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blender-archive/source/blender/blenkernel/intern/multires.c

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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2007 by Nicholas Bishop
* All rights reserved.
*/
/** \file
* \ingroup bke
*/
#include "MEM_guardedalloc.h"
/* for reading old multires */
#define DNA_DEPRECATED_ALLOW
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"
#include "BLI_bitmap.h"
#include "BLI_blenlib.h"
#include "BLI_math.h"
#include "BLI_task.h"
#include "BLI_utildefines.h"
#include "BKE_ccg.h"
#include "BKE_cdderivedmesh.h"
#include "BKE_editmesh.h"
#include "BKE_mesh.h"
#include "BKE_mesh_mapping.h"
#include "BKE_mesh_runtime.h"
#include "BKE_modifier.h"
#include "BKE_multires.h"
#include "BKE_paint.h"
#include "BKE_pbvh.h"
#include "BKE_scene.h"
#include "BKE_subdiv_ccg.h"
#include "BKE_subsurf.h"
#include "BKE_object.h"
#include "CCGSubSurf.h"
#include "DEG_depsgraph_query.h"
#include "multires_reshape.h"
#include <math.h>
#include <string.h>
/* MULTIRES MODIFIER */
static const int multires_max_levels = 13;
static const int multires_grid_tot[] = {
0, 4, 9, 25, 81, 289, 1089, 4225, 16641, 66049, 263169, 1050625, 4198401, 16785409};
static const int multires_side_tot[] = {
0, 2, 3, 5, 9, 17, 33, 65, 129, 257, 513, 1025, 2049, 4097};
/* See multiresModifier_disp_run for description of each operation */
typedef enum {
APPLY_DISPLACEMENTS,
CALC_DISPLACEMENTS,
ADD_DISPLACEMENTS,
} DispOp;
static void multiresModifier_disp_run(
DerivedMesh *dm, Mesh *me, DerivedMesh *dm2, DispOp op, CCGElem **oldGridData, int totlvl);
/** Customdata */
void multires_customdata_delete(Mesh *me)
{
if (me->edit_mesh) {
BMEditMesh *em = me->edit_mesh;
/* CustomData_external_remove is used here only to mark layer
* as non-external for further free-ing, so zero element count
* looks safer than em->totface */
CustomData_external_remove(&em->bm->ldata, &me->id, CD_MDISPS, 0);
if (CustomData_has_layer(&em->bm->ldata, CD_MDISPS)) {
BM_data_layer_free(em->bm, &em->bm->ldata, CD_MDISPS);
}
if (CustomData_has_layer(&em->bm->ldata, CD_GRID_PAINT_MASK)) {
BM_data_layer_free(em->bm, &em->bm->ldata, CD_GRID_PAINT_MASK);
}
}
else {
CustomData_external_remove(&me->ldata, &me->id, CD_MDISPS, me->totloop);
CustomData_free_layer_active(&me->ldata, CD_MDISPS, me->totloop);
CustomData_free_layer_active(&me->ldata, CD_GRID_PAINT_MASK, me->totloop);
}
}
/** Grid hiding */
static BLI_bitmap *multires_mdisps_upsample_hidden(BLI_bitmap *lo_hidden,
int lo_level,
int hi_level,
/* assumed to be at hi_level (or null) */
const BLI_bitmap *prev_hidden)
{
BLI_bitmap *subd;
int hi_gridsize = BKE_ccg_gridsize(hi_level);
int lo_gridsize = BKE_ccg_gridsize(lo_level);
int yh, xh, xl, yl, xo, yo, hi_ndx;
int offset, factor;
BLI_assert(lo_level <= hi_level);
/* fast case */
if (lo_level == hi_level) {
return MEM_dupallocN(lo_hidden);
}
subd = BLI_BITMAP_NEW(square_i(hi_gridsize), "MDisps.hidden upsample");
factor = BKE_ccg_factor(lo_level, hi_level);
offset = 1 << (hi_level - lo_level - 1);
/* low-res blocks */
for (yl = 0; yl < lo_gridsize; yl++) {
for (xl = 0; xl < lo_gridsize; xl++) {
int lo_val = BLI_BITMAP_TEST(lo_hidden, yl * lo_gridsize + xl);
/* high-res blocks */
for (yo = -offset; yo <= offset; yo++) {
yh = yl * factor + yo;
if (yh < 0 || yh >= hi_gridsize) {
continue;
}
for (xo = -offset; xo <= offset; xo++) {
xh = xl * factor + xo;
if (xh < 0 || xh >= hi_gridsize) {
continue;
}
hi_ndx = yh * hi_gridsize + xh;
if (prev_hidden) {
/* If prev_hidden is available, copy it to
* subd, except when the equivalent element in
* lo_hidden is different */
if (lo_val != prev_hidden[hi_ndx]) {
BLI_BITMAP_SET(subd, hi_ndx, lo_val);
}
else {
BLI_BITMAP_SET(subd, hi_ndx, prev_hidden[hi_ndx]);
}
}
else {
BLI_BITMAP_SET(subd, hi_ndx, lo_val);
}
}
}
}
}
return subd;
}
static BLI_bitmap *multires_mdisps_downsample_hidden(const BLI_bitmap *old_hidden,
int old_level,
int new_level)
{
BLI_bitmap *new_hidden;
int new_gridsize = BKE_ccg_gridsize(new_level);
int old_gridsize = BKE_ccg_gridsize(old_level);
int x, y, factor, old_value;
BLI_assert(new_level <= old_level);
factor = BKE_ccg_factor(new_level, old_level);
new_hidden = BLI_BITMAP_NEW(square_i(new_gridsize), "downsample hidden");
for (y = 0; y < new_gridsize; y++) {
for (x = 0; x < new_gridsize; x++) {
old_value = BLI_BITMAP_TEST(old_hidden, factor * y * old_gridsize + x * factor);
BLI_BITMAP_SET(new_hidden, y * new_gridsize + x, old_value);
}
}
return new_hidden;
}
static void multires_output_hidden_to_ccgdm(CCGDerivedMesh *ccgdm, Mesh *me, int level)
{
const MDisps *mdisps = CustomData_get_layer(&me->ldata, CD_MDISPS);
BLI_bitmap **grid_hidden = ccgdm->gridHidden;
int *gridOffset;
int i, j;
gridOffset = ccgdm->dm.getGridOffset(&ccgdm->dm);
for (i = 0; i < me->totpoly; i++) {
for (j = 0; j < me->mpoly[i].totloop; j++) {
int g = gridOffset[i] + j;
const MDisps *md = &mdisps[g];
BLI_bitmap *gh = md->hidden;
if (gh) {
grid_hidden[g] = multires_mdisps_downsample_hidden(gh, md->level, level);
}
}
}
}
/* subdivide mdisps.hidden if needed (assumes that md.level reflects
* the current level of md.hidden) */
static void multires_mdisps_subdivide_hidden(MDisps *md, int new_level)
{
BLI_bitmap *subd;
BLI_assert(md->hidden);
/* nothing to do if already subdivided enough */
if (md->level >= new_level) {
return;
}
subd = multires_mdisps_upsample_hidden(md->hidden, md->level, new_level, NULL);
/* swap in the subdivided data */
MEM_freeN(md->hidden);
md->hidden = subd;
}
static MDisps *multires_mdisps_init_hidden(Mesh *me, int level)
{
MDisps *mdisps = CustomData_add_layer(&me->ldata, CD_MDISPS, CD_CALLOC, NULL, me->totloop);
int gridsize = BKE_ccg_gridsize(level);
int gridarea = square_i(gridsize);
int i, j;
for (i = 0; i < me->totpoly; i++) {
bool hide = false;
for (j = 0; j < me->mpoly[i].totloop; j++) {
if (me->mvert[me->mloop[me->mpoly[i].loopstart + j].v].flag & ME_HIDE) {
hide = true;
break;
}
}
if (!hide) {
continue;
}
for (j = 0; j < me->mpoly[i].totloop; j++) {
MDisps *md = &mdisps[me->mpoly[i].loopstart + j];
BLI_assert(!md->hidden);
md->hidden = BLI_BITMAP_NEW(gridarea, "MDisps.hidden initialize");
BLI_bitmap_set_all(md->hidden, true, gridarea);
}
}
return mdisps;
}
Mesh *BKE_multires_create_mesh(struct Depsgraph *depsgraph,
Object *object,
MultiresModifierData *mmd)
{
Object *object_eval = DEG_get_evaluated_object(depsgraph, object);
Scene *scene_eval = DEG_get_evaluated_scene(depsgraph);
Mesh *deformed_mesh = mesh_get_eval_deform(
depsgraph, scene_eval, object_eval, &CD_MASK_BAREMESH);
ModifierEvalContext modifier_ctx = {
.depsgraph = depsgraph,
.object = object_eval,
.flag = MOD_APPLY_USECACHE | MOD_APPLY_IGNORE_SIMPLIFY,
};
const ModifierTypeInfo *mti = BKE_modifier_get_info(mmd->modifier.type);
Mesh *result = mti->modifyMesh(&mmd->modifier, &modifier_ctx, deformed_mesh);
if (result == deformed_mesh) {
result = BKE_mesh_copy_for_eval(deformed_mesh, true);
}
return result;
}
float (*BKE_multires_create_deformed_base_mesh_vert_coords(struct Depsgraph *depsgraph,
struct Object *object,
struct MultiresModifierData *mmd,
int *r_num_deformed_verts))[3]
{
Scene *scene_eval = DEG_get_evaluated_scene(depsgraph);
Object *object_eval = DEG_get_evaluated_object(depsgraph, object);
Object object_for_eval = *object_eval;
object_for_eval.data = object->data;
object_for_eval.sculpt = NULL;
const bool use_render = (DEG_get_mode(depsgraph) == DAG_EVAL_RENDER);
ModifierEvalContext mesh_eval_context = {depsgraph, &object_for_eval, 0};
if (use_render) {
mesh_eval_context.flag |= MOD_APPLY_RENDER;
}
const int required_mode = use_render ? eModifierMode_Render : eModifierMode_Realtime;
VirtualModifierData virtual_modifier_data;
ModifierData *first_md = BKE_modifiers_get_virtual_modifierlist(&object_for_eval,
&virtual_modifier_data);
Mesh *base_mesh = object->data;
int num_deformed_verts;
float(*deformed_verts)[3] = BKE_mesh_vert_coords_alloc(base_mesh, &num_deformed_verts);
for (ModifierData *md = first_md; md != NULL; md = md->next) {
const ModifierTypeInfo *mti = BKE_modifier_get_info(md->type);
if (md == &mmd->modifier) {
break;
}
if (!BKE_modifier_is_enabled(scene_eval, md, required_mode)) {
continue;
}
if (mti->type != eModifierTypeType_OnlyDeform) {
break;
}
BKE_modifier_deform_verts(
md, &mesh_eval_context, base_mesh, deformed_verts, num_deformed_verts);
}
if (r_num_deformed_verts != NULL) {
*r_num_deformed_verts = num_deformed_verts;
}
return deformed_verts;
}
MultiresModifierData *find_multires_modifier_before(Scene *scene, ModifierData *lastmd)
{
ModifierData *md;
for (md = lastmd; md; md = md->prev) {
if (md->type == eModifierType_Multires) {
if (BKE_modifier_is_enabled(scene, md, eModifierMode_Realtime)) {
return (MultiresModifierData *)md;
}
}
}
return NULL;
}
/* used for applying scale on mdisps layer and syncing subdivide levels when joining objects
* use_first - return first multires modifier if all multires'es are disabled
*/
MultiresModifierData *get_multires_modifier(Scene *scene, Object *ob, bool use_first)
{
ModifierData *md;
MultiresModifierData *mmd = NULL, *firstmmd = NULL;
/* find first active multires modifier */
for (md = ob->modifiers.first; md; md = md->next) {
if (md->type == eModifierType_Multires) {
if (!firstmmd) {
firstmmd = (MultiresModifierData *)md;
}
if (BKE_modifier_is_enabled(scene, md, eModifierMode_Realtime)) {
mmd = (MultiresModifierData *)md;
break;
}
}
}
if (!mmd && use_first) {
/* active multires have not been found
* try to use first one */
return firstmmd;
}
return mmd;
}
int multires_get_level(const Scene *scene,
const Object *ob,
const MultiresModifierData *mmd,
bool render,
bool ignore_simplify)
{
if (render) {
return (scene != NULL) ? get_render_subsurf_level(&scene->r, mmd->renderlvl, true) :
mmd->renderlvl;
}
if (ob->mode == OB_MODE_SCULPT) {
return mmd->sculptlvl;
}
if (ignore_simplify) {
return mmd->lvl;
}
return (scene != NULL) ? get_render_subsurf_level(&scene->r, mmd->lvl, false) : mmd->lvl;
}
void multires_set_tot_level(Object *ob, MultiresModifierData *mmd, int lvl)
{
mmd->totlvl = lvl;
if (ob->mode != OB_MODE_SCULPT) {
mmd->lvl = CLAMPIS(MAX2(mmd->lvl, lvl), 0, mmd->totlvl);
}
mmd->sculptlvl = CLAMPIS(MAX2(mmd->sculptlvl, lvl), 0, mmd->totlvl);
mmd->renderlvl = CLAMPIS(MAX2(mmd->renderlvl, lvl), 0, mmd->totlvl);
}
static void multires_ccg_mark_as_modified(SubdivCCG *subdiv_ccg, MultiresModifiedFlags flags)
{
if (flags & MULTIRES_COORDS_MODIFIED) {
subdiv_ccg->dirty.coords = true;
}
if (flags & MULTIRES_HIDDEN_MODIFIED) {
subdiv_ccg->dirty.hidden = true;
}
}
void multires_mark_as_modified(Depsgraph *depsgraph, Object *object, MultiresModifiedFlags flags)
{
if (object == NULL) {
return;
}
/* NOTE: CCG live inside of evaluated object.
*
* While this is a bit weird to tag the only one, this is how other areas were built
* historically: they are tagging multires for update and then rely on object re-evaluation to
* do an actual update.
*
* In a longer term maybe special dependency graph tag can help sanitizing this a bit. */
Object *object_eval = DEG_get_evaluated_object(depsgraph, object);
Mesh *mesh = object_eval->data;
SubdivCCG *subdiv_ccg = mesh->runtime.subdiv_ccg;
if (subdiv_ccg == NULL) {
return;
}
multires_ccg_mark_as_modified(subdiv_ccg, flags);
}
void multires_flush_sculpt_updates(Object *object)
{
if (object == NULL || object->sculpt == NULL || object->sculpt->pbvh == NULL) {
return;
}
SculptSession *sculpt_session = object->sculpt;
if (BKE_pbvh_type(sculpt_session->pbvh) != PBVH_GRIDS || !sculpt_session->multires.active ||
sculpt_session->multires.modifier == NULL) {
return;
}
SubdivCCG *subdiv_ccg = sculpt_session->subdiv_ccg;
if (subdiv_ccg == NULL) {
return;
}
if (!subdiv_ccg->dirty.coords && !subdiv_ccg->dirty.hidden) {
return;
}
Mesh *mesh = object->data;
multiresModifier_reshapeFromCCG(
sculpt_session->multires.modifier->totlvl, mesh, sculpt_session->subdiv_ccg);
subdiv_ccg->dirty.coords = false;
subdiv_ccg->dirty.hidden = false;
}
void multires_force_sculpt_rebuild(Object *object)
{
multires_flush_sculpt_updates(object);
if (object == NULL || object->sculpt == NULL) {
return;
}
SculptSession *ss = object->sculpt;
if (ss->pbvh != NULL) {
BKE_pbvh_free(ss->pbvh);
object->sculpt->pbvh = NULL;
}
if (ss->pmap != NULL) {
MEM_freeN(ss->pmap);
ss->pmap = NULL;
}
if (ss->pmap_mem != NULL) {
MEM_freeN(ss->pmap_mem);
ss->pmap_mem = NULL;
}
}
void multires_force_external_reload(Object *object)
{
Mesh *mesh = BKE_mesh_from_object(object);
CustomData_external_reload(&mesh->ldata, &mesh->id, CD_MASK_MDISPS, mesh->totloop);
multires_force_sculpt_rebuild(object);
}
/* reset the multires levels to match the number of mdisps */
static int get_levels_from_disps(Object *ob)
{
Mesh *me = ob->data;
MDisps *mdisp, *md;
int i, j, totlvl = 0;
mdisp = CustomData_get_layer(&me->ldata, CD_MDISPS);
for (i = 0; i < me->totpoly; i++) {
md = mdisp + me->mpoly[i].loopstart;
for (j = 0; j < me->mpoly[i].totloop; j++, md++) {
if (md->totdisp == 0) {
continue;
}
while (1) {
int side = (1 << (totlvl - 1)) + 1;
int lvl_totdisp = side * side;
if (md->totdisp == lvl_totdisp) {
break;
}
if (md->totdisp < lvl_totdisp) {
totlvl--;
}
else {
totlvl++;
}
}
break;
}
}
return totlvl;
}
/* reset the multires levels to match the number of mdisps */
void multiresModifier_set_levels_from_disps(MultiresModifierData *mmd, Object *ob)
{
Mesh *me = ob->data;
MDisps *mdisp;
if (me->edit_mesh) {
mdisp = CustomData_get_layer(&me->edit_mesh->bm->ldata, CD_MDISPS);
}
else {
mdisp = CustomData_get_layer(&me->ldata, CD_MDISPS);
}
if (mdisp) {
mmd->totlvl = get_levels_from_disps(ob);
mmd->lvl = MIN2(mmd->sculptlvl, mmd->totlvl);
mmd->sculptlvl = MIN2(mmd->sculptlvl, mmd->totlvl);
mmd->renderlvl = MIN2(mmd->renderlvl, mmd->totlvl);
}
}
static void multires_set_tot_mdisps(Mesh *me, int lvl)
{
MDisps *mdisps = CustomData_get_layer(&me->ldata, CD_MDISPS);
int i;
if (mdisps) {
for (i = 0; i < me->totloop; i++, mdisps++) {
mdisps->totdisp = multires_grid_tot[lvl];
mdisps->level = lvl;
}
}
}
static void multires_reallocate_mdisps(int totloop, MDisps *mdisps, int lvl)
{
int i;
/* reallocate displacements to be filled in */
for (i = 0; i < totloop; i++) {
int totdisp = multires_grid_tot[lvl];
float(*disps)[3] = MEM_calloc_arrayN(totdisp, sizeof(float[3]), "multires disps");
if (mdisps[i].disps) {
MEM_freeN(mdisps[i].disps);
}
if (mdisps[i].level && mdisps[i].hidden) {
multires_mdisps_subdivide_hidden(&mdisps[i], lvl);
}
mdisps[i].disps = disps;
mdisps[i].totdisp = totdisp;
mdisps[i].level = lvl;
}
}
static void multires_copy_grid(float (*gridA)[3], float (*gridB)[3], int sizeA, int sizeB)
{
int x, y, j, skip;
if (sizeA > sizeB) {
skip = (sizeA - 1) / (sizeB - 1);
for (j = 0, y = 0; y < sizeB; y++) {
for (x = 0; x < sizeB; x++, j++) {
copy_v3_v3(gridA[y * skip * sizeA + x * skip], gridB[j]);
}
}
}
else {
skip = (sizeB - 1) / (sizeA - 1);
for (j = 0, y = 0; y < sizeA; y++) {
for (x = 0; x < sizeA; x++, j++) {
copy_v3_v3(gridA[j], gridB[y * skip * sizeB + x * skip]);
}
}
}
}
static void multires_copy_dm_grid(CCGElem *gridA, CCGElem *gridB, CCGKey *keyA, CCGKey *keyB)
{
int x, y, j, skip;
if (keyA->grid_size > keyB->grid_size) {
skip = (keyA->grid_size - 1) / (keyB->grid_size - 1);
for (j = 0, y = 0; y < keyB->grid_size; y++) {
for (x = 0; x < keyB->grid_size; x++, j++) {
memcpy(CCG_elem_offset_co(keyA, gridA, y * skip * keyA->grid_size + x * skip),
CCG_elem_offset_co(keyB, gridB, j),
keyA->elem_size);
}
}
}
else {
skip = (keyB->grid_size - 1) / (keyA->grid_size - 1);
for (j = 0, y = 0; y < keyA->grid_size; y++) {
for (x = 0; x < keyA->grid_size; x++, j++) {
memcpy(CCG_elem_offset_co(keyA, gridA, j),
CCG_elem_offset_co(keyB, gridB, y * skip * keyB->grid_size + x * skip),
keyA->elem_size);
}
}
}
}
/* Reallocate gpm->data at a lower resolution and copy values over
* from the original high-resolution data */
static void multires_grid_paint_mask_downsample(GridPaintMask *gpm, int level)
{
if (level < gpm->level) {
int gridsize = BKE_ccg_gridsize(level);
float *data = MEM_calloc_arrayN(
square_i(gridsize), sizeof(float), "multires_grid_paint_mask_downsample");
int x, y;
for (y = 0; y < gridsize; y++) {
for (x = 0; x < gridsize; x++) {
data[y * gridsize + x] = paint_grid_paint_mask(gpm, level, x, y);
}
}
MEM_freeN(gpm->data);
gpm->data = data;
gpm->level = level;
}
}
static void multires_del_higher(MultiresModifierData *mmd, Object *ob, int lvl)
{
Mesh *me = (Mesh *)ob->data;
int levels = mmd->totlvl - lvl;
MDisps *mdisps;
GridPaintMask *gpm;
multires_set_tot_mdisps(me, mmd->totlvl);
multiresModifier_ensure_external_read(me, mmd);
mdisps = CustomData_get_layer(&me->ldata, CD_MDISPS);
gpm = CustomData_get_layer(&me->ldata, CD_GRID_PAINT_MASK);
multires_force_sculpt_rebuild(ob);
if (mdisps && levels > 0) {
if (lvl > 0) {
/* MLoop *ml = me->mloop; */ /*UNUSED*/
int nsize = multires_side_tot[lvl];
int hsize = multires_side_tot[mmd->totlvl];
int i, j;
for (i = 0; i < me->totpoly; i++) {
for (j = 0; j < me->mpoly[i].totloop; j++) {
int g = me->mpoly[i].loopstart + j;
MDisps *mdisp = &mdisps[g];
float(*disps)[3], (*ndisps)[3], (*hdisps)[3];
int totdisp = multires_grid_tot[lvl];
disps = MEM_calloc_arrayN(totdisp, sizeof(float[3]), "multires disps");
if (mdisp->disps != NULL) {
ndisps = disps;
hdisps = mdisp->disps;
multires_copy_grid(ndisps, hdisps, nsize, hsize);
if (mdisp->hidden) {
BLI_bitmap *gh = multires_mdisps_downsample_hidden(mdisp->hidden, mdisp->level, lvl);
MEM_freeN(mdisp->hidden);
mdisp->hidden = gh;
}
MEM_freeN(mdisp->disps);
}
mdisp->disps = disps;
mdisp->totdisp = totdisp;
mdisp->level = lvl;
if (gpm) {
multires_grid_paint_mask_downsample(&gpm[g], lvl);
}
}
}
}
else {
multires_customdata_delete(me);
}
}
multires_set_tot_level(ob, mmd, lvl);
}
/* (direction = 1) for delete higher, (direction = 0) for lower (not implemented yet) */
void multiresModifier_del_levels(MultiresModifierData *mmd,
Scene *scene,
Object *ob,
int direction)
{
Mesh *me = BKE_mesh_from_object(ob);
int lvl = multires_get_level(scene, ob, mmd, false, true);
int levels = mmd->totlvl - lvl;
MDisps *mdisps;
multires_set_tot_mdisps(me, mmd->totlvl);
multiresModifier_ensure_external_read(me, mmd);
mdisps = CustomData_get_layer(&me->ldata, CD_MDISPS);
multires_force_sculpt_rebuild(ob);
if (mdisps && levels > 0 && direction == 1) {
multires_del_higher(mmd, ob, lvl);
}
multires_set_tot_level(ob, mmd, lvl);
}
static DerivedMesh *multires_dm_create_local(Scene *scene,
Object *ob,
DerivedMesh *dm,
int lvl,
int totlvl,
int simple,
bool alloc_paint_mask,
int flags)
{
MultiresModifierData mmd = {{NULL}};
mmd.lvl = lvl;
mmd.sculptlvl = lvl;
mmd.renderlvl = lvl;
mmd.totlvl = totlvl;
mmd.simple = simple;
flags |= MULTIRES_USE_LOCAL_MMD;
if (alloc_paint_mask) {
flags |= MULTIRES_ALLOC_PAINT_MASK;
}
return multires_make_derived_from_derived(dm, &mmd, scene, ob, flags);
}
static DerivedMesh *subsurf_dm_create_local(Scene *scene,
Object *ob,
DerivedMesh *dm,
int lvl,
bool is_simple,
bool is_optimal,
bool is_plain_uv,
bool alloc_paint_mask,
bool for_render,
SubsurfFlags flags)
{
SubsurfModifierData smd = {{NULL}};
smd.levels = smd.renderLevels = lvl;
smd.quality = 3;
if (!is_plain_uv) {
smd.uv_smooth = SUBSURF_UV_SMOOTH_PRESERVE_CORNERS;
}
else {
smd.uv_smooth = SUBSURF_UV_SMOOTH_NONE;
}
if (is_simple) {
smd.subdivType = ME_SIMPLE_SUBSURF;
}
if (is_optimal) {
smd.flags |= eSubsurfModifierFlag_ControlEdges;
}
if (ob->mode & OB_MODE_EDIT) {
flags |= SUBSURF_IN_EDIT_MODE;
}
if (alloc_paint_mask) {
flags |= SUBSURF_ALLOC_PAINT_MASK;
}
if (for_render) {
flags |= SUBSURF_USE_RENDER_PARAMS;
}
return subsurf_make_derived_from_derived(dm, &smd, scene, NULL, flags);
}
static void multires_subdivide_legacy(
MultiresModifierData *mmd, Scene *scene, Object *ob, int totlvl, int updateblock, int simple)
{
Mesh *me = ob->data;
MDisps *mdisps;
const int lvl = mmd->totlvl;
if ((totlvl > multires_max_levels) || (me->totpoly == 0)) {
return;
}
BLI_assert(totlvl > lvl);
multires_force_sculpt_rebuild(ob);
mdisps = CustomData_get_layer(&me->ldata, CD_MDISPS);
if (!mdisps) {
mdisps = multires_mdisps_init_hidden(me, totlvl);
}
if (mdisps->disps && !updateblock && lvl != 0) {
/* upsample */
DerivedMesh *lowdm, *cddm, *highdm;
CCGElem **highGridData, **lowGridData, **subGridData;
CCGKey highGridKey, lowGridKey;
CCGSubSurf *ss;
int i, numGrids, highGridSize;
const bool has_mask = CustomData_has_layer(&me->ldata, CD_GRID_PAINT_MASK);
/* create subsurf DM from original mesh at high level */
cddm = CDDM_from_mesh(me);
DM_set_only_copy(cddm, &CD_MASK_BAREMESH);
highdm = subsurf_dm_create_local(NULL,
ob,
cddm,
totlvl,
simple,
0,
mmd->uv_smooth == SUBSURF_UV_SMOOTH_NONE,
has_mask,
false,
SUBSURF_IGNORE_SIMPLIFY);
ss = ((CCGDerivedMesh *)highdm)->ss;
/* create multires DM from original mesh at low level */
lowdm = multires_dm_create_local(
scene, ob, cddm, lvl, lvl, simple, has_mask, MULTIRES_IGNORE_SIMPLIFY);
BLI_assert(lowdm != cddm);
cddm->release(cddm);
/* copy subsurf grids and replace them with low displaced grids */
numGrids = highdm->getNumGrids(highdm);
highGridSize = highdm->getGridSize(highdm);
highGridData = highdm->getGridData(highdm);
highdm->getGridKey(highdm, &highGridKey);
lowGridData = lowdm->getGridData(lowdm);
lowdm->getGridKey(lowdm, &lowGridKey);
subGridData = MEM_calloc_arrayN(numGrids, sizeof(float *), "subGridData*");
for (i = 0; i < numGrids; i++) {
/* backup subsurf grids */
subGridData[i] = MEM_calloc_arrayN(
highGridKey.elem_size, highGridSize * highGridSize, "subGridData");
memcpy(subGridData[i], highGridData[i], highGridKey.elem_size * highGridSize * highGridSize);
/* overwrite with current displaced grids */
multires_copy_dm_grid(highGridData[i], lowGridData[i], &highGridKey, &lowGridKey);
}
/* low lower level dm no longer needed at this point */
lowdm->release(lowdm);
/* subsurf higher levels again with displaced data */
ccgSubSurf_updateFromFaces(ss, lvl, NULL, 0);
ccgSubSurf_updateLevels(ss, lvl, NULL, 0);
/* reallocate displacements */
multires_reallocate_mdisps(me->totloop, mdisps, totlvl);
/* compute displacements */
multiresModifier_disp_run(highdm, me, NULL, CALC_DISPLACEMENTS, subGridData, totlvl);
/* free */
highdm->release(highdm);
for (i = 0; i < numGrids; i++) {
MEM_freeN(subGridData[i]);
}
MEM_freeN(subGridData);
}
else {
/* only reallocate, nothing to upsample */
multires_reallocate_mdisps(me->totloop, mdisps, totlvl);
}
multires_set_tot_level(ob, mmd, totlvl);
}
void multiresModifier_subdivide_legacy(
MultiresModifierData *mmd, Scene *scene, Object *ob, int updateblock, int simple)
{
multires_subdivide_legacy(mmd, scene, ob, mmd->totlvl + 1, updateblock, simple);
}
static void grid_tangent(const CCGKey *key, int x, int y, int axis, CCGElem *grid, float t[3])
{
if (axis == 0) {
if (x == key->grid_size - 1) {
if (y == key->grid_size - 1) {
sub_v3_v3v3(
t, CCG_grid_elem_co(key, grid, x, y - 1), CCG_grid_elem_co(key, grid, x - 1, y - 1));
}
else {
sub_v3_v3v3(t, CCG_grid_elem_co(key, grid, x, y), CCG_grid_elem_co(key, grid, x - 1, y));
}
}
else {
sub_v3_v3v3(t, CCG_grid_elem_co(key, grid, x + 1, y), CCG_grid_elem_co(key, grid, x, y));
}
}
else if (axis == 1) {
if (y == key->grid_size - 1) {
if (x == key->grid_size - 1) {
sub_v3_v3v3(
t, CCG_grid_elem_co(key, grid, x - 1, y), CCG_grid_elem_co(key, grid, x - 1, (y - 1)));
}
else {
sub_v3_v3v3(t, CCG_grid_elem_co(key, grid, x, y), CCG_grid_elem_co(key, grid, x, (y - 1)));
}
}
else {
sub_v3_v3v3(t, CCG_grid_elem_co(key, grid, x, (y + 1)), CCG_grid_elem_co(key, grid, x, y));
}
}
}
/* Construct 3x3 tangent-space matrix in 'mat' */
static void grid_tangent_matrix(float mat[3][3], const CCGKey *key, int x, int y, CCGElem *grid)
{
grid_tangent(key, x, y, 0, grid, mat[0]);
normalize_v3(mat[0]);
grid_tangent(key, x, y, 1, grid, mat[1]);
normalize_v3(mat[1]);
copy_v3_v3(mat[2], CCG_grid_elem_no(key, grid, x, y));
}
typedef struct MultiresThreadedData {
DispOp op;
CCGElem **gridData, **subGridData;
CCGKey *key;
CCGKey *sub_key;
MPoly *mpoly;
MDisps *mdisps;
GridPaintMask *grid_paint_mask;
int *gridOffset;
int gridSize, dGridSize, dSkip;
float (*smat)[3];
} MultiresThreadedData;
static void multires_disp_run_cb(void *__restrict userdata,
const int pidx,
const TaskParallelTLS *__restrict UNUSED(tls))
{
MultiresThreadedData *tdata = userdata;
DispOp op = tdata->op;
CCGElem **gridData = tdata->gridData;
CCGElem **subGridData = tdata->subGridData;
CCGKey *key = tdata->key;
MPoly *mpoly = tdata->mpoly;
MDisps *mdisps = tdata->mdisps;
GridPaintMask *grid_paint_mask = tdata->grid_paint_mask;
int *gridOffset = tdata->gridOffset;
int gridSize = tdata->gridSize;
int dGridSize = tdata->dGridSize;
int dSkip = tdata->dSkip;
const int numVerts = mpoly[pidx].totloop;
int S, x, y, gIndex = gridOffset[pidx];
for (S = 0; S < numVerts; S++, gIndex++) {
GridPaintMask *gpm = grid_paint_mask ? &grid_paint_mask[gIndex] : NULL;
MDisps *mdisp = &mdisps[mpoly[pidx].loopstart + S];
CCGElem *grid = gridData[gIndex];
CCGElem *subgrid = subGridData[gIndex];
float(*dispgrid)[3] = NULL;
dispgrid = mdisp->disps;
/* if needed, reallocate multires paint mask */
if (gpm && gpm->level < key->level) {
gpm->level = key->level;
if (gpm->data) {
MEM_freeN(gpm->data);
}
gpm->data = MEM_calloc_arrayN(key->grid_area, sizeof(float), "gpm.data");
}
for (y = 0; y < gridSize; y++) {
for (x = 0; x < gridSize; x++) {
float *co = CCG_grid_elem_co(key, grid, x, y);
float *sco = CCG_grid_elem_co(key, subgrid, x, y);
float *data = dispgrid[dGridSize * y * dSkip + x * dSkip];
float mat[3][3], disp[3], d[3], mask;
/* construct tangent space matrix */
grid_tangent_matrix(mat, key, x, y, subgrid);
switch (op) {
case APPLY_DISPLACEMENTS:
/* Convert displacement to object space
* and add to grid points */
mul_v3_m3v3(disp, mat, data);
add_v3_v3v3(co, sco, disp);
break;
case CALC_DISPLACEMENTS:
/* Calculate displacement between new and old
* grid points and convert to tangent space */
sub_v3_v3v3(disp, co, sco);
invert_m3(mat);
mul_v3_m3v3(data, mat, disp);
break;
case ADD_DISPLACEMENTS:
/* Convert subdivided displacements to tangent
* space and add to the original displacements */
invert_m3(mat);
mul_v3_m3v3(d, mat, co);
add_v3_v3(data, d);
break;
}
if (gpm) {
switch (op) {
case APPLY_DISPLACEMENTS:
/* Copy mask from gpm to DM */
*CCG_grid_elem_mask(key, grid, x, y) = paint_grid_paint_mask(gpm, key->level, x, y);
break;
case CALC_DISPLACEMENTS:
/* Copy mask from DM to gpm */
mask = *CCG_grid_elem_mask(key, grid, x, y);
gpm->data[y * gridSize + x] = CLAMPIS(mask, 0, 1);
break;
case ADD_DISPLACEMENTS:
/* Add mask displacement to gpm */
gpm->data[y * gridSize + x] += *CCG_grid_elem_mask(key, grid, x, y);
break;
}
}
}
}
}
}
/* XXX WARNING: subsurf elements from dm and oldGridData *must* be of the same format (size),
* because this code uses CCGKey's info from dm to access oldGridData's normals
* (through the call to grid_tangent_matrix())! */
static void multiresModifier_disp_run(
DerivedMesh *dm, Mesh *me, DerivedMesh *dm2, DispOp op, CCGElem **oldGridData, int totlvl)
{
CCGDerivedMesh *ccgdm = (CCGDerivedMesh *)dm;
CCGElem **gridData, **subGridData;
CCGKey key;
MPoly *mpoly = me->mpoly;
MDisps *mdisps = CustomData_get_layer(&me->ldata, CD_MDISPS);
GridPaintMask *grid_paint_mask = NULL;
int *gridOffset;
int i, gridSize, dGridSize, dSkip;
int totloop, totpoly;
/* this happens in the dm made by bmesh_mdisps_space_set */
if (dm2 && CustomData_has_layer(&dm2->loopData, CD_MDISPS)) {
mpoly = CustomData_get_layer(&dm2->polyData, CD_MPOLY);
mdisps = CustomData_get_layer(&dm2->loopData, CD_MDISPS);
totloop = dm2->numLoopData;
totpoly = dm2->numPolyData;
}
else {
totloop = me->totloop;
totpoly = me->totpoly;
}
if (!mdisps) {
if (op == CALC_DISPLACEMENTS) {
mdisps = CustomData_add_layer(&me->ldata, CD_MDISPS, CD_DEFAULT, NULL, me->totloop);
}
else {
return;
}
}
/*numGrids = dm->getNumGrids(dm);*/ /*UNUSED*/
gridSize = dm->getGridSize(dm);
gridData = dm->getGridData(dm);
gridOffset = dm->getGridOffset(dm);
dm->getGridKey(dm, &key);
subGridData = (oldGridData) ? oldGridData : gridData;
dGridSize = multires_side_tot[totlvl];
dSkip = (dGridSize - 1) / (gridSize - 1);
/* multires paint masks */
if (key.has_mask) {
grid_paint_mask = CustomData_get_layer(&me->ldata, CD_GRID_PAINT_MASK);
}
/* when adding new faces in edit mode, need to allocate disps */
for (i = 0; i < totloop; i++) {
if (mdisps[i].disps == NULL) {
multires_reallocate_mdisps(totloop, mdisps, totlvl);
break;
}
}
TaskParallelSettings settings;
BLI_parallel_range_settings_defaults(&settings);
settings.min_iter_per_thread = CCG_TASK_LIMIT;
MultiresThreadedData data = {
.op = op,
.gridData = gridData,
.subGridData = subGridData,
.key = &key,
.mpoly = mpoly,
.mdisps = mdisps,
.grid_paint_mask = grid_paint_mask,
.gridOffset = gridOffset,
.gridSize = gridSize,
.dGridSize = dGridSize,
.dSkip = dSkip,
};
BLI_task_parallel_range(0, totpoly, &data, multires_disp_run_cb, &settings);
if (op == APPLY_DISPLACEMENTS) {
ccgSubSurf_stitchFaces(ccgdm->ss, 0, NULL, 0);
ccgSubSurf_updateNormals(ccgdm->ss, NULL, 0);
}
}
void multires_modifier_update_mdisps(struct DerivedMesh *dm, Scene *scene)
{
CCGDerivedMesh *ccgdm = (CCGDerivedMesh *)dm;
Object *ob;
Mesh *me;
MDisps *mdisps;
MultiresModifierData *mmd;
ob = ccgdm->multires.ob;
me = ccgdm->multires.ob->data;
mmd = ccgdm->multires.mmd;
multires_set_tot_mdisps(me, mmd->totlvl);
multiresModifier_ensure_external_read(me, mmd);
mdisps = CustomData_get_layer(&me->ldata, CD_MDISPS);
if (mdisps) {
int lvl = ccgdm->multires.lvl;
int totlvl = ccgdm->multires.totlvl;
if (lvl < totlvl) {
DerivedMesh *lowdm, *cddm, *highdm;
CCGElem **highGridData, **lowGridData, **subGridData, **gridData, *diffGrid;
CCGKey highGridKey, lowGridKey;
CCGSubSurf *ss;
int i, j, numGrids, highGridSize, lowGridSize;
const bool has_mask = CustomData_has_layer(&me->ldata, CD_GRID_PAINT_MASK);
/* Create subsurf DM from original mesh at high level. */
/* TODO: use mesh_deform_eval when sculpting on deformed mesh. */
cddm = CDDM_from_mesh(me);
DM_set_only_copy(cddm, &CD_MASK_BAREMESH);
highdm = subsurf_dm_create_local(scene,
ob,
cddm,
totlvl,
mmd->simple,
0,
mmd->uv_smooth == SUBSURF_UV_SMOOTH_NONE,
has_mask,
false,
SUBSURF_IGNORE_SIMPLIFY);
ss = ((CCGDerivedMesh *)highdm)->ss;
/* create multires DM from original mesh and displacements */
lowdm = multires_dm_create_local(
scene, ob, cddm, lvl, totlvl, mmd->simple, has_mask, MULTIRES_IGNORE_SIMPLIFY);
cddm->release(cddm);
/* gather grid data */
numGrids = highdm->getNumGrids(highdm);
highGridSize = highdm->getGridSize(highdm);
highGridData = highdm->getGridData(highdm);
highdm->getGridKey(highdm, &highGridKey);
lowGridSize = lowdm->getGridSize(lowdm);
lowGridData = lowdm->getGridData(lowdm);
lowdm->getGridKey(lowdm, &lowGridKey);
gridData = dm->getGridData(dm);
BLI_assert(highGridKey.elem_size == lowGridKey.elem_size);
subGridData = MEM_calloc_arrayN(numGrids, sizeof(CCGElem *), "subGridData*");
diffGrid = MEM_calloc_arrayN(lowGridKey.elem_size, lowGridSize * lowGridSize, "diff");
for (i = 0; i < numGrids; i++) {
/* backup subsurf grids */
subGridData[i] = MEM_calloc_arrayN(
highGridKey.elem_size, highGridSize * highGridSize, "subGridData");
memcpy(
subGridData[i], highGridData[i], highGridKey.elem_size * highGridSize * highGridSize);
/* write difference of subsurf and displaced low level into high subsurf */
for (j = 0; j < lowGridSize * lowGridSize; j++) {
sub_v4_v4v4(CCG_elem_offset_co(&lowGridKey, diffGrid, j),
CCG_elem_offset_co(&lowGridKey, gridData[i], j),
CCG_elem_offset_co(&lowGridKey, lowGridData[i], j));
}
multires_copy_dm_grid(highGridData[i], diffGrid, &highGridKey, &lowGridKey);
}
/* lower level dm no longer needed at this point */
MEM_freeN(diffGrid);
lowdm->release(lowdm);
/* subsurf higher levels again with difference of coordinates */
ccgSubSurf_updateFromFaces(ss, lvl, NULL, 0);
ccgSubSurf_updateLevels(ss, lvl, NULL, 0);
/* add to displacements */
multiresModifier_disp_run(highdm, me, NULL, ADD_DISPLACEMENTS, subGridData, mmd->totlvl);
/* free */
highdm->release(highdm);
for (i = 0; i < numGrids; i++) {
MEM_freeN(subGridData[i]);
}
MEM_freeN(subGridData);
}
else {
DerivedMesh *cddm, *subdm;
const bool has_mask = CustomData_has_layer(&me->ldata, CD_GRID_PAINT_MASK);
/* TODO: use mesh_deform_eval when sculpting on deformed mesh. */
cddm = CDDM_from_mesh(me);
DM_set_only_copy(cddm, &CD_MASK_BAREMESH);
subdm = subsurf_dm_create_local(scene,
ob,
cddm,
mmd->totlvl,
mmd->simple,
0,
mmd->uv_smooth == SUBSURF_UV_SMOOTH_NONE,
has_mask,
false,
SUBSURF_IGNORE_SIMPLIFY);
cddm->release(cddm);
multiresModifier_disp_run(
dm, me, NULL, CALC_DISPLACEMENTS, subdm->getGridData(subdm), mmd->totlvl);
subdm->release(subdm);
}
}
}
void multires_modifier_update_hidden(DerivedMesh *dm)
{
CCGDerivedMesh *ccgdm = (CCGDerivedMesh *)dm;
BLI_bitmap **grid_hidden = ccgdm->gridHidden;
Mesh *me = ccgdm->multires.ob->data;
MDisps *mdisps = CustomData_get_layer(&me->ldata, CD_MDISPS);
int totlvl = ccgdm->multires.totlvl;
int lvl = ccgdm->multires.lvl;
if (mdisps) {
int i;
for (i = 0; i < me->totloop; i++) {
MDisps *md = &mdisps[i];
BLI_bitmap *gh = grid_hidden[i];
if (!gh && md->hidden) {
MEM_freeN(md->hidden);
md->hidden = NULL;
}
else if (gh) {
gh = multires_mdisps_upsample_hidden(gh, lvl, totlvl, md->hidden);
if (md->hidden) {
MEM_freeN(md->hidden);
}
md->hidden = gh;
}
}
}
}
void multires_stitch_grids(Object *ob)
{
if (ob == NULL) {
return;
}
SculptSession *sculpt_session = ob->sculpt;
if (sculpt_session == NULL) {
return;
}
PBVH *pbvh = sculpt_session->pbvh;
SubdivCCG *subdiv_ccg = sculpt_session->subdiv_ccg;
if (pbvh == NULL || subdiv_ccg == NULL) {
return;
}
BLI_assert(BKE_pbvh_type(pbvh) == PBVH_GRIDS);
/* NOTE: Currently CCG does not keep track of faces, making it impossible
* to use BKE_pbvh_get_grid_updates().
*/
CCGFace **faces;
int num_faces;
BKE_pbvh_get_grid_updates(pbvh, false, (void ***)&faces, &num_faces);
if (num_faces) {
BKE_subdiv_ccg_average_stitch_faces(subdiv_ccg, faces, num_faces);
MEM_freeN(faces);
}
}
DerivedMesh *multires_make_derived_from_derived(
DerivedMesh *dm, MultiresModifierData *mmd, Scene *scene, Object *ob, MultiresFlags flags)
{
Mesh *me = ob->data;
DerivedMesh *result;
CCGDerivedMesh *ccgdm = NULL;
CCGElem **gridData, **subGridData;
CCGKey key;
const bool render = (flags & MULTIRES_USE_RENDER_PARAMS) != 0;
const bool ignore_simplify = (flags & MULTIRES_IGNORE_SIMPLIFY) != 0;
int lvl = multires_get_level(scene, ob, mmd, render, ignore_simplify);
int i, gridSize, numGrids;
if (lvl == 0) {
return dm;
}
const int subsurf_flags = ignore_simplify ? SUBSURF_IGNORE_SIMPLIFY : 0;
result = subsurf_dm_create_local(scene,
ob,
dm,
lvl,
mmd->simple,
mmd->flags & eMultiresModifierFlag_ControlEdges,
mmd->uv_smooth == SUBSURF_UV_SMOOTH_NONE,
flags & MULTIRES_ALLOC_PAINT_MASK,
render,
subsurf_flags);
if (!(flags & MULTIRES_USE_LOCAL_MMD)) {
ccgdm = (CCGDerivedMesh *)result;
ccgdm->multires.ob = ob;
ccgdm->multires.mmd = mmd;
ccgdm->multires.local_mmd = 0;
ccgdm->multires.lvl = lvl;
ccgdm->multires.totlvl = mmd->totlvl;
ccgdm->multires.modified_flags = 0;
}
numGrids = result->getNumGrids(result);
gridSize = result->getGridSize(result);
gridData = result->getGridData(result);
result->getGridKey(result, &key);
subGridData = MEM_malloc_arrayN(numGrids, sizeof(CCGElem *), "subGridData*");
for (i = 0; i < numGrids; i++) {
subGridData[i] = MEM_malloc_arrayN(key.elem_size, gridSize * gridSize, "subGridData");
memcpy(subGridData[i], gridData[i], key.elem_size * gridSize * gridSize);
}
multires_set_tot_mdisps(me, mmd->totlvl);
multiresModifier_ensure_external_read(me, mmd);
/*run displacement*/
multiresModifier_disp_run(result, ob->data, dm, APPLY_DISPLACEMENTS, subGridData, mmd->totlvl);
/* copy hidden elements for this level */
if (ccgdm) {
multires_output_hidden_to_ccgdm(ccgdm, me, lvl);
}
for (i = 0; i < numGrids; i++) {
MEM_freeN(subGridData[i]);
}
MEM_freeN(subGridData);
return result;
}
/* Adapted from sculptmode.c */
void old_mdisps_bilinear(float out[3], float (*disps)[3], const int st, float u, float v)
{
int x, y, x2, y2;
const int st_max = st - 1;
float urat, vrat, uopp;
float d[4][3], d2[2][3];
if (!disps || isnan(u) || isnan(v)) {
return;
}
if (u < 0) {
u = 0;
}
else if (u >= st) {
u = st_max;
}
if (v < 0) {
v = 0;
}
else if (v >= st) {
v = st_max;
}
x = floor(u);
y = floor(v);
x2 = x + 1;
y2 = y + 1;
if (x2 >= st) {
x2 = st_max;
}
if (y2 >= st) {
y2 = st_max;
}
urat = u - x;
vrat = v - y;
uopp = 1 - urat;
mul_v3_v3fl(d[0], disps[y * st + x], uopp);
mul_v3_v3fl(d[1], disps[y * st + x2], urat);
mul_v3_v3fl(d[2], disps[y2 * st + x], uopp);
mul_v3_v3fl(d[3], disps[y2 * st + x2], urat);
add_v3_v3v3(d2[0], d[0], d[1]);
add_v3_v3v3(d2[1], d[2], d[3]);
mul_v3_fl(d2[0], 1 - vrat);
mul_v3_fl(d2[1], vrat);
add_v3_v3v3(out, d2[0], d2[1]);
}
/* If 'ob_src' and 'ob_dst' both have multires modifiers, synchronize them
* such that 'ob_dst' has the same total number of levels as 'ob_src'. */
void multiresModifier_sync_levels_ex(Object *ob_dst,
MultiresModifierData *mmd_src,
MultiresModifierData *mmd_dst)
{
if (mmd_src->totlvl == mmd_dst->totlvl) {
return;
}
if (mmd_src->totlvl > mmd_dst->totlvl) {
if (mmd_dst->simple) {
multiresModifier_subdivide_to_level(
ob_dst, mmd_dst, mmd_src->totlvl, MULTIRES_SUBDIVIDE_SIMPLE);
}
else {
multiresModifier_subdivide_to_level(
ob_dst, mmd_dst, mmd_src->totlvl, MULTIRES_SUBDIVIDE_CATMULL_CLARK);
}
}
else {
multires_del_higher(mmd_dst, ob_dst, mmd_src->totlvl);
}
}
static void multires_sync_levels(Scene *scene, Object *ob_src, Object *ob_dst)
{
MultiresModifierData *mmd_src = get_multires_modifier(scene, ob_src, true);
MultiresModifierData *mmd_dst = get_multires_modifier(scene, ob_dst, true);
if (!mmd_src) {
/* object could have MDISP even when there is no multires modifier
* this could lead to troubles due to i've got no idea how mdisp could be
* up-sampled correct without modifier data.
* just remove mdisps if no multires present (nazgul) */
multires_customdata_delete(ob_src->data);
}
if (mmd_src && mmd_dst) {
multiresModifier_sync_levels_ex(ob_dst, mmd_src, mmd_dst);
}
}
static void multires_apply_uniform_scale(Object *object, const float scale)
{
Mesh *mesh = (Mesh *)object->data;
MDisps *mdisps = CustomData_get_layer(&mesh->ldata, CD_MDISPS);
for (int i = 0; i < mesh->totloop; i++) {
MDisps *grid = &mdisps[i];
for (int j = 0; j < grid->totdisp; j++) {
mul_v3_fl(grid->disps[j], scale);
}
}
}
static void multires_apply_smat(struct Depsgraph *UNUSED(depsgraph),
Scene *scene,
Object *object,
const float smat[3][3])
{
const MultiresModifierData *mmd = get_multires_modifier(scene, object, true);
if (mmd == NULL || mmd->totlvl == 0) {
return;
}
/* Make sure layer present. */
Mesh *mesh = (Mesh *)object->data;
multiresModifier_ensure_external_read(mesh, mmd);
if (!CustomData_get_layer(&mesh->ldata, CD_MDISPS)) {
return;
}
if (is_uniform_scaled_m3(smat)) {
const float scale = mat3_to_scale(smat);
multires_apply_uniform_scale(object, scale);
}
else {
/* TODO(sergey): This branch of code actually requires more work to
* preserve all the details.
*/
const float scale = mat3_to_scale(smat);
multires_apply_uniform_scale(object, scale);
}
}
int multires_mdisp_corners(MDisps *s)
{
int lvl = 13;
while (lvl > 0) {
int side = (1 << (lvl - 1)) + 1;
if ((s->totdisp % (side * side)) == 0) {
return s->totdisp / (side * side);
}
lvl--;
}
return 0;
}
void multiresModifier_scale_disp(struct Depsgraph *depsgraph, Scene *scene, Object *ob)
{
float smat[3][3];
/* object's scale matrix */
BKE_object_scale_to_mat3(ob, smat);
multires_apply_smat(depsgraph, scene, ob, smat);
}
void multiresModifier_prepare_join(struct Depsgraph *depsgraph,
Scene *scene,
Object *ob,
Object *to_ob)
{
float smat[3][3], tmat[3][3], mat[3][3];
multires_sync_levels(scene, to_ob, ob);
/* construct scale matrix for displacement */
BKE_object_scale_to_mat3(to_ob, tmat);
invert_m3(tmat);
BKE_object_scale_to_mat3(ob, smat);
mul_m3_m3m3(mat, smat, tmat);
multires_apply_smat(depsgraph, scene, ob, mat);
}
/* update multires data after topology changing */
void multires_topology_changed(Mesh *me)
{
MDisps *mdisp = NULL, *cur = NULL;
int i, grid = 0;
CustomData_external_read(&me->ldata, &me->id, CD_MASK_MDISPS, me->totloop);
mdisp = CustomData_get_layer(&me->ldata, CD_MDISPS);
if (!mdisp) {
return;
}
cur = mdisp;
for (i = 0; i < me->totloop; i++, cur++) {
if (cur->totdisp) {
grid = mdisp->totdisp;
break;
}
}
for (i = 0; i < me->totloop; i++, mdisp++) {
/* allocate memory for mdisp, the whole disp layer would be erased otherwise */
if (!mdisp->totdisp || !mdisp->disps) {
if (grid) {
mdisp->totdisp = grid;
mdisp->disps = MEM_calloc_arrayN(sizeof(float[3]), mdisp->totdisp, "mdisp topology");
}
continue;
}
}
}
/* Makes sure data from an external file is fully read.
*
* Since the multires data files only contain displacement vectors without knowledge about
* subdivision level some extra work is needed. Namely make is to all displacement grids have
* proper level and number of displacement vectors set. */
void multires_ensure_external_read(struct Mesh *mesh, int top_level)
{
if (!CustomData_external_test(&mesh->ldata, CD_MDISPS)) {
return;
}
MDisps *mdisps = CustomData_get_layer(&mesh->ldata, CD_MDISPS);
if (mdisps == NULL) {
mdisps = CustomData_add_layer(&mesh->ldata, CD_MDISPS, CD_DEFAULT, NULL, mesh->totloop);
}
const int totloop = mesh->totloop;
for (int i = 0; i < totloop; ++i) {
if (mdisps[i].level != top_level) {
MEM_SAFE_FREE(mdisps[i].disps);
}
/* NOTE: CustomData_external_read will take care of allocation of displacement vectors if
* they are missing. */
const int totdisp = multires_grid_tot[top_level];
mdisps[i].totdisp = totdisp;
mdisps[i].level = top_level;
}
CustomData_external_read(&mesh->ldata, &mesh->id, CD_MASK_MDISPS, mesh->totloop);
}
void multiresModifier_ensure_external_read(struct Mesh *mesh, const MultiresModifierData *mmd)
{
multires_ensure_external_read(mesh, mmd->totlvl);
}
/***************** Multires interpolation stuff *****************/
/* Find per-corner coordinate with given per-face UV coord */
int mdisp_rot_face_to_crn(struct MVert *UNUSED(mvert),
struct MPoly *mpoly,
struct MLoop *UNUSED(mloop),
const struct MLoopTri *UNUSED(lt),
const int face_side,
const float u,
const float v,
float *x,
float *y)
{
const float offset = face_side * 0.5f - 0.5f;
int S = 0;
if (mpoly->totloop == 4) {
if (u <= offset && v <= offset) {
S = 0;
}
else if (u > offset && v <= offset) {
S = 1;
}
else if (u > offset && v > offset) {
S = 2;
}
else if (u <= offset && v >= offset) {
S = 3;
}
if (S == 0) {
*y = offset - u;
*x = offset - v;
}
else if (S == 1) {
*x = u - offset;
*y = offset - v;
}
else if (S == 2) {
*y = u - offset;
*x = v - offset;
}
else if (S == 3) {
*x = offset - u;
*y = v - offset;
}
}
else if (mpoly->totloop == 3) {
int grid_size = offset;
float w = (face_side - 1) - u - v;
float W1, W2;
if (u >= v && u >= w) {
S = 0;
W1 = w;
W2 = v;
}
else if (v >= u && v >= w) {
S = 1;
W1 = u;
W2 = w;
}
else {
S = 2;
W1 = v;
W2 = u;
}
W1 /= (face_side - 1);
W2 /= (face_side - 1);
*x = (1 - (2 * W1) / (1 - W2)) * grid_size;
*y = (1 - (2 * W2) / (1 - W1)) * grid_size;
}
else {
/* the complicated ngon case: find the actual coordinate from
* the barycentric coordinates and finally find the closest vertex
* should work reliably for convex cases only but better than nothing */
#if 0
int minS, i;
float mindist = FLT_MAX;
for (i = 0; i < mpoly->totloop; i++) {
float len = len_v3v3(NULL, mvert[mloop[mpoly->loopstart + i].v].co);
if (len < mindist) {
mindist = len;
minS = i;
}
}
S = minS;
#endif
/* temp not implemented yet and also not working properly in current master.
* (was worked around by subdividing once) */
S = 0;
*x = 0;
*y = 0;
}
return S;
}
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