WIP Tree Supports: Refactored the classic FDM support generator
for modularity, so that the rasterization of support layers is accessible from tree supports.
This commit is contained in:
Vojtech Bubnik
parent
23099c83dc
commit
075bf675fa
File diff suppressed because it is too large
Load Diff
@ -11,147 +11,162 @@ class PrintObject;
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class PrintConfig;
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class PrintObjectConfig;
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// Support layer type to be used by SupportGeneratorLayer. This type carries a much more detailed information
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// about the support layer type than the final support layers stored in a PrintObject.
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enum SupporLayerType {
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Unknown = 0,
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// Ratft base layer, to be printed with the support material.
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RaftBase,
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// Raft interface layer, to be printed with the support interface material.
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RaftInterface,
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// Bottom contact layer placed over a top surface of an object. To be printed with a support interface material.
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BottomContact,
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// Dense interface layer, to be printed with the support interface material.
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// This layer is separated from an object by an BottomContact layer.
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BottomInterface,
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// Sparse base support layer, to be printed with a support material.
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Base,
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// Dense interface layer, to be printed with the support interface material.
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// This layer is separated from an object with TopContact layer.
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TopInterface,
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// Top contact layer directly supporting an overhang. To be printed with a support interface material.
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TopContact,
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// Some undecided type yet. It will turn into Base first, then it may turn into BottomInterface or TopInterface.
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Intermediate,
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};
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// A support layer type used internally by the SupportMaterial class. This class carries a much more detailed
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// information about the support layer than the layers stored in the PrintObject, mainly
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// the SupportGeneratorLayer is aware of the bridging flow and the interface gaps between the object and the support.
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class SupportGeneratorLayer
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{
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public:
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void reset() {
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*this = SupportGeneratorLayer();
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}
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bool operator==(const SupportGeneratorLayer &layer2) const {
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return print_z == layer2.print_z && height == layer2.height && bridging == layer2.bridging;
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}
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// Order the layers by lexicographically by an increasing print_z and a decreasing layer height.
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bool operator<(const SupportGeneratorLayer &layer2) const {
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if (print_z < layer2.print_z) {
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return true;
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} else if (print_z == layer2.print_z) {
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if (height > layer2.height)
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return true;
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else if (height == layer2.height) {
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// Bridging layers first.
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return bridging && ! layer2.bridging;
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} else
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return false;
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} else
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return false;
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}
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void merge(SupportGeneratorLayer &&rhs) {
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// The union_() does not support move semantic yet, but maybe one day it will.
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this->polygons = union_(this->polygons, std::move(rhs.polygons));
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auto merge = [](std::unique_ptr<Polygons> &dst, std::unique_ptr<Polygons> &src) {
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if (! dst || dst->empty())
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dst = std::move(src);
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else if (src && ! src->empty())
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*dst = union_(*dst, std::move(*src));
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};
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merge(this->contact_polygons, rhs.contact_polygons);
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merge(this->overhang_polygons, rhs.overhang_polygons);
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merge(this->enforcer_polygons, rhs.enforcer_polygons);
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rhs.reset();
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}
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// For the bridging flow, bottom_print_z will be above bottom_z to account for the vertical separation.
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// For the non-bridging flow, bottom_print_z will be equal to bottom_z.
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coordf_t bottom_print_z() const { return print_z - height; }
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// To sort the extremes of top / bottom interface layers.
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coordf_t extreme_z() const { return (this->layer_type == SupporLayerType::TopContact) ? this->bottom_z : this->print_z; }
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SupporLayerType layer_type { SupporLayerType::Unknown };
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// Z used for printing, in unscaled coordinates.
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coordf_t print_z { 0 };
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// Bottom Z of this layer. For soluble layers, bottom_z + height = print_z,
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// otherwise bottom_z + gap + height = print_z.
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coordf_t bottom_z { 0 };
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// Layer height in unscaled coordinates.
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coordf_t height { 0 };
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// Index of a PrintObject layer_id supported by this layer. This will be set for top contact layers.
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// If this is not a contact layer, it will be set to size_t(-1).
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size_t idx_object_layer_above { size_t(-1) };
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// Index of a PrintObject layer_id, which supports this layer. This will be set for bottom contact layers.
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// If this is not a contact layer, it will be set to size_t(-1).
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size_t idx_object_layer_below { size_t(-1) };
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// Use a bridging flow when printing this support layer.
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bool bridging { false };
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// Polygons to be filled by the support pattern.
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Polygons polygons;
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// Currently for the contact layers only.
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std::unique_ptr<Polygons> contact_polygons;
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std::unique_ptr<Polygons> overhang_polygons;
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// Enforcers need to be propagated independently in case the "support on build plate only" option is enabled.
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std::unique_ptr<Polygons> enforcer_polygons;
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};
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// Layers are allocated and owned by a deque. Once a layer is allocated, it is maintained
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// up to the end of a generate() method. The layer storage may be replaced by an allocator class in the future,
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// which would allocate layers by multiple chunks.
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using SupportGeneratorLayerStorage = std::deque<SupportGeneratorLayer>;
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using SupportGeneratorLayersPtr = std::vector<SupportGeneratorLayer*>;
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struct SupportParameters {
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SupportParameters(const PrintObject &object);
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Flow first_layer_flow;
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Flow support_material_flow;
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Flow support_material_interface_flow;
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Flow support_material_bottom_interface_flow;
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// Is merging of regions allowed? Could the interface & base support regions be printed with the same extruder?
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bool can_merge_support_regions;
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coordf_t support_layer_height_min;
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// coordf_t support_layer_height_max;
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coordf_t gap_xy;
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float base_angle;
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float interface_angle;
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coordf_t interface_spacing;
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coordf_t interface_density;
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coordf_t support_spacing;
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coordf_t support_density;
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InfillPattern base_fill_pattern;
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InfillPattern interface_fill_pattern;
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InfillPattern contact_fill_pattern;
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bool with_sheath;
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};
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// Produce the support G-code.
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// Used by both classic and tree supports.
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static void generate_support_toolpaths(
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SupportLayerPtrs &support_layers,
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const PrintObjectConfig &config,
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const SupportParameters &support_params,
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const SlicingParameters &slicing_params,
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const SupportGeneratorLayersPtr &raft_layers,
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const SupportGeneratorLayersPtr &bottom_contacts,
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const SupportGeneratorLayersPtr &top_contacts,
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const SupportGeneratorLayersPtr &intermediate_layers,
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const SupportGeneratorLayersPtr &interface_layers,
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const SupportGeneratorLayersPtr &base_interface_layers);
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// This class manages raft and supports for a single PrintObject.
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// Instantiated by Slic3r::Print::Object->_support_material()
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// This class is instantiated before the slicing starts as Object.pm will query
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// the parameters of the raft to determine the 1st layer height and thickness.
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class PrintObjectSupportMaterial
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{
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public:
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// Support layer type to be used by MyLayer. This type carries a much more detailed information
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// about the support layer type than the final support layers stored in a PrintObject.
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enum SupporLayerType {
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sltUnknown = 0,
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// Ratft base layer, to be printed with the support material.
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sltRaftBase,
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// Raft interface layer, to be printed with the support interface material.
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sltRaftInterface,
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// Bottom contact layer placed over a top surface of an object. To be printed with a support interface material.
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sltBottomContact,
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// Dense interface layer, to be printed with the support interface material.
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// This layer is separated from an object by an sltBottomContact layer.
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sltBottomInterface,
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// Sparse base support layer, to be printed with a support material.
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sltBase,
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// Dense interface layer, to be printed with the support interface material.
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// This layer is separated from an object with sltTopContact layer.
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sltTopInterface,
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// Top contact layer directly supporting an overhang. To be printed with a support interface material.
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sltTopContact,
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// Some undecided type yet. It will turn into sltBase first, then it may turn into sltBottomInterface or sltTopInterface.
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sltIntermediate,
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};
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// A support layer type used internally by the SupportMaterial class. This class carries a much more detailed
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// information about the support layer than the layers stored in the PrintObject, mainly
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// the MyLayer is aware of the bridging flow and the interface gaps between the object and the support.
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class MyLayer
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{
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public:
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void reset() {
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*this = MyLayer();
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}
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bool operator==(const MyLayer &layer2) const {
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return print_z == layer2.print_z && height == layer2.height && bridging == layer2.bridging;
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}
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// Order the layers by lexicographically by an increasing print_z and a decreasing layer height.
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bool operator<(const MyLayer &layer2) const {
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if (print_z < layer2.print_z) {
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return true;
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} else if (print_z == layer2.print_z) {
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if (height > layer2.height)
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return true;
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else if (height == layer2.height) {
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// Bridging layers first.
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return bridging && ! layer2.bridging;
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} else
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return false;
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} else
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return false;
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}
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void merge(MyLayer &&rhs) {
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// The union_() does not support move semantic yet, but maybe one day it will.
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this->polygons = union_(this->polygons, std::move(rhs.polygons));
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auto merge = [](std::unique_ptr<Polygons> &dst, std::unique_ptr<Polygons> &src) {
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if (! dst || dst->empty())
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dst = std::move(src);
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else if (src && ! src->empty())
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*dst = union_(*dst, std::move(*src));
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};
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merge(this->contact_polygons, rhs.contact_polygons);
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merge(this->overhang_polygons, rhs.overhang_polygons);
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merge(this->enforcer_polygons, rhs.enforcer_polygons);
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rhs.reset();
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}
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// For the bridging flow, bottom_print_z will be above bottom_z to account for the vertical separation.
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// For the non-bridging flow, bottom_print_z will be equal to bottom_z.
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coordf_t bottom_print_z() const { return print_z - height; }
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// To sort the extremes of top / bottom interface layers.
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coordf_t extreme_z() const { return (this->layer_type == sltTopContact) ? this->bottom_z : this->print_z; }
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SupporLayerType layer_type { sltUnknown };
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// Z used for printing, in unscaled coordinates.
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coordf_t print_z { 0 };
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// Bottom Z of this layer. For soluble layers, bottom_z + height = print_z,
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// otherwise bottom_z + gap + height = print_z.
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coordf_t bottom_z { 0 };
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// Layer height in unscaled coordinates.
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coordf_t height { 0 };
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// Index of a PrintObject layer_id supported by this layer. This will be set for top contact layers.
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// If this is not a contact layer, it will be set to size_t(-1).
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size_t idx_object_layer_above { size_t(-1) };
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// Index of a PrintObject layer_id, which supports this layer. This will be set for bottom contact layers.
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// If this is not a contact layer, it will be set to size_t(-1).
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size_t idx_object_layer_below { size_t(-1) };
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// Use a bridging flow when printing this support layer.
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bool bridging { false };
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// Polygons to be filled by the support pattern.
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Polygons polygons;
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// Currently for the contact layers only.
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std::unique_ptr<Polygons> contact_polygons;
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std::unique_ptr<Polygons> overhang_polygons;
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// Enforcers need to be propagated independently in case the "support on build plate only" option is enabled.
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std::unique_ptr<Polygons> enforcer_polygons;
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};
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struct SupportParams {
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Flow first_layer_flow;
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Flow support_material_flow;
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Flow support_material_interface_flow;
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Flow support_material_bottom_interface_flow;
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// Is merging of regions allowed? Could the interface & base support regions be printed with the same extruder?
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bool can_merge_support_regions;
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coordf_t support_layer_height_min;
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// coordf_t support_layer_height_max;
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coordf_t gap_xy;
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float base_angle;
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float interface_angle;
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coordf_t interface_spacing;
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coordf_t interface_density;
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coordf_t support_spacing;
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coordf_t support_density;
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InfillPattern base_fill_pattern;
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InfillPattern interface_fill_pattern;
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InfillPattern contact_fill_pattern;
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bool with_sheath;
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};
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// Layers are allocated and owned by a deque. Once a layer is allocated, it is maintained
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// up to the end of a generate() method. The layer storage may be replaced by an allocator class in the future,
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// which would allocate layers by multiple chunks.
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typedef std::deque<MyLayer> MyLayerStorage;
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typedef std::vector<MyLayer*> MyLayersPtr;
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public:
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PrintObjectSupportMaterial(const PrintObject *object, const SlicingParameters &slicing_params);
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@ -175,58 +190,58 @@ private:
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// Generate top contact layers supporting overhangs.
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// For a soluble interface material synchronize the layer heights with the object, otherwise leave the layer height undefined.
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// If supports over bed surface only are requested, don't generate contact layers over an object.
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MyLayersPtr top_contact_layers(const PrintObject &object, const std::vector<Polygons> &buildplate_covered, MyLayerStorage &layer_storage) const;
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SupportGeneratorLayersPtr top_contact_layers(const PrintObject &object, const std::vector<Polygons> &buildplate_covered, SupportGeneratorLayerStorage &layer_storage) const;
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// Generate bottom contact layers supporting the top contact layers.
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// For a soluble interface material synchronize the layer heights with the object,
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// otherwise set the layer height to a bridging flow of a support interface nozzle.
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MyLayersPtr bottom_contact_layers_and_layer_support_areas(
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const PrintObject &object, const MyLayersPtr &top_contacts, std::vector<Polygons> &buildplate_covered,
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MyLayerStorage &layer_storage, std::vector<Polygons> &layer_support_areas) const;
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SupportGeneratorLayersPtr bottom_contact_layers_and_layer_support_areas(
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const PrintObject &object, const SupportGeneratorLayersPtr &top_contacts, std::vector<Polygons> &buildplate_covered,
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SupportGeneratorLayerStorage &layer_storage, std::vector<Polygons> &layer_support_areas) const;
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// Trim the top_contacts layers with the bottom_contacts layers if they overlap, so there would not be enough vertical space for both of them.
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void trim_top_contacts_by_bottom_contacts(const PrintObject &object, const MyLayersPtr &bottom_contacts, MyLayersPtr &top_contacts) const;
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void trim_top_contacts_by_bottom_contacts(const PrintObject &object, const SupportGeneratorLayersPtr &bottom_contacts, SupportGeneratorLayersPtr &top_contacts) const;
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// Generate raft layers and the intermediate support layers between the bottom contact and top contact surfaces.
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MyLayersPtr raft_and_intermediate_support_layers(
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SupportGeneratorLayersPtr raft_and_intermediate_support_layers(
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const PrintObject &object,
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const MyLayersPtr &bottom_contacts,
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const MyLayersPtr &top_contacts,
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MyLayerStorage &layer_storage) const;
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const SupportGeneratorLayersPtr &bottom_contacts,
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const SupportGeneratorLayersPtr &top_contacts,
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SupportGeneratorLayerStorage &layer_storage) const;
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// Fill in the base layers with polygons.
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void generate_base_layers(
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const PrintObject &object,
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const MyLayersPtr &bottom_contacts,
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const MyLayersPtr &top_contacts,
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MyLayersPtr &intermediate_layers,
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const SupportGeneratorLayersPtr &bottom_contacts,
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const SupportGeneratorLayersPtr &top_contacts,
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SupportGeneratorLayersPtr &intermediate_layers,
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const std::vector<Polygons> &layer_support_areas) const;
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// Generate raft layers, also expand the 1st support layer
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// in case there is no raft layer to improve support adhesion.
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MyLayersPtr generate_raft_base(
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SupportGeneratorLayersPtr generate_raft_base(
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const PrintObject &object,
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const MyLayersPtr &top_contacts,
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const MyLayersPtr &interface_layers,
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const MyLayersPtr &base_interface_layers,
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const MyLayersPtr &base_layers,
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MyLayerStorage &layer_storage) const;
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const SupportGeneratorLayersPtr &top_contacts,
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const SupportGeneratorLayersPtr &interface_layers,
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const SupportGeneratorLayersPtr &base_interface_layers,
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const SupportGeneratorLayersPtr &base_layers,
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SupportGeneratorLayerStorage &layer_storage) const;
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// Turn some of the base layers into base interface layers.
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// For soluble interfaces with non-soluble bases, print maximum two first interface layers with the base
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// extruder to improve adhesion of the soluble filament to the base.
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std::pair<MyLayersPtr, MyLayersPtr> generate_interface_layers(
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const MyLayersPtr &bottom_contacts,
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const MyLayersPtr &top_contacts,
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MyLayersPtr &intermediate_layers,
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MyLayerStorage &layer_storage) const;
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std::pair<SupportGeneratorLayersPtr, SupportGeneratorLayersPtr> generate_interface_layers(
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const SupportGeneratorLayersPtr &bottom_contacts,
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const SupportGeneratorLayersPtr &top_contacts,
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SupportGeneratorLayersPtr &intermediate_layers,
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SupportGeneratorLayerStorage &layer_storage) const;
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// Trim support layers by an object to leave a defined gap between
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// the support volume and the object.
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void trim_support_layers_by_object(
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const PrintObject &object,
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MyLayersPtr &support_layers,
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SupportGeneratorLayersPtr &support_layers,
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const coordf_t gap_extra_above,
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const coordf_t gap_extra_below,
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const coordf_t gap_xy) const;
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@ -236,16 +251,6 @@ private:
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void clip_with_shape();
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*/
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// Produce the actual G-code.
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void generate_toolpaths(
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SupportLayerPtrs &support_layers,
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const MyLayersPtr &raft_layers,
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const MyLayersPtr &bottom_contacts,
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const MyLayersPtr &top_contacts,
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const MyLayersPtr &intermediate_layers,
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const MyLayersPtr &interface_layers,
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const MyLayersPtr &base_interface_layers) const;
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// Following objects are not owned by SupportMaterial class.
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const PrintObject *m_object;
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const PrintConfig *m_print_config;
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@ -254,7 +259,7 @@ private:
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// carrying information on a raft, 1st layer height, 1st object layer height, gap between the raft and object etc.
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SlicingParameters m_slicing_params;
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// Various precomputed support parameters to be shared with external functions.
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SupportParams m_support_params;
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SupportParameters m_support_params;
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};
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} // namespace Slic3r
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