Slopetriangle - Documentation

Usage (signatures)

board.create('slopetriangle', [t]);

Parameters

Name	Type	Description
`t`	Line	A tangent based on a glider on some object, e.g. curve, circle, line or turtle.

Example

// Create a slopetriangle on a tangent
var f = board.create('plot', ['sin(x)']),
    g = board.create('glider', [1, 2, f]),
    t = board.create('tangent', [g]),

    st = board.create('slopetriangle', [t]);

board.create('slopetriangle', [line, p]);

A line and a point on that line. The user has to take care that the point is a member of the line.

Parameters

Name	Type	Description
`line`	Line
`p`	Point

Example

// Create a on a line and a point on that line
var p1 = board.create('point', [-2, 3]),
    p2 = board.create('point', [2, -3]),
    li = board.create('line', [p1, p2]),
    p = board.create('glider', [0, 0, li]),

    st = board.create('slopetriangle', [li, p]);

Attributes

Own

baseline

Description: Attributes for the base line.
Type: Line
Source: options.js, line 9316

basepoint

Description: Attributes for the base point.
Type: Point
Source: options.js, line 9329

digits

Description: Used to round texts given by a number.
Type: Number
Default Value: 2
Source: options.js, line 9398

formatValue

Description: Function to format the value. If set to null, no formatting will happen.
Type: function
Default Value: null
Source: options.js, line 9453

glider

Description: Attributes for the gliding helper point.
Type: Point
Source: options.js, line 9303

label

Description: Attributes for the slope triangle label.
Type: Label
Source: options.js, line 9370

prefix

Description

String that is displayed before the slope triangle and its unit.

Type

String

Default Value

See

Slopetriangle#showPrefix

Source

options.js, line 9431

showPrefix

Description

Determines whether a prefix is displayed before the slope triangle value and unit.

Type

Boolean

Default Value

false

See

Slopetriangle#prefix

Source

options.js, line 9409

showSuffix

Description

Determines whether a suffix is displayed after the slope triangle value and unit.

Type

Boolean

Default Value

false

See

Slopetriangle#suffix

Source

options.js, line 9420

suffix

Description

String that is displayed after the slope triangle and its unit.

Type

String

Default Value

See

Slopetriangle#showSuffix

Source

options.js, line 9442

tangent

Description: Attributes for the tangent. The tangent is constructed by slop triangle if the construction is based on a glider, solely.
Type: Line
Source: options.js, line 9342

toppoint

Description: Attributes for the top point.
Type: Point
Source: options.js, line 9357

Inherited

gradientSecondOpacity

highlightStrokeOpacity

highlightStrokeWidth

ignoreForLabelAutoposition

Members

Own

none

Inherited

Methods

Own

DeltaX() → {Number}

Returns δx of the slope triangle, that is the slope of the tangent. This value is less than 0 if the line points to the left.

Returns

Type: Number

Details

Source: element/slopetriangle.js, line 230

DeltaY() → {Number}

Returns δy of the slope triangle, that is the slope of the tangent. This value is less than 0 if the line points to the bottom.

Returns

Type: Number

Details

Source: element/slopetriangle.js, line 240

Direction() → {Number}

Returns the direction of the slope triangle, that is the direction of the tangent.

Returns

slope of the tangent.

Type: Number

Details

Overrides

JXG.Line#Direction

See

Line#Direction

Source

element/slopetriangle.js, line 250

Slope() → {Number}

Returns the slope of the tangent.

Returns

slope of the tangent.

Type: Number

Details

Overrides: JXG.Line#Slope
Source: element/slopetriangle.js, line 205

getAngle(unitopt) → {Number}

Returns the angle between the tangent and the x-axis.

Parameters

Name Type Attributes Default Description

Name	Type	Attributes	Default	Description
`unit`	String	<optional>	`'radians'`	Unit of the returned values. Possible units are `'radians'` (default): angle value in radians `'degrees'`: angle value in degrees `'semicircle'`: angle value in radians as a multiple of π, e.g. if the angle is 1.5π, 1.5 will be returned. `'circle'`: angle value in radians as a multiple of 2π

unit

String

'radians'

Unit of the returned values. Possible units are

'radians' (default): angle value in radians
'degrees': angle value in degrees
'semicircle': angle value in radians as a multiple of π, e.g. if the angle is 1.5π, 1.5 will be returned.
'circle': angle value in radians as a multiple of 2π