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test/source/blender/blenkernel/intern/multires_reshape.c
Sergey Sharybin a0e82342d7 Multires: Cleanup, naming 
First of all, follow our naming convention to use module prefix.

Second of all, mesh is being created and is to be freed, we also
have convention for such function names.
2018-11-02 13:59:04 +01:00

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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* 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) 2018 Blender Foundation.
* All rights reserved.
*
* Contributor(s): Sergey Sharybin.
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/blenkernel/intern/multires_reshape.c
* \ingroup bke
*/
#include "MEM_guardedalloc.h"
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_scene_types.h"
#include "BLI_utildefines.h"
#include "BLI_math_vector.h"
#include "BLI_task.h"
#include "BKE_ccg.h"
#include "BKE_library.h"
#include "BKE_mesh.h"
#include "BKE_mesh_runtime.h"
#include "BKE_modifier.h"
#include "BKE_multires.h"
#include "BKE_subdiv.h"
#include "BKE_subdiv_ccg.h"
#include "BKE_subdiv_eval.h"
#include "BKE_subdiv_foreach.h"
#include "BKE_subdiv_mesh.h"
#include "DEG_depsgraph_query.h"
static void multires_reshape_init_mmd(
MultiresModifierData *reshape_mmd,
const MultiresModifierData *mmd)
{
*reshape_mmd = *mmd;
}
static void multires_reshape_init_mmd_top_level(
MultiresModifierData *reshape_mmd,
const MultiresModifierData *mmd)
{
*reshape_mmd = *mmd;
reshape_mmd->lvl = reshape_mmd->totlvl;
}
/* =============================================================================
* General reshape implementation, reused by all particular cases.
*/
typedef struct MultiresReshapeContext {
Subdiv *subdiv;
const Mesh *coarse_mesh;
MDisps *mdisps;
GridPaintMask *grid_paint_mask;
int top_grid_size;
int top_level;
} MultiresReshapeContext;
static void multires_reshape_allocate_displacement_grid(
MDisps *displacement_grid, const int level)
{
const int grid_size = BKE_subdiv_grid_size_from_level(level);
const int grid_area = grid_size * grid_size;
float (*disps)[3] = MEM_calloc_arrayN(
grid_area, 3 * sizeof(float), "multires disps");
displacement_grid->disps = disps;
displacement_grid->totdisp = grid_area;
displacement_grid->level = level;
}
static void multires_reshape_ensure_displacement_grid(
MDisps *displacement_grid, const int level)
{
if (displacement_grid->disps != NULL) {
return;
}
multires_reshape_allocate_displacement_grid(
displacement_grid, level);
}
static void multires_reshape_ensure_displacement_grids(
Mesh *mesh,
const int grid_level)
{
const int num_grids = mesh->totloop;
MDisps *mdisps = CustomData_get_layer(&mesh->ldata, CD_MDISPS);
for (int grid_index = 0; grid_index < num_grids; grid_index++) {
multires_reshape_ensure_displacement_grid(
&mdisps[grid_index], grid_level);
}
}
static void multires_reshape_ensure_mask_grids(Mesh *mesh, const int grid_level)
{
GridPaintMask *grid_paint_masks =
CustomData_get_layer(&mesh->ldata, CD_GRID_PAINT_MASK);
if (grid_paint_masks == NULL) {
return;
}
const int num_grids = mesh->totloop;
const int grid_size = BKE_subdiv_grid_size_from_level(grid_level);
const int grid_area = grid_size * grid_size;
for (int grid_index = 0; grid_index < num_grids; grid_index++) {
GridPaintMask *grid_paint_mask = &grid_paint_masks[grid_index];
if (grid_paint_mask->level == grid_level) {
continue;
}
grid_paint_mask->level = grid_level;
if (grid_paint_mask->data) {
MEM_freeN(grid_paint_mask->data);
}
grid_paint_mask->data = MEM_calloc_arrayN(
grid_area, sizeof(float), "gpm.data");
}
}
static void multires_reshape_ensure_grids(Mesh *mesh, const int grid_level)
{
multires_reshape_ensure_displacement_grids(mesh, grid_level);
multires_reshape_ensure_mask_grids(mesh, grid_level);
}
static void multires_reshape_vertex_copy_to_next(
MultiresReshapeContext *ctx,
const MPoly *coarse_poly,
const int current_corner,
const MDisps *current_displacement_grid,
const GridPaintMask *current_mask_grid,
const int current_grid_x, const int current_grid_y)
{
const int grid_size = ctx->top_grid_size;
const int next_current_corner = (current_corner + 1) % coarse_poly->totloop;
const int next_grid_x = 0;
const int next_grid_y = current_grid_x;
const int current_index = current_grid_y * grid_size + current_grid_x;
const int next_index = next_grid_y * grid_size + next_grid_x;
/* Copy displacement. */
MDisps *next_displacement_grid = &ctx->mdisps[
coarse_poly->loopstart + next_current_corner];
float *next_displacement = next_displacement_grid->disps[next_index];
copy_v3_v3(next_displacement,
current_displacement_grid->disps[current_index]);
SWAP(float, next_displacement[0], next_displacement[1]);
next_displacement[0] = -next_displacement[0];
/* Copy mask, if exists. */
if (current_mask_grid != NULL) {
GridPaintMask *next_mask_grid = &ctx->grid_paint_mask[
coarse_poly->loopstart + next_current_corner];
next_mask_grid->data[next_index] =
current_mask_grid->data[current_index];
}
}
static void multires_reshape_vertex_copy_to_prev(
MultiresReshapeContext *ctx,
const MPoly *coarse_poly,
const int current_corner,
const MDisps *current_displacement_grid,
const GridPaintMask *current_mask_grid,
const int current_grid_x, const int current_grid_y)
{
const int grid_size = ctx->top_grid_size;
const int prev_current_corner =
(current_corner - 1 + coarse_poly->totloop) % coarse_poly->totloop;
const int prev_grid_x = current_grid_y;
const int prev_grid_y = 0;
const int current_index = current_grid_y * grid_size + current_grid_x;
const int prev_index = prev_grid_y * grid_size + prev_grid_x;
/* Copy displacement. */
MDisps *prev_displacement_grid = &ctx->mdisps[
coarse_poly->loopstart + prev_current_corner];
float *prev_displacement = prev_displacement_grid->disps[prev_index];
copy_v3_v3(prev_displacement,
current_displacement_grid->disps[current_index]);
SWAP(float, prev_displacement[0], prev_displacement[1]);
prev_displacement[1] = -prev_displacement[1];
/* Copy mask, if exists. */
if (current_mask_grid != NULL) {
GridPaintMask *prev_mask_grid = &ctx->grid_paint_mask[
coarse_poly->loopstart + prev_current_corner];
prev_mask_grid->data[prev_index] =
current_mask_grid->data[current_index];
}
}
static void copy_boundary_displacement(
MultiresReshapeContext *ctx,
const MPoly *coarse_poly,
const int corner,
const int grid_x, const int grid_y,
const MDisps *displacement_grid,
const GridPaintMask *mask_grid)
{
if (grid_x == 0 && grid_y == 0) {
for (int i = 0; i < coarse_poly->totloop; i++) {
const int current_face_corner =
(corner + i) % coarse_poly->totloop;
const int grid_index = coarse_poly->loopstart + current_face_corner;
MDisps *current_displacement_grid = &ctx->mdisps[grid_index];
GridPaintMask *current_mask_grid =
mask_grid != NULL ? &ctx->grid_paint_mask[grid_index]
: NULL;
multires_reshape_vertex_copy_to_next(
ctx,
coarse_poly,
current_face_corner,
current_displacement_grid,
current_mask_grid,
0, 0);
}
}
else if (grid_x == 0) {
multires_reshape_vertex_copy_to_prev(
ctx,
coarse_poly,
corner,
displacement_grid,
mask_grid,
grid_x, grid_y);
}
else if (grid_y == 0) {
multires_reshape_vertex_copy_to_next(
ctx,
coarse_poly,
corner,
displacement_grid,
mask_grid,
grid_x, grid_y);
}
}
static void multires_reshape_vertex_from_final_data(
MultiresReshapeContext *ctx,
const int ptex_face_index,
const float u, const float v,
const int coarse_poly_index,
const int coarse_corner,
const float final_P[3], const float final_mask)
{
Subdiv *subdiv = ctx->subdiv;
const int grid_size = ctx->top_grid_size;
const Mesh *coarse_mesh = ctx->coarse_mesh;
const MPoly *coarse_mpoly = coarse_mesh->mpoly;
const MPoly *coarse_poly = &coarse_mpoly[coarse_poly_index];
const int loop_index = coarse_poly->loopstart + coarse_corner;
/* Evaluate limit surface. */
float P[3], dPdu[3], dPdv[3];
BKE_subdiv_eval_limit_point_and_derivatives(
subdiv, ptex_face_index, u, v, P, dPdu, dPdv);
/* Get coordinate and corner configuration. */
float grid_u, grid_v;
MDisps *displacement_grid;
GridPaintMask *grid_paint_mask = NULL;
int face_corner = coarse_corner;
int grid_corner = 0;
int grid_index;
if (coarse_poly->totloop == 4) {
float corner_u, corner_v;
face_corner = BKE_subdiv_rotate_quad_to_corner(
u, v, &corner_u, &corner_v);
grid_corner = face_corner;
grid_index = loop_index + face_corner;
BKE_subdiv_ptex_face_uv_to_grid_uv(
corner_u, corner_v, &grid_u, &grid_v);
}
else {
grid_index = loop_index;
BKE_subdiv_ptex_face_uv_to_grid_uv(u, v, &grid_u, &grid_v);
}
displacement_grid = &ctx->mdisps[grid_index];
if (ctx->grid_paint_mask != NULL) {
grid_paint_mask = &ctx->grid_paint_mask[grid_index];
BLI_assert(grid_paint_mask->level == displacement_grid->level);
}
/* Convert object coordinate to a tangent space of displacement grid. */
float D[3];
sub_v3_v3v3(D, final_P, P);
float tangent_matrix[3][3];
BKE_multires_construct_tangent_matrix(
tangent_matrix, dPdu, dPdv, grid_corner);
float inv_tangent_matrix[3][3];
invert_m3_m3(inv_tangent_matrix, tangent_matrix);
float tangent_D[3];
mul_v3_m3v3(tangent_D, inv_tangent_matrix, D);
/* Write tangent displacement. */
const int grid_x = (grid_u * (grid_size - 1) + 0.5f);
const int grid_y = (grid_v * (grid_size - 1) + 0.5f);
const int index = grid_y * grid_size + grid_x;
copy_v3_v3(displacement_grid->disps[index], tangent_D);
/* Write mask grid. */
if (grid_paint_mask != NULL) {
grid_paint_mask->data[index] = final_mask;
}
/* Copy boundary to the next/previous grids */
copy_boundary_displacement(
ctx, coarse_poly, face_corner, grid_x, grid_y,
displacement_grid, grid_paint_mask);
}
/* =============================================================================
* Helpers to propagate displacement to higher levels.
*/
typedef struct MultiresPropagateData {
int reshape_level;
int top_level;
int num_grids;
int reshape_grid_size;
int top_grid_size;
MDisps *old_displacement_grids;
MDisps *new_displacement_grids;
GridPaintMask *grid_paint_mask;
} MultiresPropagateData;
typedef struct MultiresPropagateCornerData {
float old_coord[3];
float new_coord[3];
float coord_delta[3];
float mask;
} MultiresPropagateCornerData;
static void multires_reshape_propagate_prepare(
MultiresPropagateData *data,
Mesh *coarse_mesh,
const int reshape_level,
const int top_level)
{
BLI_assert(reshape_level <= top_level);
data->old_displacement_grids = NULL;
if (reshape_level == top_level) {
/* Nothing to do, reshape will happen on the whole grid content. */
return;
}
const int num_grids = coarse_mesh->totloop;
MDisps *mdisps = CustomData_get_layer(&coarse_mesh->ldata, CD_MDISPS);
MDisps *old_mdisps = MEM_dupallocN(mdisps);
for (int grid_index = 0; grid_index < num_grids; grid_index++) {
MDisps *displacement_grid = &mdisps[grid_index];
MDisps *old_displacement_grid = &old_mdisps[grid_index];
old_displacement_grid->totdisp = displacement_grid->totdisp;
old_displacement_grid->level = displacement_grid->level;
if (displacement_grid->disps) {
displacement_grid->disps = MEM_dupallocN(displacement_grid->disps);
}
else {
old_displacement_grid->disps = NULL;
}
/* TODO(sergey): This might be needed for proper propagation. */
old_displacement_grid->hidden = NULL;
}
data->reshape_level = reshape_level;
data->top_level = top_level;
data->num_grids = num_grids;
data->reshape_grid_size = BKE_subdiv_grid_size_from_level(reshape_level);
data->top_grid_size = BKE_subdiv_grid_size_from_level(top_level);
data->old_displacement_grids = old_mdisps;
data->new_displacement_grids = mdisps;
data->grid_paint_mask =
CustomData_get_layer(&coarse_mesh->ldata, CD_GRID_PAINT_MASK);
}
static void multires_reshape_propagate_prepare_from_mmd(
MultiresPropagateData *data,
struct Depsgraph *depsgraph,
Object *object,
const MultiresModifierData *mmd,
const int top_level,
const bool use_render_params)
{
Scene *scene_eval = DEG_get_evaluated_scene(depsgraph);
Mesh *mesh = object->data;
const int level = multires_get_level(
scene_eval, object, mmd, use_render_params, true);
multires_reshape_propagate_prepare(data, mesh, level, top_level);
}
static void multires_reshape_propagate_corner_data(
MultiresPropagateCornerData *corner,
const MDisps *old_displacement_grid,
const MDisps *new_displacement_grid,
const GridPaintMask *grid_paint_mask,
const int grid_size,
const int grid_skip,
const int reshape_x, const int reshape_y)
{
const int x = reshape_x * grid_skip;
const int y = reshape_y * grid_skip;
const int grid_index = y * grid_size + x;
if (old_displacement_grid->disps != NULL) {
copy_v3_v3(corner->old_coord, old_displacement_grid->disps[grid_index]);
}
else {
zero_v3(corner->old_coord);
}
copy_v3_v3(corner->new_coord, new_displacement_grid->disps[grid_index]);
sub_v3_v3v3(corner->coord_delta, corner->new_coord, corner->old_coord);
if (grid_paint_mask != NULL) {
corner->mask = grid_paint_mask->data[grid_index];
}
else {
corner->mask = 0.0f;
}
}
static void multires_reshape_propagate_all_corners_data(
MultiresPropagateCornerData corners[4],
const MDisps *old_displacement_grid,
const MDisps *new_displacement_grid,
const GridPaintMask *grid_paint_mask,
const int grid_size,
const int grid_skip,
const int reshape_x, const int reshape_y)
{
int corner_index = 0;
for (int dy = 0; dy <= 1; dy++) {
for (int dx = 0; dx <= 1; dx++) {
multires_reshape_propagate_corner_data(
&corners[corner_index],
old_displacement_grid,
new_displacement_grid,
grid_paint_mask,
grid_size,
grid_skip,
reshape_x + dx, reshape_y + dy);
corner_index++;
}
}
}
static void multires_reshape_propagate_interpolate_coord(
MDisps *new_displacement_grid,
const MultiresPropagateCornerData corners[4],
const float weights[4],
const int x, const int y,
const int grid_size)
{
float delta[3];
interp_v3_v3v3v3v3(
delta,
corners[0].coord_delta, corners[1].coord_delta,
corners[2].coord_delta, corners[3].coord_delta,
weights);
const int index = y * grid_size + x;
float *new_displacement = new_displacement_grid->disps[index];
add_v3_v3(new_displacement, delta);
}
static void multires_reshape_propagate_interpolate_mask(
GridPaintMask *grid_paint_mask,
const MultiresPropagateCornerData corners[4],
const float weights[4],
const int x, const int y,
const int grid_size)
{
const int index = y * grid_size + x;
grid_paint_mask->data[index] =
corners[0].mask * weights[0] +
corners[1].mask * weights[1] +
corners[2].mask * weights[2] +
corners[3].mask * weights[3];
}
static void multires_reshape_propagate_grid(
MultiresPropagateData *data,
const MDisps *old_displacement_grid,
MDisps *new_displacement_grid,
GridPaintMask *grid_paint_mask)
{
const int reshape_grid_size = data->reshape_grid_size;
const int top_grid_size = data->top_grid_size;
const int grid_skip = (top_grid_size - 1) / (reshape_grid_size - 1);
const float grid_skip_inv = 1.0f / (float)grid_skip;
for (int reshape_y = 0;
reshape_y < reshape_grid_size - 1;
reshape_y++)
{
for (int reshape_x = 0;
reshape_x < reshape_grid_size - 1;
reshape_x++)
{
MultiresPropagateCornerData corners[4];
multires_reshape_propagate_all_corners_data(
corners,
old_displacement_grid, new_displacement_grid,
grid_paint_mask,
top_grid_size,
grid_skip,
reshape_x, reshape_y);
/* Propagate to higher levels. */
for (int y = 0; y <= grid_skip; y++) {
const float v = (float)y * grid_skip_inv;
for (int x = 0; x <= grid_skip; x++) {
/* Ignorevalues at the exact locations of grid which was
* reshape. Those points already have proper displacement.
*/
if ((x == 0 && y == 0) ||
(x == grid_skip && y == 0) ||
(x == grid_skip && y == grid_skip) ||
(x == 0 && y == grid_skip))
{
continue;
}
/* Ignore right-most column and top-most row, unless this
* is a boundary of the grid, to prevent displacement
* being affected twice.
*/
if (x == grid_skip && reshape_x != reshape_grid_size - 2) {
continue;
}
if (y == grid_skip && reshape_y != reshape_grid_size - 2) {
continue;
}
const float u = (float)x * grid_skip_inv;
const int final_x = reshape_x * grid_skip + x;
const int final_y = reshape_y * grid_skip + y;
const float linear_weights[4] = {(1.0f - u) * (1.0f - v),
u * (1.0f - v),
(1.0f - u) * v,
u * v};
multires_reshape_propagate_interpolate_coord(
new_displacement_grid,
corners,
linear_weights,
final_x, final_y,
top_grid_size);
if (grid_paint_mask != NULL) {
multires_reshape_propagate_interpolate_mask(
grid_paint_mask,
corners,
linear_weights,
final_x, final_y,
top_grid_size);
}
}
}
}
}
}
static void multires_reshape_propagate(MultiresPropagateData *data)
{
if (data->old_displacement_grids == NULL) {
return;
}
const int num_grids = data->num_grids;
for (int grid_index = 0; grid_index < num_grids; grid_index++) {
const MDisps *old_displacement_grid =
&data->old_displacement_grids[grid_index];
MDisps *new_displacement_grid =
&data->new_displacement_grids[grid_index];
if (old_displacement_grid->level != new_displacement_grid->level) {
continue;
}
GridPaintMask *grid_paint_mask =
data->grid_paint_mask != NULL
? &data->grid_paint_mask[grid_index]
: NULL;
multires_reshape_propagate_grid(
data, old_displacement_grid,
new_displacement_grid,
grid_paint_mask);
}
}
static void multires_reshape_propagate_free(MultiresPropagateData *data)
{
if (data->old_displacement_grids == NULL) {
return;
}
const int num_grids = data->num_grids;
MDisps *old_mdisps = data->old_displacement_grids;
for (int grid_index = 0; grid_index < num_grids; grid_index++) {
MDisps *old_displacement_grid = &old_mdisps[grid_index];
if (old_displacement_grid->disps) {
MEM_freeN(old_displacement_grid->disps);
}
}
MEM_freeN(data->old_displacement_grids);
}
/* =============================================================================
* Reshape from deformed vertex coordinates.
*/
typedef struct MultiresReshapeFromDeformedVertsContext {
MultiresReshapeContext reshape_ctx;
const float (*deformed_verts)[3];
int num_deformed_verts;
} MultiresReshapeFromDeformedVertsContext;
static bool multires_reshape_topology_info(
const SubdivForeachContext *foreach_context,
const int num_vertices,
const int UNUSED(num_edges),
const int UNUSED(num_loops),
const int UNUSED(num_polygons))
{
MultiresReshapeFromDeformedVertsContext *ctx = foreach_context->user_data;
if (num_vertices != ctx->num_deformed_verts) {
return false;
}
return true;
}
static void multires_reshape_vertex(
MultiresReshapeFromDeformedVertsContext *ctx,
const int ptex_face_index,
const float u, const float v,
const int coarse_poly_index,
const int coarse_corner,
const int subdiv_vertex_index)
{
const float *final_P = ctx->deformed_verts[subdiv_vertex_index];
multires_reshape_vertex_from_final_data(
&ctx->reshape_ctx,
ptex_face_index, u, v,
coarse_poly_index,
coarse_corner,
final_P, 0.0f);
}
static void multires_reshape_vertex_inner(
const SubdivForeachContext *foreach_context,
void *UNUSED(tls_v),
const int ptex_face_index,
const float u, const float v,
const int coarse_poly_index,
const int coarse_corner,
const int subdiv_vertex_index)
{
MultiresReshapeFromDeformedVertsContext *ctx = foreach_context->user_data;
multires_reshape_vertex(
ctx,
ptex_face_index, u, v,
coarse_poly_index,
coarse_corner,
subdiv_vertex_index);
}
static void multires_reshape_vertex_every_corner(
const struct SubdivForeachContext *foreach_context,
void *UNUSED(tls_v),
const int ptex_face_index,
const float u, const float v,
const int UNUSED(coarse_vertex_index),
const int coarse_poly_index,
const int coarse_corner,
const int subdiv_vertex_index)
{
MultiresReshapeFromDeformedVertsContext *ctx = foreach_context->user_data;
multires_reshape_vertex(
ctx,
ptex_face_index, u, v,
coarse_poly_index,
coarse_corner,
subdiv_vertex_index);
}
static void multires_reshape_vertex_every_edge(
const struct SubdivForeachContext *foreach_context,
void *UNUSED(tls_v),
const int ptex_face_index,
const float u, const float v,
const int UNUSED(coarse_edge_index),
const int coarse_poly_index,
const int coarse_corner,
const int subdiv_vertex_index)
{
MultiresReshapeFromDeformedVertsContext *ctx = foreach_context->user_data;
multires_reshape_vertex(
ctx,
ptex_face_index, u, v,
coarse_poly_index,
coarse_corner,
subdiv_vertex_index);
}
static Subdiv *multires_create_subdiv_for_reshape(
struct Depsgraph *depsgraph,
/*const*/ Object *object,
const MultiresModifierData *mmd)
{
Scene *scene_eval = DEG_get_evaluated_scene(depsgraph);
Object *object_eval = DEG_get_evaluated_object(depsgraph, object);
Mesh *deformed_mesh = mesh_get_eval_deform(
depsgraph, scene_eval, object_eval, CD_MASK_BAREMESH);
SubdivSettings subdiv_settings;
BKE_multires_subdiv_settings_init(&subdiv_settings, mmd);
Subdiv *subdiv = BKE_subdiv_new_from_mesh(&subdiv_settings, deformed_mesh);
if (!BKE_subdiv_eval_update_from_mesh(subdiv, deformed_mesh)) {
BKE_subdiv_free(subdiv);
return NULL;
}
return subdiv;
}
static bool multires_reshape_from_vertcos(
struct Depsgraph *depsgraph,
Object *object,
const MultiresModifierData *mmd,
const float (*deformed_verts)[3],
const int num_deformed_verts,
const bool use_render_params)
{
Scene *scene_eval = DEG_get_evaluated_scene(depsgraph);
Mesh *coarse_mesh = object->data;
MDisps *mdisps = CustomData_get_layer(&coarse_mesh->ldata, CD_MDISPS);
/* Make sure displacement grids are ready. */
multires_reshape_ensure_grids(coarse_mesh, mmd->totlvl);
/* Pick maximum between multires level and dispalcement level.
* This is because mesh can be used by objects with multires at different
* levels.
*
* TODO(sergey): At this point it should be possible to always use
* mdisps->level.
*/
const int top_level = max_ii(mmd->totlvl, mdisps->level);
/* Construct context. */
MultiresReshapeFromDeformedVertsContext reshape_deformed_verts_ctx = {
.reshape_ctx = {
.coarse_mesh = coarse_mesh,
.mdisps = mdisps,
.grid_paint_mask = NULL,
.top_grid_size = BKE_subdiv_grid_size_from_level(top_level),
.top_level = top_level,
},
.deformed_verts = deformed_verts,
.num_deformed_verts = num_deformed_verts,
};
SubdivForeachContext foreach_context = {
.topology_info = multires_reshape_topology_info,
.vertex_inner = multires_reshape_vertex_inner,
.vertex_every_edge = multires_reshape_vertex_every_edge,
.vertex_every_corner = multires_reshape_vertex_every_corner,
.user_data = &reshape_deformed_verts_ctx,
};
/* Initialize subdivision surface. */
Subdiv *subdiv = multires_create_subdiv_for_reshape(depsgraph, object, mmd);
if (subdiv == NULL) {
return false;
}
reshape_deformed_verts_ctx.reshape_ctx.subdiv = subdiv;
/* Initialize mesh rasterization settings. */
SubdivToMeshSettings mesh_settings;
BKE_multires_subdiv_mesh_settings_init(
&mesh_settings, scene_eval, object, mmd, use_render_params, true);
/* Initialize propagation to higher levels. */
MultiresPropagateData propagate_data;
multires_reshape_propagate_prepare_from_mmd(
&propagate_data, depsgraph, object, mmd, top_level, use_render_params);
/* Run all the callbacks. */
BKE_subdiv_foreach_subdiv_geometry(
subdiv,
&foreach_context,
&mesh_settings,
coarse_mesh);
BKE_subdiv_free(subdiv);
/* Update higher levels if needed. */
multires_reshape_propagate(&propagate_data);
multires_reshape_propagate_free(&propagate_data);
return true;
}
/* =============================================================================
* Reshape from object.
*/
/* Returns truth on success, false otherwise.
*
* This function might fail in cases like source and destination not having
* matched amount of vertices.
*/
bool multiresModifier_reshapeFromObject(
struct Depsgraph *depsgraph,
MultiresModifierData *mmd,
Object *dst,
Object *src)
{
/* Would be cool to support this eventually, but it is very tricky to match
* vertices order even for meshes, when mixing meshes and other objects it's
* even more tricky.
*/
if (src->type != OB_MESH) {
return false;
}
MultiresModifierData reshape_mmd;
multires_reshape_init_mmd(&reshape_mmd, mmd);
/* Get evaluated vertices locations to reshape to. */
Scene *scene_eval = DEG_get_evaluated_scene(depsgraph);
Object *src_eval = DEG_get_evaluated_object(depsgraph, src);
Mesh *src_mesh_eval = mesh_get_eval_final(
depsgraph, scene_eval, src_eval, CD_MASK_BAREMESH);
int num_deformed_verts;
float (*deformed_verts)[3] = BKE_mesh_vertexCos_get(
src_mesh_eval, &num_deformed_verts);
bool result = multires_reshape_from_vertcos(
depsgraph,
dst,
&reshape_mmd,
deformed_verts,
num_deformed_verts,
false);
MEM_freeN(deformed_verts);
return result;
}
/* =============================================================================
* Reshape from modifier.
*/
bool multiresModifier_reshapeFromDeformModifier(
struct Depsgraph *depsgraph,
MultiresModifierData *mmd,
Object *object,
ModifierData *md)
{
MultiresModifierData highest_mmd;
/* It is possible that the current subdivision level of multires is lower
* that it's maximum possible one (i.e., viewport is set to a lower level
* for the performance purposes). But even then, we want all the multires
* levels to be reshaped. Most accurate way to do so is to ignore all
* simplifications and calculate deformation modifier for the highest
* possible multires level.
* Alternative would be propagate displacement from current level to a
* higher ones, but that is likely to cause artifacts.
*/
multires_reshape_init_mmd_top_level(&highest_mmd, mmd);
Scene *scene_eval = DEG_get_evaluated_scene(depsgraph);
/* Perform sanity checks and early output. */
if (multires_get_level(
scene_eval, object, &highest_mmd, false, true) == 0)
{
return false;
}
/* Create mesh for the multires, ignoring any further modifiers (leading
* deformation modifiers will be applied though).
*/
Mesh *multires_mesh = BKE_multires_create_mesh(
depsgraph, scene_eval, &highest_mmd, object);
int num_deformed_verts;
float (*deformed_verts)[3] = BKE_mesh_vertexCos_get(
multires_mesh, &num_deformed_verts);
/* Apply deformation modifier on the multires, */
const ModifierEvalContext modifier_ctx = {
.depsgraph = depsgraph,
.object = object,
.flag = MOD_APPLY_USECACHE | MOD_APPLY_IGNORE_SIMPLIFY};
modwrap_deformVerts(
md, &modifier_ctx, multires_mesh, deformed_verts,
multires_mesh->totvert);
BKE_id_free(NULL, multires_mesh);
/* Reshaping */
bool result = multires_reshape_from_vertcos(
depsgraph,
object,
&highest_mmd,
deformed_verts,
num_deformed_verts,
false);
/* Cleanup */
MEM_freeN(deformed_verts);
return result;
}
/* =============================================================================
* Reshape from grids.
*/
typedef struct ReshapeFromCCGTaskData {
MultiresReshapeContext reshape_ctx;
int *face_ptex_offset;
const CCGKey *key;
/*const*/ CCGElem **grids;
} ReshapeFromCCGTaskData;
static void reshape_from_ccg_regular_face(ReshapeFromCCGTaskData *data,
const MPoly *coarse_poly)
{
const CCGKey *key = data->key;
/*const*/ CCGElem **grids = data->grids;
const Mesh *coarse_mesh = data->reshape_ctx.coarse_mesh;
const MPoly *coarse_mpoly = coarse_mesh->mpoly;
const int key_grid_size = key->grid_size;
const int key_grid_size_1 = key_grid_size - 1;
const int resolution = 2 * key_grid_size - 1;
const float resolution_1_inv = 1.0f / (float)(resolution - 1);
const int coarse_poly_index = coarse_poly - coarse_mpoly;
const int ptex_face_index = data->face_ptex_offset[coarse_poly_index];
for (int y = 0; y < resolution; y++) {
const float v = y * resolution_1_inv;
for (int x = 0; x < resolution; x++) {
const float u = x * resolution_1_inv;
float corner_u, corner_v;
float grid_u, grid_v;
const int face_corner = BKE_subdiv_rotate_quad_to_corner(
u, v, &corner_u, &corner_v);
BKE_subdiv_ptex_face_uv_to_grid_uv(
corner_u, corner_v, &grid_u, &grid_v);
/*const*/ CCGElem *grid =
grids[coarse_poly->loopstart + face_corner];
/*const*/ CCGElem *grid_element = CCG_grid_elem(
key,
grid,
key_grid_size_1 * grid_u,
key_grid_size_1 * grid_v);
const float *final_P = CCG_elem_co(key, grid_element);
float final_mask = 0.0f;
if (key->has_mask) {
final_mask = *CCG_elem_mask(key, grid_element);
}
multires_reshape_vertex_from_final_data(
&data->reshape_ctx,
ptex_face_index,
u, v,
coarse_poly_index,
0,
final_P, final_mask);
}
}
}
static void reshape_from_ccg_special_face(ReshapeFromCCGTaskData *data,
const MPoly *coarse_poly)
{
const CCGKey *key = data->key;
/*const*/ CCGElem **grids = data->grids;
const Mesh *coarse_mesh = data->reshape_ctx.coarse_mesh;
const MPoly *coarse_mpoly = coarse_mesh->mpoly;
const int key_grid_size = key->grid_size;
const int key_grid_size_1 = key_grid_size - 1;
const int resolution = key_grid_size;
const float resolution_1_inv = 1.0f / (float)(resolution - 1);
const int coarse_poly_index = coarse_poly - coarse_mpoly;
const int ptex_face_index = data->face_ptex_offset[coarse_poly_index];
for (int corner = 0; corner < coarse_poly->totloop; corner++) {
for (int y = 0; y < resolution; y++) {
const float v = y * resolution_1_inv;
for (int x = 0; x < resolution; x++) {
const float u = x * resolution_1_inv;
float grid_u, grid_v;
BKE_subdiv_ptex_face_uv_to_grid_uv(u, v, &grid_u, &grid_v);
/*const*/ CCGElem *grid =
grids[coarse_poly->loopstart + corner];
/*const*/ CCGElem *grid_element = CCG_grid_elem(
key,
grid,
key_grid_size_1 * grid_u,
key_grid_size_1 * grid_v);
const float *final_P = CCG_elem_co(key, grid_element);
float final_mask = 0.0f;
if (key->has_mask) {
final_mask = *CCG_elem_mask(key, grid_element);
}
multires_reshape_vertex_from_final_data(
&data->reshape_ctx,
ptex_face_index + corner,
u, v,
coarse_poly_index,
corner,
final_P, final_mask);
}
}
}
}
static void reshape_from_ccg_task(
void *__restrict userdata,
const int coarse_poly_index,
const ParallelRangeTLS *__restrict UNUSED(tls))
{
ReshapeFromCCGTaskData *data = userdata;
const Mesh *coarse_mesh = data->reshape_ctx.coarse_mesh;
const MPoly *coarse_mpoly = coarse_mesh->mpoly;
const MPoly *coarse_poly = &coarse_mpoly[coarse_poly_index];
if (coarse_poly->totloop == 4) {
reshape_from_ccg_regular_face(data, coarse_poly);
}
else {
reshape_from_ccg_special_face(data, coarse_poly);
}
}
bool multiresModifier_reshapeFromCCG(
const int tot_level,
Mesh *coarse_mesh,
SubdivCCG *subdiv_ccg)
{
CCGKey key;
BKE_subdiv_ccg_key_top_level(&key, subdiv_ccg);
/* Sanity checks. */
if (coarse_mesh->totloop != subdiv_ccg->num_grids) {
/* Grids are supposed to eb created for each face-cornder (aka loop). */
return false;
}
MDisps *mdisps = CustomData_get_layer(&coarse_mesh->ldata, CD_MDISPS);
GridPaintMask *grid_paint_mask =
CustomData_get_layer(&coarse_mesh->ldata, CD_GRID_PAINT_MASK);
Subdiv *subdiv = subdiv_ccg->subdiv;
/* Make sure displacement grids are ready. */
multires_reshape_ensure_grids(coarse_mesh, tot_level);
/* Pick maximum between multires level and dispalcement level.
* This is because mesh can be used by objects with multires at different
* levels.
*
* TODO(sergey): At this point it should be possible to always use
* mdisps->level.
*/
const int top_level = max_ii(tot_level, mdisps->level);
/* Construct context. */
ReshapeFromCCGTaskData data = {
.reshape_ctx = {
.subdiv = subdiv,
.coarse_mesh = coarse_mesh,
.mdisps = mdisps,
.grid_paint_mask = grid_paint_mask,
.top_grid_size = BKE_subdiv_grid_size_from_level(top_level),
.top_level = top_level},
.face_ptex_offset = BKE_subdiv_face_ptex_offset_get(subdiv),
.key = &key,
.grids = subdiv_ccg->grids};
/* Initialize propagation to higher levels. */
MultiresPropagateData propagate_data;
multires_reshape_propagate_prepare(
&propagate_data, coarse_mesh, key.level, top_level);
/* Threaded grids iteration. */
ParallelRangeSettings parallel_range_settings;
BLI_parallel_range_settings_defaults(&parallel_range_settings);
BLI_task_parallel_range(0, coarse_mesh->totpoly,
&data,
reshape_from_ccg_task,
&parallel_range_settings);
/* Update higher levels if needed. */
multires_reshape_propagate(&propagate_data);
multires_reshape_propagate_free(&propagate_data);
return true;
}
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