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purge tower still centered on X max

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This commit is contained in:
harrierpigeon
2026-08-08 16:35:55 -05:00
parent 60e9ee26c9
commit 62d8f22f52
1 changed files with 28 additions and 19 deletions
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src/slic3r/GUI/Plater.cpp
+28 -19
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@@ -9010,7 +9010,6 @@ bool Plater::priv::ensure_belt_purge_tower()
if ((rot == BeltRotationAxis::X || rot == BeltRotationAxis::Y) && angle_opt != nullptr && std::abs(angle_opt->value) > EPSILON)
theta = std::clamp(Geometry::deg2rad(std::abs(angle_opt->value)), Geometry::deg2rad(5.), M_PI / 2.);
const double sin_t = std::sin(theta);
const double cot_t = std::cos(theta) / sin_t;
// Parts' extent along the belt-travel axis and the lateral (across-belt) axis.
const double belt_min = belt_is_y ? y_min : x_min;
@@ -9075,36 +9074,46 @@ bool Plater::priv::ensure_belt_purge_tower()
return false; // already up to date — do not touch the model
// --- Position ----------------------------------------------------------
// Default belt-printer placement (per user request):
// - belt-travel axis: anchored at the parts' belt-axis MINIMUM (the belt
// entry / parts' min Y for an X-rotation belt) so the tower leads in.
// - across-belt axis: parked right up against the bed's MAXIMUM edge
// (max X for an X-rotation belt), out of the way of the parts.
// The bar extends from the parts' belt minimum past the parts; a tilted
// slicing plane through a part of height z reaches belt position
// y + z*cot(theta), so the trailing end covers the tallest part's upper
// toolchanges plus the bar's own tilt span.
// Belt-travel axis: anchor the bar at the parts' belt-axis MINIMUM and span
// just the parts' belt extent (+ small margin). Filament changes happen
// over the parts' belt band, so the bar must sit there to absorb them;
// extending it far up the belt moves its body away from the toolchange
// layers and the purge goes unabsorbed (empirically, moving the tower
// toward the parts' Y-min clears the "cannot absorb" warning).
const double margin = 5.;
const double belt_start = belt_min; // parts' belt-axis minimum
const double belt_end = belt_max + (z_max + height) * cot_t + margin; // trailing tilt allowance
const double belt_start = belt_min; // parts' belt-axis minimum
const double belt_end = belt_max + margin; // just past the parts — stay low / near the parts
const double length = std::max(belt_end - belt_start, 10.);
const double belt_center = 0.5 * (belt_start + belt_end);
// Across-belt: flush against the bed's maximum edge, inset by half the bar
// width so the bar's far edge sits on the boundary and the whole bar stays
// on the bed (otherwise the center lands on the edge and half the bar hangs
// off → "objects laid over the boundary" → no slicing). Coordinates are in
// the printable_area / instance frame (do NOT add plate origin — the belt
// calibration objects are positioned the same way, see _calib_temp_belt_*).
const double inset = 1.;
double lat_center = lat_max + 5. + 0.5 * width; // fallback: just past the parts
// on the bed. The bed (printable_area) is plate-local but model instances
// live in the plate's world frame, so add the plate origin's lateral
// component (plate-origin compensation is needed throughout the belt
// pipeline). lat_min/lat_max come from instance_bounding_box (world frame).
const Vec3d plate_origin = plate->get_origin();
const double lat_origin = plate_origin[belt_is_y ? 0 : 1];
const double inset = 1.;
double lat_center = lat_max + 5. + 0.5 * width; // fallback: just past the parts
BoundingBoxf bed_ext_dbg;
if (const auto *bed_opt = printer_config.option<ConfigOptionPoints>("printable_area");
bed_opt != nullptr && !bed_opt->values.empty()) {
const BoundingBoxf bed_ext = get_extents(bed_opt->values);
bed_ext_dbg = bed_ext;
const double bed_lat_max = belt_is_y ? bed_ext.max.x() : bed_ext.max.y();
lat_center = bed_lat_max - inset - 0.5 * width;
lat_center = lat_origin + bed_lat_max - inset - 0.5 * width;
}
// Ground-truth diagnostic for placement frames (warning level so it lands
// in the GUI debug log): plate origin, bed extents, parts bbox, result.
BOOST_LOG_TRIVIAL(warning) << "[BELT-DEBUG] purge place"
<< " plate_origin=(" << plate_origin.x() << "," << plate_origin.y() << ")"
<< " parts_x=[" << x_min << "," << x_max << "] parts_y=[" << y_min << "," << y_max << "] z_max=" << z_max
<< " bed_ext=[" << bed_ext_dbg.min.x() << "," << bed_ext_dbg.min.y()
<< " -> " << bed_ext_dbg.max.x() << "," << bed_ext_dbg.max.y() << "]"
<< " lat_center=" << lat_center << " belt=[" << belt_start << "," << belt_end << "]";
// Orient the bar: long axis = belt travel, width = lateral, height = Z.
const double size_x = belt_is_y ? width : length;
const double size_y = belt_is_y ? length : width;