text: /*                         V 2 M _ P O I N T . C
   * BRL-CAD
   *
   * Copyright (c) 2008-2014 United States Government as represented by
   * the U.S. Army Research Laboratory.
   *
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public License
   * version 2.1 as published by the Free Software Foundation.
   *
   * This library is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this file; see the file named COPYING for more
   * information.
   */
  /** @file libged/v2m_point.c
   *
   * The v2m_point command.
   *
   */
  
  #include "common.h"
  
  #include <stdlib.h>
  #include <ctype.h>
  #include <string.h>
  #include "bio.h"
  
  #include "./ged_private.h"
  
  
  int
  ged_v2m_point(struct ged *gedp, int argc, const char *argv[])
  {
      point_t view;
      point_t model;
      static const char *usage = "x y z";
  
      GED_CHECK_DATABASE_OPEN(gedp, GED_ERROR);
      GED_CHECK_VIEW(gedp, GED_ERROR);
      GED_CHECK_ARGC_GT_0(gedp, argc, GED_ERROR);
  
      /* initialize result */
      bu_vls_trunc(gedp->ged_result_str, 0);
  
      /* must be wanting help */
      if (argc == 1) {
  	bu_vls_printf(gedp->ged_result_str, "Usage: %s %s", argv[0], usage);
  	return GED_HELP;
      }
  
      if (argc != 2 && argc != 4) {
  	bu_vls_printf(gedp->ged_result_str, "Usage: %s %s", argv[0], usage);
  	return GED_ERROR;
      }
  
      if (argc == 2) {
  	if (bn_decode_vect(view, argv[1]) != 3) {
  	    bu_vls_printf(gedp->ged_result_str, "Usage: %s %s", argv[0], usage);
  	    return GED_ERROR;
  	}
      } else {
  	double scan[3];
  
  	if (sscanf(argv[1], "%lf", &scan[X]) != 1) {
  	    bu_vls_printf(gedp->ged_result_str, "ged_m2v_point: bad X value - %s\n", argv[1]);
  	    return GED_ERROR;
  	}
  
  	if (sscanf(argv[2], "%lf", &scan[Y]) != 1) {
  	    bu_vls_printf(gedp->ged_result_str, "ged_m2v_point: bad Y value - %s\n", argv[2]);
  	    return GED_ERROR;
  	}
  
  	if (sscanf(argv[3], "%lf", &scan[Z]) != 1) {
  	    bu_vls_printf(gedp->ged_result_str, "ged_m2v_point: bad Z value - %s\n", argv[3]);
  	    return GED_ERROR;
  	}
  
  	/* convert from double to fastf_t */
  	VMOVE(view, scan);
      }
  
      /* Convert the incoming view point to a model point */
      MAT4X3PNT(model, gedp->ged_gvp->gv_view2model, view);
      bn_encode_vect(gedp->ged_result_str, model);
  
      return GED_OK;
  }
  
  
  /*
   * Local Variables:
   * tab-width: 8
   * mode: C
   * indent-tabs-mode: t
   * c-file-style: "stroustrup"
   * End:
   * ex: shiftwidth=4 tabstop=8
   */
  