diff options
Diffstat (limited to 'source/blender/gpencil_modifiers/intern/lineart/lineart_cpu.c')
| -rw-r--r-- | source/blender/gpencil_modifiers/intern/lineart/lineart_cpu.c | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/source/blender/gpencil_modifiers/intern/lineart/lineart_cpu.c b/source/blender/gpencil_modifiers/intern/lineart/lineart_cpu.c index a5af66cbbc5..31dd37db1a7 100644 --- a/source/blender/gpencil_modifiers/intern/lineart/lineart_cpu.c +++ b/source/blender/gpencil_modifiers/intern/lineart/lineart_cpu.c @@ -1529,8 +1529,9 @@ static uint16_t lineart_identify_feature_line(LineartRenderBuffer *rb, double *view_vector = vv; double dot_1 = 0, dot_2 = 0; double result; + bool material_back_face = ((tri1->flags | tri2->flags) & LRT_TRIANGLE_MAT_BACK_FACE_CULLING); - if (rb->use_contour || rb->use_back_face_culling) { + if (rb->use_contour || rb->use_back_face_culling || material_back_face) { if (rb->cam_is_persp) { sub_v3_v3v3_db(view_vector, rb->camera_pos, l->gloc); @@ -1555,14 +1556,19 @@ static uint16_t lineart_identify_feature_line(LineartRenderBuffer *rb, tri2->flags |= LRT_CULL_DISCARD; } } + if (material_back_face) { + if (tri1->flags & LRT_TRIANGLE_MAT_BACK_FACE_CULLING && dot_1 < 0) { + tri1->flags |= LRT_CULL_DISCARD; + } + if (tri2->flags & LRT_TRIANGLE_MAT_BACK_FACE_CULLING && dot_2 < 0) { + tri2->flags |= LRT_CULL_DISCARD; + } + } } else { view_vector = rb->view_vector; } - dot_1 = dot_v3v3_db(view_vector, tri1->gn); - dot_2 = dot_v3v3_db(view_vector, tri2->gn); - if ((result = dot_1 * dot_2) <= 0 && (fabs(dot_1) + fabs(dot_2))) { edge_flag_result |= LRT_EDGE_FLAG_CONTOUR; } @@ -1573,6 +1579,16 @@ static uint16_t lineart_identify_feature_line(LineartRenderBuffer *rb, return edge_flag_result; } + /* Do not show lines other than contour on back face (because contour has one adjacent face that + * isn't a back face). + * TODO(Yiming): Do we need separate option for this? */ + if (rb->use_back_face_culling || + ((tri1->flags & tri2->flags) & LRT_TRIANGLE_MAT_BACK_FACE_CULLING)) { + if (dot_1 < 0 && dot_2 < 0) { + return edge_flag_result; + } + } + if (rb->use_crease) { if (rb->sharp_as_crease && !BM_elem_flag_test(e, BM_ELEM_SMOOTH)) { edge_flag_result |= LRT_EDGE_FLAG_CREASE; @@ -1859,6 +1875,9 @@ static void lineart_geometry_object_load(LineartObjectInfo *obi, LineartRenderBu mat->lineart.material_mask_bits : 0); tri->mat_occlusion |= (mat ? mat->lineart.mat_occlusion : 1); + tri->flags |= (mat && (mat->blend_flag & MA_BL_CULL_BACKFACE)) ? + LRT_TRIANGLE_MAT_BACK_FACE_CULLING : + 0; tri->intersection_mask = obi->override_intersection_mask; |