calc

package
v1.1.3 Latest Latest
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 Go to latest Published: Aug 30, 2022 License: LGPL-2.1 Imports: 2 Imported by: 0

Documentation

Overview

Package calc methods and parameters be realized ouble precision calculation.

Index

Constants

View Source 
const (

	// OffsetSegmentSeparationFactor  Factor which controls how close offset segments can be to
	//   skip adding a filler or mitre.
	OffsetSegmentSeparationFactor = 1.0e-3

	// InsideTurnVertexSnapDistanceFactor Factor which controls how close curve vertices on inside turns can be to be snapped
	InsideTurnVertexSnapDistanceFactor = 1.0e-3

	// CurveVertexSnapDistanceFactor Factor which controls how close curve vertices can be to be snapped
	CurveVertexSnapDistanceFactor = 1.0e-6

	// MaxClosingSegLenFactor Factor which determines how short closing segs can be for round buffers
	MaxClosingSegLenFactor = 80

	// DecimalPlaces ...
	DecimalPlaces = "%.10f"

	// DefaultTolerance6 ...
	DefaultTolerance6 = 1.0e-6

	// DefaultTolerance7 ...
	DefaultTolerance7 = 1.0e-7

	// DefaultTolerance8 ...
	DefaultTolerance8 = 1.0e-8

	// DefaultTolerance9 ...
	DefaultTolerance9 = 1.0e-9

	// DefaultTolerance10 ...
	DefaultTolerance10 = 1.0e-10

	// DefaultTolerance12 ...
	DefaultTolerance12 = 1.0e-12

	// DefaultTolerance13 ...
	DefaultTolerance13 = 1.0e-13

	// DefaultTolerance15 ...
	DefaultTolerance15 = 1.0e-15

	AccuracyFloat = DefaultTolerance12

	DefaultTolerance = DefaultTolerance10
)

Defined constant variable

View Source 
const (
	// OverlayPoints ...
	OverlayPoints = iota
	// OverlayClosed edge is closed.
	OverlayClosed
	// OverlayMain overlay main polygon.
	OverlayMain
	// OverlayCut overlay cut polygon.
	OverlayCut
	// OverlayClip overlay clip.
	OverlayClip
	// OverlayMerge overlay merge.
	OverlayMerge
)

const Defined constant variable overlay parameters.

View Source 
const (
	// ClockWise ...
	ClockWise        = -1
	CounterClockWise = 1

	SideLeft  = 1
	SideRight = 2

	// MinRingSize ...
	MinRingSize = 3
	// MaxRingSize ...
	MaxRingSize = 9
	// NearnessFactor ...
	NearnessFactor = 0.99

	// CapRound Specifies a round line buffer end cap style.
	CapRound = 1
	// CapFlat Specifies a flat line buffer end cap style.
	CapFlat = 2
	// CapSquare Specifies a square line buffer end cap style.
	CapSquare = 3

	//JoinRound Specifies a round join style.
	JoinRound = 1
	// JoinMitre Specifies a mitre join style.
	JoinMitre = 2
	// JoinBevel Specifies a bevel join style.
	JoinBevel = 3

	// QuadrantSegments The default number of facets into which to divide a fillet of 90 degrees.
	// A value of 8 gives less than 2% max error in the buffer distance.
	// For a max error of < 1%, use QS = 12.
	// For a max error of < 0.1%, use QS = 18.
	QuadrantSegments = 8

	// MitreLimit
	// The default mitre limit
	// Allows fairly pointy mitres.
	MitreLimit = 5.0

	// SimplifyFactor
	// The default simplify factor
	// Provides an accuracy of about 1%, which matches the accuracy of the default Quadrant Segments parameter.
	SimplifyFactor = 0.01
)

const Defined constant variable parameters.

View Source 
const (
	// The location value for the exterior of a geometry.
	// Also, DE-9IM row index of the exterior of the first geometry and column index
	ImInterior = 0
	ImBoundary = 1
	ImExterior = 2

	// ImFalse Dimension value of the empty geometry (-1).
	// ImTrue Dimension value of non-empty geometries (= {P, L, A}).
	// ImNotCare Dimension value for any dimension (= {ImFalse, TRUE}).
	ImFalse   = -1
	ImTrue    = -2
	ImNotCare = -3

	ImP          = 0
	ImL          = 1
	ImA          = 2
	ImSymFalse   = 'F'
	ImSymTrue    = 'T'
	ImSymNotCare = '*'
	ImSymP       = '0'
	ImSymL       = '1'
	ImSymA       = '2'
)

const default DE-9IM and Dimension parameters.

View Source 
const (
	// Split The value to split a double-precision value on during multiplication
	Split = 134217729.0 // 2^27+1, for IEEE
)

const Defined constant variable calc parameter

Variables

This section is empty.

Functions

func DecimalFloat10 added in v1.1.0 

func DecimalFloat10(x float64) float64

DecimalFloat10 Returns float64 , DecimalPlaces 10.

func Signum 

func Signum(x float64) int

Signum Returns an integer indicating the sign of this value.

Types

type PairFloat 

type PairFloat struct {
	Hi, Lo float64
}

PairFloat A DoubleDouble uses a representation containing two double-precision values. A number x is represented as a pair of doubles, x.hi and x.lo

func Determinant added in v1.0.2 

func Determinant(x1, y1, x2, y2 float64) *PairFloat

Determinant Computes the determinant of the 2x2 matrix with the given entries.

func DeterminantPair added in v1.0.2 

func DeterminantPair(x1, y1, x2, y2 *PairFloat) *PairFloat

DeterminantPair Computes the determinant of the 2x2 matrix with the given entries.

func ValueOf 

func ValueOf(x float64) *PairFloat

ValueOf Converts the argument to a number.

func (*PairFloat) Add added in v1.0.2 

func (d *PairFloat) Add(yhi, ylo float64) *PairFloat

Add Adds the argument to the value of DD. To prevent altering constants, this method must only be used on values known to be newly created.

func (*PairFloat) AddOne added in v1.0.2 

func (d *PairFloat) AddOne(y float64) *PairFloat

AddOne Adds the argument to the value of DD. To prevent altering constants, this method must only be used on values known to be newly created.

func (*PairFloat) AddPair added in v1.0.2 

func (d *PairFloat) AddPair(y *PairFloat) *PairFloat

AddPair Adds the argument to the value of DD. To prevent altering constants, this method must only be used on values known to be newly created.

func (*PairFloat) CompareTo 

func (d *PairFloat) CompareTo(other *PairFloat) int

CompareTo Compares two objects numerically.

func (*PairFloat) Divide added in v1.0.2 

func (d *PairFloat) Divide(yhi, ylo float64) *PairFloat

Divide Divides this object by the argument, returning DD. To prevent altering constants, this method must only be used on values known to be newly created.

func (*PairFloat) DividePair added in v1.0.2 

func (d *PairFloat) DividePair(y *PairFloat) *PairFloat

DividePair Divides this object by the argument, returning DD. To prevent altering constants, this method must only be used on values known to be newly created.

func (*PairFloat) Equals 

func (d *PairFloat) Equals(y *PairFloat) bool

Equals Tests whether this value is equal to another value.

func (*PairFloat) Ge 

func (d *PairFloat) Ge(y *PairFloat) bool

Ge Tests whether this value is greater than or equals to another value.

func (*PairFloat) Gt 

func (d *PairFloat) Gt(y *PairFloat) bool

Gt Tests whether this value is greater than another value.

func (*PairFloat) IsZero 

func (d *PairFloat) IsZero() bool

IsZero Tests whether this value is equal to 0.

func (*PairFloat) Le 

func (d *PairFloat) Le(y *PairFloat) bool

Le Tests whether this value is less than or equal to another value.

func (*PairFloat) Lt 

func (d *PairFloat) Lt(y *PairFloat) bool

Lt Tests whether this value is less than another value.

func (*PairFloat) Multiply added in v1.0.2 

func (d *PairFloat) Multiply(yhi, ylo float64) *PairFloat

Multiply Multiplies this object by the argument, returning DD. To prevent altering constants, this method must only be used on values known to be newly created.

func (*PairFloat) MultiplyPair added in v1.0.2 

func (d *PairFloat) MultiplyPair(y *PairFloat) *PairFloat

MultiplyPair Multiplies this object by the argument, returning DD. To prevent altering constants, this method must only be used on values known to be newly created.

func (*PairFloat) Pow2 added in v1.1.1 

func (d *PairFloat) Pow2() *PairFloat

Pow2 Returns the square of this value.

func (*PairFloat) SelfAdd 

func (d *PairFloat) SelfAdd(yhi, ylo float64) *PairFloat

SelfAdd Adds the argument to the value of DD. To prevent altering constants, this method must only be used on values known to be newly created.

func (*PairFloat) SelfAddOne 

func (d *PairFloat) SelfAddOne(y float64) *PairFloat

SelfAddOne Adds the argument to the value of DD. To prevent altering constants, this method must only be used on values known to be newly created.

func (*PairFloat) SelfAddPair added in v1.0.2 

func (d *PairFloat) SelfAddPair(y *PairFloat) *PairFloat

SelfAddPair Adds the argument to the value of DD. To prevent altering constants, this method must only be used on values known to be newly created.

func (*PairFloat) SelfDivide 

func (d *PairFloat) SelfDivide(yhi, ylo float64) *PairFloat

SelfDivide Divides this object by the argument, returning DD. To prevent altering constants, this method must only be used on values known to be newly created.

func (*PairFloat) SelfDividePair added in v1.0.2 

func (d *PairFloat) SelfDividePair(y *PairFloat) *PairFloat

SelfDividePair Divides this object by the argument, returning DD. To prevent altering constants, this method must only be used on values known to be newly created.

func (*PairFloat) SelfMultiply 

func (d *PairFloat) SelfMultiply(yhi, ylo float64) *PairFloat

SelfMultiply Multiplies this object by the argument, returning DD. To prevent altering constants, this method must only be used on values known to be newly created.

func (*PairFloat) SelfMultiplyPair 

func (d *PairFloat) SelfMultiplyPair(y *PairFloat) *PairFloat

SelfMultiplyPair Multiplies this object by the argument, returning DD. To prevent altering constants, this method must only be used on values known to be newly created.

func (*PairFloat) SelfPow2 added in v1.1.1 

func (d *PairFloat) SelfPow2() *PairFloat

SelfPow2 Squares this object. To prevent altering constants, this method must only be used on values known to be newly created.

func (*PairFloat) SelfSubtract 

func (d *PairFloat) SelfSubtract(yhi, ylo float64) *PairFloat

SelfSubtract Subtracts the argument from the value of DD. To prevent altering constants, this method must only be used on values known to be newly created.

func (*PairFloat) SelfSubtractPair added in v1.0.2 

func (d *PairFloat) SelfSubtractPair(y *PairFloat) *PairFloat

SelfSubtractPair Subtracts the argument from the value of DD. To prevent altering constants, this method must only be used on values known to be newly created.

func (*PairFloat) Signum 

func (d *PairFloat) Signum() int

Signum Returns an integer indicating the sign of this value.

func (*PairFloat) Subtract added in v1.0.2 

func (d *PairFloat) Subtract(yhi, ylo float64) *PairFloat

Subtract Subtracts the argument from the value of DD. To prevent altering constants, this method must only be used on values known to be newly created.

func (*PairFloat) SubtractPair added in v1.0.2 

func (d *PairFloat) SubtractPair(y *PairFloat) *PairFloat

SubtractPair Subtracts the argument from the value of DD. To prevent altering constants, this method must only be used on values known to be newly created.

func (*PairFloat) Value added in v1.0.2 

func (d *PairFloat) Value() float64

Value Converts this value to the nearest double-precision number.

Source Files

View all Source files

Directories

Path Synopsis
Package angle define angel calculation function.
 Package angle define angel calculation function.
Package bytevalues ead and write primitive datatypes from/to byte
 Package bytevalues ead and write primitive datatypes from/to byte

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