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/* SPDX-License-Identifier: GPL-2.0-or-later */
/** \file
* \ingroup bmesh
*
* Pokes a face.
*
* Splits a face into a triangle fan.
*/
#include "BLI_math.h"
#include "bmesh.h"
#include "intern/bmesh_operators_private.h" /* own include */
#include "BKE_customdata.h"
#define ELE_NEW 1
/**
* Pokes a face
*
* Splits a face into a triangle fan.
* Iterate over all selected faces, create a new center vertex and
* create triangles between original face edges and new center vertex.
*/
void bmo_poke_exec(BMesh *bm, BMOperator *op)
{
const int cd_loop_mdisp_offset = CustomData_get_offset(&bm->ldata, CD_MDISPS);
BMOIter oiter;
BMFace *f;
const float offset = BMO_slot_float_get(op->slots_in, "offset");
const bool use_relative_offset = BMO_slot_bool_get(op->slots_in, "use_relative_offset");
const int center_mode = BMO_slot_int_get(op->slots_in, "center_mode");
void (*bm_face_calc_center_fn)(const BMFace *f, float r_cent[3]);
switch (center_mode) {
case BMOP_POKE_MEDIAN_WEIGHTED:
bm_face_calc_center_fn = BM_face_calc_center_median_weighted;
break;
case BMOP_POKE_BOUNDS:
bm_face_calc_center_fn = BM_face_calc_center_bounds;
break;
case BMOP_POKE_MEDIAN:
bm_face_calc_center_fn = BM_face_calc_center_median;
break;
default:
BLI_assert(0);
return;
}
BMO_ITER (f, &oiter, op->slots_in, "faces", BM_FACE) {
BMFace *f_new;
float f_center[3], f_center_mean[3];
BMVert *v_center = NULL;
BMLoop *l_iter, *l_first;
/* only interpolate the central loop from the face once,
* then copy to all others in the fan */
BMLoop *l_center_example;
/* 1.0 or the average length from the center to the face verts */
float offset_fac;
int i;
bm_face_calc_center_fn(f, f_center);
v_center = BM_vert_create(bm, f_center, NULL, BM_CREATE_NOP);
BMO_vert_flag_enable(bm, v_center, ELE_NEW);
if (cd_loop_mdisp_offset != -1) {
if (center_mode == BMOP_POKE_MEDIAN) {
copy_v3_v3(f_center_mean, f_center);
}
else {
BM_face_calc_center_median(f, f_center_mean);
}
}
/* handled by BM_loop_interp_from_face */
// BM_vert_interp_from_face(bm, v_center, f);
if (use_relative_offset) {
offset_fac = 0.0f;
}
else {
offset_fac = 1.0f;
}
i = 0;
l_iter = l_first = BM_FACE_FIRST_LOOP(f);
do {
BMLoop *l_new;
f_new = BM_face_create_quad_tri(
bm, l_iter->v, l_iter->next->v, v_center, NULL, f, BM_CREATE_NOP);
l_new = BM_FACE_FIRST_LOOP(f_new);
if (i == 0) {
l_center_example = l_new->prev;
BM_loop_interp_from_face(bm, l_center_example, f, true, false);
}
else {
BM_elem_attrs_copy(bm, bm, l_center_example, l_new->prev);
}
/* Copy Loop Data */
BM_elem_attrs_copy(bm, bm, l_iter, l_new);
BM_elem_attrs_copy(bm, bm, l_iter->next, l_new->next);
BMO_face_flag_enable(bm, f_new, ELE_NEW);
if (cd_loop_mdisp_offset != -1) {
float f_new_center[3];
BM_face_calc_center_median(f_new, f_new_center);
BM_face_interp_multires_ex(bm, f_new, f, f_new_center, f_center, cd_loop_mdisp_offset);
}
if (use_relative_offset) {
offset_fac += len_v3v3(f_center, l_iter->v->co);
}
} while ((void)i++, (l_iter = l_iter->next) != l_first);
if (use_relative_offset) {
offset_fac /= (float)f->len;
}
/* else remain at 1.0 */
copy_v3_v3(v_center->no, f->no);
madd_v3_v3fl(v_center->co, v_center->no, offset * offset_fac);
/* Kill Face */
BM_face_kill(bm, f);
}
BMO_slot_buffer_from_enabled_flag(bm, op, op->slots_out, "verts.out", BM_VERT, ELE_NEW);
BMO_slot_buffer_from_enabled_flag(bm, op, op->slots_out, "faces.out", BM_FACE, ELE_NEW);
}
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