ENH: add arachne engine for narrow internal solid infill

ConcentricGapFill pattern was used for internal narrow solid infill. Use arachne engine instead to remove gap fill inside the pattern and improve the extrusion path Signed-off-by: salt.wei <salt.wei@bambulab.com> Change-Id: I758d7c72eb71cc37026b7cebf746cc345014c3f5 (cherry picked from commit 0b6bacd21a091afc13d7b36a69e5b10f155bc6f8)
2026-09-27 02:41:17 +00:00 · 2022-08-26 09:25:59 +08:00
parent cbefb77de3
commit aab8a12801
54 changed files with 7922 additions and 30 deletions
@@ -0,0 +1,79 @@
+//Copyright (c) 2022 Ultimaker B.V.
+//CuraEngine is released under the terms of the AGPLv3 or higher.
+
+#include <cassert>
+
+#include "BeadingStrategy.hpp"
+#include "Point.hpp"
+
+namespace Slic3r::Arachne
+{
+
+BeadingStrategy::BeadingStrategy(coord_t optimal_width, double wall_split_middle_threshold, double wall_add_middle_threshold, coord_t default_transition_length, float transitioning_angle)
+    : optimal_width(optimal_width)
+    , wall_split_middle_threshold(wall_split_middle_threshold)
+    , wall_add_middle_threshold(wall_add_middle_threshold)
+    , default_transition_length(default_transition_length)
+    , transitioning_angle(transitioning_angle)
+{
+    name = "Unknown";
+}
+
+BeadingStrategy::BeadingStrategy(const BeadingStrategy &other)
+    : optimal_width(other.optimal_width)
+    , wall_split_middle_threshold(other.wall_split_middle_threshold)
+    , wall_add_middle_threshold(other.wall_add_middle_threshold)
+    , default_transition_length(other.default_transition_length)
+    , transitioning_angle(other.transitioning_angle)
+    , name(other.name)
+{}
+
+coord_t BeadingStrategy::getTransitioningLength(coord_t lower_bead_count) const
+{
+    if (lower_bead_count == 0)
+        return scaled<coord_t>(0.01);
+    return default_transition_length;
+}
+
+float BeadingStrategy::getTransitionAnchorPos(coord_t lower_bead_count) const
+{
+    coord_t lower_optimum = getOptimalThickness(lower_bead_count);
+    coord_t transition_point = getTransitionThickness(lower_bead_count);
+    coord_t upper_optimum = getOptimalThickness(lower_bead_count + 1);
+    return 1.0 - float(transition_point - lower_optimum) / float(upper_optimum - lower_optimum);
+}
+
+std::vector<coord_t> BeadingStrategy::getNonlinearThicknesses(coord_t lower_bead_count) const
+{
+    return {};
+}
+
+std::string BeadingStrategy::toString() const
+{
+    return name;
+}
+
+double BeadingStrategy::getSplitMiddleThreshold() const
+{
+    return wall_split_middle_threshold;
+}
+
+double BeadingStrategy::getTransitioningAngle() const
+{
+    return transitioning_angle;
+}
+
+coord_t BeadingStrategy::getOptimalThickness(coord_t bead_count) const
+{
+    return optimal_width * bead_count;
+}
+
+coord_t BeadingStrategy::getTransitionThickness(coord_t lower_bead_count) const
+{
+    const coord_t lower_ideal_width  = getOptimalThickness(lower_bead_count);
+    const coord_t higher_ideal_width = getOptimalThickness(lower_bead_count + 1);
+    const double  threshold          = lower_bead_count % 2 == 1 ? wall_split_middle_threshold : wall_add_middle_threshold;
+    return lower_ideal_width + threshold * (higher_ideal_width - lower_ideal_width);
+}
+
+} // namespace Slic3r::Arachne