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Diffstat (limited to 'source/blender/blenkernel/intern/mesh_legacy_convert.cc')
| -rw-r--r-- | source/blender/blenkernel/intern/mesh_legacy_convert.cc | 1043 |
1 files changed, 1043 insertions, 0 deletions
diff --git a/source/blender/blenkernel/intern/mesh_legacy_convert.cc b/source/blender/blenkernel/intern/mesh_legacy_convert.cc new file mode 100644 index 00000000000..2f67e303095 --- /dev/null +++ b/source/blender/blenkernel/intern/mesh_legacy_convert.cc @@ -0,0 +1,1043 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later + * Copyright 2001-2002 NaN Holding BV. All rights reserved. */ + +/** \file + * \ingroup bke + * + * Functions to convert mesh data to and from legacy formats like #MFace. + */ + +#define DNA_DEPRECATED_ALLOW + +#include "MEM_guardedalloc.h" + +#include "DNA_mesh_types.h" +#include "DNA_meshdata_types.h" + +#include "BLI_edgehash.h" +#include "BLI_math.h" +#include "BLI_memarena.h" +#include "BLI_polyfill_2d.h" +#include "BLI_task.hh" +#include "BLI_utildefines.h" + +#include "BKE_attribute.hh" +#include "BKE_customdata.h" +#include "BKE_global.h" +#include "BKE_mesh.h" +#include "BKE_mesh_legacy_convert.h" +#include "BKE_multires.h" + +/* -------------------------------------------------------------------- */ +/** \name NGon Tessellation (NGon to MFace Conversion) + * \{ */ + +static void bm_corners_to_loops_ex(ID *id, + CustomData *fdata, + CustomData *ldata, + MFace *mface, + int totloop, + int findex, + int loopstart, + int numTex, + int numCol) +{ + MFace *mf = mface + findex; + + for (int i = 0; i < numTex; i++) { + const MTFace *texface = (const MTFace *)CustomData_get_n(fdata, CD_MTFACE, findex, i); + + MLoopUV *mloopuv = (MLoopUV *)CustomData_get_n(ldata, CD_MLOOPUV, loopstart, i); + copy_v2_v2(mloopuv->uv, texface->uv[0]); + mloopuv++; + copy_v2_v2(mloopuv->uv, texface->uv[1]); + mloopuv++; + copy_v2_v2(mloopuv->uv, texface->uv[2]); + mloopuv++; + + if (mf->v4) { + copy_v2_v2(mloopuv->uv, texface->uv[3]); + mloopuv++; + } + } + + for (int i = 0; i < numCol; i++) { + MLoopCol *mloopcol = (MLoopCol *)CustomData_get_n(ldata, CD_PROP_BYTE_COLOR, loopstart, i); + const MCol *mcol = (const MCol *)CustomData_get_n(fdata, CD_MCOL, findex, i); + + MESH_MLOOPCOL_FROM_MCOL(mloopcol, &mcol[0]); + mloopcol++; + MESH_MLOOPCOL_FROM_MCOL(mloopcol, &mcol[1]); + mloopcol++; + MESH_MLOOPCOL_FROM_MCOL(mloopcol, &mcol[2]); + mloopcol++; + if (mf->v4) { + MESH_MLOOPCOL_FROM_MCOL(mloopcol, &mcol[3]); + mloopcol++; + } + } + + if (CustomData_has_layer(fdata, CD_TESSLOOPNORMAL)) { + float(*lnors)[3] = (float(*)[3])CustomData_get(ldata, loopstart, CD_NORMAL); + const short(*tlnors)[3] = (short(*)[3])CustomData_get(fdata, findex, CD_TESSLOOPNORMAL); + const int max = mf->v4 ? 4 : 3; + + for (int i = 0; i < max; i++, lnors++, tlnors++) { + normal_short_to_float_v3(*lnors, *tlnors); + } + } + + if (CustomData_has_layer(fdata, CD_MDISPS)) { + MDisps *ld = (MDisps *)CustomData_get(ldata, loopstart, CD_MDISPS); + const MDisps *fd = (const MDisps *)CustomData_get(fdata, findex, CD_MDISPS); + const float(*disps)[3] = fd->disps; + int tot = mf->v4 ? 4 : 3; + int corners; + + if (CustomData_external_test(fdata, CD_MDISPS)) { + if (id && fdata->external) { + CustomData_external_add(ldata, id, CD_MDISPS, totloop, fdata->external->filepath); + } + } + + corners = multires_mdisp_corners(fd); + + if (corners == 0) { + /* Empty #MDisp layers appear in at least one of the `sintel.blend` files. + * Not sure why this happens, but it seems fine to just ignore them here. + * If `corners == 0` for a non-empty layer though, something went wrong. */ + BLI_assert(fd->totdisp == 0); + } + else { + const int side = (int)sqrtf((float)(fd->totdisp / corners)); + const int side_sq = side * side; + + for (int i = 0; i < tot; i++, disps += side_sq, ld++) { + ld->totdisp = side_sq; + ld->level = (int)(logf((float)side - 1.0f) / (float)M_LN2) + 1; + + if (ld->disps) { + MEM_freeN(ld->disps); + } + + ld->disps = (float(*)[3])MEM_malloc_arrayN( + (size_t)side_sq, sizeof(float[3]), "converted loop mdisps"); + if (fd->disps) { + memcpy(ld->disps, disps, (size_t)side_sq * sizeof(float[3])); + } + else { + memset(ld->disps, 0, (size_t)side_sq * sizeof(float[3])); + } + } + } + } +} + +static void CustomData_to_bmeshpoly(CustomData *fdata, CustomData *ldata, int totloop) +{ + for (int i = 0; i < fdata->totlayer; i++) { + if (fdata->layers[i].type == CD_MTFACE) { + CustomData_add_layer_named( + ldata, CD_MLOOPUV, CD_SET_DEFAULT, nullptr, totloop, fdata->layers[i].name); + } + else if (fdata->layers[i].type == CD_MCOL) { + CustomData_add_layer_named( + ldata, CD_PROP_BYTE_COLOR, CD_SET_DEFAULT, nullptr, totloop, fdata->layers[i].name); + } + else if (fdata->layers[i].type == CD_MDISPS) { + CustomData_add_layer_named( + ldata, CD_MDISPS, CD_SET_DEFAULT, nullptr, totloop, fdata->layers[i].name); + } + else if (fdata->layers[i].type == CD_TESSLOOPNORMAL) { + CustomData_add_layer_named( + ldata, CD_NORMAL, CD_SET_DEFAULT, nullptr, totloop, fdata->layers[i].name); + } + } +} + +static void convert_mfaces_to_mpolys(ID *id, + CustomData *fdata, + CustomData *ldata, + CustomData *pdata, + int totedge_i, + int totface_i, + int totloop_i, + int totpoly_i, + MEdge *medge, + MFace *mface, + int *r_totloop, + int *r_totpoly) +{ + MFace *mf; + MLoop *ml, *mloop; + MPoly *mp, *mpoly; + MEdge *me; + EdgeHash *eh; + int numTex, numCol; + int i, j, totloop, totpoly, *polyindex; + + /* old flag, clear to allow for reuse */ +#define ME_FGON (1 << 3) + + /* just in case some of these layers are filled in (can happen with python created meshes) */ + CustomData_free(ldata, totloop_i); + CustomData_free(pdata, totpoly_i); + + totpoly = totface_i; + mpoly = (MPoly *)CustomData_add_layer(pdata, CD_MPOLY, CD_SET_DEFAULT, nullptr, totpoly); + int *material_indices = static_cast<int *>( + CustomData_get_layer_named(pdata, CD_PROP_INT32, "material_index")); + if (material_indices == nullptr) { + material_indices = static_cast<int *>(CustomData_add_layer_named( + pdata, CD_PROP_INT32, CD_SET_DEFAULT, nullptr, totpoly, "material_index")); + } + + numTex = CustomData_number_of_layers(fdata, CD_MTFACE); + numCol = CustomData_number_of_layers(fdata, CD_MCOL); + + totloop = 0; + mf = mface; + for (i = 0; i < totface_i; i++, mf++) { + totloop += mf->v4 ? 4 : 3; + } + + mloop = (MLoop *)CustomData_add_layer(ldata, CD_MLOOP, CD_SET_DEFAULT, nullptr, totloop); + + CustomData_to_bmeshpoly(fdata, ldata, totloop); + + if (id) { + /* ensure external data is transferred */ + /* TODO(sergey): Use multiresModifier_ensure_external_read(). */ + CustomData_external_read(fdata, id, CD_MASK_MDISPS, totface_i); + } + + eh = BLI_edgehash_new_ex(__func__, (uint)totedge_i); + + /* build edge hash */ + me = medge; + for (i = 0; i < totedge_i; i++, me++) { + BLI_edgehash_insert(eh, me->v1, me->v2, POINTER_FROM_UINT(i)); + + /* unrelated but avoid having the FGON flag enabled, + * so we can reuse it later for something else */ + me->flag &= ~ME_FGON; + } + + polyindex = (int *)CustomData_get_layer(fdata, CD_ORIGINDEX); + + j = 0; /* current loop index */ + ml = mloop; + mf = mface; + mp = mpoly; + for (i = 0; i < totface_i; i++, mf++, mp++) { + mp->loopstart = j; + + mp->totloop = mf->v4 ? 4 : 3; + + material_indices[i] = mf->mat_nr; + mp->flag = mf->flag; + +#define ML(v1, v2) \ + { \ + ml->v = mf->v1; \ + ml->e = POINTER_AS_UINT(BLI_edgehash_lookup(eh, mf->v1, mf->v2)); \ + ml++; \ + j++; \ + } \ + (void)0 + + ML(v1, v2); + ML(v2, v3); + if (mf->v4) { + ML(v3, v4); + ML(v4, v1); + } + else { + ML(v3, v1); + } + +#undef ML + + bm_corners_to_loops_ex(id, fdata, ldata, mface, totloop, i, mp->loopstart, numTex, numCol); + + if (polyindex) { + *polyindex = i; + polyindex++; + } + } + + /* NOTE: we don't convert NGons at all, these are not even real ngons, + * they have their own UV's, colors etc - its more an editing feature. */ + + BLI_edgehash_free(eh, nullptr); + + *r_totpoly = totpoly; + *r_totloop = totloop; + +#undef ME_FGON +} + +static void mesh_ensure_tessellation_customdata(Mesh *me) +{ + if (UNLIKELY((me->totface != 0) && (me->totpoly == 0))) { + /* Pass, otherwise this function clears 'mface' before + * versioning 'mface -> mpoly' code kicks in T30583. + * + * Callers could also check but safer to do here - campbell */ + } + else { + const int tottex_original = CustomData_number_of_layers(&me->ldata, CD_MLOOPUV); + const int totcol_original = CustomData_number_of_layers(&me->ldata, CD_PROP_BYTE_COLOR); + + const int tottex_tessface = CustomData_number_of_layers(&me->fdata, CD_MTFACE); + const int totcol_tessface = CustomData_number_of_layers(&me->fdata, CD_MCOL); + + if (tottex_tessface != tottex_original || totcol_tessface != totcol_original) { + BKE_mesh_tessface_clear(me); + + BKE_mesh_add_mface_layers(&me->fdata, &me->ldata, me->totface); + + /* TODO: add some `--debug-mesh` option. */ + if (G.debug & G_DEBUG) { + /* NOTE(campbell): this warning may be un-called for if we are initializing the mesh for + * the first time from #BMesh, rather than giving a warning about this we could be smarter + * and check if there was any data to begin with, for now just print the warning with + * some info to help troubleshoot what's going on. */ + printf( + "%s: warning! Tessellation uvs or vcol data got out of sync, " + "had to reset!\n CD_MTFACE: %d != CD_MLOOPUV: %d || CD_MCOL: %d != " + "CD_PROP_BYTE_COLOR: " + "%d\n", + __func__, + tottex_tessface, + tottex_original, + totcol_tessface, + totcol_original); + } + } + } +} + +void BKE_mesh_convert_mfaces_to_mpolys(Mesh *mesh) +{ + convert_mfaces_to_mpolys(&mesh->id, + &mesh->fdata, + &mesh->ldata, + &mesh->pdata, + mesh->totedge, + mesh->totface, + mesh->totloop, + mesh->totpoly, + mesh->edges_for_write().data(), + (MFace *)CustomData_get_layer(&mesh->fdata, CD_MFACE), + &mesh->totloop, + &mesh->totpoly); + + mesh_ensure_tessellation_customdata(mesh); +} + +/** + * Update active indices for active/render/clone/stencil custom data layers + * based on indices from fdata layers + * used when creating pdata and ldata for pre-bmesh + * meshes and needed to preserve active/render/clone/stencil flags set in pre-bmesh files. + */ +static void CustomData_bmesh_do_versions_update_active_layers(CustomData *fdata, CustomData *ldata) +{ + int act; + + if (CustomData_has_layer(fdata, CD_MTFACE)) { + act = CustomData_get_active_layer(fdata, CD_MTFACE); + CustomData_set_layer_active(ldata, CD_MLOOPUV, act); + + act = CustomData_get_render_layer(fdata, CD_MTFACE); + CustomData_set_layer_render(ldata, CD_MLOOPUV, act); + + act = CustomData_get_clone_layer(fdata, CD_MTFACE); + CustomData_set_layer_clone(ldata, CD_MLOOPUV, act); + + act = CustomData_get_stencil_layer(fdata, CD_MTFACE); + CustomData_set_layer_stencil(ldata, CD_MLOOPUV, act); + } + + if (CustomData_has_layer(fdata, CD_MCOL)) { + act = CustomData_get_active_layer(fdata, CD_MCOL); + CustomData_set_layer_active(ldata, CD_PROP_BYTE_COLOR, act); + + act = CustomData_get_render_layer(fdata, CD_MCOL); + CustomData_set_layer_render(ldata, CD_PROP_BYTE_COLOR, act); + + act = CustomData_get_clone_layer(fdata, CD_MCOL); + CustomData_set_layer_clone(ldata, CD_PROP_BYTE_COLOR, act); + + act = CustomData_get_stencil_layer(fdata, CD_MCOL); + CustomData_set_layer_stencil(ldata, CD_PROP_BYTE_COLOR, act); + } +} + +void BKE_mesh_do_versions_convert_mfaces_to_mpolys(Mesh *mesh) +{ + convert_mfaces_to_mpolys(&mesh->id, + &mesh->fdata, + &mesh->ldata, + &mesh->pdata, + mesh->totedge, + mesh->totface, + mesh->totloop, + mesh->totpoly, + mesh->edges_for_write().data(), + (MFace *)CustomData_get_layer(&mesh->fdata, CD_MFACE), + &mesh->totloop, + &mesh->totpoly); + + CustomData_bmesh_do_versions_update_active_layers(&mesh->fdata, &mesh->ldata); + + mesh_ensure_tessellation_customdata(mesh); +} + +/** \} */ + +/* -------------------------------------------------------------------- */ +/** \name MFace Tessellation + * + * #MFace is a legacy data-structure that should be avoided, use #MLoopTri instead. + * \{ */ + +/** + * Convert all CD layers from loop/poly to tessface data. + * + * \param loopindices: is an array of an int[4] per tessface, + * mapping tessface's verts to loops indices. + * + * \note when mface is not null, mface[face_index].v4 + * is used to test quads, else, loopindices[face_index][3] is used. + */ +static void mesh_loops_to_tessdata(CustomData *fdata, + CustomData *ldata, + MFace *mface, + const int *polyindices, + uint (*loopindices)[4], + const int num_faces) +{ + /* NOTE(mont29): performances are sub-optimal when we get a null #MFace, + * we could be ~25% quicker with dedicated code. + * The issue is, unless having two different functions with nearly the same code, + * there's not much ways to solve this. Better IMHO to live with it for now (sigh). */ + const int numUV = CustomData_number_of_layers(ldata, CD_MLOOPUV); + const int numCol = CustomData_number_of_layers(ldata, CD_PROP_BYTE_COLOR); + const bool hasPCol = CustomData_has_layer(ldata, CD_PREVIEW_MLOOPCOL); + const bool hasOrigSpace = CustomData_has_layer(ldata, CD_ORIGSPACE_MLOOP); + const bool hasLoopNormal = CustomData_has_layer(ldata, CD_NORMAL); + const bool hasLoopTangent = CustomData_has_layer(ldata, CD_TANGENT); + int findex, i, j; + const int *pidx; + uint(*lidx)[4]; + + for (i = 0; i < numUV; i++) { + MTFace *texface = (MTFace *)CustomData_get_layer_n(fdata, CD_MTFACE, i); + const MLoopUV *mloopuv = (const MLoopUV *)CustomData_get_layer_n(ldata, CD_MLOOPUV, i); + + for (findex = 0, pidx = polyindices, lidx = loopindices; findex < num_faces; + pidx++, lidx++, findex++, texface++) { + for (j = (mface ? mface[findex].v4 : (*lidx)[3]) ? 4 : 3; j--;) { + copy_v2_v2(texface->uv[j], mloopuv[(*lidx)[j]].uv); + } + } + } + + for (i = 0; i < numCol; i++) { + MCol(*mcol)[4] = (MCol(*)[4])CustomData_get_layer_n(fdata, CD_MCOL, i); + const MLoopCol *mloopcol = (const MLoopCol *)CustomData_get_layer_n( + ldata, CD_PROP_BYTE_COLOR, i); + + for (findex = 0, lidx = loopindices; findex < num_faces; lidx++, findex++, mcol++) { + for (j = (mface ? mface[findex].v4 : (*lidx)[3]) ? 4 : 3; j--;) { + MESH_MLOOPCOL_TO_MCOL(&mloopcol[(*lidx)[j]], &(*mcol)[j]); + } + } + } + + if (hasPCol) { + MCol(*mcol)[4] = (MCol(*)[4])CustomData_get_layer(fdata, CD_PREVIEW_MCOL); + const MLoopCol *mloopcol = (const MLoopCol *)CustomData_get_layer(ldata, CD_PREVIEW_MLOOPCOL); + + for (findex = 0, lidx = loopindices; findex < num_faces; lidx++, findex++, mcol++) { + for (j = (mface ? mface[findex].v4 : (*lidx)[3]) ? 4 : 3; j--;) { + MESH_MLOOPCOL_TO_MCOL(&mloopcol[(*lidx)[j]], &(*mcol)[j]); + } + } + } + + if (hasOrigSpace) { + OrigSpaceFace *of = (OrigSpaceFace *)CustomData_get_layer(fdata, CD_ORIGSPACE); + const OrigSpaceLoop *lof = (const OrigSpaceLoop *)CustomData_get_layer(ldata, + CD_ORIGSPACE_MLOOP); + + for (findex = 0, lidx = loopindices; findex < num_faces; lidx++, findex++, of++) { + for (j = (mface ? mface[findex].v4 : (*lidx)[3]) ? 4 : 3; j--;) { + copy_v2_v2(of->uv[j], lof[(*lidx)[j]].uv); + } + } + } + + if (hasLoopNormal) { + short(*fnors)[4][3] = (short(*)[4][3])CustomData_get_layer(fdata, CD_TESSLOOPNORMAL); + const float(*lnors)[3] = (const float(*)[3])CustomData_get_layer(ldata, CD_NORMAL); + + for (findex = 0, lidx = loopindices; findex < num_faces; lidx++, findex++, fnors++) { + for (j = (mface ? mface[findex].v4 : (*lidx)[3]) ? 4 : 3; j--;) { + normal_float_to_short_v3((*fnors)[j], lnors[(*lidx)[j]]); + } + } + } + + if (hasLoopTangent) { + /* Need to do for all UV maps at some point. */ + float(*ftangents)[4] = (float(*)[4])CustomData_get_layer(fdata, CD_TANGENT); + const float(*ltangents)[4] = (const float(*)[4])CustomData_get_layer(ldata, CD_TANGENT); + + for (findex = 0, pidx = polyindices, lidx = loopindices; findex < num_faces; + pidx++, lidx++, findex++) { + int nverts = (mface ? mface[findex].v4 : (*lidx)[3]) ? 4 : 3; + for (j = nverts; j--;) { + copy_v4_v4(ftangents[findex * 4 + j], ltangents[(*lidx)[j]]); + } + } + } +} + +int BKE_mesh_mface_index_validate(MFace *mface, CustomData *fdata, int mfindex, int nr) +{ + /* first test if the face is legal */ + if ((mface->v3 || nr == 4) && mface->v3 == mface->v4) { + mface->v4 = 0; + nr--; + } + if ((mface->v2 || mface->v4) && mface->v2 == mface->v3) { + mface->v3 = mface->v4; + mface->v4 = 0; + nr--; + } + if (mface->v1 == mface->v2) { + mface->v2 = mface->v3; + mface->v3 = mface->v4; + mface->v4 = 0; + nr--; + } + + /* Check corrupt cases, bow-tie geometry, + * can't handle these because edge data won't exist so just return 0. */ + if (nr == 3) { + if ( + /* real edges */ + mface->v1 == mface->v2 || mface->v2 == mface->v3 || mface->v3 == mface->v1) { + return 0; + } + } + else if (nr == 4) { + if ( + /* real edges */ + mface->v1 == mface->v2 || mface->v2 == mface->v3 || mface->v3 == mface->v4 || + mface->v4 == mface->v1 || + /* across the face */ + mface->v1 == mface->v3 || mface->v2 == mface->v4) { + return 0; + } + } + + /* prevent a zero at wrong index location */ + if (nr == 3) { + if (mface->v3 == 0) { + static int corner_indices[4] = {1, 2, 0, 3}; + + SWAP(uint, mface->v1, mface->v2); + SWAP(uint, mface->v2, mface->v3); + + if (fdata) { + CustomData_swap_corners(fdata, mfindex, corner_indices); + } + } + } + else if (nr == 4) { + if (mface->v3 == 0 || mface->v4 == 0) { + static int corner_indices[4] = {2, 3, 0, 1}; + + SWAP(uint, mface->v1, mface->v3); + SWAP(uint, mface->v2, mface->v4); + + if (fdata) { + CustomData_swap_corners(fdata, mfindex, corner_indices); + } + } + } + + return nr; +} + +static int mesh_tessface_calc(CustomData *fdata, + CustomData *ldata, + CustomData *pdata, + MVert *mvert, + int totface, + int totloop, + int totpoly) +{ +#define USE_TESSFACE_SPEEDUP +#define USE_TESSFACE_QUADS + +/* We abuse #MFace.edcode to tag quad faces. See below for details. */ +#define TESSFACE_IS_QUAD 1 + + const int looptri_num = poly_to_tri_count(totpoly, totloop); + + const MPoly *mp, *mpoly; + const MLoop *ml, *mloop; + MFace *mface, *mf; + MemArena *arena = nullptr; + int *mface_to_poly_map; + uint(*lindices)[4]; + int poly_index, mface_index; + uint j; + + mpoly = (const MPoly *)CustomData_get_layer(pdata, CD_MPOLY); + mloop = (const MLoop *)CustomData_get_layer(ldata, CD_MLOOP); + const int *material_indices = static_cast<const int *>( + CustomData_get_layer_named(pdata, CD_PROP_INT32, "material_index")); + + /* Allocate the length of `totfaces`, avoid many small reallocation's, + * if all faces are triangles it will be correct, `quads == 2x` allocations. */ + /* Take care since memory is _not_ zeroed so be sure to initialize each field. */ + mface_to_poly_map = (int *)MEM_malloc_arrayN( + (size_t)looptri_num, sizeof(*mface_to_poly_map), __func__); + mface = (MFace *)MEM_malloc_arrayN((size_t)looptri_num, sizeof(*mface), __func__); + lindices = (uint(*)[4])MEM_malloc_arrayN((size_t)looptri_num, sizeof(*lindices), __func__); + + mface_index = 0; + mp = mpoly; + for (poly_index = 0; poly_index < totpoly; poly_index++, mp++) { + const uint mp_loopstart = (uint)mp->loopstart; + const uint mp_totloop = (uint)mp->totloop; + uint l1, l2, l3, l4; + uint *lidx; + if (mp_totloop < 3) { + /* Do nothing. */ + } + +#ifdef USE_TESSFACE_SPEEDUP + +# define ML_TO_MF(i1, i2, i3) \ + mface_to_poly_map[mface_index] = poly_index; \ + mf = &mface[mface_index]; \ + lidx = lindices[mface_index]; \ + /* Set loop indices, transformed to vert indices later. */ \ + l1 = mp_loopstart + i1; \ + l2 = mp_loopstart + i2; \ + l3 = mp_loopstart + i3; \ + mf->v1 = mloop[l1].v; \ + mf->v2 = mloop[l2].v; \ + mf->v3 = mloop[l3].v; \ + mf->v4 = 0; \ + lidx[0] = l1; \ + lidx[1] = l2; \ + lidx[2] = l3; \ + lidx[3] = 0; \ + mf->mat_nr = material_indices ? material_indices[poly_index] : 0; \ + mf->flag = mp->flag; \ + mf->edcode = 0; \ + (void)0 + +/* ALMOST IDENTICAL TO DEFINE ABOVE (see EXCEPTION) */ +# define ML_TO_MF_QUAD() \ + mface_to_poly_map[mface_index] = poly_index; \ + mf = &mface[mface_index]; \ + lidx = lindices[mface_index]; \ + /* Set loop indices, transformed to vert indices later. */ \ + l1 = mp_loopstart + 0; /* EXCEPTION */ \ + l2 = mp_loopstart + 1; /* EXCEPTION */ \ + l3 = mp_loopstart + 2; /* EXCEPTION */ \ + l4 = mp_loopstart + 3; /* EXCEPTION */ \ + mf->v1 = mloop[l1].v; \ + mf->v2 = mloop[l2].v; \ + mf->v3 = mloop[l3].v; \ + mf->v4 = mloop[l4].v; \ + lidx[0] = l1; \ + lidx[1] = l2; \ + lidx[2] = l3; \ + lidx[3] = l4; \ + mf->mat_nr = material_indices ? material_indices[poly_index] : 0; \ + mf->flag = mp->flag; \ + mf->edcode = TESSFACE_IS_QUAD; \ + (void)0 + + else if (mp_totloop == 3) { + ML_TO_MF(0, 1, 2); + mface_index++; + } + else if (mp_totloop == 4) { +# ifdef USE_TESSFACE_QUADS + ML_TO_MF_QUAD(); + mface_index++; +# else + ML_TO_MF(0, 1, 2); + mface_index++; + ML_TO_MF(0, 2, 3); + mface_index++; +# endif + } +#endif /* USE_TESSFACE_SPEEDUP */ + else { + const float *co_curr, *co_prev; + + float normal[3]; + + float axis_mat[3][3]; + float(*projverts)[2]; + uint(*tris)[3]; + + const uint totfilltri = mp_totloop - 2; + + if (UNLIKELY(arena == nullptr)) { + arena = BLI_memarena_new(BLI_MEMARENA_STD_BUFSIZE, __func__); + } + + tris = (uint(*)[3])BLI_memarena_alloc(arena, sizeof(*tris) * (size_t)totfilltri); + projverts = (float(*)[2])BLI_memarena_alloc(arena, sizeof(*projverts) * (size_t)mp_totloop); + + zero_v3(normal); + + /* Calculate the normal, flipped: to get a positive 2D cross product. */ + ml = mloop + mp_loopstart; + co_prev = mvert[ml[mp_totloop - 1].v].co; + for (j = 0; j < mp_totloop; j++, ml++) { + co_curr = mvert[ml->v].co; + add_newell_cross_v3_v3v3(normal, co_prev, co_curr); + co_prev = co_curr; + } + if (UNLIKELY(normalize_v3(normal) == 0.0f)) { + normal[2] = 1.0f; + } + + /* Project verts to 2D. */ + axis_dominant_v3_to_m3_negate(axis_mat, normal); + + ml = mloop + mp_loopstart; + for (j = 0; j < mp_totloop; j++, ml++) { + mul_v2_m3v3(projverts[j], axis_mat, mvert[ml->v].co); + } + + BLI_polyfill_calc_arena(projverts, mp_totloop, 1, tris, arena); + + /* Apply fill. */ + for (j = 0; j < totfilltri; j++) { + uint *tri = tris[j]; + lidx = lindices[mface_index]; + + mface_to_poly_map[mface_index] = poly_index; + mf = &mface[mface_index]; + + /* Set loop indices, transformed to vert indices later. */ + l1 = mp_loopstart + tri[0]; + l2 = mp_loopstart + tri[1]; + l3 = mp_loopstart + tri[2]; + + mf->v1 = mloop[l1].v; + mf->v2 = mloop[l2].v; + mf->v3 = mloop[l3].v; + mf->v4 = 0; + + lidx[0] = l1; + lidx[1] = l2; + lidx[2] = l3; + lidx[3] = 0; + + mf->mat_nr = material_indices ? material_indices[poly_index] : 0; + mf->flag = mp->flag; + mf->edcode = 0; + + mface_index++; + } + + BLI_memarena_clear(arena); + } + } + + if (arena) { + BLI_memarena_free(arena); + arena = nullptr; + } + + CustomData_free(fdata, totface); + totface = mface_index; + + BLI_assert(totface <= looptri_num); + + /* Not essential but without this we store over-allocated memory in the #CustomData layers. */ + if (LIKELY(looptri_num != totface)) { + mface = (MFace *)MEM_reallocN(mface, sizeof(*mface) * (size_t)totface); + mface_to_poly_map = (int *)MEM_reallocN(mface_to_poly_map, + sizeof(*mface_to_poly_map) * (size_t)totface); + } + + CustomData_add_layer(fdata, CD_MFACE, CD_ASSIGN, mface, totface); + + /* #CD_ORIGINDEX will contain an array of indices from tessellation-faces to the polygons + * they are directly tessellated from. */ + CustomData_add_layer(fdata, CD_ORIGINDEX, CD_ASSIGN, mface_to_poly_map, totface); + BKE_mesh_add_mface_layers(fdata, ldata, totface); + + /* NOTE: quad detection issue - fourth vertidx vs fourth loopidx: + * Polygons take care of their loops ordering, hence not of their vertices ordering. + * Currently, our tfaces' fourth vertex index might be 0 even for a quad. + * However, we know our fourth loop index is never 0 for quads + * (because they are sorted for polygons, and our quads are still mere copies of their polygons). + * So we pass nullptr as MFace pointer, and #mesh_loops_to_tessdata + * will use the fourth loop index as quad test. */ + mesh_loops_to_tessdata(fdata, ldata, nullptr, mface_to_poly_map, lindices, totface); + + /* NOTE: quad detection issue - fourth vertidx vs fourth loopidx: + * ...However, most TFace code uses 'MFace->v4 == 0' test to check whether it is a tri or quad. + * BKE_mesh_mface_index_validate() will check this and rotate the tessellated face if needed. + */ +#ifdef USE_TESSFACE_QUADS + mf = mface; + for (mface_index = 0; mface_index < totface; mface_index++, mf++) { + if (mf->edcode == TESSFACE_IS_QUAD) { + BKE_mesh_mface_index_validate(mf, fdata, mface_index, 4); + mf->edcode = 0; + } + } +#endif + + MEM_freeN(lindices); + + return totface; + +#undef USE_TESSFACE_SPEEDUP +#undef USE_TESSFACE_QUADS + +#undef ML_TO_MF +#undef ML_TO_MF_QUAD +} + +void BKE_mesh_tessface_calc(Mesh *mesh) +{ + mesh->totface = mesh_tessface_calc(&mesh->fdata, + &mesh->ldata, + &mesh->pdata, + BKE_mesh_verts_for_write(mesh), + mesh->totface, + mesh->totloop, + mesh->totpoly); + + mesh_ensure_tessellation_customdata(mesh); +} + +void BKE_mesh_tessface_ensure(struct Mesh *mesh) +{ + if (mesh->totpoly && mesh->totface == 0) { + BKE_mesh_tessface_calc(mesh); + } +} + +#ifndef NDEBUG +/** + * Debug check, used to assert when we expect layers to be in/out of sync. + * + * \param fallback: Use when there are no layers to handle, + * since callers may expect success or failure. + */ +static bool check_matching_legacy_layer_counts(CustomData *fdata, CustomData *ldata, bool fallback) +{ + int a_num = 0, b_num = 0; +# define LAYER_CMP(l_a, t_a, l_b, t_b) \ + ((a_num += CustomData_number_of_layers(l_a, t_a)) == \ + (b_num += CustomData_number_of_layers(l_b, t_b))) + + if (!LAYER_CMP(ldata, CD_MLOOPUV, fdata, CD_MTFACE)) { + return false; + } + if (!LAYER_CMP(ldata, CD_PROP_BYTE_COLOR, fdata, CD_MCOL)) { + return false; + } + if (!LAYER_CMP(ldata, CD_PREVIEW_MLOOPCOL, fdata, CD_PREVIEW_MCOL)) { + return false; + } + if (!LAYER_CMP(ldata, CD_ORIGSPACE_MLOOP, fdata, CD_ORIGSPACE)) { + return false; + } + if (!LAYER_CMP(ldata, CD_NORMAL, fdata, CD_TESSLOOPNORMAL)) { + return false; + } + if (!LAYER_CMP(ldata, CD_TANGENT, fdata, CD_TANGENT)) { + return false; + } + +# undef LAYER_CMP + + /* if no layers are on either CustomData's, + * then there was nothing to do... */ + return a_num ? true : fallback; +} +#endif + +void BKE_mesh_add_mface_layers(CustomData *fdata, CustomData *ldata, int total) +{ + /* avoid accumulating extra layers */ + BLI_assert(!check_matching_legacy_layer_counts(fdata, ldata, false)); + + for (int i = 0; i < ldata->totlayer; i++) { + if (ldata->layers[i].type == CD_MLOOPUV) { + CustomData_add_layer_named( + fdata, CD_MTFACE, CD_SET_DEFAULT, nullptr, total, ldata->layers[i].name); + } + if (ldata->layers[i].type == CD_PROP_BYTE_COLOR) { + CustomData_add_layer_named( + fdata, CD_MCOL, CD_SET_DEFAULT, nullptr, total, ldata->layers[i].name); + } + else if (ldata->layers[i].type == CD_PREVIEW_MLOOPCOL) { + CustomData_add_layer_named( + fdata, CD_PREVIEW_MCOL, CD_SET_DEFAULT, nullptr, total, ldata->layers[i].name); + } + else if (ldata->layers[i].type == CD_ORIGSPACE_MLOOP) { + CustomData_add_layer_named( + fdata, CD_ORIGSPACE, CD_SET_DEFAULT, nullptr, total, ldata->layers[i].name); + } + else if (ldata->layers[i].type == CD_NORMAL) { + CustomData_add_layer_named( + fdata, CD_TESSLOOPNORMAL, CD_SET_DEFAULT, nullptr, total, ldata->layers[i].name); + } + else if (ldata->layers[i].type == CD_TANGENT) { + CustomData_add_layer_named( + fdata, CD_TANGENT, CD_SET_DEFAULT, nullptr, total, ldata->layers[i].name); + } + } + + CustomData_bmesh_update_active_layers(fdata, ldata); +} + +/** \} */ + +/* -------------------------------------------------------------------- */ +/** \name Hide Attribute and Legacy Flag Conversion + * \{ */ + +void BKE_mesh_legacy_convert_hide_layers_to_flags(Mesh *mesh) +{ + using namespace blender; + using namespace blender::bke; + const AttributeAccessor attributes = mesh->attributes(); + + MutableSpan<MVert> verts = mesh->verts_for_write(); + const VArray<bool> hide_vert = attributes.lookup_or_default<bool>( + ".hide_vert", ATTR_DOMAIN_POINT, false); + threading::parallel_for(verts.index_range(), 4096, [&](IndexRange range) { + for (const int i : range) { + SET_FLAG_FROM_TEST(verts[i].flag, hide_vert[i], ME_HIDE); + } + }); + + MutableSpan<MEdge> edges = mesh->edges_for_write(); + const VArray<bool> hide_edge = attributes.lookup_or_default<bool>( + ".hide_edge", ATTR_DOMAIN_EDGE, false); + threading::parallel_for(edges.index_range(), 4096, [&](IndexRange range) { + for (const int i : range) { + SET_FLAG_FROM_TEST(edges[i].flag, hide_edge[i], ME_HIDE); + } + }); + + MutableSpan<MPoly> polys = mesh->polys_for_write(); + const VArray<bool> hide_poly = attributes.lookup_or_default<bool>( + ".hide_poly", ATTR_DOMAIN_FACE, false); + threading::parallel_for(polys.index_range(), 4096, [&](IndexRange range) { + for (const int i : range) { + SET_FLAG_FROM_TEST(polys[i].flag, hide_poly[i], ME_HIDE); + } + }); +} + +void BKE_mesh_legacy_convert_flags_to_hide_layers(Mesh *mesh) +{ + using namespace blender; + using namespace blender::bke; + MutableAttributeAccessor attributes = mesh->attributes_for_write(); + + const Span<MVert> verts = mesh->verts(); + if (std::any_of( + verts.begin(), verts.end(), [](const MVert &vert) { return vert.flag & ME_HIDE; })) { + SpanAttributeWriter<bool> hide_vert = attributes.lookup_or_add_for_write_only_span<bool>( + ".hide_vert", ATTR_DOMAIN_POINT); + threading::parallel_for(verts.index_range(), 4096, [&](IndexRange range) { + for (const int i : range) { + hide_vert.span[i] = verts[i].flag & ME_HIDE; + } + }); + hide_vert.finish(); + } + + const Span<MEdge> edges = mesh->edges(); + if (std::any_of( + edges.begin(), edges.end(), [](const MEdge &edge) { return edge.flag & ME_HIDE; })) { + SpanAttributeWriter<bool> hide_edge = attributes.lookup_or_add_for_write_only_span<bool>( + ".hide_edge", ATTR_DOMAIN_EDGE); + threading::parallel_for(edges.index_range(), 4096, [&](IndexRange range) { + for (const int i : range) { + hide_edge.span[i] = edges[i].flag & ME_HIDE; + } + }); + hide_edge.finish(); + } + + const Span<MPoly> polys = mesh->polys(); + if (std::any_of( + polys.begin(), polys.end(), [](const MPoly &poly) { return poly.flag & ME_HIDE; })) { + SpanAttributeWriter<bool> hide_poly = attributes.lookup_or_add_for_write_only_span<bool>( + ".hide_poly", ATTR_DOMAIN_FACE); + threading::parallel_for(polys.index_range(), 4096, [&](IndexRange range) { + for (const int i : range) { + hide_poly.span[i] = polys[i].flag & ME_HIDE; + } + }); + hide_poly.finish(); + } +} + +/** \} */ +/* -------------------------------------------------------------------- */ +/** \name Material Index Conversion + * \{ */ + +void BKE_mesh_legacy_convert_material_indices_to_mpoly(Mesh *mesh) +{ + using namespace blender; + using namespace blender::bke; + const AttributeAccessor attributes = mesh->attributes(); + MutableSpan<MPoly> polys = mesh->polys_for_write(); + const VArray<int> material_indices = attributes.lookup_or_default<int>( + "material_index", ATTR_DOMAIN_FACE, 0); + threading::parallel_for(polys.index_range(), 4096, [&](IndexRange range) { + for (const int i : range) { + polys[i].mat_nr = material_indices[i]; + } + }); +} + +void BKE_mesh_legacy_convert_mpoly_to_material_indices(Mesh *mesh) +{ + using namespace blender; + using namespace blender::bke; + MutableAttributeAccessor attributes = mesh->attributes_for_write(); + const Span<MPoly> polys = mesh->polys(); + if (std::any_of( + polys.begin(), polys.end(), [](const MPoly &poly) { return poly.mat_nr != 0; })) { + SpanAttributeWriter<int> material_indices = attributes.lookup_or_add_for_write_only_span<int>( + "material_index", ATTR_DOMAIN_FACE); + threading::parallel_for(polys.index_range(), 4096, [&](IndexRange range) { + for (const int i : range) { + material_indices.span[i] = polys[i].mat_nr; + } + }); + material_indices.finish(); + } +} + +/** \} */ |