Initial implementation of C++ supports,

some documentation of the existing code.

xs/src/libslic3r/SupportMaterial.hpp

@@ -4,8 +4,191 @@
 namespace Slic3r {
 
 // how much we extend support around the actual contact area
-#define SUPPORT_MATERIAL_MARGIN 1.5
+#define SUPPORT_MATERIAL_MARGIN 1.5	
 
-}
+// Instantiated by Slic3r::Print::Object->_support_material()
+class PrintSupportMaterial
+{
+public:
+	enum SupporLayerType {
+		sltUnknown = 0,
+		sltRaft,
+		stlFirstLayer,
+		sltBottomContact,
+		sltBottomInterface,
+		sltBase,
+		sltTopInterface,
+		sltTopContact,
+		// Some undecided type yet. It will turn into stlBase first, then it may turn into stlBottomInterface or stlTopInterface.
+		stlIntermediate,
+	};
+
+	class MyLayer
+	{
+	public:
+		MyLayer() :
+			layer_type(sltUnknown),
+			print_z(0.),
+			bottom_z(0.),
+			height(0.),
+			idx_object_layer_above(size_t(-1)),
+			idx_object_layer_below(size_t(-1)),
+			bridging(false)
+			{}
+
+		~MyLayer() 
+		{
+			delete aux_polygons;
+			aux_polygons = NULL;
+		}
+
+		bool operator==(const MyLayer &layer2) const {
+			return print_z == layer2.printz && height == layer2.height && bridging == layer2.bridging;
+		}
+
+		bool operator<(const MyLayer &layer2) const {
+			if (print_z < layer2.print_z) {
+				return true;
+			} else if (print_z == layer2.print_z) {
+			 	if (height > layer2.height)
+			 		return true;
+			 	else if (height == layer2.height) {
+			 	 	return bridging < layer2.bridging;
+			 	} else
+			 		return false;
+			} else
+				return false;
+		}
+
+		SupporLayerType layer_type;
+		// Z used for printing in unscaled coordinates
+		coordf_t print_z;
+		// Bottom height of this layer. For soluble layers, bottom_z + height = print_z,
+		// otherwise bottom_z + gap + height = print_z.
+		coordf_t bottom_z;
+		// layer height in unscaled coordinates
+    	coordf_t height;
+    	// Index of a PrintObject layer_id supported by this layer. This will be set for top contact layers.
+    	// If this is not a contact layer, it will be set to size_t(-1).
+    	size_t 	 idx_object_layer_above;
+    	// Index of a PrintObject layer_id, which supports this layer. This will be set for bottom contact layers.
+    	// If this is not a contact layer, it will be set to size_t(-1).
+    	size_t 	 idx_object_layer_below;
+    	// Use a bridging flow when printing this support layer.
+    	bool 	 bridging;
+
+    	// Polygons to be filled by the support pattern.
+    	Polygons polygons;
+    	// Currently for the contact layers only: Overhangs are stored here.
+    	Polygons *aux_polygons;
+	};
+
+	struct LayerExtreme
+	{
+		LayerExtreme(MyLayer *alayer, bool ais_top) : layer(alayer), is_top(ais_top) {}
+		MyLayer 	*layer;
+		// top or bottom extreme
+		bool   		 is_top;
+
+		coordf_t	z() const { return is_top ? layer->print_z : layer->print_z - height; }
+
+		bool operator<(const LayerExtreme &other) const { return z() < other.z(); }
+	}
+
+	struct LayerPrintZ_Hash {
+		static size_t operator(const MyLayer &layer) { 
+			return std::hash<double>(layer.print_z)^std::hash<double>(layer.height)^size_t(layer.bridging);
+		}
+	};
+
+	typedef std::set<MyLayer, LayerPrintZ_Hash> MyLayersSet;
+	typedef std::vector<Layer*> 				MyLayersPtr;
+	typedef std::deque<Layer> 					MyLayersDeque;
+	typedef std::deque<Layer> 					MyLayerStorage;
+
+public:
+	PrintSupportMaterial() :
+		m_object(NULL),
+		m_print_config(NULL),
+		m_object_config(NULL),
+		m_soluble_interface(false),
+		m_support_layer_height_max(0.),
+		m_support_interface_layer_height_max(0.)
+	{}
+
+	void setup(
+		const PrintConfig 	*print_config;
+		const ObjectConfig 	*object_config;
+		Flow 			 	 flow;
+		Flow 			 	 first_layer_flow;
+		Flow 			 	 interface_flow;
+		bool 			 	 soluble_interface)
+	{
+		this->m_object 				= object;
+		this->m_print_config 		= print_config;
+		this->m_object_config 		= object_config;
+		this->m_flow 				= flow;
+		this->m_first_layer_flow 	= first_layer_flow;
+		this->m_interface_flow 		= interface_flow;
+		this->m_soluble_interface 	= soluble_interface;
+	}
+
+	void generate(const PrintObject *object);
+
+private:
+	// Generate top contact layers supporting overhangs.
+	// For a soluble interface material synchronize the layer heights with the object, otherwise leave the layer height undefined.
+	// If supports over bed surface only are requested, don't generate contact layers over an object.
+	MyLayersPtr top_contact_layers(const PrintObject &object, MyLayerStorage &layer_storage) const;
+
+	// Generate bottom contact layers supporting the top contact layers.
+	// For a soluble interface material synchronize the layer heights with the object, 
+	// otherwise set the layer height to a bridging flow of a support interface nozzle.
+	MyLayersPtr bottom_contact_layers(const PrintObject &object, const MyLayersPtr &top_contacts, MyLayerStorage &layer_storage) const;
+
+	// Generate raft layers and the intermediate support layers between the bottom contact and top contact surfaces.
+	MyLayersPtr raft_and_intermediate_support_layers(
+	    const PrintObject   &object,
+	    const MyLayersPtr   &bottom_contacts,
+	    const MyLayersPtr   &top_contacts,
+	    MyLayerStorage	 	&layer_storage,
+	    const coordf_t       max_object_layer_height);
+
+	void generate_base_layers(
+	    const PrintObject   &object,
+	    const MyLayersPtr   &bottom_contacts,
+	    const MyLayersPtr   &top_contacts,
+	    MyLayersPtr         &intermediate_layers);
+
+	MyLayersPtr generate_interface_layers(
+	    const PrintObject   &object,
+	    const MyLayersPtr   &bottom_contacts,
+	    const MyLayersPtr   &top_contacts,
+	    MyLayersPtr         &intermediate_layers,
+	    MyLayerStorage      &layer_storage);
+
+/*
+	void generate_pillars_shape();
+	void clip_with_shape();
+*/
+
+	// Produce the actual G-code.
+	void generate_toolpaths(
+        const PrintObject   &object,
+        const MyLayersPtr   &bottom_contacts,
+        const MyLayersPtr   &top_contacts,
+        const MyLayersPtr   &intermediate_layers,
+        const MyLayersPtr   &interface_layers);
+
+	const PrintConfig 	*m_print_config;
+	const ObjectConfig 	*m_object_config;
+	Flow 			 	 m_flow;
+	Flow 			 	 m_first_layer_flow;
+	Flow 			 	 m_interface_flow;
+	bool 			 	 m_soluble_interface;
+
+	coordf_t		 	 m_support_layer_height_max;
+	coordf_t		 	 m_support_interface_layer_height_max;
+};
 
 #endif