Blender  V3.3
multires_reshape_subdivide.c
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1 /* SPDX-License-Identifier: GPL-2.0-or-later
2  * Copyright 2020 Blender Foundation. All rights reserved. */
3 
8 #include "MEM_guardedalloc.h"
9 
10 #include "DNA_mesh_types.h"
11 #include "DNA_meshdata_types.h"
12 #include "DNA_modifier_types.h"
13 #include "DNA_scene_types.h"
14 
15 #include "BKE_customdata.h"
16 #include "BKE_lib_id.h"
17 #include "BKE_mesh.h"
18 #include "BKE_mesh_runtime.h"
19 #include "BKE_modifier.h"
20 #include "BKE_multires.h"
21 #include "BKE_subdiv.h"
22 #include "BKE_subsurf.h"
23 #include "BLI_math_vector.h"
24 
25 #include "DEG_depsgraph_query.h"
26 
27 #include "multires_reshape.h"
28 
30 {
32  const int totpoly = mesh->totpoly;
33  for (int p = 0; p < totpoly; p++) {
34  MPoly *poly = &mesh->mpoly[p];
35  float poly_center[3];
36  BKE_mesh_calc_poly_center(poly, &mesh->mloop[poly->loopstart], mesh->mvert, poly_center);
37  for (int l = 0; l < poly->totloop; l++) {
38  const int loop_index = poly->loopstart + l;
39 
40  float(*disps)[3] = mdisps[loop_index].disps;
41  mdisps[loop_index].totdisp = 4;
42  mdisps[loop_index].level = 1;
43 
44  int prev_loop_index = l - 1 >= 0 ? loop_index - 1 : loop_index + poly->totloop - 1;
45  int next_loop_index = l + 1 < poly->totloop ? loop_index + 1 : poly->loopstart;
46 
47  MLoop *loop = &mesh->mloop[loop_index];
48  MLoop *loop_next = &mesh->mloop[next_loop_index];
49  MLoop *loop_prev = &mesh->mloop[prev_loop_index];
50 
51  copy_v3_v3(disps[0], poly_center);
52  mid_v3_v3v3(disps[1], mesh->mvert[loop->v].co, mesh->mvert[loop_next->v].co);
53  mid_v3_v3v3(disps[2], mesh->mvert[loop->v].co, mesh->mvert[loop_prev->v].co);
54  copy_v3_v3(disps[3], mesh->mvert[loop->v].co);
55  }
56  }
57 }
58 
61 {
62  Mesh *coarse_mesh = object->data;
64 
65  MultiresReshapeContext reshape_context;
66 
67  const int new_top_level = mmd->totlvl + 1;
68 
69  const bool has_mdisps = CustomData_has_layer(&coarse_mesh->ldata, CD_MDISPS);
70  if (!has_mdisps) {
71  CustomData_add_layer(&coarse_mesh->ldata, CD_MDISPS, CD_CALLOC, NULL, coarse_mesh->totloop);
72  }
73 
74  if (new_top_level == 1) {
75  /* No MDISPS. Create new grids for level 1 using the edges mid point and poly centers. */
76  multires_reshape_ensure_grids(coarse_mesh, 1);
78  }
79 
80  /* Convert the new grids to tangent displacement. */
81  multires_set_tot_level(object, mmd, new_top_level);
82 
84  &reshape_context, object, mmd, new_top_level)) {
85  return;
86  }
87 
89  multires_reshape_context_free(&reshape_context);
90 }
typedef float(TangentPoint)[2]
CustomData interface, see also DNA_customdata_types.h.
@ CD_CALLOC
bool CustomData_has_layer(const struct CustomData *data, int type)
void * CustomData_get_layer(const struct CustomData *data, int type)
void * CustomData_add_layer(struct CustomData *data, int type, eCDAllocType alloctype, void *layer, int totelem)
Definition: customdata.cc:2776
void BKE_mesh_calc_poly_center(const struct MPoly *mpoly, const struct MLoop *loopstart, const struct MVert *mvarray, float r_cent[3])
void multires_set_tot_level(struct Object *ob, struct MultiresModifierData *mmd, int lvl)
Definition: multires.c:365
void multires_force_sculpt_rebuild(struct Object *object)
Definition: multires.c:437
MINLINE void copy_v3_v3(float r[3], const float a[3])
void mid_v3_v3v3(float r[3], const float a[3], const float b[3])
Definition: math_vector.c:237
Read Guarded memory(de)allocation.
ATTR_WARN_UNUSED_RESULT const BMLoop * l
void multires_reshape_context_free(MultiresReshapeContext *reshape_context)
void multires_reshape_ensure_grids(struct Mesh *mesh, int level)
bool multires_reshape_context_create_from_modifier(MultiresReshapeContext *reshape_context, struct Object *object, struct MultiresModifierData *mmd, int top_level)
void multires_reshape_object_grids_to_tangent_displacement(const MultiresReshapeContext *reshape_context)
static void multires_subdivide_create_object_space_linear_grids(Mesh *mesh)
void multires_subdivide_create_tangent_displacement_linear_grids(Object *object, MultiresModifierData *mmd)
float(* disps)[3]
unsigned int v
float co[3]
struct MVert * mvert
struct MLoop * mloop
int totpoly
int totloop
struct MPoly * mpoly
CustomData ldata