Attributes
Own
none
Inherited
Members
Own
defaultTicks : JXG.Ticks
- Description
Reference of the ticks created automatically when constructing an axis.
- Type
- JXG.Ticks
- See
- Source
- base/line.js, line 99
(private) parentPolygon : JXG.Polygon
- Description
If the line is the border of a polygon, the polygon object is stored, otherwise null.
- Type
- JXG.Polygon
- Default Value
- null
- Source
- base/line.js, line 107
point1 : JXG.Point
- Description
Starting point of the line. You really should not set this field directly as it may break JSXGraph's update system so your construction won't be updated properly.
- Type
- JXG.Point
- Source
- base/line.js, line 78
point2 : JXG.Point
- Description
End point of the line. Just like JXG.Line.point1 you shouldn't write this field directly.
- Type
- JXG.Point
- Source
- base/line.js, line 84
ticks : Array
- Description
Array of ticks storing all the ticks on this line. Do not set this field directly and use JXG.GeometryElement#addTicks and JXG.GeometryElement#removeTicks to add and remove ticks to and from the line.
- Type
- Array
- See
- Source
- base/line.js, line 92
Inherited
Methods
Own
Direction() → {Array}
Returns the direction vector of the line. This is an array of length two containing the direction vector as [x, y]. It is defined as
- the difference of the x- and y-coordinate of the second and first point, in case both points are finite or both points are infinite.
[x, y]coordinates of point2, in case only point2 is infinite.[-x, -y]coordinates of point1, in case only point1 is infinite.
Returns
of length 2.
- Type
- Array
Details
- Source
- base/line.js, line 600
Ft(t) → {Array}
Return the homogeneous coordinates of the line treated as curve at t - including all transformations applied to the curve.
Parameters
| Name | Type | Description |
|---|---|---|
t |
Number | A number |
Returns
[Z(t), X(t), Y(t)]
- Type
- Array
Details
- See
- Source
- base/line.js, line 1081
L() → {Number}
The distance between the two points defining the line.
Returns
- Type
- Number
Details
- Source
- base/line.js, line 1097
Slope() → {Number}
Calculates the slope of the line.
Returns
The slope of the line or Infinity if the line is parallel to the y-axis.
- Type
- Number
Details
- Source
- base/line.js, line 537
X(t) → {Number}
Treat the line as parametric curve in homogeneous coordinates, where the parameter t runs from 0 to 1. First we transform the interval [0,1] to [-1,1]. If the line has homogeneous coordinates [c, a, b] = stdform[] then the direction of the line is [b, -a]. Now, we take one finite point that defines the line, i.e. we take either point1 or point2 (in case the line is not the ideal line). Let the coordinates of that point be [z, x, y]. Then, the curve runs linearly from [0, b, -a] (t=-1) to [z, x, y] (t=0) and [z, x, y] (t=0) to [0, -b, a] (t=1)
Parameters
| Name | Type | Description |
|---|---|---|
t |
Number | Parameter running from 0 to 1. |
Returns
X(t) x-coordinate of the line treated as parametric curve.
- Type
- Number
Details
- Source
- base/line.js, line 983
Y(t) → {Number}
Treat the line as parametric curve in homogeneous coordinates. See JXG.Line#X for a detailed description.
Parameters
| Name | Type | Description |
|---|---|---|
t |
Number | Parameter running from 0 to 1. |
Returns
Y(t) y-coordinate of the line treated as parametric curve.
- Type
- Number
Details
- See
- Source
- base/line.js, line 1019
Z(t) → {Number}
Treat the line as parametric curve in homogeneous coordinates. See JXG.Line#X for a detailed description.
Parameters
| Name | Type | Description |
|---|---|---|
t |
Number | Parameter running from 0 to 1. |
Returns
Z(t) z-coordinate of the line treated as parametric curve.
- Type
- Number
Details
- See
- Source
- base/line.js, line 1056
addTransform(transform) → {JXG.Line}
Add transformations to this line.
Parameters
| Name | Type | Description |
|---|---|---|
transform |
JXG.Transformation | Array | Either one JXG.Transformation or an array of JXG.Transformations. |
Returns
Reference to this line object.
- Type
- JXG.Line
Details
- Overrides
- JXG.GeometryElement#addTransform
- Source
- base/line.js, line 852
getAngle(unitopt) → {Number}
Determines the angle between the positive x axis and the line.
Parameters
| Name | Type | Attributes | Default | Description |
|---|---|---|---|---|
unit |
String |
<optional> |
'radians'
|
Unit of the returned values. Possible units are
|
Returns
- Type
- Number
Details
- Source
- base/line.js, line 566
getRise() → {Number}
Calculates the y intersect of the line.
Returns
The y intersect.
- Type
- Number
Details
- Source
- base/line.js, line 525
getSlope() → {Number}
Alias for line.Slope
Returns
The slope of the line or Infinity if the line is parallel to the y-axis.
- Type
- Number
Details
- Deprecated
- Yes
- See
- Source
- base/line.js, line 551
hasPoint(x, y) → {Boolean}
Checks whether (x,y) is near the line.
Parameters
| Name | Type | Description |
|---|---|---|
x |
Number | Coordinate in x direction, screen coordinates. |
y |
Number | Coordinate in y direction, screen coordinates. |
Returns
True if (x,y) is near the line, False otherwise.
- Type
- Boolean
Details
- Overrides
- JXG.GeometryElement#hasPoint
- Source
- base/line.js, line 170
isHorizontal() → {Boolean}
Returns true, if the line is horizontal (if the y coordinate of the direction vector is 0).
Returns
- Type
- Boolean
Details
- Source
- base/line.js, line 633
isVertical() → {Boolean}
Returns true, if the line is vertical (if the x coordinate of the direction vector is 0).
Returns
- Type
- Boolean
Details
- Source
- base/line.js, line 623
setFixedLength(l) → {JXG.Line}
Set a new fixed length, then update the board.
Parameters
| Name | Type | Description |
|---|---|---|
l |
String | Number | function | A string, function or number describing the new length. |
Returns
Reference to this line
- Type
- JXG.Line
Details
- Source
- base/line.js, line 1106
(private) setLabelRelativeCoords()
Adjusts Label coords relative to Anchor. DESCRIPTION
Details
- Source
- base/line.js, line 673
(private) setStraight(straightFirst, straightLast)
Determines whether the line is drawn beyond JXG.Line#point1 and JXG.Line#point2 and updates the line.
Parameters
| Name | Type | Description |
|---|---|---|
straightFirst |
Boolean | True if the Line shall be drawn beyond JXG.Line#point1, false otherwise. |
straightLast |
Boolean | True if the Line shall be drawn beyond JXG.Line#point2, false otherwise. |
Details
- See
- Source
- base/line.js, line 649
(private) updateRenderer()
Uses the boards renderer to update the line.
Details
- Overrides
- JXG.GeometryElement#updateRenderer
- Source
- base/line.js, line 433
(private) updateSegmentFixedLength()
Update segments with fixed length and at least one movable point.
Details
- Source
- base/line.js, line 322
(private) updateStdform()
Updates the stdform derived from the parent point positions.
Details
- Source
- base/line.js, line 415
Inherited
Events
Own
none
Inherited
Parameters
| Name | Type | Description |
|---|---|---|
board |
String | JXG.Board | The board the new line is drawn on. |
p1 |
Point | Startpoint of the line. |
p2 |
Point | Endpoint of the line. |
attributes |
Object | Javascript object containing attributes like name, id and colors. |
Details
- Source
- base/line.js, line 70