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fix assembly bounding box truncation problems noticed by hotcubcar (#28)

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This commit is contained in:
Joseph Robertson
2026-05-20 02:46:41 -05:00
committed by GitHub
parent cd5fb68d38
commit 218881c6f6
1 changed files with 13 additions and 2 deletions
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15
src/libslic3r/PrintObjectSlice.cpp
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@@ -322,20 +322,31 @@ static std::vector<std::vector<ExPolygons>> slices_to_regions(
}
} else {
zs_complex.reserve(zs.size());
// region.bbox is computed in pre-belt-shear slicer space (see PrintApply.cpp::trafo_for_bbox).
// When belt transforms are active, layer Z values are in post-shear/scale/remap space,
// so the Z components of region.bbox aren't comparable to z. Skipping the Z filter here
// pushes those layers into the parallel_for path below, which handles multi-volume
// clipping per layer without relying on the bbox Z range.
const bool bbox_z_in_layer_frame = !(print_config.belt_printer.value &&
(BeltTransformPipeline::has_shear(print_config)
|| BeltTransformPipeline::has_scale(print_config)
|| BeltTransformPipeline::has_preslice_remap(print_config)));
for (; z_idx < zs.size() && zs[z_idx] < layer_range.layer_height_range.second; ++ z_idx) {
float z = zs[z_idx];
int idx_first_printable_region = -1;
bool complex = false;
for (int idx_region = 0; idx_region < int(layer_range.volume_regions.size()); ++ idx_region) {
const PrintObjectRegions::VolumeRegion &region = layer_range.volume_regions[idx_region];
if (region.bbox->min().z() <= z && region.bbox->max().z() >= z) {
if (!bbox_z_in_layer_frame || (region.bbox->min().z() <= z && region.bbox->max().z() >= z)) {
if (idx_first_printable_region == -1 && region.model_volume->is_model_part())
idx_first_printable_region = idx_region;
else if (idx_first_printable_region != -1) {
// Test for overlap with some other region.
for (int idx_region2 = idx_first_printable_region; idx_region2 < idx_region; ++ idx_region2) {
const PrintObjectRegions::VolumeRegion &region2 = layer_range.volume_regions[idx_region2];
if (region2.bbox->min().z() <= z && region2.bbox->max().z() >= z && overlap_in_xy(*region.bbox, *region2.bbox)) {
const bool region2_in_z = !bbox_z_in_layer_frame
|| (region2.bbox->min().z() <= z && region2.bbox->max().z() >= z);
if (region2_in_z && overlap_in_xy(*region.bbox, *region2.bbox)) {
complex = true;
break;
}