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/*
* 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.
*/
#pragma once
/** \file
* \ingroup bmesh
*/
#include "BLI_compiler_attrs.h"
/**
* Parameters used to determine which kinds of data needs to be generated.
*/
typedef struct BMPartialUpdate_Params {
bool do_normals;
bool do_tessellate;
} BMPartialUpdate_Params;
/**
* Cached data to speed up partial updates.
*
* Hints:
*
* - Avoid creating this data for single updates,
* it should be created and reused across multiple updates to gain a significant benefit
* (while transforming geometry for example).
*
* - Partial normal updates use face & loop indices,
* setting them to dirty values between updates will slow down normal recalculation.
*/
typedef struct BMPartialUpdate {
BMVert **verts;
BMFace **faces;
int verts_len, verts_len_alloc;
int faces_len, faces_len_alloc;
/** Store the parameters used in creation so invalid use can be asserted. */
BMPartialUpdate_Params params;
} BMPartialUpdate;
/**
* All Tagged & Connected, see: #BM_mesh_partial_create_from_verts
* Operate on everything that's tagged as well as connected geometry.
*/
BMPartialUpdate *BM_mesh_partial_create_from_verts(BMesh *bm,
const BMPartialUpdate_Params *params,
const unsigned int *verts_mask,
const int verts_mask_count)
ATTR_NONNULL(1, 2, 3) ATTR_WARN_UNUSED_RESULT;
/**
* All Connected, operate on all faces that have both tagged and un-tagged vertices.
*
* Reduces computations when transforming isolated regions.
*/
BMPartialUpdate *BM_mesh_partial_create_from_verts_group_single(
BMesh *bm,
const BMPartialUpdate_Params *params,
const unsigned int *verts_mask,
const int verts_mask_count) ATTR_NONNULL(1, 2, 3) ATTR_WARN_UNUSED_RESULT;
/**
* All Connected, operate on all faces that have vertices in the same group.
*
* Reduces computations when transforming isolated regions.
*
* This is a version of #BM_mesh_partial_create_from_verts_group_single
* that handles multiple groups instead of a bitmap mask.
*
* This is needed for example when transform has mirror enabled,
* since one side needs to have a different group to the other since a face that has vertices
* attached to both won't have an affine transformation.
*
* \param verts_group: Vertex aligned array of groups.
* Values are used as follows:
* - >0: Each face is grouped with other faces of the same group.
* - 0: Not in a group (don't handle these).
* - -1: Don't use grouping logic (include any face that contains a vertex with this group).
* \param verts_group_count: The number of non-zero values in `verts_groups`.
*/
BMPartialUpdate *BM_mesh_partial_create_from_verts_group_multi(
BMesh *bm,
const BMPartialUpdate_Params *params,
const int *verts_group,
const int verts_group_count) ATTR_NONNULL(1, 2, 3) ATTR_WARN_UNUSED_RESULT;
void BM_mesh_partial_destroy(BMPartialUpdate *bmpinfo) ATTR_NONNULL(1);
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