Add the full source of BambuStudio

using version 1.0.10

src/libslic3r/Fill/FillHoneycomb.cpp

@@ -0,0 +1,83 @@
+#include "../ClipperUtils.hpp"
+#include "../ShortestPath.hpp"
+#include "../Surface.hpp"
+
+#include "FillHoneycomb.hpp"
+
+namespace Slic3r {
+
+void FillHoneycomb::_fill_surface_single(
+    const FillParams                &params, 
+    unsigned int                     thickness_layers,
+    const std::pair<float, Point>   &direction, 
+    ExPolygon                        expolygon,
+    Polylines                       &polylines_out)
+{
+    // cache hexagons math
+    CacheID cache_id(params.density, this->spacing);
+    Cache::iterator it_m = this->cache.find(cache_id);
+    if (it_m == this->cache.end()) {
+        it_m = this->cache.insert(it_m, std::pair<CacheID, CacheData>(cache_id, CacheData()));
+        CacheData &m        = it_m->second;
+        coord_t min_spacing = coord_t(scale_(this->spacing));
+        m.distance          = coord_t(min_spacing / params.density);
+        m.hex_side          = coord_t(m.distance / (sqrt(3)/2));
+        m.hex_width         = m.distance * 2; // $m->{hex_width} == $m->{hex_side} * sqrt(3);
+        coord_t hex_height  = m.hex_side * 2;
+        m.pattern_height    = hex_height + m.hex_side;
+        m.y_short           = coord_t(m.distance * sqrt(3)/3);
+        m.x_offset          = min_spacing / 2;
+        m.y_offset          = coord_t(m.x_offset * sqrt(3)/3);
+        m.hex_center        = Point(m.hex_width/2, m.hex_side);
+    }
+    CacheData &m = it_m->second;
+
+    Polylines all_polylines;
+    {
+        // adjust actual bounding box to the nearest multiple of our hex pattern
+        // and align it so that it matches across layers
+        
+        BoundingBox bounding_box = expolygon.contour.bounding_box();
+        {
+            // rotate bounding box according to infill direction
+            Polygon bb_polygon = bounding_box.polygon();
+            bb_polygon.rotate(direction.first, m.hex_center);
+            bounding_box = bb_polygon.bounding_box();
+            
+            // extend bounding box so that our pattern will be aligned with other layers
+            // $bounding_box->[X1] and [Y1] represent the displacement between new bounding box offset and old one
+            // The infill is not aligned to the object bounding box, but to a world coordinate system. Supposedly good enough.
+            bounding_box.merge(align_to_grid(bounding_box.min, Point(m.hex_width, m.pattern_height)));
+        }
+
+        coord_t x = bounding_box.min(0);
+        while (x <= bounding_box.max(0)) {
+            Polyline p;
+            coord_t ax[2] = { x + m.x_offset, x + m.distance - m.x_offset };
+            for (size_t i = 0; i < 2; ++ i) {
+                std::reverse(p.points.begin(), p.points.end()); // turn first half upside down
+                for (coord_t y = bounding_box.min(1); y <= bounding_box.max(1); y += m.y_short + m.hex_side + m.y_short + m.hex_side) {
+                    p.points.push_back(Point(ax[1], y + m.y_offset));
+                    p.points.push_back(Point(ax[0], y + m.y_short - m.y_offset));
+                    p.points.push_back(Point(ax[0], y + m.y_short + m.hex_side + m.y_offset));
+                    p.points.push_back(Point(ax[1], y + m.y_short + m.hex_side + m.y_short - m.y_offset));
+                    p.points.push_back(Point(ax[1], y + m.y_short + m.hex_side + m.y_short + m.hex_side + m.y_offset));
+                }
+                ax[0] = ax[0] + m.distance;
+                ax[1] = ax[1] + m.distance;
+                std::swap(ax[0], ax[1]); // draw symmetrical pattern
+                x += m.distance;
+            }
+            p.rotate(-direction.first, m.hex_center);
+            all_polylines.push_back(p);
+        }
+    }
+    
+    all_polylines = intersection_pl(std::move(all_polylines), expolygon);
+    if (params.dont_connect() || all_polylines.size() <= 1)
+        append(polylines_out, chain_polylines(std::move(all_polylines)));
+    else
+        connect_infill(std::move(all_polylines), expolygon, polylines_out, this->spacing, params);
+}
+
+} // namespace Slic3r