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FIX: first layer of common support may be apart from object

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In auto brim mode, first layer of common support may be apart from object island, which is controled by support object distance.
if support object distance is lower than "flow width + brim_object_gap", the brim will not work.
Therefore, if first layer of common support is interesected with object island, the distance will be brim_object_gap in auto brim mode.

Change-Id: Icbb98af8fd9e84e3ac1977794ca2b60629dd53dd
This commit is contained in:
wintergua 2022-08-03 15:06:18 +08:00 • committed by Lane.Wei
parent a00e58c3bf
commit 132d551794
1 changed files with 9 additions and 2 deletions
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11
src/libslic3r/SupportMaterial.cpp
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@ -3286,7 +3286,9 @@ PrintObjectSupportMaterial::MyLayersPtr PrintObjectSupportMaterial::generate_raf
const BrimType brim_type = object.config().brim_type;
const bool brim_outer = brim_type == btOuterOnly || brim_type == btOuterAndInner;
const bool brim_inner = brim_type == btInnerOnly || brim_type == btOuterAndInner;
const auto brim_object_gap = scaled<float>(object.config().brim_object_gap.value + object.config().brim_width.value);
// BBS: the pattern of raft and brim are the same, thus the brim can be serpated by support raft.
const auto brim_object_gap = scaled<float>(object.config().brim_object_gap.value);
//const auto brim_object_gap = scaled<float>(object.config().brim_object_gap.value + object.config().brim_width.value);
for (const ExPolygon &ex : object.layers().front()->lslices) {
if (brim_outer && brim_inner)
polygons_append(brim, offset(ex, brim_object_gap));
@ -3389,7 +3391,12 @@ PrintObjectSupportMaterial::MyLayersPtr PrintObjectSupportMaterial::generate_raf
if (columns_base != nullptr) {
// Expand the bases of the support columns in the 1st layer.
Polygons &raft = columns_base->polygons;
Polygons trimming = offset(m_object->layers().front()->lslices, (float)scale_(m_support_params.gap_xy), SUPPORT_SURFACES_OFFSET_PARAMETERS);
Polygons trimming;
// BBS: if first layer of support is intersected with object island, it must have the same function as brim unless in nobrim mode.
if (object.has_brim())
trimming = offset(m_object->layers().front()->lslices, (float)scale_(object.config().brim_object_gap.value), SUPPORT_SURFACES_OFFSET_PARAMETERS);
else
trimming = offset(m_object->layers().front()->lslices, (float)scale_(m_support_params.gap_xy), SUPPORT_SURFACES_OFFSET_PARAMETERS);
if (inflate_factor_1st_layer > SCALED_EPSILON) {
// Inflate in multiple steps to avoid leaking of the support 1st layer through object walls.
auto nsteps = std::max(5, int(ceil(inflate_factor_1st_layer / m_support_params.first_layer_flow.scaled_width())));