ON_SubDHash provides a simple way to save a SubD's vertex, edge, and face SHA1 hashes. Typically it is used when a calculation needs to know if the current SubD has is geometrically identical to a previous SubD. When speed is not important, comparing the current value of ON_SubD::GeometryHash() to a previously save value of ON_SubD::GeometryHash() is functionally identical but typically much slower when the SubDs are different. More...

#include <opennurbs_subd.h>

Public Member Functions
	ON_SubDEdgeSharpness ()=default

	ON_SubDEdgeSharpness (const ON_SubDEdgeSharpness &)=default

	~ON_SubDEdgeSharpness ()=default

double	Average () const
	Return the average of the sharpness interval. More...

double	Delta () const

double	EndSharpness (int end_index) const
	Get the sharpness at the start or end. More...

bool	IsConstant () const

bool	IsConstant (bool bCreaseResult) const

bool	IsCrease () const

bool	IsCreaseOrSharp () const

bool	IsDecreasing () const

bool	IsIncreasing () const

bool	IsNotValid () const

bool	IsNotValid (bool bCreaseResult) const

bool	IsSharp () const

bool	IsValid () const

bool	IsValid (bool bCreaseResult) const

bool	IsVariable () const

bool	IsZero () const
	Returns True if the sharpness is zero. More...

double	MaximumEndSharpness () const
	Return the maximum of the sharpness interval. More...

double	MinimumEndSharpness () const
	Return the minimum of the sharpness interval. More...

ON_SubDEdgeSharpness &	operator= (const ON_SubDEdgeSharpness &)=default

double	operator[] (int end_index) const
	Get the edge sharpness at the start or end. More...

const ON_SubDEdgeSharpness	Reversed () const

const ON_SubDEdgeSharpness	Subdivided (int end_index) const
	Sharpness value for a subdivided edge. More...

const ON_wString	ToPercentageText (bool bOrderMinToMax) const
	Create a text string describing the sharpness as a percentage. If the sharpness is constant, and single percentage is returned. If the sharpness is variable, percentage range returned. If the sharpness is not valid, a warning sign is returned. More...

int	Trend () const

Static Public Member Functions
static bool	EqualDelta (const class ON_SubDEdgePtr &eptr0, const class ON_SubDEdgePtr &eptr1)
	Determine if edges are adjacent, have the same sharpness trend, and equal adjacent sharpness values. More...

static bool	EqualDelta (ON_SubDEdgeSharpness s0, ON_SubDEdgeSharpness s1)

static bool	EqualEndSharpness (const class ON_SubDEdgePtr &eptr0, const class ON_SubDEdgePtr &eptr1)
	Determine if edges are adjacent and have equal adjacent sharpness values. More...

static bool	EqualEndSharpness (ON_SubDEdgeSharpness s0, ON_SubDEdgeSharpness s1)

static bool	EqualTrend (const class ON_SubDEdgePtr &eptr0, const class ON_SubDEdgePtr &eptr1)
	Determine if edges are adjacent, have the same sharpness trend, and equal adjacent sharpness values. More...

static bool	EqualTrend (ON_SubDEdgeSharpness s0, ON_SubDEdgeSharpness s1)

static const ON_SubDEdgeSharpness	FromConstant (double sharpness)
	Create a constant ON_SubDEdgeSharpness; More...

static const ON_SubDEdgeSharpness	FromInterval (const class ON_Interval &sharpness_interval)
	Create a variable ON_SubDEdgeSharpness; More...

static const ON_SubDEdgeSharpness	FromInterval (double sharpness0, double sharpness1)
	Create a variable ON_SubDEdgeSharpness; More...

static bool	IsConstant (const ON_SimpleArray< ON_SubDEdgePtr > &edges, bool bCreaseResult)
	Determine if all the input edges have idential constant sharpeness. More...

static bool	IsConstant (size_t edge_count, const ON_SubDEdgePtr *edges, bool bCreaseResult)
	Determine if all the input edges have idential constant sharpeness. More...

static bool	IsValidValue (double candidate_value, bool bCreaseResult)
	Determine if candidate_value is a valid edge end sharpness value. More...

static double	Sanitize (double sharpness)
	Verify 0 <= sharpness <= ON_SubDEdgeSharpness::MaximumValue and return an integer value when the input sharpenss is within ON_SubDEdgeSharpness::Tolerance of an integer. More...

static double	Sanitize (double sharpness, double invalid_input_result)
	Verify 0 <= sharpness <= ON_SubDEdgeSharpness::MaximumValue and return an integer value when the input sharpenss is within ON_SubDEdgeSharpness::Tolerance of an integer. More...

static unsigned	SetEdgeChainSharpness (ON_Interval chain_sharpness_range, unsigned edge_count, ON_SimpleArray< ON_SubDEdgeSharpness > &chain_edge_sharpness)
	Set chain_edge_sharpness to a sequence of evenly changing sharpnesses beginning with chain_sharpness_range[0] and ending with chain_sharpness_range[1]. More...

static unsigned	SetEdgeChainSharpness (ON_Interval chain_sharpness_range, unsigned edge_count, ON_SubDEdgeSharpness *chain_edge_sharpness)
	Set chain_edge_sharpness to a sequence of evenly changing sharpnesses beginning with chain_sharpness_range[0] and ending with chain_sharpness_range[1]. More...

static double	SharpnessFromNormalizedValue (double normalized_slider_value)
	Convert a user facing slider value to a SubD edge end sharpness value. More...

static double	SharpnessFromSliderValue (ON_Interval slider_domain, double slider_value, double invalid_input_result)
	Convert a user facing slider value to a SubD edge end sharpness value. More...

static double	ToPercentage (double sharpness, double crease_percentage)
	Convert sharpness to a percentage from 0 to 100.0. This is useful in user interface code that experesses sharpness in percentages. More...

static const ON_wString	ToPercentageText (double sharpness)
	Create a text string describing the sharpness as a percentage. This is useful in user interface code that experesses sharpness in percentages. If 0 <= sharpenss <= ON_SubDEdgeSharpness::MaximumValue, valid, a number followed by a percent sign is returned. If sharpness = ON_SubDEdgeSharpness::CreaseValue, "crease" is returned. If the sharpness is not valid, a warning sign is returned. More...

static const ON_SubDEdgeSharpness	Union (const ON_SubDEdgeSharpness &a, const ON_SubDEdgeSharpness &b)
	Return a sharpness interval that is the union of the nonzero input sharpness intervals. More...

static double	VertexSharpness (ON_SubDVertexTag vertex_tag, double interior_crease_vertex_sharpness, unsigned sharp_edge_end_count, double maximum_edge_end_sharpness)
	Calculate the vertex sharpness from the attached sharp edge information. Note that vertices with a corner tag always have zero sharpness. More...

static double	VertexSharpness (ON_SubDVertexTag vertex_tag, unsigned sharp_edge_end_count, double maximum_edge_end_sharpness)

Static Public Attributes
static const ON_SubDEdgeSharpness	Crease
	An edge sharpness with both end values = ON_SubDEdgeSharpness::CreaseValue. This value is not a valid sharpness value for a sharp edge (A sharp edge a smooth edge with nonzero sharpness). When working with edges, it is sometimes convienient to have an ON_SubDEdgeSharpness value that indicated the edge is a crease. ON_SubDEdgeSharpness::Crease is used for this purpose. More...

static const double	CreaseValue
	ON_SubDEdgeSharpness::CreaseValue = ON_SubDEdgeSharpness::MaximumValue + 1. Valid SubD edge sharpness values are <= ON_SubDEdgeSharpness::MaximumValue. This value is used when it is convenient to use and ON_SubDEdgeSharpness to indicate an edge has a crease tag. Edges with crease tags always have a sharpeness property of ON_SubDEdgeSharpness::Smooth. More...

static const ON_SubDEdgeSharpness	Maximum
	An edge sharpness with contant value ON_SubDEdgeSharpness::MaximumValue. This is the maximum sharpness that can be applied to an edge. More...

static const double	MaximumValue
	ON_SubDEdgeSharpness::MaximumValue = 4. SubD edge sharpness values are <= ON_SubDEdgeSharpness::MaximumValue. More...

static const ON_SubDEdgeSharpness	Nan
	An edge sharpness with both end values = ON_DBL_QNAN. More...

static const ON_SubDEdgeSharpness	Smooth
	An edge sharpness with contant value 0.0. More...

static const double	SmoothValue
	ON_SubDEdgeSharpness::SmoothValue = 0.0. Valid SubD edge sharpness values are <= ON_SubDEdgeSharpness::MaximumValue. Smooth edges have a sharpeness property of ON_SubDEdgeSharpness::Smooth. More...

static const double	Tolerance
	ON_SubDEdgeSharpness::Tolerance = 0.01 If an edge has sharpness within ON_SubDEdgeSharpness::Tolerance of an integer value, the sharpness is set to that integer value. More...

Detailed Description

ON_SubDHash provides a simple way to save a SubD's vertex, edge, and face SHA1 hashes. Typically it is used when a calculation needs to know if the current SubD has is geometrically identical to a previous SubD. When speed is not important, comparing the current value of ON_SubD::GeometryHash() to a previously save value of ON_SubD::GeometryHash() is functionally identical but typically much slower when the SubDs are different.

Constructor & Destructor Documentation

◆ ON_SubDEdgeSharpness() [1/2]

ON_SubDEdgeSharpness::ON_SubDEdgeSharpness ( )

default

◆ ~ON_SubDEdgeSharpness()

ON_SubDEdgeSharpness::~ON_SubDEdgeSharpness ( )

default

◆ ON_SubDEdgeSharpness() [2/2]

ON_SubDEdgeSharpness::ON_SubDEdgeSharpness ( const ON_SubDEdgeSharpness & )

default

Member Function Documentation

◆ Average()

double ON_SubDEdgeSharpness::Average ( ) const

Return the average of the sharpness interval.

Returns: 0.5*(sharpness[0]+sharpness[1])

◆ Delta()

double ON_SubDEdgeSharpness::Delta ( ) const

Returns: If IsValid() or IsCrease() is true, then EndSharpness(1) - EndSharpness(0) is returned. Otherwise ON_DBL_QNAN is returned.

◆ EndSharpness()

double ON_SubDEdgeSharpness::EndSharpness ( int end_index ) const

Get the sharpness at the start or end.

Parameters

end_index 0 or 1.

Returns: Sharpness or ON_DBL_QNAN if end_index is out of range.

◆ EqualDelta() [1/2]

static bool ON_SubDEdgeSharpness::EqualDelta	(	const class ON_SubDEdgePtr &	eptr0,
		const class ON_SubDEdgePtr &	eptr1
	)

static

Determine if edges are adjacent, have the same sharpness trend, and equal adjacent sharpness values.

Parameters

eptr0
eptr1

Returns: If the edges have the same tag, eptr0.RelativeVertex(1) = eptr1.RelativeVertex(0), and then ON_SubDEdgeSharpness::EqualDelta(eptr0.RelativeSharpness(),eptr1.RelativeSharpness()) is returned. Otherwise false is returned.

◆ EqualDelta() [2/2]

static bool ON_SubDEdgeSharpness::EqualDelta	(	ON_SubDEdgeSharpness	s0,
		ON_SubDEdgeSharpness	s1
	)

static

Determine if sharpnesses have the same delta and equal adjacent end sharpness values.

Parameters

s0
s1

Returns: If s0.Delta() = s1.Delta() and s0.EndSharpness(1) == s1.EndSharpness(0), then true is returned. Otherwise false is returned.

◆ EqualEndSharpness() [1/2]

static bool ON_SubDEdgeSharpness::EqualEndSharpness	(	const class ON_SubDEdgePtr &	eptr0,
		const class ON_SubDEdgePtr &	eptr1
	)

static

Determine if edges are adjacent and have equal adjacent sharpness values.

Parameters

eptr0
eptr1

Returns: If the edges have the same tag, eptr0.RelativeVertex(1) = eptr1.RelativeVertex(0), and then ON_SubDEdgeSharpness::EqualEndSharpness(eptr0.RelativeSharpness(),eptr1.RelativeSharpness()) is returned. Otherwise false is returned.

◆ EqualEndSharpness() [2/2]

static bool ON_SubDEdgeSharpness::EqualEndSharpness	(	ON_SubDEdgeSharpness	s0,
		ON_SubDEdgeSharpness	s1
	)

static

Determine if sharpnesses have equal adjacent end sharpness values.

Parameters

s0
s1

Returns: If s0.EndSharpness(1) == s1.EndSharpness(0), then true is returned. Otherwise false is returned.

◆ EqualTrend() [1/2]

static bool ON_SubDEdgeSharpness::EqualTrend	(	const class ON_SubDEdgePtr &	eptr0,
		const class ON_SubDEdgePtr &	eptr1
	)

static

Determine if edges are adjacent, have the same sharpness trend, and equal adjacent sharpness values.

Parameters

eptr0
eptr1

Returns: If the edges have the same tag, eptr0.RelativeVertex(1) = eptr1.RelativeVertex(0), and then ON_SubDEdgeSharpness::EqualTrend(eptr0.RelativeSharpness(),eptr1.RelativeSharpness()) is returned. Otherwise false is returned.

◆ EqualTrend() [2/2]

static bool ON_SubDEdgeSharpness::EqualTrend	(	ON_SubDEdgeSharpness	s0,
		ON_SubDEdgeSharpness	s1
	)

static

Determine if sharpnesses have the same trend and equal adjacent end sharpness values.

Parameters

s0
s1

Returns: If s0.Trend() = s1.Trend() and s0.EndSharpness(1) == s1.EndSharpness(0), then true is returned. Otherwise false is returned.

◆ FromConstant()

static const ON_SubDEdgeSharpness ON_SubDEdgeSharpness::FromConstant ( double sharpness )

static

Create a constant ON_SubDEdgeSharpness;

Parameters

sharpness 0 <= sharpness <= ON_SubDEdgeSharpness::MaximumValue

Returns: If the input values is valid, an ON_SubDEdgeSharpness with constant value sharpness is returned. If the input vaue is ON_SubDEdgeSharpness::CreaseValue, ON_SubDEdgeSharpness::Crease is returned. Otherwise ON_SubDEdgeSharpness::Nan is returned.

◆ FromInterval() [1/2]

static const ON_SubDEdgeSharpness ON_SubDEdgeSharpness::FromInterval ( const class ON_Interval & sharpness_interval )

static

Create a variable ON_SubDEdgeSharpness;

Parameters

sharpness_interval 0 <= sharpness0 <= ON_SubDEdgeSharpness::MaximumValue

Returns: If the interval's values are valid, an edge sharpness with start value sharpness_interval[0] and end value sharpness_interval[1] is returned. If both sharpness_interval[] values are ON_SubDEdgeSharpness::CreaseValue, ON_SubDEdgeSharpness::Crease::Crease is returned. Otherwise ON_SubDEdgeSharpness::Nan is returned.

◆ FromInterval() [2/2]

static const ON_SubDEdgeSharpness ON_SubDEdgeSharpness::FromInterval	(	double	sharpness0,
		double	sharpness1
	)

static

Create a variable ON_SubDEdgeSharpness;

Parameters

sharpness0	0 <= sharpness0 <= ON_SubDEdgeSharpness::MaximumValue
sharpness1	0 <= sharpness1 <= ON_SubDEdgeSharpness::MaximumValue

Returns: If both input values are valid, an edge sharpness with start value sharpness0 and end value sharpness1 is returned. If both input values are ON_SubDEdgeSharpness::CreaseValue, ON_SubDEdgeSharpness::Crease::Crease is returned. Otherwise ON_SubDEdgeSharpness::Nan is returned.

◆ IsConstant() [1/4]

bool ON_SubDEdgeSharpness::IsConstant ( ) const

Returns: If the sharpness value is valid and contant, returns true. Otherwise returns false. Note that ON_SubDEdgeSharpness::Crease.IsConstant() and ON_SubDEdgeSharpness::Nan.IsConstant() are both false. /returns>

◆ IsConstant() [2/4]

bool ON_SubDEdgeSharpness::IsConstant ( bool bCreaseResult ) const

Parameters

bCreaseResult Value to return when this is equal to ON_SubDEdgeSharpness::Crease.

Returns: If this is equal to ON_SubDEdgeSharpness::Crease, returns bCreaseResult. If the sharpness value is valid and contant, returns true. Otherwise returns false.

◆ IsConstant() [3/4]

static bool ON_SubDEdgeSharpness::IsConstant	(	const ON_SimpleArray< ON_SubDEdgePtr > &	edges,
		bool	bCreaseResult
	)

static

Determine if all the input edges have idential constant sharpeness.

Parameters

edges
bCreaseResult	Result to return if all the edges are creases.

Returns: True if all edges have identical constant sharpness.

◆ IsConstant() [4/4]

static bool ON_SubDEdgeSharpness::IsConstant	(	size_t	edge_count,
		const ON_SubDEdgePtr *	edges,
		bool	bCreaseResult
	)

static

Determine if all the input edges have idential constant sharpeness.

Parameters

edge_count
edges
bCreaseResult	Result to return if all the edges are creases.

Returns: True if all edges have identical constant sharpness.

◆ IsCrease()

bool ON_SubDEdgeSharpness::IsCrease ( ) const

Returns: If the sharpness value is (ON_SubDEdgeSharpness::CreaseValue,ON_SubDEdgeSharpness::CreaseValue), returns true. Otherwise false is returned. In particular, ON_SubDEdgeSharpness::Crease.IsCrease() is true and all other values return false.

◆ IsCreaseOrSharp()

bool ON_SubDEdgeSharpness::IsCreaseOrSharp ( ) const

Returns: (IsCrease() || IsSharp())

◆ IsDecreasing()

bool ON_SubDEdgeSharpness::IsDecreasing ( ) const

Returns: If EndSharpness(0) < EndSharpness(1), true is returned. Otherwise false is returned.

◆ IsIncreasing()

bool ON_SubDEdgeSharpness::IsIncreasing ( ) const

Returns: If EndSharpness(0) > EndSharpness(1), true is returned. Otherwise false is returned.

◆ IsNotValid() [1/2]

bool ON_SubDEdgeSharpness::IsNotValid ( ) const

Returns: Returns the opposite of IsValid(). Note that ON_SubDEdgeSharpness::Crease.IsNotValid() and ON_SubDEdgeSharpness::Nan.IsNotValid() are both true.

◆ IsNotValid() [2/2]

bool ON_SubDEdgeSharpness::IsNotValid ( bool bCreaseResult ) const

Parameters

bCreaseResult Value to return when this is equal to ON_SubDEdgeSharpness::Crease.

Returns: If this is equal to ON_SubDEdgeSharpness::Crease, returns bCreaseResult. Otherwise returns the opposite of IsValid().

◆ IsSharp()

bool ON_SubDEdgeSharpness::IsSharp ( ) const

Returns: If both end sharpness values are >= 0 and <= ON_SubDEdgeSharpness::MaximumValue and at least one end sharpness value is > 0, returns true. Otherwise returns false. Note that ON_SubDEdgeSharpness::Crease.IsSharp() and ON_SubDEdgeSharpness::Nan.IsSharp() are both false;

◆ IsValid() [1/2]

bool ON_SubDEdgeSharpness::IsValid ( ) const

Returns: If both end sharpness values are >= 0 and <= ON_SubDEdgeSharpness::MaximumValue, returns true. Note that ON_SubDEdgeSharpness::Crease.IsValid() and ON_SubDEdgeSharpness::Nan.IsValid() are both false.

◆ IsValid() [2/2]

bool ON_SubDEdgeSharpness::IsValid ( bool bCreaseResult ) const

Parameters

bCreaseResult Value to return when this is equal to ON_SubDEdgeSharpness::Crease.

Returns: If both end sharpness values are >= 0 and <= ON_SubDEdgeSharpness::MaximumValue, returns true. If this is equal to ON_SubDEdgeSharpness::Crease, returns bCreaseResult. Otherwise returns false.

◆ IsValidValue()

static bool ON_SubDEdgeSharpness::IsValidValue	(	double	candidate_value,
		bool	bCreaseResult
	)

static

Determine if candidate_value is a valid edge end sharpness value.

Parameters

candidate_value	value to check
bCreaseResult	Value to return when ON_SubDEdgeSharpness::CreaseValue == candidate_value

Returns

◆ IsVariable()

bool ON_SubDEdgeSharpness::IsVariable ( ) const

Returns: True if the sharpness value is valid and variable. Note that ON_SubDEdgeSharpness::Crease.IsVariable() and ON_SubDEdgeSharpness::Nan.IsVariable() are both false.

◆ IsZero()

bool ON_SubDEdgeSharpness::IsZero ( ) const

Returns: True if the sharpness is zero.

◆ MaximumEndSharpness()

double ON_SubDEdgeSharpness::MaximumEndSharpness ( ) const

Return the maximum of the sharpness interval.

Returns: The maximum of the sharpness interval

◆ MinimumEndSharpness()

double ON_SubDEdgeSharpness::MinimumEndSharpness ( ) const

Return the minimum of the sharpness interval.

Returns: The minimum of the sharpness interval

◆ operator=()

ON_SubDEdgeSharpness& ON_SubDEdgeSharpness::operator= ( const ON_SubDEdgeSharpness & )

default

◆ operator[]()

double ON_SubDEdgeSharpness::operator[] ( int end_index ) const

Get the edge sharpness at the start or end.

<param name="end_index"0 or 1.

Returns: EndSharpness(end_index).

◆ Reversed()

const ON_SubDEdgeSharpness ON_SubDEdgeSharpness::Reversed ( ) const

◆ Sanitize() [1/2]

static double ON_SubDEdgeSharpness::Sanitize ( double sharpness )

static

Verify 0 <= sharpness <= ON_SubDEdgeSharpness::MaximumValue and return an integer value when the input sharpenss is within ON_SubDEdgeSharpness::Tolerance of an integer.

Parameters

sharpness

Returns: SubD edge sharpness value that makes sense or 0.0 if the input sharpness is invalid.

◆ Sanitize() [2/2]

static double ON_SubDEdgeSharpness::Sanitize	(	double	sharpness,
		double	invalid_input_result
	)

static

Verify 0 <= sharpness <= ON_SubDEdgeSharpness::MaximumValue and return an integer value when the input sharpenss is within ON_SubDEdgeSharpness::Tolerance of an integer.

Parameters

sharpness
invalid_input_result	Value returned when the sharpness parameter is invalid.

Returns: SubD edge sharpness value that makes sense.

◆ SetEdgeChainSharpness() [1/2]

static unsigned ON_SubDEdgeSharpness::SetEdgeChainSharpness	(	ON_Interval	chain_sharpness_range,
		unsigned	edge_count,
		ON_SimpleArray< ON_SubDEdgeSharpness > &	chain_edge_sharpness
	)

static

Set chain_edge_sharpness to a sequence of evenly changing sharpnesses beginning with chain_sharpness_range[0] and ending with chain_sharpness_range[1].

Parameters

chain_sharpness_range	Beginning and ending sharpnesses.
edge_count	Number of edges in the chain.
chain_edge_sharpness	The list of sharpnesses is returned here.

Returns: If the sharpness is constant, 1 is returned. If the sharpness varies from edge to edge, edge_count is returned. Otherwise 0 is returned.

◆ SetEdgeChainSharpness() [2/2]

static unsigned ON_SubDEdgeSharpness::SetEdgeChainSharpness	(	ON_Interval	chain_sharpness_range,
		unsigned	edge_count,
		ON_SubDEdgeSharpness *	chain_edge_sharpness
	)

static

Set chain_edge_sharpness to a sequence of evenly changing sharpnesses beginning with chain_sharpness_range[0] and ending with chain_sharpness_range[1].

Parameters

chain_sharpness_range	Beginning and ending sharpnesses.
edge_count	Number of edges in the chain.
chain_edge_sharpness	The list of sharpnesses is returned here. chain_edge_sharpness[] must have a capacity >= edge_count.

Returns: If the sharpness is constant, 1 is returned. If the sharpness varies from edge to edge, edge_count is returned. Otherwise 0 is returned.

◆ SharpnessFromNormalizedValue()

static double ON_SubDEdgeSharpness::SharpnessFromNormalizedValue ( double normalized_slider_value )

static

Convert a user facing slider value to a SubD edge end sharpness value.

Parameters

slider_domain	Non empty slider domain. (Often ON_Interval::ZeroToOne.)
normalized_slider_value	0 <= normalized_slider_value <= 1.
invalid_input_result	Value to return if the input is not valid.

Returns: If 0 <= normalized_slider_value <= 1, the normalized slider value converted to an ON_SubDEdge sharpness value from 0 to ON_SubDEdgeSharpness::MaximumValue. Otherwise, ON_DBL_QNAN is returned.

◆ SharpnessFromSliderValue()

static double ON_SubDEdgeSharpness::SharpnessFromSliderValue	(	ON_Interval	slider_domain,
		double	slider_value,
		double	invalid_input_result
	)

static

Convert a user facing slider value to a SubD edge end sharpness value.

Parameters

slider_domain	Non empty slider domain. (Often ON_Interval::ZeroToOne.)
slider_value	A value in the slider_domain. slider_domain[0] returns 0.0. slider_domain[1] returns ON_SubDEdgeSharpness::MaximumValue.
invalid_input_result	Value to return if the input is not valid.

Returns: The slider value converted to an ON_SubDEdge sharpness value.

◆ Subdivided()

const ON_SubDEdgeSharpness ON_SubDEdgeSharpness::Subdivided ( int end_index ) const

Sharpness value for a subdivided edge.

<param name="end_index"0 or 1.

Returns: Subdivided sharpness or ON_SubDEdgeSharpness::Smooth if index is out of range.

◆ ToPercentage()

static double ON_SubDEdgeSharpness::ToPercentage	(	double	sharpness,
		double	crease_percentage
	)

static

Convert sharpness to a percentage from 0 to 100.0. This is useful in user interface code that experesses sharpness in percentages.

Parameters

sharpness
crease_percentage

Returns: If 0 <= sharpness <= ON_SubDEdgeSharpness::MaximumValue, then 100.0*sharpness/ON_SubDEdgeSharpness::MaximumValue is returned. If sharpness = ON_SubDEdgeSharpness::CreaseValue, then crease_percentage is returned. Otherwise ON_DBL_QNAN is returned.

◆ ToPercentageText() [1/2]

const ON_wString ON_SubDEdgeSharpness::ToPercentageText ( bool bOrderMinToMax ) const

Create a text string describing the sharpness as a percentage. If the sharpness is constant, and single percentage is returned. If the sharpness is variable, percentage range returned. If the sharpness is not valid, a warning sign is returned.

Parameters

bOrderMinToMax If the sharpness is not constant and bOrderMinToMax is true, then the string has the format min%-max%. If the sharpness is not constant and bOrderMinToMax is false, then the string has the format EndSharpness(0)%-EndSharpness(1)%.

Returns: A string describing the sharpness as a percentage range.

◆ ToPercentageText() [2/2]

static const ON_wString ON_SubDEdgeSharpness::ToPercentageText ( double sharpness )

static

Create a text string describing the sharpness as a percentage. This is useful in user interface code that experesses sharpness in percentages. If 0 <= sharpenss <= ON_SubDEdgeSharpness::MaximumValue, valid, a number followed by a percent sign is returned. If sharpness = ON_SubDEdgeSharpness::CreaseValue, "crease" is returned. If the sharpness is not valid, a warning sign is returned.

Parameters

sharpness

Returns

◆ Trend()

int ON_SubDEdgeSharpness::Trend ( ) const

Returns: If EndSharpness(0) < EndSharpness(1), +1 is returned. If EndSharpness(0) > EndSharpness(1), -1 is returned. If EndSharpness(0) = EndSharpness(1), 0 is returned. Otherwise ON_UNSET_INT_INDEX is returned.

◆ Union()

static const ON_SubDEdgeSharpness ON_SubDEdgeSharpness::Union	(	const ON_SubDEdgeSharpness &	a,
		const ON_SubDEdgeSharpness &	b
	)

static

Return a sharpness interval that is the union of the nonzero input sharpness intervals.

Parameters

a
b

Returns: If an input parameter is ON_SubDEdgeSharpness::Smooth, ON_SubDEdgeSharpness::Crease, or ON_SubDEdgeSharpness::Nan, then that parameter it is ignored. The returned interval is the union of the nonzero valid input intervals. If no input intervals are nonzero, then ON_SubDEdgeSharpness::Smooth is returned. Either the returned sharpness is ON_SubDEdgeSharpness::Smooth or has 0.0 < sharpness[0] <= sharpness[1] <= ON_SubDEdgeSharpness::MaximumValue.

◆ VertexSharpness() [1/2]

static double ON_SubDEdgeSharpness::VertexSharpness	(	ON_SubDVertexTag	vertex_tag,
		double	interior_crease_vertex_sharpness,
		unsigned	sharp_edge_end_count,
		double	maximum_edge_end_sharpness
	)

static

Calculate the vertex sharpness from the attached sharp edge information. Note that vertices with a corner tag always have zero sharpness.

Parameters

vertex_tag	The vertex tag (smooth, crease, dart, corner). For smooth, crease, and dart, this is used to determine the number of attached crease edges. COrner vertices always have sharpness = 0.
interior_crease_vertex_sharpness	If the original source of the vertex is an interior crease vertex (vertex_tag = ON_SubDVertexTag::Crease, 2 sectors, EdgeCount() = FaceCount() >= 2), then interior_crease_vertex_sharpness is the maximum edge sharpness at the vertex's end of all smooth edges from both sectors. This paramter is important in special situations that occur in low level SubD evaluation code where information from only one sector is present. In all other cases, this value doesn't matter as long as <= global_vertex_sharpness <= maximum_edge_end_sharpness. When in doubt pass 0.0.
sharp_edge_end_count	Number of sharp edges attached to the vertex that have nonzero end sharpness at the vertex.
maximum_edge_end_sharpness	The largest sharp edge end sharpness at the vertex.

Returns

◆ VertexSharpness() [2/2]

static double ON_SubDEdgeSharpness::VertexSharpness	(	ON_SubDVertexTag	vertex_tag,
		unsigned	sharp_edge_end_count,
		double	maximum_edge_end_sharpness
	)

static

Deprecated:: Use the version with an interior_crease_vertex_sharpness parameter.

Member Data Documentation

◆ Crease

const ON_SubDEdgeSharpness ON_SubDEdgeSharpness::Crease

static

An edge sharpness with both end values = ON_SubDEdgeSharpness::CreaseValue. This value is not a valid sharpness value for a sharp edge (A sharp edge a smooth edge with nonzero sharpness). When working with edges, it is sometimes convienient to have an ON_SubDEdgeSharpness value that indicated the edge is a crease. ON_SubDEdgeSharpness::Crease is used for this purpose.

◆ CreaseValue

const double ON_SubDEdgeSharpness::CreaseValue

static

ON_SubDEdgeSharpness::CreaseValue = ON_SubDEdgeSharpness::MaximumValue + 1. Valid SubD edge sharpness values are <= ON_SubDEdgeSharpness::MaximumValue. This value is used when it is convenient to use and ON_SubDEdgeSharpness to indicate an edge has a crease tag. Edges with crease tags always have a sharpeness property of ON_SubDEdgeSharpness::Smooth.

◆ Maximum

const ON_SubDEdgeSharpness ON_SubDEdgeSharpness::Maximum

static

An edge sharpness with contant value ON_SubDEdgeSharpness::MaximumValue. This is the maximum sharpness that can be applied to an edge.

◆ MaximumValue

const double ON_SubDEdgeSharpness::MaximumValue

static

ON_SubDEdgeSharpness::MaximumValue = 4. SubD edge sharpness values are <= ON_SubDEdgeSharpness::MaximumValue.

◆ Nan

const ON_SubDEdgeSharpness ON_SubDEdgeSharpness::Nan

static

An edge sharpness with both end values = ON_DBL_QNAN.

◆ Smooth

const ON_SubDEdgeSharpness ON_SubDEdgeSharpness::Smooth

static

An edge sharpness with contant value 0.0.

◆ SmoothValue

const double ON_SubDEdgeSharpness::SmoothValue

static

ON_SubDEdgeSharpness::SmoothValue = 0.0. Valid SubD edge sharpness values are <= ON_SubDEdgeSharpness::MaximumValue. Smooth edges have a sharpeness property of ON_SubDEdgeSharpness::Smooth.

◆ Tolerance

const double ON_SubDEdgeSharpness::Tolerance

static

ON_SubDEdgeSharpness::Tolerance = 0.01 If an edge has sharpness within ON_SubDEdgeSharpness::Tolerance of an integer value, the sharpness is set to that integer value.

Public Member Functions

Static Public Member Functions

Static Public Attributes

Detailed Description

Constructor & Destructor Documentation

◆ ON_SubDEdgeSharpness() [1/2]

◆ ~ON_SubDEdgeSharpness()

◆ ON_SubDEdgeSharpness() [2/2]

Member Function Documentation

◆ Average()

◆ Delta()

◆ EndSharpness()

◆ EqualDelta() [1/2]

◆ EqualDelta() [2/2]

◆ EqualEndSharpness() [1/2]

◆ EqualEndSharpness() [2/2]

◆ EqualTrend() [1/2]

◆ EqualTrend() [2/2]

◆ FromConstant()

◆ FromInterval() [1/2]

◆ FromInterval() [2/2]

◆ IsConstant() [1/4]

◆ IsConstant() [2/4]

◆ IsConstant() [3/4]

◆ IsConstant() [4/4]

◆ IsCrease()

◆ IsCreaseOrSharp()

◆ IsDecreasing()

◆ IsIncreasing()

◆ IsNotValid() [1/2]

◆ IsNotValid() [2/2]

◆ IsSharp()

◆ IsValid() [1/2]

◆ IsValid() [2/2]

◆ IsValidValue()

◆ IsVariable()

◆ IsZero()

◆ MaximumEndSharpness()

◆ MinimumEndSharpness()

◆ operator=()

◆ operator[]()

◆ Reversed()

◆ Sanitize() [1/2]

◆ Sanitize() [2/2]

◆ SetEdgeChainSharpness() [1/2]

◆ SetEdgeChainSharpness() [2/2]

◆ SharpnessFromNormalizedValue()

◆ SharpnessFromSliderValue()

◆ Subdivided()

◆ ToPercentage()

◆ ToPercentageText() [1/2]

◆ ToPercentageText() [2/2]

◆ Trend()

◆ Union()

◆ VertexSharpness() [1/2]

◆ VertexSharpness() [2/2]

Member Data Documentation

◆ Crease

◆ CreaseValue

◆ Maximum

◆ MaximumValue

◆ Nan

◆ Smooth

◆ SmoothValue

◆ Tolerance