for params, params2 in zip(refiner.history["parameter_vector"], refiner.history["parameter_vector"]): assert approx_equal(params, params2)
def test(): # Python and cctbx imports from math import pi from scitbx import matrix from scitbx.array_family import flex from libtbx.phil import parse from libtbx.test_utils import approx_equal # Get modules to build models and minimiser using PHIL import dials.test.algorithms.refinement.setup_geometry as setup_geometry import dials.test.algorithms.refinement.setup_minimiser as setup_minimiser # We will set up a mock scan and a mock experiment list from dxtbx.model import ScanFactory from dxtbx.model.experiment_list import ExperimentList, Experiment # Model parameterisations from dials.algorithms.refinement.parameterisation.detector_parameters import ( DetectorParameterisationSinglePanel, ) from dials.algorithms.refinement.parameterisation.beam_parameters import ( BeamParameterisation, ) from dials.algorithms.refinement.parameterisation.crystal_parameters import ( CrystalOrientationParameterisation, CrystalUnitCellParameterisation, ) # Symmetry constrained parameterisation for the unit cell from cctbx.uctbx import unit_cell from rstbx.symmetry.constraints.parameter_reduction import symmetrize_reduce_enlarge # Reflection prediction from dials.algorithms.spot_prediction import IndexGenerator, ray_intersection from dials.algorithms.refinement.prediction.managed_predictors import ( ScansRayPredictor, ScansExperimentsPredictor, ) from cctbx.sgtbx import space_group, space_group_symbols # Parameterisation of the prediction equation from dials.algorithms.refinement.parameterisation.prediction_parameters import ( XYPhiPredictionParameterisation, ) # Imports for the target function from dials.algorithms.refinement.target import ( LeastSquaresPositionalResidualWithRmsdCutoff, ) from dials.algorithms.refinement.reflection_manager import ReflectionManager ############################# # Setup experimental models # ############################# override = """geometry.parameters { beam.wavelength.random=False beam.wavelength.value=1.0 beam.direction.inclination.random=False crystal.a.length.random=False crystal.a.length.value=12.0 crystal.a.direction.method=exactly crystal.a.direction.exactly.direction=1.0 0.002 -0.004 crystal.b.length.random=False crystal.b.length.value=14.0 crystal.b.direction.method=exactly crystal.b.direction.exactly.direction=-0.002 1.0 0.002 crystal.c.length.random=False crystal.c.length.value=13.0 crystal.c.direction.method=exactly crystal.c.direction.exactly.direction=0.002 -0.004 1.0 detector.directions.method=exactly detector.directions.exactly.dir1=0.99 0.002 -0.004 detector.directions.exactly.norm=0.002 -0.001 0.99 detector.centre.method=exactly detector.centre.exactly.value=1.0 -0.5 199.0 }""" master_phil = parse( """ include scope dials.test.algorithms.refinement.geometry_phil include scope dials.test.algorithms.refinement.minimiser_phil """, process_includes=True, ) models = setup_geometry.Extract(master_phil, local_overrides=override, verbose=False) mydetector = models.detector mygonio = models.goniometer mycrystal = models.crystal mybeam = models.beam ########################### # Parameterise the models # ########################### det_param = DetectorParameterisationSinglePanel(mydetector) s0_param = BeamParameterisation(mybeam, mygonio) xlo_param = CrystalOrientationParameterisation(mycrystal) xluc_param = CrystalUnitCellParameterisation(mycrystal) # Fix beam to the X-Z plane (imgCIF geometry), fix wavelength s0_param.set_fixed([True, False, True]) ######################################################################## # Link model parameterisations together into a parameterisation of the # # prediction equation # ######################################################################## # Build a mock scan for a 180 degree sweep sf = ScanFactory() myscan = sf.make_scan( image_range=(1, 1800), exposure_times=0.1, oscillation=(0, 0.1), epochs=list(range(1800)), deg=True, ) # Build an ExperimentList experiments = ExperimentList() experiments.append( Experiment( beam=mybeam, detector=mydetector, goniometer=mygonio, scan=myscan, crystal=mycrystal, imageset=None, )) # Create the PredictionParameterisation pred_param = XYPhiPredictionParameterisation(experiments, [det_param], [s0_param], [xlo_param], [xluc_param]) ################################ # Apply known parameter shifts # ################################ # shift detector by 1.0 mm each translation and 4 mrad each rotation det_p_vals = det_param.get_param_vals() p_vals = [ a + b for a, b in zip(det_p_vals, [1.0, 1.0, 1.0, 4.0, 4.0, 4.0]) ] det_param.set_param_vals(p_vals) # shift beam by 4 mrad in free axis s0_p_vals = s0_param.get_param_vals() p_vals = list(s0_p_vals) p_vals[0] += 4.0 s0_param.set_param_vals(p_vals) # rotate crystal a bit (=3 mrad each rotation) xlo_p_vals = xlo_param.get_param_vals() p_vals = [a + b for a, b in zip(xlo_p_vals, [3.0, 3.0, 3.0])] xlo_param.set_param_vals(p_vals) # change unit cell a bit (=0.1 Angstrom length upsets, 0.1 degree of # alpha and beta angles) xluc_p_vals = xluc_param.get_param_vals() cell_params = mycrystal.get_unit_cell().parameters() cell_params = [ a + b for a, b in zip(cell_params, [0.1, -0.1, 0.1, 0.1, -0.1, 0.0]) ] new_uc = unit_cell(cell_params) newB = matrix.sqr(new_uc.fractionalization_matrix()).transpose() S = symmetrize_reduce_enlarge(mycrystal.get_space_group()) S.set_orientation(orientation=newB) X = tuple([e * 1.0e5 for e in S.forward_independent_parameters()]) xluc_param.set_param_vals(X) ############################# # Generate some reflections # ############################# # All indices in a 2.0 Angstrom sphere resolution = 2.0 index_generator = IndexGenerator( mycrystal.get_unit_cell(), space_group(space_group_symbols(1).hall()).type(), resolution, ) indices = index_generator.to_array() sweep_range = myscan.get_oscillation_range(deg=False) im_width = myscan.get_oscillation(deg=False)[1] assert sweep_range == (0.0, pi) assert approx_equal(im_width, 0.1 * pi / 180.0) # Predict rays within the sweep range ray_predictor = ScansRayPredictor(experiments, sweep_range) obs_refs = ray_predictor(indices) # Take only those rays that intersect the detector intersects = ray_intersection(mydetector, obs_refs) obs_refs = obs_refs.select(intersects) # Make a reflection predictor and re-predict for all these reflections. The # result is the same, but we gain also the flags and xyzcal.px columns ref_predictor = ScansExperimentsPredictor(experiments) obs_refs["id"] = flex.int(len(obs_refs), 0) obs_refs = ref_predictor(obs_refs) # Set 'observed' centroids from the predicted ones obs_refs["xyzobs.mm.value"] = obs_refs["xyzcal.mm"] # Invent some variances for the centroid positions of the simulated data im_width = 0.1 * pi / 180.0 px_size = mydetector[0].get_pixel_size() var_x = flex.double(len(obs_refs), (px_size[0] / 2.0)**2) var_y = flex.double(len(obs_refs), (px_size[1] / 2.0)**2) var_phi = flex.double(len(obs_refs), (im_width / 2.0)**2) obs_refs["xyzobs.mm.variance"] = flex.vec3_double(var_x, var_y, var_phi) # The total number of observations should be 1128 assert len(obs_refs) == 1128 ############################### # Undo known parameter shifts # ############################### s0_param.set_param_vals(s0_p_vals) det_param.set_param_vals(det_p_vals) xlo_param.set_param_vals(xlo_p_vals) xluc_param.set_param_vals(xluc_p_vals) ##################################### # Select reflections for refinement # ##################################### refman = ReflectionManager(obs_refs, experiments, outlier_detector=None, close_to_spindle_cutoff=0.1) ############################## # Set up the target function # ############################## # The current 'achieved' criterion compares RMSD against 1/3 the pixel size and # 1/3 the image width in radians. For the simulated data, these are just made up mytarget = LeastSquaresPositionalResidualWithRmsdCutoff( experiments, ref_predictor, refman, pred_param, restraints_parameterisation=None) ###################################### # Set up the LSTBX refinement engine # ###################################### overrides = """minimiser.parameters.engine=GaussNewton minimiser.parameters.logfile=None""" refiner = setup_minimiser.Extract(master_phil, mytarget, pred_param, local_overrides=overrides).refiner refiner.run() assert mytarget.achieved() assert refiner.get_num_steps() == 1 assert approx_equal( mytarget.rmsds(), (0.00508252354876, 0.00420954552156, 8.97303428289e-05)) ############################### # Undo known parameter shifts # ############################### s0_param.set_param_vals(s0_p_vals) det_param.set_param_vals(det_p_vals) xlo_param.set_param_vals(xlo_p_vals) xluc_param.set_param_vals(xluc_p_vals) ###################################################### # Set up the LBFGS with curvatures refinement engine # ###################################################### overrides = """minimiser.parameters.engine=LBFGScurvs minimiser.parameters.logfile=None""" refiner = setup_minimiser.Extract(master_phil, mytarget, pred_param, local_overrides=overrides).refiner refiner.run() assert mytarget.achieved() assert refiner.get_num_steps() == 9 assert approx_equal(mytarget.rmsds(), (0.0558857700305, 0.0333446685335, 0.000347402754278))
# The current 'achieved' criterion compares RMSD against 1/3 the pixel size and # 1/3 the image width in radians. For the simulated data, these are just made up mytarget = LeastSquaresPositionalResidualWithRmsdCutoff( experiments, ref_predictor, refman, pred_param, restraints_parameterisation=None) ################################ # Set up the refinement engine # ################################ refiner = setup_minimiser.Extract(master_phil, mytarget, pred_param, cmdline_args=args).refiner print("Prior to refinement the experimental model is:") print(mybeam) print(mydetector) print(mycrystal) # get a CS-PAD detector for testing import os import libtbx.load_env dials_regression = libtbx.env.find_in_repositories( relative_path="dials_regression", test=os.path.isdir) data_dir = os.path.join(dials_regression, "refinement_test_data", "hierarchy_test")
def test(init_test): single_panel_detector = init_test.experiments_single_panel.detectors()[0] multi_panel_detector = init_test.experiments_multi_panel.detectors()[0] beam = init_test.experiments_single_panel.beams()[0] gonio = init_test.experiments_single_panel.goniometers()[0] crystal = init_test.experiments_single_panel.crystals()[0] # Parameterise the models det_param = DetectorParameterisationSinglePanel(single_panel_detector) s0_param = BeamParameterisation(beam, gonio) xlo_param = CrystalOrientationParameterisation(crystal) xluc_param = CrystalUnitCellParameterisation(crystal) multi_det_param = DetectorParameterisationMultiPanel(multi_panel_detector, beam) # Fix beam to the X-Z plane (imgCIF geometry), fix wavelength s0_param.set_fixed([True, False, True]) # Link model parameterisations together into a parameterisation of the # prediction equation, first for the single panel detector pred_param = XYPhiPredictionParameterisation( init_test.experiments_single_panel, [det_param], [s0_param], [xlo_param], [xluc_param], ) # ... and now for the multi-panel detector pred_param2 = XYPhiPredictionParameterisation( init_test.experiments_multi_panel, [multi_det_param], [s0_param], [xlo_param], [xluc_param], ) ################################ # Apply known parameter shifts # ################################ # shift detectors by 1.0 mm each translation and 2 mrad each rotation det_p_vals = det_param.get_param_vals() p_vals = [a + b for a, b in zip(det_p_vals, [1.0, 1.0, 1.0, 2.0, 2.0, 2.0])] det_param.set_param_vals(p_vals) multi_det_p_vals = multi_det_param.get_param_vals() p_vals = [a + b for a, b in zip(multi_det_p_vals, [1.0, 1.0, 1.0, 2.0, 2.0, 2.0])] multi_det_param.set_param_vals(p_vals) # shift beam by 2 mrad in free axis s0_p_vals = s0_param.get_param_vals() p_vals = list(s0_p_vals) p_vals[0] += 2.0 s0_param.set_param_vals(p_vals) # rotate crystal a bit (=2 mrad each rotation) xlo_p_vals = xlo_param.get_param_vals() p_vals = [a + b for a, b in zip(xlo_p_vals, [2.0, 2.0, 2.0])] xlo_param.set_param_vals(p_vals) # change unit cell a bit (=0.1 Angstrom length upsets, 0.1 degree of # gamma angle) xluc_p_vals = xluc_param.get_param_vals() cell_params = crystal.get_unit_cell().parameters() cell_params = [a + b for a, b in zip(cell_params, [0.1, 0.1, 0.1, 0.0, 0.0, 0.1])] new_uc = unit_cell(cell_params) newB = matrix.sqr(new_uc.fractionalization_matrix()).transpose() S = symmetrize_reduce_enlarge(crystal.get_space_group()) S.set_orientation(orientation=newB) X = tuple([e * 1.0e5 for e in S.forward_independent_parameters()]) xluc_param.set_param_vals(X) ############################### # Undo known parameter shifts # ############################### s0_param.set_param_vals(s0_p_vals) det_param.set_param_vals(det_p_vals) multi_det_param.set_param_vals(det_p_vals) xlo_param.set_param_vals(xlo_p_vals) xluc_param.set_param_vals(xluc_p_vals) ##################################### # Select reflections for refinement # ##################################### refman = ReflectionManager( init_test.observations_single_panel, init_test.experiments_single_panel ) refman2 = ReflectionManager( init_test.observations_multi_panel, init_test.experiments_multi_panel ) ############################### # Set up the target functions # ############################### target = LeastSquaresPositionalResidualWithRmsdCutoff( init_test.experiments_single_panel, ScansExperimentsPredictor(init_test.experiments_single_panel), refman, pred_param, restraints_parameterisation=None, ) target2 = LeastSquaresPositionalResidualWithRmsdCutoff( init_test.experiments_multi_panel, ScansExperimentsPredictor(init_test.experiments_multi_panel), refman2, pred_param2, restraints_parameterisation=None, ) ################################# # Set up the refinement engines # ################################# refiner = setup_minimiser.Extract(master_phil, target, pred_param).refiner refiner2 = setup_minimiser.Extract(master_phil, target2, pred_param2).refiner refiner.run() # reset parameters and run refinement with the multi panel detector s0_param.set_param_vals(s0_p_vals) multi_det_param.set_param_vals(det_p_vals) xlo_param.set_param_vals(xlo_p_vals) xluc_param.set_param_vals(xluc_p_vals) refiner2.run() # same number of steps assert refiner.get_num_steps() == refiner2.get_num_steps() # same rmsds for rmsd, rmsd2 in zip(refiner.history["rmsd"], refiner2.history["rmsd"]): assert approx_equal(rmsd, rmsd2) # same parameter values each step for params, params2 in zip( refiner.history["parameter_vector"], refiner.history["parameter_vector"] ): assert approx_equal(params, params2)
############################## # The current 'achieved' criterion compares RMSD against 1/3 the pixel size and # 1/3 the image width in radians. For the simulated data, these are just made up mytarget = LeastSquaresPositionalResidualWithRmsdCutoff(experiments, ref_predictor, refman, pred_param, restraints_parameterisation=None) ###################################### # Set up the LSTBX refinement engine # ###################################### overrides="""minimiser.parameters.engine=GaussNewton minimiser.parameters.verbosity=0 minimiser.parameters.logfile=None""" refiner = setup_minimiser.Extract(master_phil, mytarget, pred_param, local_overrides = overrides).refiner refiner.run() assert mytarget.achieved() assert refiner.get_num_steps() == 1 assert approx_equal(mytarget.rmsds(), (0.00508252354876, 0.00420954552156, 8.97303428289e-05)) print "OK" ############################### # Undo known parameter shifts # ###############################
def test(args=[]): from math import pi from scitbx import matrix from scitbx.array_family import flex from libtbx.phil import parse from libtbx.test_utils import approx_equal # Get modules to build models and minimiser using PHIL import dials.test.algorithms.refinement.setup_geometry as setup_geometry import dials.test.algorithms.refinement.setup_minimiser as setup_minimiser # We will set up a mock scan and a mock experiment list from dxtbx.model import ScanFactory from dxtbx.model.experiment_list import ExperimentList, Experiment # Model parameterisations from dials.algorithms.refinement.parameterisation.detector_parameters import ( DetectorParameterisationSinglePanel, ) from dials.algorithms.refinement.parameterisation.beam_parameters import ( BeamParameterisation, ) from dials.algorithms.refinement.parameterisation.crystal_parameters import ( CrystalOrientationParameterisation, CrystalUnitCellParameterisation, ) # Symmetry constrained parameterisation for the unit cell from cctbx.uctbx import unit_cell from rstbx.symmetry.constraints.parameter_reduction import symmetrize_reduce_enlarge # Reflection prediction from dials.algorithms.spot_prediction import IndexGenerator from dials.algorithms.refinement.prediction.managed_predictors import ( ScansRayPredictor, ScansExperimentsPredictor, ) from dials.algorithms.spot_prediction import ray_intersection from cctbx.sgtbx import space_group, space_group_symbols # Parameterisation of the prediction equation from dials.algorithms.refinement.parameterisation.prediction_parameters import ( XYPhiPredictionParameterisation, ) # Imports for the target function from dials.algorithms.refinement.target import ( LeastSquaresPositionalResidualWithRmsdCutoff, ) from dials.algorithms.refinement.reflection_manager import ReflectionManager ############################# # Setup experimental models # ############################# master_phil = parse( """ include scope dials.test.algorithms.refinement.geometry_phil include scope dials.test.algorithms.refinement.minimiser_phil """, process_includes=True, ) models = setup_geometry.Extract(master_phil, cmdline_args=args) mydetector = models.detector mygonio = models.goniometer mycrystal = models.crystal mybeam = models.beam # Build a mock scan for a 180 degree sequence sf = ScanFactory() myscan = sf.make_scan( image_range=(1, 1800), exposure_times=0.1, oscillation=(0, 0.1), epochs=list(range(1800)), deg=True, ) sequence_range = myscan.get_oscillation_range(deg=False) im_width = myscan.get_oscillation(deg=False)[1] assert sequence_range == (0.0, pi) assert approx_equal(im_width, 0.1 * pi / 180.0) # Build an experiment list experiments = ExperimentList() experiments.append( Experiment( beam=mybeam, detector=mydetector, goniometer=mygonio, scan=myscan, crystal=mycrystal, imageset=None, )) ########################### # Parameterise the models # ########################### det_param = DetectorParameterisationSinglePanel(mydetector) s0_param = BeamParameterisation(mybeam, mygonio) xlo_param = CrystalOrientationParameterisation(mycrystal) xluc_param = CrystalUnitCellParameterisation(mycrystal) # Fix beam to the X-Z plane (imgCIF geometry), fix wavelength s0_param.set_fixed([True, False, True]) # Fix crystal parameters # xluc_param.set_fixed([True, True, True, True, True, True]) ######################################################################## # Link model parameterisations together into a parameterisation of the # # prediction equation # ######################################################################## pred_param = XYPhiPredictionParameterisation(experiments, [det_param], [s0_param], [xlo_param], [xluc_param]) ################################ # Apply known parameter shifts # ################################ # shift detector by 1.0 mm each translation and 2 mrad each rotation det_p_vals = det_param.get_param_vals() p_vals = [ a + b for a, b in zip(det_p_vals, [1.0, 1.0, 1.0, 2.0, 2.0, 2.0]) ] det_param.set_param_vals(p_vals) # shift beam by 2 mrad in free axis s0_p_vals = s0_param.get_param_vals() p_vals = list(s0_p_vals) p_vals[0] += 2.0 s0_param.set_param_vals(p_vals) # rotate crystal a bit (=2 mrad each rotation) xlo_p_vals = xlo_param.get_param_vals() p_vals = [a + b for a, b in zip(xlo_p_vals, [2.0, 2.0, 2.0])] xlo_param.set_param_vals(p_vals) # change unit cell a bit (=0.1 Angstrom length upsets, 0.1 degree of # gamma angle) xluc_p_vals = xluc_param.get_param_vals() cell_params = mycrystal.get_unit_cell().parameters() cell_params = [ a + b for a, b in zip(cell_params, [0.1, 0.1, 0.1, 0.0, 0.0, 0.1]) ] new_uc = unit_cell(cell_params) newB = matrix.sqr(new_uc.fractionalization_matrix()).transpose() S = symmetrize_reduce_enlarge(mycrystal.get_space_group()) S.set_orientation(orientation=newB) X = tuple([e * 1.0e5 for e in S.forward_independent_parameters()]) xluc_param.set_param_vals(X) ############################# # Generate some reflections # ############################# print("Reflections will be generated with the following geometry:") print(mybeam) print(mydetector) print(mycrystal) print("Target values of parameters are") msg = "Parameters: " + "%.5f " * len(pred_param) print(msg % tuple(pred_param.get_param_vals())) print() # All indices in a 2.0 Angstrom sphere resolution = 2.0 index_generator = IndexGenerator( mycrystal.get_unit_cell(), space_group(space_group_symbols(1).hall()).type(), resolution, ) indices = index_generator.to_array() # Predict rays within the sequence range ray_predictor = ScansRayPredictor(experiments, sequence_range) obs_refs = ray_predictor(indices) print("Total number of reflections excited", len(obs_refs)) # Take only those rays that intersect the detector intersects = ray_intersection(mydetector, obs_refs) obs_refs = obs_refs.select(intersects) # Make a reflection predictor and re-predict for all these reflections. The # result is the same, but we gain also the flags and xyzcal.px columns ref_predictor = ScansExperimentsPredictor(experiments) obs_refs["id"] = flex.int(len(obs_refs), 0) obs_refs = ref_predictor(obs_refs) # Set 'observed' centroids from the predicted ones obs_refs["xyzobs.mm.value"] = obs_refs["xyzcal.mm"] # Invent some variances for the centroid positions of the simulated data im_width = 0.1 * pi / 180.0 px_size = mydetector[0].get_pixel_size() var_x = flex.double(len(obs_refs), (px_size[0] / 2.0)**2) var_y = flex.double(len(obs_refs), (px_size[1] / 2.0)**2) var_phi = flex.double(len(obs_refs), (im_width / 2.0)**2) obs_refs["xyzobs.mm.variance"] = flex.vec3_double(var_x, var_y, var_phi) print("Total number of observations made", len(obs_refs)) ############################### # Undo known parameter shifts # ############################### s0_param.set_param_vals(s0_p_vals) det_param.set_param_vals(det_p_vals) xlo_param.set_param_vals(xlo_p_vals) xluc_param.set_param_vals(xluc_p_vals) print("Initial values of parameters are") msg = "Parameters: " + "%.5f " * len(pred_param) print(msg % tuple(pred_param.get_param_vals())) print() ##################################### # Select reflections for refinement # ##################################### refman = ReflectionManager(obs_refs, experiments) ############################## # Set up the target function # ############################## # The current 'achieved' criterion compares RMSD against 1/3 the pixel size and # 1/3 the image width in radians. For the simulated data, these are just made up mytarget = LeastSquaresPositionalResidualWithRmsdCutoff( experiments, ref_predictor, refman, pred_param, restraints_parameterisation=None) ################################ # Set up the refinement engine # ################################ refiner = setup_minimiser.Extract(master_phil, mytarget, pred_param, cmdline_args=args).refiner print("Prior to refinement the experimental model is:") print(mybeam) print(mydetector) print(mycrystal) refiner.run() print() print("Refinement has completed with the following geometry:") print(mybeam) print(mydetector) print(mycrystal)