diff options
Diffstat (limited to 'source/blender/bmesh')
-rw-r--r-- | source/blender/bmesh/tools/bmesh_bevel.c | 45 |
1 files changed, 34 insertions, 11 deletions
diff --git a/source/blender/bmesh/tools/bmesh_bevel.c b/source/blender/bmesh/tools/bmesh_bevel.c index 5d4082aded4..159520d6d67 100644 --- a/source/blender/bmesh/tools/bmesh_bevel.c +++ b/source/blender/bmesh/tools/bmesh_bevel.c @@ -209,6 +209,7 @@ typedef struct BevelParams { float offset; /* blender units to offset each side of a beveled edge */ int offset_type; /* how offset is measured; enum defined in bmesh_operators.h */ int seg; /* number of segments in beveled edge profile */ + float profile; /* user profile setting */ float pro_super_r; /* superellipse parameter for edge profile */ bool vertex_only; /* bevel vertices only */ bool use_weights; /* bevel amount affected by weights on edges or verts */ @@ -3592,7 +3593,23 @@ static VMesh *adj_vmesh(BevelParams *bp, BevVert *bv) float co[3], coa[3], cob[3], dir[3]; BoundVert *bndv; MemArena *mem_arena = bp->mem_arena; - float r, fac, fullness; + float r, p, fullness; + /* best fullness for circles, segs = 2,4,6,8,10 */ +#define CIRCLE_FULLNESS_SEGS 11 + static const float circle_fullness[CIRCLE_FULLNESS_SEGS] = { + 0.0f, /* nsegs ==1 */ + 0.559f, /* 2 */ + 0.642f, /* 3 */ + 0.551f, /* 4 */ + 0.646f, /* 5 */ + 0.624f, /* 6 */ + 0.646f, /* 7 */ + 0.619f, /* 8 */ + 0.647f, /* 9 */ + 0.639f, /* 10 */ + 0.647f, /* 11 */ + }; + n = bv->vmesh->count; /* Same bevel as that of 3 edges of vert in a cube */ @@ -3624,20 +3641,25 @@ static VMesh *adj_vmesh(BevelParams *bp, BevVert *bv) mul_v3_fl(co, 1.0f / (float)n); sub_v3_v3v3(cob, co, coa); add_v3_v3(cob, co); + + /* An offline optimization process found fullness that let to closest fit to sphere as + * a function of r and ns (for case of cube corner) */ r = bp->pro_super_r; - if (r == 1.0f) + p = bp->profile; + if (r == PRO_LINE_R) { fullness = 0.0f; - else if (r > 1.0f) { - if (bp->vertex_only) - fac = 0.25f; - else if (r == PRO_SQUARE_R) - fac = -2.0; - else - fac = 0.5f; - fullness = 1.0f - fac / r; + } + else if (r == PRO_CIRCLE_R && ns > 0 && ns <= CIRCLE_FULLNESS_SEGS) { + fullness = circle_fullness[ns - 1]; } else { - fullness = r - 1.0f; + /* linear regression fit found best linear function, separately for even/odd segs */ + if (ns % 2 == 0) { + fullness = 2.4506f * p - 0.00000300f * ns - 0.6266f; + } + else { + fullness = 2.3635f * p + 0.000152f * ns - 0.6060f; + } } sub_v3_v3v3(dir, coa, co); if (len_squared_v3(dir) > BEVEL_EPSILON_SQ) @@ -6030,6 +6052,7 @@ void BM_mesh_bevel( bp.offset = offset; bp.offset_type = offset_type; bp.seg = segments; + bp.profile = profile; bp.pro_super_r = -log(2.0) / log(sqrt(profile)); /* convert to superellipse exponent */ bp.vertex_only = vertex_only; bp.use_weights = use_weights; |