WIP: Moved sources int src/, separated most of the source code from Perl.

The XS was left only for the unit / integration tests, and it links
libslic3r only. No wxWidgets are allowed to be used from Perl starting
from now.

src/libslic3r/SLABasePool.hpp

@@ -0,0 +1,32 @@
+#ifndef SLASUPPORTPOOL_HPP
+#define SLASUPPORTPOOL_HPP
+
+#include <vector>
+
+namespace Slic3r {
+
+class ExPolygon;
+class TriangleMesh;
+
+namespace sla {
+
+using ExPolygons = std::vector<ExPolygon>;
+
+/// Calculate the polygon representing the slice of the lowest layer of mesh
+void ground_layer(const TriangleMesh& mesh,
+                  ExPolygons& output,
+                  float height = 0.1f);
+
+/// Calculate the pool for the mesh for SLA printing
+void create_base_pool(const ExPolygons& ground_layer,
+                      TriangleMesh& output_mesh,
+                      double min_wall_thickness_mm = 2,
+                      double min_wall_height_mm = 5,
+                      double max_merge_distance_mm = 50
+                      );
+
+}
+
+}
+
+#endif // SLASUPPORTPOOL_HPP