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/* SPDX-License-Identifier: GPL-2.0-or-later */
/** \file
* \ingroup bmesh
*
* BM Inline functions.
*/
#pragma once
/* stuff for dealing with header flags */
#define BM_elem_flag_test(ele, hflag) _bm_elem_flag_test(&(ele)->head, hflag)
#define BM_elem_flag_test_bool(ele, hflag) _bm_elem_flag_test_bool(&(ele)->head, hflag)
#define BM_elem_flag_enable(ele, hflag) _bm_elem_flag_enable(&(ele)->head, hflag)
#define BM_elem_flag_disable(ele, hflag) _bm_elem_flag_disable(&(ele)->head, hflag)
#define BM_elem_flag_set(ele, hflag, val) _bm_elem_flag_set(&(ele)->head, hflag, val)
#define BM_elem_flag_toggle(ele, hflag) _bm_elem_flag_toggle(&(ele)->head, hflag)
#define BM_elem_flag_merge(ele_a, ele_b) _bm_elem_flag_merge(&(ele_a)->head, &(ele_b)->head)
#define BM_elem_flag_merge_ex(ele_a, ele_b, hflag_and) \
_bm_elem_flag_merge_ex(&(ele_a)->head, &(ele_b)->head, hflag_and)
#define BM_elem_flag_merge_into(ele, ele_a, ele_b) \
_bm_elem_flag_merge_into(&(ele)->head, &(ele_a)->head, &(ele_b)->head)
ATTR_WARN_UNUSED_RESULT
BLI_INLINE char _bm_elem_flag_test(const BMHeader *head, const char hflag)
{
return head->hflag & hflag;
}
ATTR_WARN_UNUSED_RESULT
BLI_INLINE bool _bm_elem_flag_test_bool(const BMHeader *head, const char hflag)
{
return (head->hflag & hflag) != 0;
}
BLI_INLINE void _bm_elem_flag_enable(BMHeader *head, const char hflag)
{
head->hflag |= hflag;
}
BLI_INLINE void _bm_elem_flag_disable(BMHeader *head, const char hflag)
{
head->hflag &= (char)~hflag;
}
BLI_INLINE void _bm_elem_flag_set(BMHeader *head, const char hflag, const int val)
{
if (val) {
_bm_elem_flag_enable(head, hflag);
}
else {
_bm_elem_flag_disable(head, hflag);
}
}
BLI_INLINE void _bm_elem_flag_toggle(BMHeader *head, const char hflag)
{
head->hflag ^= hflag;
}
BLI_INLINE void _bm_elem_flag_merge(BMHeader *head_a, BMHeader *head_b)
{
head_a->hflag = head_b->hflag = head_a->hflag | head_b->hflag;
}
BLI_INLINE void _bm_elem_flag_merge_ex(BMHeader *head_a, BMHeader *head_b, const char hflag_and)
{
if (((head_a->hflag & head_b->hflag) & hflag_and) == 0) {
head_a->hflag &= ~hflag_and;
head_b->hflag &= ~hflag_and;
}
_bm_elem_flag_merge(head_a, head_b);
}
BLI_INLINE void _bm_elem_flag_merge_into(BMHeader *head,
const BMHeader *head_a,
const BMHeader *head_b)
{
head->hflag = head_a->hflag | head_b->hflag;
}
/**
* notes on #BM_elem_index_set(...) usage,
* Set index is sometimes abused as temp storage, other times we can't be
* sure if the index values are valid because certain operations have modified
* the mesh structure.
*
* To set the elements to valid indices 'BM_mesh_elem_index_ensure' should be used
* rather than adding inline loops, however there are cases where we still
* set the index directly
*
* In an attempt to manage this,
* here are 5 tags I'm adding to uses of #BM_elem_index_set
*
* - 'set_inline' -- since the data is already being looped over set to a
* valid value inline.
*
* - 'set_dirty!' -- intentionally sets the index to an invalid value,
* flagging 'bm->elem_index_dirty' so we don't use it.
*
* - 'set_ok' -- this is valid use since the part of the code is low level.
*
* - 'set_ok_invalid' -- set to -1 on purpose since this should not be
* used without a full array re-index, do this on
* adding new vert/edge/faces since they may be added at
* the end of the array.
*
* - campbell */
#define BM_elem_index_get(ele) _bm_elem_index_get(&(ele)->head)
#define BM_elem_index_set(ele, index) _bm_elem_index_set(&(ele)->head, index)
BLI_INLINE void _bm_elem_index_set(BMHeader *head, const int index)
{
head->index = index;
}
ATTR_WARN_UNUSED_RESULT
BLI_INLINE int _bm_elem_index_get(const BMHeader *head)
{
return head->index;
}
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