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SwRI can revise these Terms at any time * without notice by updating this posting. * * Trademarks * * The SwRI logo is a trademark of SwRI in the United States and other countries. * */ #ident "@(#) least_phi.c 1.17 05/08/19 SwRI" #include "libtrec_idfs.h" #include "libIDFSFill.h" /******************************************************************************* * * * IR_LEAST_FIT_PHI SUBROUTINE * * * * DESCRIPTION * * This routine is called in order to perform a least square's fit on the * * phi data matrix. This routine will process all units, one unit at a time. * * In addition, this routine will process all theta groups, one theta group * * at a time. * * * * INPUT VARIABLES * * SDDAS_CHAR cyclic flag indicating if the data is cyclic * * SDDAS_SHORT order the order of the fit (1, 2, 3, etc) * * SDDAS_LONG need_filled number of filled bins needed to perform the * * calculations to determine the missing bins * * SDDAS_FLOAT tension the weighting of the data * * SDDAS_CHAR cur_buf the buffer being processed (0 - 4) * * * * USAGE * * ir_least_fit_phi (cyclic, order, need_filled, tension, cur_buf) * * * * NECESSARY SUBPROGRAMS * * IDFSFill_two_d_cyc () performs a 2-D least square's fit for cyclic * * data * * IDFSFill_two_d_ncyc () performs a 2-D least square's fit for non- * * cyclic data * * * * EXTERNAL VARIABLES * * struct general_info structure that holds information concerning * * ginfo the experiment that is being processed * * * * INTERNAL VARIABLES * * struct experiment_info a pointer to the structure that holds * * *ex specific experiment information * * struct collapse_data pointer to the collapse_data structure * * *cptr being processed * * struct bin_info *bptr a pointer to the structure holding sweep * * binning information * * register SDDAS_FLOAT *dptr pointer to the data array * * register SDDAS_SHORT unit looping variable for data levels (units) * * register SDDAS_SHORT theta looping variable for theta bins * * reg SDDAS_CHAR *bin_stat pointer to the bin status array * * register SDDAS_LONG step looping variable to process all bins * * SDDAS_FLOAT *base_4d base pointer to phi matrix being processed * * SDDAS_LONG offset_theta offset to get to the theta column being * * processed in the input data matrix * * SDDAS_LONG offset_unit offset to get to the beginning of the data * * matrix for the data level being processed * * SDDAS_LONG row, col the current row/column being processed * * SDDAS_LONG phi_bins the number of phi bins * * SDDAS_LONG num_steps the number of sweep bins * * SDDAS_LONG all_elements the number of elements in the data block * * SDDAS_LONG all_theta_block no. of elements to get to next theta group * * SDDAS_SHORT num_theta the number of theta bins * * SDDAS_CHAR *base_bin_stat ptr to bin stat for phi being processed * * * * SUBSYSTEM * * Display Level * * * ******************************************************************************/ void ir_least_fit_phi (SDDAS_CHAR cyclic, SDDAS_SHORT order, SDDAS_LONG need_filled, SDDAS_FLOAT tension, SDDAS_CHAR cur_buf) { extern struct general_info ginfo; struct experiment_info *ex; struct collapse_data *cptr; struct bin_info *bptr; register SDDAS_FLOAT *dptr; register SDDAS_SHORT unit, theta; register SDDAS_CHAR *bin_stat; register SDDAS_LONG step; SDDAS_FLOAT *base_4d; SDDAS_LONG offset_theta, offset_unit, row, col, phi_bins, num_steps; SDDAS_LONG all_elements, all_theta_block; SDDAS_SHORT num_theta; SDDAS_CHAR *base_bin_stat; /************************************************************************/ /* Initialize pointers to the beginning of the phi matrix. */ /************************************************************************/ ex = ginfo.expt; bptr = ex->bin_ptr; cptr = ex->collapse_ptr; num_theta = (cptr->theta_bins <= 0) ? ex->num_sensor : cptr->theta_bins; phi_bins = (SDDAS_LONG) cptr->phi_bins; num_steps = (SDDAS_LONG) bptr->num_bins; all_elements = num_steps * num_theta * phi_bins; all_theta_block = num_steps * phi_bins; base_4d = *(cptr->data_4d_ptr + cur_buf); base_bin_stat = *(cptr->bin_stat_ptr + cur_buf); /**********************************************************************/ /* Process one unit at a time. */ /**********************************************************************/ offset_unit = 0; for (unit = 0; unit < cptr->num_units; ++unit, offset_unit += all_elements) { /********************************************************************/ /* Process one theta group at a time. */ /********************************************************************/ offset_theta = 0; for (theta = 0; theta < num_theta; ++theta, offset_theta += all_theta_block) { dptr = base_4d + offset_unit + offset_theta; bin_stat = base_bin_stat + offset_unit + offset_theta; /*******************************************************************/ /* Process all steps of all phi bins. Always send in the top */ /* left-hand corner of the theta group to the ir_two_d modules. */ /*******************************************************************/ for (step = 0; step < all_theta_block; ++step) { if (*(bin_stat + step) == 0) { row = step % num_steps; col = step / num_steps; if (cyclic) *(dptr + step) = IDFSFill_two_d_cyc (bin_stat, dptr, phi_bins, num_steps, row, col, need_filled, tension, order); else *(dptr + step) = IDFSFill_two_d_ncyc (bin_stat, dptr, phi_bins, num_steps, row, col, need_filled, tension, order); } } } } }