97 lines
3.1 KiB
C++
97 lines
3.1 KiB
C++
/* SPDX-FileCopyrightText: 2020 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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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.hh"
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#include "BKE_lib_id.h"
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#include "BKE_mesh.hh"
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#include "BKE_mesh_runtime.hh"
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#include "BKE_modifier.hh"
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#include "BKE_multires.hh"
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#include "BKE_subdiv.hh"
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#include "BKE_subsurf.hh"
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#include "BLI_math_vector.h"
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#include "DEG_depsgraph_query.hh"
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#include "multires_reshape.hh"
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static void multires_subdivide_create_object_space_linear_grids(Mesh *mesh)
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{
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using namespace blender;
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using namespace blender::bke;
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const Span<float3> positions = mesh->vert_positions();
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const blender::OffsetIndices faces = mesh->faces();
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const blender::Span<int> corner_verts = mesh->corner_verts();
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MDisps *mdisps = static_cast<MDisps *>(
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CustomData_get_layer_for_write(&mesh->loop_data, CD_MDISPS, mesh->totloop));
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for (const int p : faces.index_range()) {
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const blender::IndexRange face = faces[p];
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const float3 face_center = mesh::face_center_calc(positions, corner_verts.slice(face));
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for (int l = 0; l < face.size(); l++) {
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const int loop_index = face[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 + face.size() - 1;
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int next_loop_index = l + 1 < face.size() ? loop_index + 1 : face.start();
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const int vert = corner_verts[loop_index];
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const int vert_next = corner_verts[next_loop_index];
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const int vert_prev = corner_verts[prev_loop_index];
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copy_v3_v3(disps[0], face_center);
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mid_v3_v3v3(disps[1], positions[vert], positions[vert_next]);
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mid_v3_v3v3(disps[2], positions[vert], positions[vert_prev]);
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copy_v3_v3(disps[3], positions[vert]);
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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 = static_cast<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->loop_data, CD_MDISPS);
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if (!has_mdisps) {
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CustomData_add_layer(&coarse_mesh->loop_data, CD_MDISPS, CD_SET_DEFAULT, 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 face 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(&reshape_context, object, mmd, new_top_level))
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{
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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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