LineSegment class

A directed line segment between two Points in Screen pixels.

Constructors

LineSegment(Mappoint start, Mappoint end)

Ctor with given start and end point

LineSegment.direction(Mappoint start, Mappoint direction, double distance)

Ctor with given start point, a point that defines the direction of the line and a length

Properties

end → Mappoint

final

hashCode → int

The hash code for this object.

no setter, override

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

start → Mappoint

final

Methods

angleTo(LineSegment other) → double

Computes the angle between this LineSegment and another one.

clipToRectangle(Rectangle<num> r) → LineSegment?

Intersection of this LineSegment with the Rectangle as another LineSegment.

getAngle() → double

Returns the degree of this segment. 0 means vector to the right side --> Since positive values in y-direction points towards the bottom of the screen the angle runs clockwise.

getTheta() → double

Returns the theta of this segment in radians. 0 means vector to the right side --> Since positive values in y-direction points towards the bottom of the screen the angle runs clockwise. see https://de.wikipedia.org/wiki/Arkustangens_und_Arkuskotangens#/media/Datei:Arctangent.svg

intersectsRectangle(Rectangle<num> r, bool bias) → bool

Returns a fast computation if the line intersects the rectangle or bias if there is no fast way to compute the intersection.

length() → double

Euclidian distance between start and end.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

pointAlongLineSegment(double distance) → Mappoint

Computes a Point along the line segment with a given distance to the start Point.

reverse() → LineSegment

New line segment with start and end reversed.

subSegment(double offset, [double length = -1]) → LineSegment

LineSegment that starts at offset from start and runs for length towards end point

toDegrees(double var0) → double

Returns the degree given by the radian value

toString() → String

A string representation of this object.

override

Operators

operator ==(Object other) → bool

The equality operator.

override

Static Properties

BOTTOM ↔ int

getter/setter pair

INSIDE ↔ int

getter/setter pair

LEFT ↔ int

getter/setter pair

RIGHT ↔ int

getter/setter pair

TOP ↔ int

getter/setter pair

Static Methods

code(Rectangle<num> r, Mappoint p) → int

Computes the location code according to Cohen-Sutherland, see https://en.wikipedia.org/wiki/Cohen%E2%80%93Sutherland_algorithm.