From 7a8a074a30b045eafbef6eeb5293f1e76a3cb5a7 Mon Sep 17 00:00:00 2001 From: Sergey Sharybin Date: Fri, 28 Feb 2020 12:30:25 +0100 Subject: Multires: Move current reshaping/propagation logic to legacy file It will eventually rewritten. This commit prepares some clean space to start this process. So far no functional changes. --- .../blender/blenkernel/intern/multires_reshape.c | 1056 -------------------- 1 file changed, 1056 deletions(-) delete mode 100644 source/blender/blenkernel/intern/multires_reshape.c (limited to 'source/blender/blenkernel/intern/multires_reshape.c') diff --git a/source/blender/blenkernel/intern/multires_reshape.c b/source/blender/blenkernel/intern/multires_reshape.c deleted file mode 100644 index 0a8248b25f1..00000000000 --- a/source/blender/blenkernel/intern/multires_reshape.c +++ /dev/null @@ -1,1056 +0,0 @@ -/* - * 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. - */ - -/** \file - * \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_lib_id.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; - /* Indexed by coarse face index, returns first ptex face index corresponding - * to that coarse face. */ - int *face_ptex_offset; -} 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"); - if (displacement_grid->disps != NULL) { - MEM_freeN(displacement_grid->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 && displacement_grid->level == level) { - 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); -} - -/* Convert normalized coordinate within a grid to a normalized coordinate within - * a ptex face. */ -static void multires_reshape_corner_coord_to_ptex(const MPoly *coarse_poly, - const int corner, - const float corner_u, - const float corner_v, - float *r_ptex_face_u, - float *r_ptex_face_v) -{ - if (coarse_poly->totloop == 4) { - float grid_u, grid_v; - BKE_subdiv_ptex_face_uv_to_grid_uv(corner_u, corner_v, &grid_u, &grid_v); - BKE_subdiv_rotate_grid_to_quad(corner, grid_u, grid_v, r_ptex_face_u, r_ptex_face_v); - } - else { - *r_ptex_face_u = corner_u; - *r_ptex_face_v = corner_v; - } -} - -/* NOTE: The tangent vectors are measured in ptex face normalized coordinates, - * which is different from grid tangent. */ -static void multires_reshape_sample_surface(Subdiv *subdiv, - const MPoly *coarse_poly, - const int corner, - const float corner_u, - const float corner_v, - const int ptex_face_index, - float r_P[3], - float r_dPdu[3], - float r_dPdv[3]) -{ - float ptex_face_u, ptex_face_v; - multires_reshape_corner_coord_to_ptex( - coarse_poly, corner, corner_u, corner_v, &ptex_face_u, &ptex_face_v); - BKE_subdiv_eval_limit_point_and_derivatives( - subdiv, ptex_face_index, ptex_face_u, ptex_face_v, r_P, r_dPdu, r_dPdv); -} - -static void multires_reshape_tangent_matrix_for_corner(const MPoly *coarse_poly, - const int coarse_corner, - const float dPdu[3], - const float dPdv[3], - float r_tangent_matrix[3][3]) -{ - /* For a quad faces we would need to flip the tangent, since they will use - * use different coordinates within displacement grid comparent to ptex - * face. */ - const bool is_quad = (coarse_poly->totloop == 4); - const int tangent_corner = is_quad ? coarse_corner : 0; - BKE_multires_construct_tangent_matrix(r_tangent_matrix, dPdu, dPdv, tangent_corner); -} - -static void multires_reshape_vertex_from_final_data(MultiresReshapeContext *ctx, - const int ptex_face_index, - const float corner_u, - const float corner_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]; - multires_reshape_sample_surface( - subdiv, coarse_poly, coarse_corner, corner_u, corner_v, ptex_face_index, P, dPdu, dPdv); - /* Construct tangent matrix which matches orientation of the current - * displacement grid. */ - float tangent_matrix[3][3], inv_tangent_matrix[3][3]; - multires_reshape_tangent_matrix_for_corner( - coarse_poly, coarse_corner, dPdu, dPdv, tangent_matrix); - invert_m3_m3(inv_tangent_matrix, tangent_matrix); - /* Convert object coordinate to a tangent space of displacement grid. */ - float D[3]; - sub_v3_v3v3(D, final_P, P); - float tangent_D[3]; - mul_v3_m3v3(tangent_D, inv_tangent_matrix, D); - /* Calculate index of element within the grid. */ - float grid_u, grid_v; - BKE_subdiv_ptex_face_uv_to_grid_uv(corner_u, corner_v, &grid_u, &grid_v); - 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; - /* Write tangent displacement. */ - MDisps *displacement_grid = &ctx->mdisps[loop_index]; - copy_v3_v3(displacement_grid->disps[index], tangent_D); - /* Write mask grid. */ - if (ctx->grid_paint_mask != NULL) { - GridPaintMask *grid_paint_mask = &ctx->grid_paint_mask[loop_index]; - BLI_assert(grid_paint_mask->level == displacement_grid->level); - grid_paint_mask->data[index] = final_mask; - } -} - -/* ============================================================================= - * Helpers to propagate displacement to higher levels. - */ - -typedef struct MultiresPropagateData { - /* Number of displacement grids. */ - int num_grids; - /* Resolution level up to which displacement is known. */ - int reshape_level; - /* Resolution up to which propagation is happening, affecting all the - * levels in [reshape_level + 1, top_level]. */ - int top_level; - /* Grid sizes at the corresponding levels. */ - int reshape_grid_size; - int top_grid_size; - /* Keys to access CCG at different levels. */ - CCGKey reshape_level_key; - CCGKey top_level_key; - /* Original grid data, before any updates for reshape. - * Contains data at the reshape_level resolution level. */ - CCGElem **orig_grids_data; - /* Custom data layers from a coarse mesh. */ - MDisps *mdisps; - GridPaintMask *grid_paint_mask; -} MultiresPropagateData; - -static CCGElem **allocate_grids(CCGKey *key, int num_grids) -{ - CCGElem **grids = MEM_calloc_arrayN(num_grids, sizeof(CCGElem *), "reshape grids*"); - for (int grid_index = 0; grid_index < num_grids; grid_index++) { - grids[grid_index] = MEM_calloc_arrayN( - key->elem_size, key->grid_area, "reshape orig_grids_data elems"); - } - return grids; -} - -static void free_grids(CCGElem **grids, int num_grids) -{ - if (grids == NULL) { - return; - } - for (int grid_index = 0; grid_index < num_grids; grid_index++) { - MEM_freeN(grids[grid_index]); - } - MEM_freeN(grids); -} - -/* Initialize element sizes and offsets. */ -static void multires_reshape_init_key_layers(CCGKey *key, const MultiresPropagateData *data) -{ - key->elem_size = 3 * sizeof(float); - if (data->grid_paint_mask != NULL) { - key->mask_offset = 3 * sizeof(float); - key->elem_size += sizeof(float); - key->has_mask = true; - } - else { - key->mask_offset = -1; - key->has_mask = false; - } - /* We never have normals in original grids. */ - key->normal_offset = -1; - key->has_normals = false; -} - -/* Initialize key used to access reshape grids at given level. */ -static void multires_reshape_init_level_key(CCGKey *key, - const MultiresPropagateData *data, - const int level) -{ - key->level = level; - /* Init layers. */ - multires_reshape_init_key_layers(key, data); - /* By default, only 3 floats for coordinate, */ - key->grid_size = BKE_subdiv_grid_size_from_level(key->level); - key->grid_area = key->grid_size * key->grid_size; - key->grid_bytes = key->elem_size * key->grid_area; -} - -static void multires_reshape_store_original_grids(MultiresPropagateData *data) -{ - const int num_grids = data->num_grids; - /* Original data to be backed up. */ - const MDisps *mdisps = data->mdisps; - const GridPaintMask *grid_paint_mask = data->grid_paint_mask; - /* Allocate grids for backup. */ - CCGKey *orig_key = &data->reshape_level_key; - CCGElem **orig_grids_data = allocate_grids(orig_key, num_grids); - /* Fill in grids. */ - const int orig_grid_size = data->reshape_grid_size; - const int top_grid_size = data->top_grid_size; - const int skip = (top_grid_size - 1) / (orig_grid_size - 1); - for (int grid_index = 0; grid_index < num_grids; grid_index++) { - CCGElem *orig_grid = orig_grids_data[grid_index]; - for (int y = 0; y < orig_grid_size; y++) { - const int top_y = y * skip; - for (int x = 0; x < orig_grid_size; x++) { - const int top_x = x * skip; - const int top_index = top_y * top_grid_size + top_x; - memcpy(CCG_grid_elem_co(orig_key, orig_grid, x, y), - mdisps[grid_index].disps[top_index], - sizeof(float) * 3); - if (orig_key->has_mask) { - *CCG_grid_elem_mask( - orig_key, orig_grid, x, y) = grid_paint_mask[grid_index].data[top_index]; - } - } - } - } - /* Store in the context. */ - data->orig_grids_data = orig_grids_data; -} - -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); - memset(data, 0, sizeof(*data)); - data->num_grids = coarse_mesh->totloop; - data->reshape_level = reshape_level; - data->top_level = top_level; - if (reshape_level == top_level) { - /* Nothing to do, reshape will happen on the whole grid content. */ - return; - } - data->mdisps = CustomData_get_layer(&coarse_mesh->ldata, CD_MDISPS); - data->grid_paint_mask = CustomData_get_layer(&coarse_mesh->ldata, CD_GRID_PAINT_MASK); - data->top_grid_size = BKE_subdiv_grid_size_from_level(top_level); - data->reshape_grid_size = BKE_subdiv_grid_size_from_level(reshape_level); - /* Initialize keys to access CCG at different levels. */ - multires_reshape_init_level_key(&data->reshape_level_key, data, data->reshape_level); - multires_reshape_init_level_key(&data->top_level_key, data, data->top_level); - /* Make a copy of grids before reshaping, so we can calculate deltas - * later on. */ - multires_reshape_store_original_grids(data); -} - -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) -{ - /* TODO(sergey): Find mode reliable way of getting current level. */ - 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); -} - -/* Calculate delta of changed reshape level data layers. Delta goes to a - * grids at top level (meaning, the result grids are only partially filled - * in). */ -static void multires_reshape_calculate_delta(MultiresPropagateData *data, - CCGElem **delta_grids_data) -{ - const int num_grids = data->num_grids; - /* At this point those custom data layers has updated data for the - * level we are propagating from. */ - const MDisps *mdisps = data->mdisps; - const GridPaintMask *grid_paint_mask = data->grid_paint_mask; - CCGKey *reshape_key = &data->reshape_level_key; - CCGKey *delta_level_key = &data->top_level_key; - /* Calculate delta. */ - const int top_grid_size = data->top_grid_size; - const int reshape_grid_size = data->reshape_grid_size; - const int delta_grid_size = data->top_grid_size; - const int skip = (top_grid_size - 1) / (reshape_grid_size - 1); - for (int grid_index = 0; grid_index < num_grids; grid_index++) { - /*const*/ CCGElem *orig_grid = data->orig_grids_data[grid_index]; - CCGElem *delta_grid = delta_grids_data[grid_index]; - for (int y = 0; y < reshape_grid_size; y++) { - const int top_y = y * skip; - for (int x = 0; x < reshape_grid_size; x++) { - const int top_x = x * skip; - const int top_index = top_y * delta_grid_size + top_x; - sub_v3_v3v3(CCG_grid_elem_co(delta_level_key, delta_grid, top_x, top_y), - mdisps[grid_index].disps[top_index], - CCG_grid_elem_co(reshape_key, orig_grid, x, y)); - if (delta_level_key->has_mask) { - const float old_mask_value = *CCG_grid_elem_mask(reshape_key, orig_grid, x, y); - const float new_mask_value = grid_paint_mask[grid_index].data[top_index]; - *CCG_grid_elem_mask(delta_level_key, delta_grid, top_x, top_y) = new_mask_value - - old_mask_value; - } - } - } - } -} - -/* Makes it so delta is propagated onto all the higher levels, but is also - * that this delta is smoothed in a way that it does not cause artifacts on - * boundaries. */ - -typedef struct MultiresPropagateCornerData { - float coord_delta[3]; - float mask_delta; -} MultiresPropagateCornerData; - -BLI_INLINE void multires_reshape_propagate_init_patch_corners( - MultiresPropagateData *data, - CCGElem *delta_grid, - const int patch_x, - const int patch_y, - MultiresPropagateCornerData r_corners[4]) -{ - CCGKey *delta_level_key = &data->top_level_key; - const int orig_grid_size = data->reshape_grid_size; - const int top_grid_size = data->top_grid_size; - const int skip = (top_grid_size - 1) / (orig_grid_size - 1); - const int x = patch_x * skip; - const int y = patch_y * skip; - /* Store coordinate deltas. */ - copy_v3_v3(r_corners[0].coord_delta, CCG_grid_elem_co(delta_level_key, delta_grid, x, y)); - copy_v3_v3(r_corners[1].coord_delta, CCG_grid_elem_co(delta_level_key, delta_grid, x + skip, y)); - copy_v3_v3(r_corners[2].coord_delta, CCG_grid_elem_co(delta_level_key, delta_grid, x, y + skip)); - copy_v3_v3(r_corners[3].coord_delta, - CCG_grid_elem_co(delta_level_key, delta_grid, x + skip, y + skip)); - if (delta_level_key->has_mask) { - r_corners[0].mask_delta = *CCG_grid_elem_mask(delta_level_key, delta_grid, x, y); - r_corners[1].mask_delta = *CCG_grid_elem_mask(delta_level_key, delta_grid, x + skip, y); - r_corners[2].mask_delta = *CCG_grid_elem_mask(delta_level_key, delta_grid, x, y + skip); - r_corners[3].mask_delta = *CCG_grid_elem_mask(delta_level_key, delta_grid, x + skip, y + skip); - } -} - -BLI_INLINE void multires_reshape_propagate_interpolate_coord( - float delta[3], const MultiresPropagateCornerData corners[4], const float weights[4]) -{ - interp_v3_v3v3v3v3(delta, - corners[0].coord_delta, - corners[1].coord_delta, - corners[2].coord_delta, - corners[3].coord_delta, - weights); -} - -BLI_INLINE float multires_reshape_propagate_interpolate_mask( - const MultiresPropagateCornerData corners[4], const float weights[4]) -{ - return corners[0].mask_delta * weights[0] + corners[1].mask_delta * weights[1] + - corners[2].mask_delta * weights[2] + corners[3].mask_delta * weights[3]; -} - -BLI_INLINE void multires_reshape_propagate_and_smooth_delta_grid_patch(MultiresPropagateData *data, - CCGElem *delta_grid, - const int patch_x, - const int patch_y) -{ - CCGKey *delta_level_key = &data->top_level_key; - const int orig_grid_size = data->reshape_grid_size; - const int top_grid_size = data->top_grid_size; - const int skip = (top_grid_size - 1) / (orig_grid_size - 1); - const float skip_inv = 1.0f / (float)skip; - MultiresPropagateCornerData corners[4]; - multires_reshape_propagate_init_patch_corners(data, delta_grid, patch_x, patch_y, corners); - const int start_x = patch_x * skip; - const int start_y = patch_y * skip; - for (int y = 0; y <= skip; y++) { - const float v = (float)y * skip_inv; - const int final_y = start_y + y; - for (int x = 0; x <= skip; x++) { - const float u = (float)x * skip_inv; - const int final_x = start_x + x; - 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( - CCG_grid_elem_co(delta_level_key, delta_grid, final_x, final_y), - corners, - linear_weights); - if (delta_level_key->has_mask) { - float *mask = CCG_grid_elem_mask(delta_level_key, delta_grid, final_x, final_y); - *mask = multires_reshape_propagate_interpolate_mask(corners, linear_weights); - } - } - } -} - -BLI_INLINE void multires_reshape_propagate_and_smooth_delta_grid(MultiresPropagateData *data, - CCGElem *delta_grid) -{ - const int orig_grid_size = data->reshape_grid_size; - for (int patch_y = 0; patch_y < orig_grid_size - 1; patch_y++) { - for (int patch_x = 0; patch_x < orig_grid_size - 1; patch_x++) { - multires_reshape_propagate_and_smooth_delta_grid_patch(data, delta_grid, patch_x, patch_y); - } - } -} - -/* Entry point to propagate+smooth. */ -static void multires_reshape_propagate_and_smooth_delta(MultiresPropagateData *data, - CCGElem **delta_grids_data) -{ - const int num_grids = data->num_grids; - for (int grid_index = 0; grid_index < num_grids; grid_index++) { - CCGElem *delta_grid = delta_grids_data[grid_index]; - multires_reshape_propagate_and_smooth_delta_grid(data, delta_grid); - } -} - -/* Apply smoothed deltas on the actual data layers. */ -static void multires_reshape_propagate_apply_delta(MultiresPropagateData *data, - CCGElem **delta_grids_data) -{ - const int num_grids = data->num_grids; - /* At this point those custom data layers has updated data for the - * level we are propagating from. */ - MDisps *mdisps = data->mdisps; - GridPaintMask *grid_paint_mask = data->grid_paint_mask; - CCGKey *orig_key = &data->reshape_level_key; - CCGKey *delta_level_key = &data->top_level_key; - CCGElem **orig_grids_data = data->orig_grids_data; - const int orig_grid_size = data->reshape_grid_size; - const int top_grid_size = data->top_grid_size; - const int skip = (top_grid_size - 1) / (orig_grid_size - 1); - /* Restore grid values at the reshape level. Those values are to be changed - * to the accommodate for the smooth delta. */ - for (int grid_index = 0; grid_index < num_grids; grid_index++) { - CCGElem *orig_grid = orig_grids_data[grid_index]; - for (int y = 0; y < orig_grid_size; y++) { - const int top_y = y * skip; - for (int x = 0; x < orig_grid_size; x++) { - const int top_x = x * skip; - const int top_index = top_y * top_grid_size + top_x; - copy_v3_v3(mdisps[grid_index].disps[top_index], - CCG_grid_elem_co(orig_key, orig_grid, x, y)); - if (grid_paint_mask != NULL) { - grid_paint_mask[grid_index].data[top_index] = *CCG_grid_elem_mask( - orig_key, orig_grid, x, y); - } - } - } - } - /* Add smoothed delta to all the levels. */ - for (int grid_index = 0; grid_index < num_grids; grid_index++) { - CCGElem *delta_grid = delta_grids_data[grid_index]; - for (int y = 0; y < top_grid_size; y++) { - for (int x = 0; x < top_grid_size; x++) { - const int top_index = y * top_grid_size + x; - add_v3_v3(mdisps[grid_index].disps[top_index], - CCG_grid_elem_co(delta_level_key, delta_grid, x, y)); - if (delta_level_key->has_mask) { - grid_paint_mask[grid_index].data[top_index] += *CCG_grid_elem_mask( - delta_level_key, delta_grid, x, y); - } - } - } - } -} - -static void multires_reshape_propagate(MultiresPropagateData *data) -{ - if (data->reshape_level == data->top_level) { - return; - } - const int num_grids = data->num_grids; - /* Calculate delta made at the reshape level. */ - CCGKey *delta_level_key = &data->top_level_key; - CCGElem **delta_grids_data = allocate_grids(delta_level_key, num_grids); - multires_reshape_calculate_delta(data, delta_grids_data); - /* Propagate deltas to the higher levels. */ - multires_reshape_propagate_and_smooth_delta(data, delta_grids_data); - /* Finally, apply smoothed deltas. */ - multires_reshape_propagate_apply_delta(data, delta_grids_data); - /* Cleanup. */ - free_grids(delta_grids_data, num_grids); -} - -static void multires_reshape_propagate_free(MultiresPropagateData *data) -{ - free_grids(data->orig_grids_data, data->num_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; -} - -/* Will run reshaping for all grid elements which are adjacent to the given - * one. This is the way to ensure continuity of displacement stored in the - * grids across the inner boundaries of the grids. */ -static void multires_reshape_neighour_boundary_vertices(MultiresReshapeContext *ctx, - const int UNUSED(ptex_face_index), - const float corner_u, - const float corner_v, - const int coarse_poly_index, - const int coarse_corner, - const float final_P[3], - const float final_mask) -{ - 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 num_corners = coarse_poly->totloop; - const int start_ptex_face_index = ctx->face_ptex_offset[coarse_poly_index]; - const bool is_quad = (coarse_poly->totloop == 4); - if (corner_u == 1.0f && corner_v == 1.0f) { - for (int current_corner = 0; current_corner < num_corners; current_corner++) { - if (current_corner == coarse_corner) { - continue; - } - const int current_ptex_face_index = is_quad ? start_ptex_face_index : - start_ptex_face_index + current_corner; - multires_reshape_vertex_from_final_data(ctx, - current_ptex_face_index, - 1.0f, - 1.0f, - coarse_poly_index, - current_corner, - final_P, - final_mask); - } - } - else if (corner_u == 1.0f) { - const float next_corner_index = (coarse_corner + 1) % num_corners; - const float next_corner_u = corner_v; - const float next_corner_v = 1.0f; - const int next_ptex_face_index = is_quad ? start_ptex_face_index : - start_ptex_face_index + next_corner_index; - multires_reshape_vertex_from_final_data(ctx, - next_ptex_face_index, - next_corner_u, - next_corner_v, - coarse_poly_index, - next_corner_index, - final_P, - final_mask); - } - else if (corner_v == 1.0f) { - const float prev_corner_index = (coarse_corner + num_corners - 1) % num_corners; - const float prev_corner_u = 1.0f; - const float prev_corner_v = corner_u; - const int prev_ptex_face_index = is_quad ? start_ptex_face_index : - start_ptex_face_index + prev_corner_index; - multires_reshape_vertex_from_final_data(ctx, - prev_ptex_face_index, - prev_corner_u, - prev_corner_v, - coarse_poly_index, - prev_corner_index, - final_P, - final_mask); - } -} - -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]; - const Mesh *coarse_mesh = ctx->reshape_ctx.coarse_mesh; - const MPoly *coarse_mpoly = coarse_mesh->mpoly; - const MPoly *coarse_poly = &coarse_mpoly[coarse_poly_index]; - const bool is_quad = (coarse_poly->totloop == 4); - float corner_u, corner_v; - int actual_coarse_corner; - if (is_quad) { - actual_coarse_corner = BKE_subdiv_rotate_quad_to_corner(u, v, &corner_u, &corner_v); - } - else { - actual_coarse_corner = coarse_corner; - corner_u = u; - corner_v = v; - } - multires_reshape_vertex_from_final_data(&ctx->reshape_ctx, - ptex_face_index, - corner_u, - corner_v, - coarse_poly_index, - actual_coarse_corner, - final_P, - 0.0f); - multires_reshape_neighour_boundary_vertices(&ctx->reshape_ctx, - ptex_face_index, - corner_u, - corner_v, - coarse_poly_index, - actual_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, NULL)) { - 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); - /* Pick maximum between multires level and displacement 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); - /* Make sure displacement grids are ready. */ - multires_reshape_ensure_grids(coarse_mesh, top_level); - /* Initialize subdivision surface. */ - Subdiv *subdiv = multires_create_subdiv_for_reshape(depsgraph, object, mmd); - if (subdiv == NULL) { - return false; - } - /* Construct context. */ - MultiresReshapeFromDeformedVertsContext reshape_deformed_verts_ctx = { - .reshape_ctx = - { - .subdiv = subdiv, - .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, - .face_ptex_offset = BKE_subdiv_face_ptex_offset_get(subdiv), - }, - .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 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_vert_coords_alloc(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_vert_coords_alloc(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; - const CCGKey *key; - /*const*/ CCGElem **grids; -} ReshapeFromCCGTaskData; - -static void reshape_from_ccg_task(void *__restrict userdata, - const int coarse_poly_index, - const TaskParallelTLS *__restrict UNUSED(tls)) -{ - ReshapeFromCCGTaskData *data = userdata; - 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 MPoly *coarse_poly = &coarse_mpoly[coarse_poly_index]; - 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 start_ptex_face_index = data->reshape_ctx.face_ptex_offset[coarse_poly_index]; - const bool is_quad = (coarse_poly->totloop == 4); - for (int corner = 0; corner < coarse_poly->totloop; corner++) { - for (int y = 0; y < resolution; y++) { - const float corner_v = y * resolution_1_inv; - for (int x = 0; x < resolution; x++) { - const float corner_u = x * resolution_1_inv; - /* Quad faces consists of a single ptex face. */ - const int ptex_face_index = is_quad ? start_ptex_face_index : - start_ptex_face_index + corner; - float grid_u, grid_v; - BKE_subdiv_ptex_face_uv_to_grid_uv(corner_u, corner_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, - corner_v, - coarse_poly_index, - corner, - final_P, - final_mask); - } - } - } -} - -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); - if (mdisps == NULL) { - /* Multires displacement has been removed before current changes were - * applies to all the levels. */ - return false; - } - GridPaintMask *grid_paint_mask = CustomData_get_layer(&coarse_mesh->ldata, CD_GRID_PAINT_MASK); - Subdiv *subdiv = subdiv_ccg->subdiv; - /* Pick maximum between multires level and displacement 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); - /* Make sure displacement grids are ready. */ - multires_reshape_ensure_grids(coarse_mesh, top_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. */ - TaskParallelSettings parallel_range_settings; - BLI_parallel_range_settings_defaults(¶llel_range_settings); - BLI_task_parallel_range( - 0, coarse_mesh->totpoly, &data, reshape_from_ccg_task, ¶llel_range_settings); - /* Update higher levels if needed. */ - multires_reshape_propagate(&propagate_data); - multires_reshape_propagate_free(&propagate_data); - return true; -} -- cgit v1.2.3