Sergey Sharybin
50c475e534
Hopefully it makes it more clear, and also allows to introduce initialization from pre-created Subdiv descriptor.
107 lines
3.6 KiB
C
107 lines
3.6 KiB
C
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2020 Blender Foundation.
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* All rights reserved.
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*/
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/** \file
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* \ingroup bke
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*/
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#include "MEM_guardedalloc.h"
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#include "DNA_mesh_types.h"
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#include "DNA_meshdata_types.h"
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#include "DNA_modifier_types.h"
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#include "DNA_scene_types.h"
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#include "BKE_customdata.h"
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#include "BKE_lib_id.h"
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#include "BKE_mesh.h"
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#include "BKE_mesh_runtime.h"
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#include "BKE_modifier.h"
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#include "BKE_multires.h"
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#include "BKE_subdiv.h"
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#include "BKE_subsurf.h"
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#include "BLI_math_vector.h"
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#include "DEG_depsgraph_query.h"
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#include "multires_reshape.h"
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static void multires_subdivide_create_object_space_linear_grids(Mesh *mesh)
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{
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MDisps *mdisps = CustomData_get_layer(&mesh->ldata, CD_MDISPS);
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const int totpoly = mesh->totpoly;
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for (int p = 0; p < totpoly; p++) {
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MPoly *poly = &mesh->mpoly[p];
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float poly_center[3];
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BKE_mesh_calc_poly_center(poly, &mesh->mloop[poly->loopstart], mesh->mvert, poly_center);
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for (int l = 0; l < poly->totloop; l++) {
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const int loop_index = poly->loopstart + l;
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float(*disps)[3] = mdisps[loop_index].disps;
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mdisps[loop_index].totdisp = 4;
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mdisps[loop_index].level = 1;
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int prev_loop_index = l - 1 >= 0 ? loop_index - 1 : loop_index + poly->totloop - 1;
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int next_loop_index = l + 1 < poly->totloop ? loop_index + 1 : poly->loopstart;
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MLoop *loop = &mesh->mloop[loop_index];
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MLoop *loop_next = &mesh->mloop[next_loop_index];
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MLoop *loop_prev = &mesh->mloop[prev_loop_index];
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copy_v3_v3(disps[0], poly_center);
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mid_v3_v3v3(disps[1], mesh->mvert[loop->v].co, mesh->mvert[loop_next->v].co);
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mid_v3_v3v3(disps[2], mesh->mvert[loop->v].co, mesh->mvert[loop_prev->v].co);
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copy_v3_v3(disps[3], mesh->mvert[loop->v].co);
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}
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}
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}
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void multires_subdivide_create_tangent_displacement_linear_grids(Object *object,
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MultiresModifierData *mmd)
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{
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Mesh *coarse_mesh = object->data;
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multires_force_sculpt_rebuild(object);
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MultiresReshapeContext reshape_context;
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const int new_top_level = mmd->totlvl + 1;
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const bool has_mdisps = CustomData_has_layer(&coarse_mesh->ldata, CD_MDISPS);
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if (!has_mdisps) {
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CustomData_add_layer(&coarse_mesh->ldata, CD_MDISPS, CD_CALLOC, NULL, coarse_mesh->totloop);
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}
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if (new_top_level == 1) {
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/* No MDISPS. Create new grids for level 1 using the edges mid point and poly centers. */
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multires_reshape_ensure_grids(coarse_mesh, 1);
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multires_subdivide_create_object_space_linear_grids(coarse_mesh);
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}
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/* Convert the new grids to tangent displacement. */
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multires_set_tot_level(object, mmd, new_top_level);
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if (!multires_reshape_context_create_from_modifier(
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&reshape_context, object, mmd, new_top_level)) {
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return;
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}
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multires_reshape_object_grids_to_tangent_displacement(&reshape_context);
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multires_reshape_context_free(&reshape_context);
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}
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