Initial integration of the Prusa MultiMatrial Wipe Tower.

xs/src/libslic3r/GCode/ToolOrdering.hpp

@@ -0,0 +1,38 @@
+// Ordering of the tools to minimize tool switches.
+
+#ifndef slic3r_ToolOrdering_hpp_
+#define slic3r_ToolOrdering_hpp_
+
+#include "libslic3r.h"
+#include "Print.hpp"
+
+namespace Slic3r {
+namespace ToolOrdering {
+
+struct LayerTools
+{
+    LayerTools(const coordf_t z) : print_z(z), wipe_tower_partitions(0) {}
+
+    bool operator< (const LayerTools &rhs) const { return print_z <  rhs.print_z; }
+    bool operator==(const LayerTools &rhs) const { return print_z == rhs.print_z; }
+
+	coordf_t 					print_z;
+	// Zero based extruder IDs, ordered to minimize tool switches.
+	std::vector<unsigned int> 	extruders;
+	// Number of wipe tower partitions to support the required number of tool switches
+	// and to support the wipe tower partitions above this one.
+    size_t                      wipe_tower_partitions;
+};
+
+// For the use case when each object is printed separately
+// (print.config.complete_objects is true).
+extern std::vector<LayerTools> tool_ordering(PrintObject &object);
+
+// For the use case when all objects are printed at once.
+// (print.config.complete_objects is false).
+extern std::vector<LayerTools> tool_ordering(const Print &print);
+
+} // namespace ToolOrdering
+} // namespace SLic3r
+
+#endif /* slic3r_ToolOrdering_hpp_ */