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blender-archive/source/blender/draw/modes/edit_mesh_mode_text.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.
*
* Copyright 2016, Blender Foundation.
*/
/** \file
* \ingroup draw
*/
#include "BLI_math.h"
#include "BLI_string.h"
#include "BKE_editmesh.h"
#include "BKE_global.h"
#include "BKE_unit.h"
#include "ED_view3d.h"
#include "DNA_mesh_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"
#include "DNA_screen_types.h"
#include "DNA_view3d_types.h"
#include "UI_resources.h"
#include "draw_manager_text.h"
#include "edit_mesh_mode_intern.h" /* own include */
/* Copied from drawobject.c */
void DRW_edit_mesh_mode_text_measure_stats(
ARegion *ar, View3D *v3d,
Object *ob, const UnitSettings *unit)
{
/* Do not use ascii when using non-default unit system, some unit chars are utf8 (micro, square, etc.).
* See bug #36090.
*/
struct DRWTextStore *dt = DRW_text_cache_ensure();
const short txt_flag = DRW_TEXT_CACHE_GLOBALSPACE | (unit->system ? 0 : DRW_TEXT_CACHE_ASCII);
Mesh *me = ob->data;
BMEditMesh *em = me->edit_mesh;
float v1[3], v2[3], v3[3], vmid[3], fvec[3];
char numstr[32]; /* Stores the measurement display text here */
size_t numstr_len;
const char *conv_float; /* Use a float conversion matching the grid size */
uchar col[4] = {0, 0, 0, 255}; /* color of the text to draw */
float area; /* area of the face */
float grid = unit->system ? unit->scale_length : v3d->grid;
const bool do_global = (v3d->flag & V3D_GLOBAL_STATS) != 0;
const bool do_moving = (G.moving & G_TRANSFORM_EDIT) != 0;
/* when 2 edge-info options are enabled, space apart */
const bool do_edge_textpair = (v3d->overlay.edit_flag & V3D_OVERLAY_EDIT_EDGE_LEN) && (v3d->overlay.edit_flag & V3D_OVERLAY_EDIT_EDGE_ANG);
const short edge_texpair_sep = (short)(5.0f * U.ui_scale);
float clip_planes[4][4];
/* allow for displaying shape keys and deform mods */
BMIter iter;
/* make the precision of the display value proportionate to the gridsize */
if (grid <= 0.01f) { conv_float = "%.6g"; }
else if (grid <= 0.1f) { conv_float = "%.5g"; }
else if (grid <= 1.0f) { conv_float = "%.4g"; }
else if (grid <= 10.0f) { conv_float = "%.3g"; }
else { conv_float = "%.2g"; }
if (v3d->overlay.edit_flag & (V3D_OVERLAY_EDIT_EDGE_LEN | V3D_OVERLAY_EDIT_EDGE_ANG | V3D_OVERLAY_EDIT_INDICES)) {
BoundBox bb;
const rcti rect = {0, ar->winx, 0, ar->winy};
ED_view3d_clipping_calc(&bb, clip_planes, ar, em->ob, &rect);
}
if (v3d->overlay.edit_flag & V3D_OVERLAY_EDIT_EDGE_LEN) {
BMEdge *eed;
UI_GetThemeColor3ubv(TH_DRAWEXTRA_EDGELEN, col);
BM_ITER_MESH (eed, &iter, em->bm, BM_EDGES_OF_MESH) {
/* draw selected edges, or edges next to selected verts while dragging */
if (BM_elem_flag_test(eed, BM_ELEM_SELECT) ||
(do_moving && (BM_elem_flag_test(eed->v1, BM_ELEM_SELECT) ||
BM_elem_flag_test(eed->v2, BM_ELEM_SELECT))))
{
float v1_clip[3], v2_clip[3];
copy_v3_v3(v1, eed->v1->co);
copy_v3_v3(v2, eed->v2->co);
if (clip_segment_v3_plane_n(v1, v2, clip_planes, 4, v1_clip, v2_clip)) {
mid_v3_v3v3(vmid, v1_clip, v2_clip);
mul_m4_v3(ob->obmat, vmid);
if (do_global) {
mul_mat3_m4_v3(ob->obmat, v1);
mul_mat3_m4_v3(ob->obmat, v2);
}
if (unit->system) {
numstr_len = bUnit_AsString2(
numstr, sizeof(numstr), len_v3v3(v1, v2) * unit->scale_length, 3,
B_UNIT_LENGTH, unit, false);
}
else {
numstr_len = BLI_snprintf_rlen(numstr, sizeof(numstr), conv_float, len_v3v3(v1, v2));
}
DRW_text_cache_add(dt, vmid, numstr, numstr_len, 0,
(do_edge_textpair) ? edge_texpair_sep : 0,
txt_flag, col);
}
}
}
}
if (v3d->overlay.edit_flag & V3D_OVERLAY_EDIT_EDGE_ANG) {
const bool is_rad = (unit->system_rotation == USER_UNIT_ROT_RADIANS);
BMEdge *eed;
UI_GetThemeColor3ubv(TH_DRAWEXTRA_EDGEANG, col);
BM_ITER_MESH (eed, &iter, em->bm, BM_EDGES_OF_MESH) {
BMLoop *l_a, *l_b;
if (BM_edge_loop_pair(eed, &l_a, &l_b)) {
/* draw selected edges, or edges next to selected verts while dragging */
if (BM_elem_flag_test(eed, BM_ELEM_SELECT) ||
(do_moving &&
(BM_elem_flag_test(eed->v1, BM_ELEM_SELECT) ||
BM_elem_flag_test(eed->v2, BM_ELEM_SELECT) ||
/* special case, this is useful to show when verts connected to
* this edge via a face are being transformed */
BM_elem_flag_test(l_a->next->next->v, BM_ELEM_SELECT) ||
BM_elem_flag_test(l_a->prev->v, BM_ELEM_SELECT) ||
BM_elem_flag_test(l_b->next->next->v, BM_ELEM_SELECT) ||
BM_elem_flag_test(l_b->prev->v, BM_ELEM_SELECT)
)))
{
float v1_clip[3], v2_clip[3];
copy_v3_v3(v1, eed->v1->co);
copy_v3_v3(v2, eed->v2->co);
if (clip_segment_v3_plane_n(v1, v2, clip_planes, 4, v1_clip, v2_clip)) {
float no_a[3], no_b[3];
float angle;
mid_v3_v3v3(vmid, v1_clip, v2_clip);
mul_m4_v3(ob->obmat, vmid);
copy_v3_v3(no_a, l_a->f->no);
copy_v3_v3(no_b, l_b->f->no);
if (do_global) {
mul_mat3_m4_v3(ob->imat, no_a);
mul_mat3_m4_v3(ob->imat, no_b);
normalize_v3(no_a);
normalize_v3(no_b);
}
angle = angle_normalized_v3v3(no_a, no_b);
numstr_len = BLI_snprintf_rlen(
numstr, sizeof(numstr), "%.3f%s", (is_rad) ? angle : RAD2DEGF(angle),
(is_rad) ? "r" : "°");
DRW_text_cache_add(dt, vmid, numstr, numstr_len, 0,
(do_edge_textpair) ? -edge_texpair_sep : 0,
txt_flag, col);
}
}
}
}
}
if (v3d->overlay.edit_flag & V3D_OVERLAY_EDIT_FACE_AREA) {
/* would be nice to use BM_face_calc_area, but that is for 2d faces
* so instead add up tessellation triangle areas */
UI_GetThemeColor3ubv(TH_DRAWEXTRA_FACEAREA, col);
int i, n, numtri;
BMFace *f = NULL;
BM_ITER_MESH_INDEX(f, &iter, em->bm, BM_FACES_OF_MESH, i) {
if (BM_elem_flag_test(f, BM_ELEM_SELECT)) {
n = 0;
numtri = f->len - 2;
area = 0;
zero_v3(vmid);
BMLoop *(*l)[3] = &em->looptris[poly_to_tri_count(i, BM_elem_index_get(f->l_first))];
for (int j = 0; j < numtri; j++) {
copy_v3_v3(v1, l[j][0]->v->co);
copy_v3_v3(v2, l[j][1]->v->co);
copy_v3_v3(v3, l[j][2]->v->co);
add_v3_v3(vmid, v1);
add_v3_v3(vmid, v2);
add_v3_v3(vmid, v3);
n += 3;
if (do_global) {
mul_mat3_m4_v3(ob->obmat, v1);
mul_mat3_m4_v3(ob->obmat, v2);
mul_mat3_m4_v3(ob->obmat, v3);
}
area += area_tri_v3(v1, v2, v3);
}
mul_v3_fl(vmid, 1.0f / (float)n);
mul_m4_v3(ob->obmat, vmid);
if (unit->system) {
numstr_len = bUnit_AsString2(
numstr, sizeof(numstr),
(double)(area * unit->scale_length * unit->scale_length),
3, B_UNIT_AREA, unit, false);
}
else {
numstr_len = BLI_snprintf_rlen(numstr, sizeof(numstr), conv_float, area);
}
DRW_text_cache_add(dt, vmid, numstr, numstr_len, 0, 0, txt_flag, col);
}
}
}
if (v3d->overlay.edit_flag & V3D_OVERLAY_EDIT_FACE_ANG) {
BMFace *efa;
const bool is_rad = (unit->system_rotation == USER_UNIT_ROT_RADIANS);
UI_GetThemeColor3ubv(TH_DRAWEXTRA_FACEANG, col);
BM_ITER_MESH (efa, &iter, em->bm, BM_FACES_OF_MESH) {
const bool is_face_sel = BM_elem_flag_test_bool(efa, BM_ELEM_SELECT);
if (is_face_sel || do_moving) {
BMIter liter;
BMLoop *loop;
bool is_first = true;
BM_ITER_ELEM (loop, &liter, efa, BM_LOOPS_OF_FACE) {
if (is_face_sel ||
(do_moving &&
(BM_elem_flag_test(loop->v, BM_ELEM_SELECT) ||
BM_elem_flag_test(loop->prev->v, BM_ELEM_SELECT) ||
BM_elem_flag_test(loop->next->v, BM_ELEM_SELECT))))
{
float v2_local[3];
/* lazy init center calc */
if (is_first) {
BM_face_calc_center_bounds(efa, vmid);
is_first = false;
}
copy_v3_v3(v1, loop->prev->v->co);
copy_v3_v3(v2, loop->v->co);
copy_v3_v3(v3, loop->next->v->co);
copy_v3_v3(v2_local, v2);
if (do_global) {
mul_mat3_m4_v3(ob->obmat, v1);
mul_mat3_m4_v3(ob->obmat, v2);
mul_mat3_m4_v3(ob->obmat, v3);
}
float angle = angle_v3v3v3(v1, v2, v3);
numstr_len = BLI_snprintf_rlen(
numstr, sizeof(numstr), "%.3f%s", (is_rad) ? angle : RAD2DEGF(angle),
(is_rad) ? "r" : "°");
interp_v3_v3v3(fvec, vmid, v2_local, 0.8f);
mul_m4_v3(ob->obmat, fvec);
DRW_text_cache_add(dt, fvec, numstr, numstr_len, 0, 0, txt_flag, col);
}
}
}
}
}
/* This option is for mesh ops and addons debugging; only available in UI if Blender starts with --debug */
if (v3d->overlay.edit_flag & V3D_OVERLAY_EDIT_INDICES) {
int i;
/* For now, reuse an appropriate theme color */
UI_GetThemeColor3ubv(TH_DRAWEXTRA_FACEANG, col);
if (em->selectmode & SCE_SELECT_VERTEX) {
BMVert *v;
BM_ITER_MESH_INDEX(v, &iter, em->bm, BM_VERTS_OF_MESH, i) {
if (BM_elem_flag_test(v, BM_ELEM_SELECT)) {
float vec[3];
mul_v3_m4v3(vec, ob->obmat, v->co);
numstr_len = BLI_snprintf_rlen(numstr, sizeof(numstr), "%d", i);
DRW_text_cache_add(dt, vec, numstr, numstr_len, 0, 0, txt_flag, col);
}
}
}
if (em->selectmode & SCE_SELECT_EDGE) {
BMEdge *e;
BM_ITER_MESH_INDEX(e, &iter, em->bm, BM_EDGES_OF_MESH, i) {
if (BM_elem_flag_test(e, BM_ELEM_SELECT)) {
float v1_clip[3], v2_clip[3];
copy_v3_v3(v1, e->v1->co);
copy_v3_v3(v2, e->v2->co);
if (clip_segment_v3_plane_n(v1, v2, clip_planes, 4, v1_clip, v2_clip)) {
mid_v3_v3v3(vmid, v1_clip, v2_clip);
mul_m4_v3(ob->obmat, vmid);
numstr_len = BLI_snprintf_rlen(numstr, sizeof(numstr), "%d", i);
DRW_text_cache_add(dt, vmid, numstr, numstr_len, 0, 0, txt_flag, col);
}
}
}
}
if (em->selectmode & SCE_SELECT_FACE) {
BMFace *f;
BM_ITER_MESH_INDEX(f, &iter, em->bm, BM_FACES_OF_MESH, i) {
if (BM_elem_flag_test(f, BM_ELEM_SELECT)) {
BM_face_calc_center_median(f, v1);
mul_m4_v3(ob->obmat, v1);
numstr_len = BLI_snprintf_rlen(numstr, sizeof(numstr), "%d", i);
DRW_text_cache_add(dt, v1, numstr, numstr_len, 0, 0, txt_flag, col);
}
}
}
}
}
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