BMesh: add decimate edit-mode tool
Support applying decimate to the mesh selection.
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Notes:
blender-bot
2023-02-14 11:29:52 +01:00
Referenced by issue #48813, Custom icon is not drawn on header / addons prefs panel
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@ -2592,6 +2592,7 @@ class VIEW3D_MT_edit_mesh_clean(Menu):
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layout.separator()
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layout.operator("mesh.decimate")
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layout.operator("mesh.dissolve_degenerate")
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layout.operator("mesh.dissolve_limited")
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layout.operator("mesh.face_make_planar")
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@ -49,6 +49,7 @@
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#include "BKE_material.h"
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#include "BKE_context.h"
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#include "BKE_deform.h"
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#include "BKE_depsgraph.h"
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#include "BKE_report.h"
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#include "BKE_texture.h"
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@ -79,6 +80,8 @@
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#include "mesh_intern.h" /* own include */
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#include "bmesh_tools.h"
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#define USE_FACE_CREATE_SEL_EXTEND
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static int edbm_subdivide_exec(bContext *C, wmOperator *op)
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@ -3979,6 +3982,196 @@ void MESH_OT_tris_convert_to_quads(wmOperatorType *ot)
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join_triangle_props(ot);
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}
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/* -------------------------------------------------------------------- */
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/** \name Decimate
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*
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* \note The function to decimate is intended for use as a modifier,
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* while its handy allow access as a tool - this does cause access to be a little awkward
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* (passing selection as weights for eg).
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*
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* \{ */
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static int edbm_decimate_exec(bContext *C, wmOperator *op)
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{
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Object *obedit = CTX_data_edit_object(C);
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BMEditMesh *em = BKE_editmesh_from_object(obedit);
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BMesh *bm = em->bm;
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const float ratio = RNA_float_get(op->ptr, "ratio");
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bool use_vertex_group = RNA_boolean_get(op->ptr, "use_vertex_group");
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const float vertex_group_factor = RNA_float_get(op->ptr, "vertex_group_factor");
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const bool invert_vertex_group = RNA_boolean_get(op->ptr, "invert_vertex_group");
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const bool use_symmetry = RNA_boolean_get(op->ptr, "use_symmetry");
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const float symmetry_eps = 0.00002f;
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const int symmetry_axis = use_symmetry ? RNA_enum_get(op->ptr, "symmetry_axis") : -1;
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/* nop */
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if (ratio == 1.0f) {
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return OPERATOR_FINISHED;
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}
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float *vweights = MEM_mallocN(sizeof(*vweights) * bm->totvert, __func__);
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{
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const int cd_dvert_offset = CustomData_get_offset(&bm->vdata, CD_MDEFORMVERT);
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const int defbase_act = obedit->actdef - 1;
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if (use_vertex_group && (cd_dvert_offset == -1)) {
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BKE_report(op->reports, RPT_WARNING, "No active vertex group");
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use_vertex_group = false;
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}
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BMIter iter;
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BMVert *v;
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int i;
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BM_ITER_MESH_INDEX (v, &iter, bm, BM_VERTS_OF_MESH, i) {
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float weight = 0.0f;
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if (BM_elem_flag_test(v, BM_ELEM_SELECT)) {
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if (use_vertex_group) {
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const MDeformVert *dv = BM_ELEM_CD_GET_VOID_P(v, cd_dvert_offset);
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weight = defvert_find_weight(dv, defbase_act);
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if (invert_vertex_group) {
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weight = 1.0 - weight;
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}
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}
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else {
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weight = 1.0f;
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}
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}
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vweights[i] = weight;
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BM_elem_index_set(v, i); /* set_inline */
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}
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bm->elem_index_dirty &= ~BM_VERT;
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}
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float ratio_adjust;
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if ((bm->totface == bm->totfacesel) || (ratio == 0.0f)) {
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ratio_adjust = ratio;
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}
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else {
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/**
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* Calculate a new ratio based on faces that could be remoevd during decimation.
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* needed so 0..1 has a meaningful range when operating on the selection.
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*
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* This doesn't have to be totally accurate,
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* but needs to be greater than the number of selected faces
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*/
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int totface_basis = 0;
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int totface_adjacent = 0;
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BMIter iter;
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BMFace *f;
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BM_ITER_MESH (f, &iter, bm, BM_FACES_OF_MESH) {
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/* count faces during decimation, ngons are triangulated */
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const int f_len = f->len > 4 ? (f->len - 2) : 1;
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totface_basis += f_len;
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BMLoop *l_iter, *l_first;
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l_iter = l_first = BM_FACE_FIRST_LOOP(f);
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do {
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if (vweights[BM_elem_index_get(l_iter->v)] != 0.0f) {
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totface_adjacent += f_len;
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break;
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}
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} while ((l_iter = l_iter->next) != l_first);
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}
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ratio_adjust = ratio;
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ratio_adjust = 1.0f - ratio_adjust;
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ratio_adjust *= (float)totface_adjacent / (float)totface_basis;
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ratio_adjust = 1.0f - ratio_adjust;
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}
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BM_mesh_decimate_collapse(
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em->bm, ratio_adjust, vweights, vertex_group_factor, false,
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symmetry_axis, symmetry_eps);
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MEM_freeN(vweights);
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{
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short selectmode = em->selectmode;
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if ((selectmode & (SCE_SELECT_VERTEX | SCE_SELECT_EDGE)) == 0) {
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/* ensure we flush edges -> faces */
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selectmode |= SCE_SELECT_EDGE;
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}
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EDBM_selectmode_flush_ex(em, selectmode);
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}
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EDBM_update_generic(em, true, true);
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return OPERATOR_FINISHED;
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}
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static bool edbm_decimate_check(bContext *UNUSED(C), wmOperator *UNUSED(op))
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{
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return true;
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}
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static void edbm_decimate_ui(bContext *UNUSED(C), wmOperator *op)
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{
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uiLayout *layout = op->layout, *box, *row, *col;
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PointerRNA ptr;
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RNA_pointer_create(NULL, op->type->srna, op->properties, &ptr);
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uiItemR(layout, &ptr, "ratio", 0, NULL, ICON_NONE);
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box = uiLayoutBox(layout);
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uiItemR(box, &ptr, "use_vertex_group", 0, NULL, ICON_NONE);
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col = uiLayoutColumn(box, false);
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uiLayoutSetActive(col, RNA_boolean_get(&ptr, "use_vertex_group"));
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uiItemR(col, &ptr, "vertex_group_factor", 0, NULL, ICON_NONE);
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uiItemR(col, &ptr, "invert_vertex_group", 0, NULL, ICON_NONE);
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box = uiLayoutBox(layout);
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uiItemR(box, &ptr, "use_symmetry", 0, NULL, ICON_NONE);
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row = uiLayoutRow(box, true);
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uiLayoutSetActive(row, RNA_boolean_get(&ptr, "use_symmetry"));
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uiItemR(row, &ptr, "symmetry_axis", UI_ITEM_R_EXPAND, NULL, ICON_NONE);
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}
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void MESH_OT_decimate(wmOperatorType *ot)
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{
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/* identifiers */
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ot->name = "Decimate Geometry";
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ot->idname = "MESH_OT_decimate";
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ot->description = "Simplify geometry by collapsing edges";
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/* api callbacks */
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ot->exec = edbm_decimate_exec;
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ot->check = edbm_decimate_check;
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ot->ui = edbm_decimate_ui;
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ot->poll = ED_operator_editmesh;
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/* flags */
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ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
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/* Note, keep in sync with 'rna_def_modifier_decimate' */
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RNA_def_float(ot->srna, "ratio", 1.0f, 0.0f, 1.0f, "Ratio", "", 0.0f, 1.0f);
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RNA_def_boolean(ot->srna, "use_vertex_group", false, "Vertex Group",
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"Use active vertex group as an influence");
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RNA_def_float(ot->srna, "vertex_group_factor", 1.0f, 0.0f, 1000.0f, "Weight",
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"Vertex group strength", 0.0f, 10.0f);
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RNA_def_boolean(ot->srna, "invert_vertex_group", false, "Invert",
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"Invert vertex group influence");
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RNA_def_boolean(ot->srna, "use_symmetry", false, "Symmetry",
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"Maintain symmetry on an axis");
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RNA_def_enum(ot->srna, "symmetry_axis", rna_enum_axis_xyz_items, 1, "Axis", "Axis of symmetry");
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}
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/** \} */
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/* -------------------------------------------------------------------- */
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/* Dissolve */
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@ -216,6 +216,7 @@ void MESH_OT_fill_holes(struct wmOperatorType *ot);
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void MESH_OT_beautify_fill(struct wmOperatorType *ot);
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void MESH_OT_quads_convert_to_tris(struct wmOperatorType *ot);
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void MESH_OT_tris_convert_to_quads(struct wmOperatorType *ot);
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void MESH_OT_decimate(struct wmOperatorType *ot);
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void MESH_OT_dissolve_verts(struct wmOperatorType *ot);
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void MESH_OT_dissolve_edges(struct wmOperatorType *ot);
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void MESH_OT_dissolve_faces(struct wmOperatorType *ot);
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@ -106,6 +106,7 @@ void ED_operatortypes_mesh(void)
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WM_operatortype_append(MESH_OT_beautify_fill);
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WM_operatortype_append(MESH_OT_quads_convert_to_tris);
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WM_operatortype_append(MESH_OT_tris_convert_to_quads);
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WM_operatortype_append(MESH_OT_decimate);
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WM_operatortype_append(MESH_OT_dissolve_verts);
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WM_operatortype_append(MESH_OT_dissolve_edges);
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WM_operatortype_append(MESH_OT_dissolve_faces);
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@ -1514,6 +1514,8 @@ static void rna_def_modifier_decimate(BlenderRNA *brna)
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{0, NULL, 0, NULL, NULL}
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};
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/* Note, keep in sync with operator 'MESH_OT_decimate' */
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StructRNA *srna;
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PropertyRNA *prop;
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