Initial integration of the Prusa MultiMatrial Wipe Tower.

xs/src/libslic3r/GCode/WipeTower.hpp

@@ -0,0 +1,59 @@
+#ifndef slic3r_WipeTower_hpp_
+#define slic3r_WipeTower_hpp_
+
+#include <utility>
+#include <string>
+
+namespace Slic3r
+{
+
+// A pure virtual WipeTower definition.
+class WipeTower
+{
+public:
+	// Internal point class, to make the wipe tower independent from other slic3r modules.
+	// This is important for Prusa Research as we want to build the wipe tower post-processor independently from slic3r.
+	struct xy
+	{
+		xy(float x = 0.f, float y = 0.f) : x(x), y(y) {}
+		xy  operator+(const xy &rhs) const { xy out(*this); out.x += rhs.x; out.y += rhs.y; return out; }
+		xy  operator-(const xy &rhs) const { xy out(*this); out.x -= rhs.x; out.y -= rhs.y; return out; }
+		xy& operator+=(const xy &rhs) { x += rhs.x; y += rhs.y; return *this; }
+		xy& operator-=(const xy &rhs) { x -= rhs.x; y -= rhs.y; return *this; }
+		float x;
+		float y;
+	};
+
+	WipeTower() {}
+	virtual ~WipeTower() {}
+
+	// Return the wipe tower position.
+	virtual const xy& position() const = 0;
+
+	// The wipe tower is finished, there should be no more tool changes or wipe tower prints.
+	virtual bool 	  finished() const = 0;
+
+	// Switch to a next layer.
+	virtual void 	  set_layer(
+		// Print height of this layer.
+		float  print_z,
+		// Layer height, used to calculate extrusion the rate. 
+		float  layer_height, 
+		// Maximum number of tool changes on this layer or the layers below.
+		size_t max_tool_changes, 
+		// Is this the first layer of the print? In that case print the brim first.
+		bool   is_first_layer,
+		// Is this the last layer of the wipe tower?
+		bool   is_last_layer) = 0;
+
+	// Returns gcode for toolchange and the end position.
+	// if new_tool == -1, just unload the current filament over the wipe tower.
+	virtual std::pair<std::string, xy> tool_change(int new_tool) = 0;
+
+	// Close the current wipe tower layer with a perimeter and possibly fill the unfilled space with a zig-zag.
+	virtual std::pair<std::string, xy> close_layer() = 0;
+};
+
+}; // namespace Slic3r
+
+#endif /* slic3r_WipeTower_hpp_ */