diff options
Diffstat (limited to 'source/blender/blenkernel/intern/deform.c')
| -rw-r--r-- | source/blender/blenkernel/intern/deform.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/source/blender/blenkernel/intern/deform.c b/source/blender/blenkernel/intern/deform.c index b09a0e92edb..135bf3e02ac 100644 --- a/source/blender/blenkernel/intern/deform.c +++ b/source/blender/blenkernel/intern/deform.c @@ -919,6 +919,40 @@ bool defvert_is_weight_zero(const struct MDeformVert *dvert, const int defgroup_ return true; } + +/** + * \return The representative weight of a multipaint group, used for + * viewport colors and actual painting. + * + * Result equal to sum of weights with auto normalize, and average otherwise. + * Value is not clamped, since painting relies on multiplication being always + * commutative with the collective weight function. + */ +float BKE_defvert_multipaint_collective_weight( + const struct MDeformVert *dv, int defbase_tot, + const bool *defbase_sel, int defbase_tot_sel, bool do_autonormalize) +{ + int i; + float total = 0.0f; + const MDeformWeight *dw = dv->dw; + + for (i = dv->totweight; i != 0; i--, dw++) { + /* in multipaint, get the average if auto normalize is inactive + * get the sum if it is active */ + if (dw->def_nr < defbase_tot) { + if (defbase_sel[dw->def_nr]) { + total += dw->weight; + } + } + } + + if (do_autonormalize == false) { + total /= defbase_tot_sel; + } + + return total; +} + /* -------------------------------------------------------------------- */ /* Defvert Array functions */ |