transform_mode_shrink_fatten.c

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/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 */
 
#include <stdlib.h>
 
#include "BLI_math.h"
#include "BLI_string.h"
 
#include "BKE_context.h"
#include "BKE_unit.h"
 
#include "ED_screen.h"
 
#include "WM_api.h"
#include "WM_types.h"
 
#include "UI_interface.h"
 
#include "BLT_translation.h"
 
#include "transform.h"
#include "transform_mode.h"
#include "transform_snap.h"
 
/* -------------------------------------------------------------------- */
static eRedrawFlag shrinkfatten_handleEvent(struct TransInfo *t, const wmEvent *event)
{
  BLI_assert(t->mode == TFM_SHRINKFATTEN);
  const wmKeyMapItem *kmi = t->custom.mode.data;
  if (kmi && event->type == kmi->type && event->val == kmi->val) {
    /* Allows the "Even Thickness" effect to be enabled as a toggle. */
    t->flag ^= T_ALT_TRANSFORM;
    return TREDRAW_HARD;
  }
  return TREDRAW_NOTHING;
}
 
static void applyShrinkFatten(TransInfo *t, const int UNUSED(mval[2]))
{
  float distance;
  int i;
  char str[UI_MAX_DRAW_STR];
  size_t ofs = 0;
  UnitSettings *unit = &t->scene->unit;
 
  distance = t->values[0];
 
  transform_snap_increment(t, &distance);
 
  applyNumInput(&t->num, &distance);
 
  t->values_final[0] = distance;
 
  /* header print for NumInput */
  ofs += BLI_strncpy_rlen(str + ofs, TIP_("Shrink/Fatten: "), sizeof(str) - ofs);
  if (hasNumInput(&t->num)) {
    char c[NUM_STR_REP_LEN];
    outputNumInput(&(t->num), c, unit);
    ofs += BLI_snprintf(str + ofs, sizeof(str) - ofs, "%s", c);
  }
  else {
    /* default header print */
    if (unit != NULL) {
      ofs += BKE_unit_value_as_string(str + ofs,
                                      sizeof(str) - ofs,
                                      distance * unit->scale_length,
                                      4,
                                      B_UNIT_LENGTH,
                                      unit,
                                      true);
    }
    else {
      ofs += BLI_snprintf(str + ofs, sizeof(str) - ofs, "%.4f", distance);
    }
  }
 
  if (t->proptext[0]) {
    ofs += BLI_snprintf(str + ofs, sizeof(str) - ofs, " %s", t->proptext);
  }
  ofs += BLI_strncpy_rlen(str + ofs, ", (", sizeof(str) - ofs);
 
  const wmKeyMapItem *kmi = t->custom.mode.data;
  if (kmi) {
    ofs += WM_keymap_item_to_string(kmi, false, str + ofs, sizeof(str) - ofs);
  }
 
  BLI_snprintf(str + ofs,
               sizeof(str) - ofs,
               TIP_(" or Alt) Even Thickness %s"),
               WM_bool_as_string((t->flag & T_ALT_TRANSFORM) != 0));
  /* done with header string */
 
  FOREACH_TRANS_DATA_CONTAINER (t, tc) {
    TransData *td = tc->data;
    for (i = 0; i < tc->data_len; i++, td++) {
      float tdistance; /* temp dist */
      if (td->flag & TD_SKIP) {
        continue;
      }
 
      /* get the final offset */
      tdistance = distance * td->factor;
      if (td->ext && (t->flag & T_ALT_TRANSFORM) != 0) {
        tdistance *= td->ext->isize[0]; /* shell factor */
      }
 
      madd_v3_v3v3fl(td->loc, td->iloc, td->axismtx[2], tdistance);
    }
  }
 
  recalcData(t);
 
  ED_area_status_text(t->area, str);
}
 
void initShrinkFatten(TransInfo *t)
{
  /* If not in mesh edit mode, fallback to Resize. */
  if ((t->flag & T_EDIT) == 0 || (t->obedit_type != OB_MESH)) {
    initResize(t);
  }
  else {
    t->mode = TFM_SHRINKFATTEN;
    t->transform = applyShrinkFatten;
    t->handleEvent = shrinkfatten_handleEvent;
 
    initMouseInputMode(t, &t->mouse, INPUT_VERTICAL_ABSOLUTE);
 
    t->idx_max = 0;
    t->num.idx_max = 0;
    t->snap[0] = 1.0f;
    t->snap[1] = t->snap[0] * 0.1f;
 
    copy_v3_fl(t->num.val_inc, t->snap[0]);
    t->num.unit_sys = t->scene->unit.system;
    t->num.unit_type[0] = B_UNIT_LENGTH;
 
    t->flag |= T_NO_CONSTRAINT;
 
    if (t->keymap) {
      /* Workaround to use the same key as the modal keymap. */
      t->custom.mode.data = (void *)WM_modalkeymap_find_propvalue(t->keymap, TFM_MODAL_RESIZE);
    }
  }
}