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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2001-2002 NaN Holding BV. All rights reserved. */
#pragma once
/** \file
* \ingroup bke
*/
#include "BLI_utildefines.h"
#ifdef __cplusplus
extern "C" {
#endif
struct CustomData;
struct Mesh;
struct MFace;
/**
* Convert the hidden element attributes to the old flag format for writing.
*/
void BKE_mesh_legacy_convert_hide_layers_to_flags(struct Mesh *mesh);
/**
* Convert the old hide flags (#ME_HIDE) to the hidden element attribute for reading.
* Only add the attributes when there are any elements in each domain hidden.
*/
void BKE_mesh_legacy_convert_flags_to_hide_layers(struct Mesh *mesh);
/**
* Recreate #MFace Tessellation.
*
* \note This doesn't use multi-threading like #BKE_mesh_recalc_looptri since
* it's not used in many places and #MFace should be phased out.
*/
void BKE_mesh_tessface_calc(struct Mesh *mesh);
void BKE_mesh_tessface_ensure(struct Mesh *mesh);
void BKE_mesh_add_mface_layers(struct CustomData *fdata, struct CustomData *ldata, int total);
/**
* Rotates the vertices of a face in case v[2] or v[3] (vertex index) is = 0.
* this is necessary to make the if #MFace.v4 check for quads work.
*/
int BKE_mesh_mface_index_validate(struct MFace *mface,
struct CustomData *mfdata,
int mfindex,
int nr);
void BKE_mesh_convert_mfaces_to_mpolys(struct Mesh *mesh);
/**
* The same as #BKE_mesh_convert_mfaces_to_mpolys
* but oriented to be used in #do_versions from `readfile.c`
* the difference is how active/render/clone/stencil indices are handled here.
*
* normally they're being set from `pdata` which totally makes sense for meshes which are already
* converted to #BMesh structures, but when loading older files indices shall be updated in other
* way around, so newly added `pdata` and `ldata` would have this indices set
* based on `fdata` layer.
*
* this is normally only needed when reading older files,
* in all other cases #BKE_mesh_convert_mfaces_to_mpolys shall be always used.
*/
void BKE_mesh_do_versions_convert_mfaces_to_mpolys(struct Mesh *mesh);
/* Inlines */
/* NOTE(@sybren): Instead of -1 that function uses ORIGINDEX_NONE as defined in BKE_customdata.h,
* but I don't want to force every user of BKE_mesh.h to also include that file. */
BLI_INLINE int BKE_mesh_origindex_mface_mpoly(const int *index_mf_to_mpoly,
const int *index_mp_to_orig,
const int i)
{
const int j = index_mf_to_mpoly[i];
return (j != -1) ? (index_mp_to_orig ? index_mp_to_orig[j] : j) : -1;
}
#ifdef __cplusplus
}
#endif
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