cdaf5a1083
Limited to mesh type of source, not sure it ever worked for non-meshes. While it's possible to support reshape from any object, the actual brain of operation would need to be recoded to go away from requirement of vertex indices matching in source and destination.
511 lines
17 KiB
C
511 lines
17 KiB
C
/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2018 Blender Foundation.
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* All rights reserved.
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*
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* Contributor(s): Sergey Sharybin.
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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/** \file blender/blenkernel/intern/multires_reshape.c
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* \ingroup bke
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*/
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#include "MEM_guardedalloc.h"
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#include "DNA_mesh_types.h"
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#include "DNA_meshdata_types.h"
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#include "DNA_scene_types.h"
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#include "BLI_utildefines.h"
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#include "BLI_math_vector.h"
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#include "BKE_library.h"
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#include "BKE_mesh.h"
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#include "BKE_mesh_runtime.h"
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#include "BKE_modifier.h"
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#include "BKE_multires.h"
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#include "BKE_subdiv.h"
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#include "DEG_depsgraph_query.h"
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/* TODO(sergey): De-duplicate with subdiv_displacement_multires.c. */
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/* Coordinates within grid has different convention from PTex coordinates.
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* This function converts the latter ones to former.
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*/
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BLI_INLINE void ptex_uv_to_grid_uv(const float ptex_u, const float ptex_v,
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float *r_grid_u, float *r_grid_v)
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{
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*r_grid_u = 1.0f - ptex_v;
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*r_grid_v = 1.0f - ptex_u;
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}
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/* Simplified version of mdisp_rot_face_to_crn, only handles quad and
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* works in normalized coordinates.
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*
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* NOTE: Output coordinates are in ptex coordinates.
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*/
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BLI_INLINE int rotate_quad_to_corner(const float u, const float v,
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float *r_u, float *r_v)
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{
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int corner;
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if (u <= 0.5f && v <= 0.5f) {
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corner = 0;
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*r_u = 2.0f * u;
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*r_v = 2.0f * v;
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}
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else if (u > 0.5f && v <= 0.5f) {
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corner = 1;
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*r_u = 2.0f * v;
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*r_v = 2.0f * (1.0f - u);
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}
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else if (u > 0.5f && v > 0.5f) {
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corner = 2;
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*r_u = 2.0f * (1.0f - u);
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*r_v = 2.0f * (1.0f - v);
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}
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else if (u <= 0.5f && v >= 0.5f) {
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corner = 3;
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*r_u = 2.0f * (1.0f - v);
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*r_v = 2.0f * u;
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}
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else {
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BLI_assert(!"Unexpected corner configuration");
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}
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return corner;
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}
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BLI_INLINE void construct_tangent_matrix(float tangent_matrix[3][3],
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const float dPdu[3],
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const float dPdv[3],
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const int corner)
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{
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if (corner == 0) {
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copy_v3_v3(tangent_matrix[0], dPdv);
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copy_v3_v3(tangent_matrix[1], dPdu);
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mul_v3_fl(tangent_matrix[0], -1.0f);
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mul_v3_fl(tangent_matrix[1], -1.0f);
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}
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else if (corner == 1) {
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copy_v3_v3(tangent_matrix[0], dPdu);
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copy_v3_v3(tangent_matrix[1], dPdv);
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mul_v3_fl(tangent_matrix[1], -1.0f);
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}
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else if (corner == 2) {
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copy_v3_v3(tangent_matrix[0], dPdv);
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copy_v3_v3(tangent_matrix[1], dPdu);
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}
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else if (corner == 3) {
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copy_v3_v3(tangent_matrix[0], dPdu);
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copy_v3_v3(tangent_matrix[1], dPdv);
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mul_v3_fl(tangent_matrix[0], -1.0f);
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}
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cross_v3_v3v3(tangent_matrix[2], dPdu, dPdv);
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normalize_v3(tangent_matrix[0]);
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normalize_v3(tangent_matrix[1]);
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normalize_v3(tangent_matrix[2]);
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}
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/* =============================================================================
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* Reshape internal functionality..
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*/
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typedef struct MultiresReshapeContext {
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Subdiv *subdiv;
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Object *object;
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const Mesh *coarse_mesh;
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MDisps *mdisps;
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const float (*deformed_verts)[3];
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int num_deformed_verts;
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int grid_size;
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} MultiresReshapeContext;
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static bool multires_reshape_topology_info(
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const SubdivForeachContext *foreach_context,
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const int num_vertices,
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const int UNUSED(num_edges),
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const int UNUSED(num_loops),
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const int UNUSED(num_polygons))
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{
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MultiresReshapeContext *ctx = foreach_context->user_data;
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if (num_vertices != ctx->num_deformed_verts) {
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return false;
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}
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return true;
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}
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static void multires_reshape_vertex_copy_to_next(
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MultiresReshapeContext *ctx,
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const MPoly *coarse_poly,
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const int current_corner,
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const MDisps *current_displacement_grid,
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const int current_grid_x, const int current_grid_y)
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{
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const int grid_size = ctx->grid_size;
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const int next_current_corner = (current_corner + 1) % coarse_poly->totloop;
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MDisps *next_displacement_grid = &ctx->mdisps[
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coarse_poly->loopstart + next_current_corner];
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const int next_grid_x = 0;
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const int next_grid_y = current_grid_x;
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const int current_index = current_grid_y * grid_size + current_grid_x;
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const int next_index = next_grid_y * grid_size + next_grid_x;
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float *next_displacement = next_displacement_grid->disps[next_index];
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copy_v3_v3(next_displacement,
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current_displacement_grid->disps[current_index]);
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SWAP(float, next_displacement[0], next_displacement[1]);
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next_displacement[0] = -next_displacement[0];
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}
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static void multires_reshape_vertex_copy_to_prev(
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MultiresReshapeContext *ctx,
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const MPoly *coarse_poly,
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const int current_corner,
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const MDisps *current_displacement_grid,
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const int current_grid_x, const int current_grid_y)
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{
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const int grid_size = ctx->grid_size;
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const int prev_current_corner =
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(current_corner - 1 + coarse_poly->totloop) % coarse_poly->totloop;
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MDisps *prev_displacement_grid = &ctx->mdisps[
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coarse_poly->loopstart + prev_current_corner];
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const int prev_grid_x = current_grid_y;
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const int prev_grid_y = 0;
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const int current_index = current_grid_y * grid_size + current_grid_x;
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const int prev_index = prev_grid_y * grid_size + prev_grid_x;
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float *prev_displacement = prev_displacement_grid->disps[prev_index];
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copy_v3_v3(prev_displacement,
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current_displacement_grid->disps[current_index]);
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SWAP(float, prev_displacement[0], prev_displacement[1]);
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prev_displacement[1] = -prev_displacement[1];
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}
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static void copy_boundary_displacement(
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MultiresReshapeContext *ctx,
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const MPoly *coarse_poly,
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const int corner,
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const int grid_x, const int grid_y,
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const MDisps *displacement_grid)
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{
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if (grid_x == 0 && grid_y == 0) {
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for (int i = 0; i < coarse_poly->totloop; i++) {
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const int current_face_corner =
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(corner + i) % coarse_poly->totloop;
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MDisps *current_displacement_grid = &ctx->mdisps[
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coarse_poly->loopstart + current_face_corner];
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multires_reshape_vertex_copy_to_next(
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ctx,
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coarse_poly,
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current_face_corner,
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current_displacement_grid,
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0, 0);
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}
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}
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else if (grid_x == 0) {
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multires_reshape_vertex_copy_to_prev(
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ctx,
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coarse_poly,
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corner,
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displacement_grid,
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grid_x, grid_y);
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}
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else if (grid_y == 0) {
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multires_reshape_vertex_copy_to_next(
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ctx,
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coarse_poly,
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corner,
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displacement_grid,
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grid_x, grid_y);
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}
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}
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static void multires_reshape_vertex(
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MultiresReshapeContext *ctx,
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const int ptex_face_index,
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const float u, const float v,
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const int coarse_poly_index,
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const int coarse_corner,
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const int subdiv_vertex_index)
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{
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Subdiv *subdiv = ctx->subdiv;
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const int grid_size = ctx->grid_size;
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const Mesh *coarse_mesh = ctx->coarse_mesh;
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const MPoly *coarse_mpoly = coarse_mesh->mpoly;
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const MPoly *coarse_poly = &coarse_mpoly[coarse_poly_index];
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const int loop_index = coarse_poly->loopstart + coarse_corner;
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/* Evaluate limit surface. */
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float P[3], dPdu[3], dPdv[3];
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BKE_subdiv_eval_limit_point_and_derivatives(
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subdiv, ptex_face_index, u, v, P, dPdu, dPdv);
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/* Get coordinate and corner configuration.. */
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float grid_u, grid_v;
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MDisps *displacement_grid;
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int face_corner = coarse_corner;
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int grid_corner = 0;
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if (coarse_poly->totloop == 4) {
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float corner_u, corner_v;
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face_corner = rotate_quad_to_corner(u, v, &corner_u, &corner_v);
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grid_corner = face_corner;
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displacement_grid = &ctx->mdisps[loop_index + face_corner];
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ptex_uv_to_grid_uv(corner_u, corner_v, &grid_u, &grid_v);
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}
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else {
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displacement_grid = &ctx->mdisps[loop_index];
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ptex_uv_to_grid_uv(u, v, &grid_u, &grid_v);
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}
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/* Convert object coordinate to a tangent space of displacement grid. */
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const float *final_P = ctx->deformed_verts[subdiv_vertex_index];
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float D[3];
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sub_v3_v3v3(D, final_P, P);
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float tangent_matrix[3][3];
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construct_tangent_matrix(tangent_matrix, dPdu, dPdv, grid_corner);
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float inv_tangent_matrix[3][3];
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invert_m3_m3(inv_tangent_matrix, tangent_matrix);
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float tangent_D[3];
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mul_v3_m3v3(tangent_D, inv_tangent_matrix, D);
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/* Write tangent displacement. */
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const int grid_x = (grid_u * (grid_size - 1) + 0.5f);
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const int grid_y = (grid_v * (grid_size - 1) + 0.5f);
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const int index = grid_y * grid_size + grid_x;
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copy_v3_v3(displacement_grid->disps[index], tangent_D);
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/* Copy boundary to the next/previous grids */
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copy_boundary_displacement(
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ctx, coarse_poly, face_corner, grid_x, grid_y, displacement_grid);
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}
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static void multires_reshape_vertex_inner(
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const SubdivForeachContext *foreach_context,
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void *UNUSED(tls_v),
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const int ptex_face_index,
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const float u, const float v,
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const int coarse_poly_index,
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const int coarse_corner,
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const int subdiv_vertex_index)
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{
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MultiresReshapeContext *ctx = foreach_context->user_data;
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multires_reshape_vertex(
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ctx,
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ptex_face_index, u, v,
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coarse_poly_index,
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coarse_corner,
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subdiv_vertex_index);
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}
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static void multires_reshape_vertex_every_corner(
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const struct SubdivForeachContext *foreach_context,
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void *UNUSED(tls_v),
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const int ptex_face_index,
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const float u, const float v,
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const int UNUSED(coarse_vertex_index),
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const int coarse_poly_index,
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const int coarse_corner,
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const int subdiv_vertex_index)
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{
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MultiresReshapeContext *ctx = foreach_context->user_data;
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multires_reshape_vertex(
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ctx,
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ptex_face_index, u, v,
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coarse_poly_index,
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coarse_corner,
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subdiv_vertex_index);
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}
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static void multires_reshape_vertex_every_edge(
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const struct SubdivForeachContext *foreach_context,
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void *UNUSED(tls_v),
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const int ptex_face_index,
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const float u, const float v,
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const int UNUSED(coarse_edge_index),
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const int coarse_poly_index,
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const int coarse_corner,
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const int subdiv_vertex_index)
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{
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MultiresReshapeContext *ctx = foreach_context->user_data;
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multires_reshape_vertex(
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ctx,
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ptex_face_index, u, v,
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coarse_poly_index,
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coarse_corner,
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subdiv_vertex_index);
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}
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static Subdiv *multires_subdiv_for_reshape(struct Depsgraph *depsgraph,
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/*const*/ Object *object,
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const MultiresModifierData *mmd)
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{
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Scene *scene_eval = DEG_get_evaluated_scene(depsgraph);
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Object *object_eval = DEG_get_evaluated_object(depsgraph, object);
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Mesh *deformed_mesh = mesh_get_eval_deform(
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depsgraph, scene_eval, object_eval, CD_MASK_BAREMESH);
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SubdivSettings subdiv_settings;
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BKE_multires_subdiv_settings_init(&subdiv_settings, mmd);
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Subdiv *subdiv = BKE_subdiv_new_from_mesh(&subdiv_settings, deformed_mesh);
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if (!BKE_subdiv_eval_update_from_mesh(subdiv, deformed_mesh)) {
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BKE_subdiv_free(subdiv);
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return NULL;
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}
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return subdiv;
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}
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static bool multires_reshape_from_vertcos(struct Depsgraph *depsgraph,
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Object *object,
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const MultiresModifierData *mmd,
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const float (*deformed_verts)[3],
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const int num_deformed_verts,
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const bool use_render_params)
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{
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Scene *scene_eval = DEG_get_evaluated_scene(depsgraph);
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Mesh *coarse_mesh = object->data;
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MultiresReshapeContext ctx = {
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.object = object,
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.coarse_mesh = coarse_mesh,
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.deformed_verts = deformed_verts,
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.mdisps = CustomData_get_layer(&coarse_mesh->ldata, CD_MDISPS),
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.num_deformed_verts = num_deformed_verts,
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.grid_size = (1 << (mmd->totlvl - 1)) + 1,
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};
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SubdivForeachContext foreach_context = {
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.topology_info = multires_reshape_topology_info,
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.vertex_inner = multires_reshape_vertex_inner,
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.vertex_every_edge = multires_reshape_vertex_every_edge,
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.vertex_every_corner = multires_reshape_vertex_every_corner,
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.user_data = &ctx,
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};
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/* Initialize subdivision surface. */
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ctx.subdiv = multires_subdiv_for_reshape(depsgraph, object, mmd);
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if (ctx.subdiv == NULL) {
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return false;
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}
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/* Initialize mesh rasterization settings. */
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SubdivToMeshSettings mesh_settings;
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BKE_multires_subdiv_mesh_settings_init(
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&mesh_settings, scene_eval, object, mmd, use_render_params, true);
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/* Run all the callbacks. */
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BKE_subdiv_foreach_subdiv_geometry(
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ctx.subdiv,
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&foreach_context,
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&mesh_settings,
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coarse_mesh);
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BKE_subdiv_free(ctx.subdiv);
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return true;
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}
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static void multires_reshape_init_mmd(MultiresModifierData *reshape_mmd,
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const MultiresModifierData *mmd)
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{
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/* It is possible that the current subdivision level of multires is lower
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* that it's maximum possible one (i.e., viewport is set to a lower level
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* for the performance purposes). But even then, we want all the multires
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* levels to be reshaped. Most accurate way to do so is to ignore all
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* simplifications and calculate deformation modifier for the highest
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* possible multires level.
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* Alternative would be propagate displacement from current level to a
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* higher ones, but that is likely to cause artifacts.
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*/
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*reshape_mmd = *mmd;
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reshape_mmd->lvl = reshape_mmd->totlvl;
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}
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/* =============================================================================
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* Public entry points..
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*/
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/* Returns truth on success, false otherwise.
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*
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* This function might fail in cases like source and destination not having
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* matched amount of vertices.
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*/
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bool multiresModifier_reshape(
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struct Depsgraph *depsgraph,
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MultiresModifierData *mmd,
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Object *dst,
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Object *src)
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{
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/* Would be cool to support this eventually, but it is very tricky to match
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* vertices order even for meshes, when mixing meshes and other objects it's
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* even more tricky.
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*/
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if (src->type != OB_MESH) {
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return false;
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}
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MultiresModifierData highest_mmd;
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multires_reshape_init_mmd(&highest_mmd, mmd);
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/* Get evaluated vertices locations to reshape to. */
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Scene *scene_eval = DEG_get_evaluated_scene(depsgraph);
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Object *src_eval = DEG_get_evaluated_object(depsgraph, src);
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Mesh *src_mesh_eval = mesh_get_eval_final(
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depsgraph, scene_eval, src_eval, CD_MASK_BAREMESH);
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int num_deformed_verts;
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float (*deformed_verts)[3] = BKE_mesh_vertexCos_get(
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src_mesh_eval, &num_deformed_verts);
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bool result = multires_reshape_from_vertcos(
|
|
depsgraph,
|
|
dst,
|
|
&highest_mmd,
|
|
deformed_verts,
|
|
num_deformed_verts,
|
|
false);
|
|
MEM_freeN(deformed_verts);
|
|
return result;
|
|
}
|
|
|
|
bool multiresModifier_reshapeFromDeformModifier(
|
|
struct Depsgraph *depsgraph,
|
|
MultiresModifierData *mmd,
|
|
Object *object,
|
|
ModifierData *md)
|
|
{
|
|
MultiresModifierData highest_mmd;
|
|
multires_reshape_init_mmd(&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 = get_multires_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};
|
|
modifier_deformVerts_ensure_normals(
|
|
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;
|
|
}
|