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BMesh: add UV face transform and minmax utility functions

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This commit is contained in:
Campbell Barton 2020-11-17 23:49:18 +11:00
parent 7785a9c9d2
commit 6694d7ac5f
2 changed files with 25 additions and 0 deletions
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22
source/blender/bmesh/intern/bmesh_query_uv.c
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@ -126,6 +126,28 @@ float BM_face_uv_calc_cross(const BMFace *f, const int cd_loop_uv_offset)
return cross_poly_v2(uvs, f->len);
}
void BM_face_uv_minmax(const BMFace *f, float min[2], float max[2], const int cd_loop_uv_offset)
{
const BMLoop *l_iter;
const BMLoop *l_first;
l_iter = l_first = BM_FACE_FIRST_LOOP(f);
do {
const MLoopUV *luv = BM_ELEM_CD_GET_VOID_P(l_iter, cd_loop_uv_offset);
minmax_v2v2_v2(min, max, luv->uv);
} while ((l_iter = l_iter->next) != l_first);
}
void BM_face_uv_transform(BMFace *f, const float matrix[2][2], const int cd_loop_uv_offset)
{
BMLoop *l_iter;
BMLoop *l_first;
l_iter = l_first = BM_FACE_FIRST_LOOP(f);
do {
MLoopUV *luv = BM_ELEM_CD_GET_VOID_P(l_iter, cd_loop_uv_offset);
mul_m2_v2(matrix, luv->uv);
} while ((l_iter = l_iter->next) != l_first);
}
/**
* Check if two loops that share an edge also have the same UV coordinates.
*/

3
source/blender/bmesh/intern/bmesh_query_uv.h
View file

@ -37,6 +37,9 @@ void BM_face_uv_calc_center_median(const BMFace *f, const int cd_loop_uv_offset,
float BM_face_uv_calc_cross(const BMFace *f, const int cd_loop_uv_offset) ATTR_WARN_UNUSED_RESULT
ATTR_NONNULL();
void BM_face_uv_minmax(const BMFace *f, float min[2], float max[2], const int cd_loop_uv_offset);
void BM_face_uv_transform(BMFace *f, const float matix[2][2], const int cd_loop_uv_offset);
bool BM_loop_uv_share_edge_check_with_limit(BMLoop *l_a,
BMLoop *l_b,
const float limit[2],