Slic3r::Arachne::WideningBeadingStrategy Class Reference

#include </home/runner/work/OrcaSlicer/OrcaSlicer/src/libslic3r/Arachne/BeadingStrategy/WideningBeadingStrategy.hpp>

Inheritance diagram for Slic3r::Arachne::WideningBeadingStrategy:

Collaboration diagram for Slic3r::Arachne::WideningBeadingStrategy:

Public Member Functions
	WideningBeadingStrategy (BeadingStrategyPtr parent, coord_t min_input_width, coord_t min_output_width)
	~WideningBeadingStrategy () override=default
Beading	compute (coord_t thickness, coord_t bead_count) const override
coord_t	getOptimalThickness (coord_t bead_count) const override
coord_t	getTransitionThickness (coord_t lower_bead_count) const override
coord_t	getOptimalBeadCount (coord_t thickness) const override
coord_t	getTransitioningLength (coord_t lower_bead_count) const override
float	getTransitionAnchorPos (coord_t lower_bead_count) const override
std::vector< coord_t >	getNonlinearThicknesses (coord_t lower_bead_count) const override
std::string	toString () const override
double	getSplitMiddleThreshold () const
double	getTransitioningAngle () const

Protected Attributes
BeadingStrategyPtr	parent
const coord_t	min_input_width
const coord_t	min_output_width
std::string	name
coord_t	optimal_width
double	wall_split_middle_threshold
	Optimal bead width, nominal width off the walls in 'ideal' circumstances.
double	wall_add_middle_threshold
	Threshold when a middle wall should be split into two, as a ratio of the optimal wall width.
coord_t	default_transition_length
	Threshold when a new middle wall should be added between an even number of walls, as a ratio of the optimal wall width.
double	transitioning_angle
	The length of the region to smoothly transfer between bead counts.

Detailed Description

This is a meta-strategy that can be applied on any other beading strategy. If the part is thinner than a single line, this strategy adjusts the part so that it becomes the minimum thickness of one line.

This way, tiny pieces that are smaller than a single line will still be printed.

Constructor & Destructor Documentation

WideningBeadingStrategy()

Slic3r::Arachne::WideningBeadingStrategy::WideningBeadingStrategy	(	BeadingStrategyPtr	parent,
		coord_t	min_input_width,
		coord_t	min_output_width )

Takes responsibility for deleting

Parameters

parent

    : BeadingStrategy(*parent)
    , parent(std::move(parent))
    , min_input_width(min_input_width)
    , min_output_width(min_output_width)
{
}

References Slic3r::Arachne::BeadingStrategy::BeadingStrategy(), min_input_width, min_output_width, and parent.

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~WideningBeadingStrategy()

Slic3r::Arachne::WideningBeadingStrategy::~WideningBeadingStrategy ( )

overridedefault

Member Function Documentation

compute()

WideningBeadingStrategy::Beading Slic3r::Arachne::WideningBeadingStrategy::compute ( coord_t thickness, coord_t bead_count ) const

overridevirtual

Retrieve the bead widths with which to cover a given thickness.

Requirement: Given a constant bead_count the output of each bead width must change gradually along with the thickness.

Note

The bead_count might be different from the BeadingStrategy::optimal_bead_count

Implements Slic3r::Arachne::BeadingStrategy.

{
    // Use getTransitionThickness(1) to determine if this is a thin wall that should produce
    // a single bead. This ensures consistency with getOptimalBeadCount() which uses the same
    // threshold (via RedistributeBeadingStrategy) to decide between 1 and 2 beads.
    // Previously used optimal_width which could differ from the outer wall width used in
    // bead count calculations, causing inconsistency where bead_count=2 was requested but
    // only 1 bead was produced.
    //
    // Orca #14376: only collapse to a single bead when at most one bead is requested. This
    // branch emits one bead at the full wall thickness, so honoring it when bead_count >= 2
    // (which happens inside 1<->2 transition bands) produces an over-wide extrusion that shows
    // up as a surface bulge. Deferring to the parent keeps the requested two beads and also
    // keeps compute() consistent with the bead count the skeletal graph asked for.
    if (bead_count <= 1 && thickness < getTransitionThickness(1)) {
        Beading ret;
        ret.total_thickness = thickness;
        if (thickness >= min_input_width) {
            ret.bead_widths.emplace_back(std::max(thickness, min_output_width));
            ret.toolpath_locations.emplace_back(thickness / 2);
            ret.left_over = 0;
        } else
            ret.left_over = thickness;
 
        return ret;
    } else
        return parent->compute(thickness, bead_count);
}

References Slic3r::Arachne::BeadingStrategy::Beading::bead_widths, getTransitionThickness(), Slic3r::Arachne::BeadingStrategy::Beading::left_over, min_input_width, min_output_width, parent, Slic3r::Arachne::BeadingStrategy::Beading::toolpath_locations, and Slic3r::Arachne::BeadingStrategy::Beading::total_thickness.

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getNonlinearThicknesses()

std::vector< coord_t > Slic3r::Arachne::WideningBeadingStrategy::getNonlinearThicknesses ( coord_t lower_bead_count ) const

overridevirtual

Get the locations in a bead count region where BeadingStrategy::compute exhibits a bend in the widths. Ordered from lower thickness to higher.

This is used to insert extra support bones into the skeleton, so that the resulting beads in long trapezoids don't linearly change between the two ends.

Reimplemented from Slic3r::Arachne::BeadingStrategy.

{
    std::vector<coord_t> ret;
    ret.emplace_back(min_output_width);
    std::vector<coord_t> pret = parent->getNonlinearThicknesses(lower_bead_count);
    ret.insert(ret.end(), pret.begin(), pret.end());
    return ret;
}

References min_output_width, and parent.

getOptimalBeadCount()

coord_t Slic3r::Arachne::WideningBeadingStrategy::getOptimalBeadCount ( coord_t thickness ) const

overridevirtual

The number of beads should we ideally usefor a given model thickness

Implements Slic3r::Arachne::BeadingStrategy.

{
    if (thickness < min_input_width)
        return 0;
    coord_t ret = parent->getOptimalBeadCount(thickness);
    if (thickness >= min_input_width && ret < 1)
        return 1;
    return ret;
}

References min_input_width, and parent.

getOptimalThickness()

coord_t Slic3r::Arachne::WideningBeadingStrategy::getOptimalThickness ( coord_t bead_count ) const

overridevirtual

The ideal thickness for a given

Parameters

bead_count

Reimplemented from Slic3r::Arachne::BeadingStrategy.

{
    return parent->getOptimalThickness(bead_count);
}

References parent.

getSplitMiddleThreshold()

double Slic3r::Arachne::BeadingStrategy::getSplitMiddleThreshold ( ) const

inherited

{
    return wall_split_middle_threshold;
}

References wall_split_middle_threshold.

getTransitionAnchorPos()

float Slic3r::Arachne::WideningBeadingStrategy::getTransitionAnchorPos ( coord_t lower_bead_count ) const

overridevirtual

The fraction of the transition length to put between the lower end of the transition and the point where the unsmoothed bead count jumps.

Transitions are used to smooth out the jumps in integer bead count; the jumps turn into ramps which could be positioned relative to the jump location.

Reimplemented from Slic3r::Arachne::BeadingStrategy.

{
    return parent->getTransitionAnchorPos(lower_bead_count);
}

References parent.

getTransitioningAngle()

double Slic3r::Arachne::BeadingStrategy::getTransitioningAngle ( ) const

inherited

{
    return transitioning_angle;
}

References transitioning_angle.

getTransitioningLength()

coord_t Slic3r::Arachne::WideningBeadingStrategy::getTransitioningLength ( coord_t lower_bead_count ) const

overridevirtual

The length of the transitioning region along the marked / significant regions of the skeleton.

Transitions are used to smooth out the jumps in integer bead count; the jumps turn into ramps with some incline defined by their length.

Reimplemented from Slic3r::Arachne::BeadingStrategy.

{
    return parent->getTransitioningLength(lower_bead_count);
}

References parent.

getTransitionThickness()

coord_t Slic3r::Arachne::WideningBeadingStrategy::getTransitionThickness ( coord_t lower_bead_count ) const

overridevirtual

The model thickness at which BeadingStrategy::optimal_bead_count transitions from lower_bead_count to lower_bead_count + 1

Reimplemented from Slic3r::Arachne::BeadingStrategy.

{
    if (lower_bead_count == 0)
        return min_input_width;
    else
        return parent->getTransitionThickness(lower_bead_count);
}

References min_input_width, and parent.

Referenced by compute().

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toString()

std::string Slic3r::Arachne::WideningBeadingStrategy::toString ( ) const

overridevirtual

Reimplemented from Slic3r::Arachne::BeadingStrategy.

{
    return std::string("Widening+") + parent->toString();
}

References parent.

Member Data Documentation

default_transition_length

coord_t Slic3r::Arachne::BeadingStrategy::default_transition_length

protectedinherited

Threshold when a new middle wall should be added between an even number of walls, as a ratio of the optimal wall width.

Referenced by BeadingStrategy(), BeadingStrategy(), Slic3r::Arachne::DistributedBeadingStrategy::DistributedBeadingStrategy(), and getTransitioningLength().

min_input_width

const coord_t Slic3r::Arachne::WideningBeadingStrategy::min_input_width

protected

Referenced by WideningBeadingStrategy(), compute(), getOptimalBeadCount(), and getTransitionThickness().

min_output_width

const coord_t Slic3r::Arachne::WideningBeadingStrategy::min_output_width

protected

Referenced by WideningBeadingStrategy(), compute(), and getNonlinearThicknesses().

name

std::string Slic3r::Arachne::BeadingStrategy::name

protectedinherited

Referenced by BeadingStrategy(), BeadingStrategy(), Slic3r::Arachne::DistributedBeadingStrategy::DistributedBeadingStrategy(), Slic3r::Arachne::OuterWallInsetBeadingStrategy::OuterWallInsetBeadingStrategy(), Slic3r::Arachne::RedistributeBeadingStrategy::RedistributeBeadingStrategy(), and toString().

optimal_width

coord_t Slic3r::Arachne::BeadingStrategy::optimal_width

protectedinherited

Referenced by BeadingStrategy(), BeadingStrategy(), Slic3r::Arachne::DistributedBeadingStrategy::DistributedBeadingStrategy(), Slic3r::Arachne::DistributedBeadingStrategy::compute(), Slic3r::Arachne::DistributedBeadingStrategy::getOptimalBeadCount(), and getOptimalThickness().

parent

BeadingStrategyPtr Slic3r::Arachne::WideningBeadingStrategy::parent

protected

Referenced by WideningBeadingStrategy(), compute(), getNonlinearThicknesses(), getOptimalBeadCount(), getOptimalThickness(), getTransitionAnchorPos(), getTransitioningLength(), getTransitionThickness(), and toString().

transitioning_angle

double Slic3r::Arachne::BeadingStrategy::transitioning_angle

protectedinherited

The length of the region to smoothly transfer between bead counts.

The maximum angle between outline segments smaller than which we are going to add transitions Equals 180 - the "limit bisector angle" from the paper

Referenced by BeadingStrategy(), BeadingStrategy(), Slic3r::Arachne::DistributedBeadingStrategy::DistributedBeadingStrategy(), and getTransitioningAngle().

wall_add_middle_threshold

double Slic3r::Arachne::BeadingStrategy::wall_add_middle_threshold

protectedinherited

Threshold when a middle wall should be split into two, as a ratio of the optimal wall width.

Referenced by BeadingStrategy(), BeadingStrategy(), Slic3r::Arachne::DistributedBeadingStrategy::DistributedBeadingStrategy(), Slic3r::Arachne::DistributedBeadingStrategy::getOptimalBeadCount(), and getTransitionThickness().

wall_split_middle_threshold

double Slic3r::Arachne::BeadingStrategy::wall_split_middle_threshold

protectedinherited

Optimal bead width, nominal width off the walls in 'ideal' circumstances.

Referenced by BeadingStrategy(), BeadingStrategy(), Slic3r::Arachne::DistributedBeadingStrategy::DistributedBeadingStrategy(), Slic3r::Arachne::DistributedBeadingStrategy::getOptimalBeadCount(), getSplitMiddleThreshold(), and getTransitionThickness().

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The documentation for this class was generated from the following files:

• /home/runner/work/OrcaSlicer/OrcaSlicer/src/libslic3r/Arachne/BeadingStrategy/WideningBeadingStrategy.hpp
• /home/runner/work/OrcaSlicer/OrcaSlicer/src/libslic3r/Arachne/BeadingStrategy/WideningBeadingStrategy.cpp