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Keep the prime tower and its approach travel on non-rectangular beds

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The placement clamps and the tower-approach router both stood in the bed's
bounding box for the bed itself, so on a delta or hexagonal bed the prime tower
could be parked in a corner that does not exist and the nozzle could be routed
across it. Both now test the real printable outline, slicing reports a tower
that does not fit instead of printing it off the bed, and a tower parked near an
edge is routed along the clamped side rather than falling back to a straight
line across the tower.

Also fixes the placement validation rotating the tower hull by degrees read as
radians about the plate origin, and never rotating the generated tower footprint
at all.
This commit is contained in:
SoftFever
2026-08-06 15:48:40 +08:00
parent aa4e28b2b5
commit 7c73739e1a
10 changed files with 224 additions and 115 deletions
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src/libslic3r/Print.cpp
+18 -1
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@@ -1048,13 +1048,14 @@ static StringObjectException layered_print_cleareance_valid(const Print &print,
wipe_tower_convex_hull.points.emplace_back(scale_(x + width), scale_(y));
wipe_tower_convex_hull.points.emplace_back(scale_(x + width), scale_(y + depth));
wipe_tower_convex_hull.points.emplace_back(scale_(x), scale_(y + depth));
wipe_tower_convex_hull.rotate(a);
wipe_tower_convex_hull.rotate(Geometry::deg2rad(a), Point(scale_(x), scale_(y)));
convex_hulls_temp.push_back(wipe_tower_convex_hull);
} else {
//here, wipe_tower_polygon is not always convex.
Polygon wipe_tower_polygon;
if (print.wipe_tower_data().wipe_tower_mesh_data)
wipe_tower_polygon = print.wipe_tower_data().wipe_tower_mesh_data->bottom;
wipe_tower_polygon.rotate(Geometry::deg2rad(a));
wipe_tower_polygon.translate(Point(scale_(x), scale_(y)));
convex_hulls_temp.push_back(wipe_tower_polygon);
}
@@ -1073,6 +1074,22 @@ static StringObjectException layered_print_cleareance_valid(const Print &print,
if (print_config.enable_wrapping_detection.value && !intersection({wrapping_poly}, convex_hulls_temp).empty()) {
return {L("Prime Tower") + L(" is too close to clumping detection area, and collisions will be caused.\n")};
}
// Skip the containment check for towers that will never be printed (single-filament
// prints without smooth timelapse keep the config's tower position but emit nothing).
// Pre-generation only the body square is tested — the auto-brim estimate can overshoot
// the generated brim by several mm and must not hard-fail a print that physically fits.
// Post-generation the mesh bottom already includes the real brim, so the exact
// footprint is tested.
if (filaments_count > 1 || print.enable_timelapse_print()) {
// The shared printable polygon is plate-local, while the tower polygons above are
// already shifted by the plate origin.
Polygons printable_polys = print.get_extruder_shared_printable_polygon();
const Point plate_shift(scale_(plate_origin.x()), scale_(plate_origin.y()));
for (Polygon &p : printable_polys)
p.translate(plate_shift);
if (!diff(convex_hulls_temp, printable_polys).empty())
return {L("Prime Tower") + L(" is partially outside the printable area, and it cannot be printed.\n")};
}
return {};
}