Envelope class - dart_jts library

Constructors

Envelope(double x1, double x2, double y1, double y2): Creates an Envelope for a region defined by maximum and minimum values.
Envelope.empty(): Creates a null Envelope.
Envelope.fromCoordinate(Coordinate p): Creates an Envelope for a region defined by a single Coordinate.
Envelope.fromCoordinates(Coordinate p1, Coordinate p2): Creates an Envelope for a region defined by two Coordinates.
Envelope.fromEnvelope(Envelope env): Create an Envelope from an existing Envelope.

Properties

hashCode → int: The hash code for this object.
read-onlyoverride
runtimeType → Type: A representation of the runtime type of the object.
read-onlyinherited

Methods

centre() → Coordinate?: Computes the coordinate of the centre of this envelope (as long as it is non-null
compareTo(Object o) → int: Compares two envelopes using lexicographic ordering. The ordering comparison is based on the usual numerical comparison between the sequence of ordinates. Null envelopes are less than all non-null envelopes.
contains(double x, double y) → bool: Tests if the given point lies in or on the envelope.
containsCoordinate(Coordinate p) → bool: Tests if the given point lies in or on the envelope.
containsEnvelope(Envelope other) → bool: Tests if the Envelope other lies wholely inside this Envelope (inclusive of the boundary).
copy() → Envelope: Creates a copy of this envelope object.
covers(double x, double y) → bool: Tests if the given point lies in or on the envelope.
coversCoordinate(Coordinate p) → bool: Tests if the given point lies in or on the envelope.
coversEnvelope(Envelope other) → bool: Tests if the Envelope other lies wholely inside this Envelope (inclusive of the boundary).
disjoint(Envelope other) → bool: Tests if the region defined by other is disjoint from the region of this Envelope.
distance(Envelope env) → double: Computes the distance between this and another Envelope. The distance between overlapping Envelopes is 0. Otherwise, the distance is the Euclidean distance between the closest points.
expandBy(double deltaX, double deltaY) → void: Expands this envelope by a given distance in all directions. Both positive and negative distances are supported.
expandByDistance(double distance) → void: Expands this envelope by a given distance in all directions. Both positive and negative distances are supported.
expandToInclude(double x, double y) → void: Enlarges this Envelope so that it contains the given point. Has no effect if the point is already on or within the envelope.
expandToIncludeCoordinate(Coordinate p) → void: Enlarges this Envelope so that it contains the given {@link Coordinate}. Has no effect if the point is already on or within the envelope.
expandToIncludeEnvelope(Envelope other) → void: Enlarges this Envelope so that it contains the other Envelope. Has no effect if other is wholly on or within the envelope.
getArea() → double: Gets the area of this envelope.
getDiameter() → double: Gets the length of the diameter (diagonal) of the envelope.
getHeight() → double: Returns the difference between the maximum and minimum y values.
getMaxX() → double: Returns the Envelopes maximum x-value. min x > max x indicates that this is a null Envelope.
getMaxY() → double: Returns the Envelopes maximum y-value. min y > max y indicates that this is a null Envelope.
getMinX() → double: Returns the Envelopes minimum x-value. min x > max x indicates that this is a null Envelope.
getMinY() → double: Returns the Envelopes minimum y-value. min y > max y indicates that this is a null Envelope.
getWidth() → double: Returns the difference between the maximum and minimum x values.
init(double x1, double x2, double y1, double y2) → void: Initialize an Envelope for a region defined by maximum and minimum values.
initEmpty() → void: Initialize to a null Envelope.
initFromCoordinate(Coordinate p) → void: Initialize an Envelope to a region defined by a single Coordinate.
initFromCoordinates(Coordinate p1, Coordinate p2) → void: Initialize an Envelope to a region defined by two Coordinates.
initFromEnvelope(Envelope env) → void: Initialize an Envelope from an existing Envelope.
intersection(Envelope env) → Envelope: Computes the intersection of two {@link Envelope}s.
intersects(double x, double y) → bool: Check if the point (x, y) intersects (lies inside) the region of this Envelope.
intersectsCoordinate(Coordinate p) → bool: Tests if the point p intersects (lies inside) the region of this Envelope.
intersectsEnvelope(Envelope other) → bool: Tests if the region defined by other intersects the region of this Envelope.
intersectsEnvelopeCoordinates(Coordinate a, Coordinate b) → bool: Tests if the extent defined by two extremal points intersects the extent of this Envelope.
isNull() → bool: Returns true if this Envelope is a "null" envelope.
maxExtent() → double: Gets the maximum extent of this envelope across both dimensions.
minExtent() → double: Gets the minimum extent of this envelope across both dimensions.
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
setToNull() → void: Makes this Envelope a "null" envelope, that is, the envelope of the empty geometry.
toString() → String: A string representation of this object.
override
translate(double transX, double transY) → void: Translates this envelope by given amounts in the X and Y direction.

Operators

operator ==(Object other) → bool: The equality operator.
override

Static Methods

intersectsEnvelopeCoords(Coordinate p1, Coordinate p2, Coordinate q1, Coordinate q2) → bool: Tests whether the envelope defined by p1-p2 and the envelope defined by q1-q2 intersect.
intersectsPoint(Coordinate p1, Coordinate p2, Coordinate q) → bool: Test the point q to see whether it intersects the Envelope defined by p1-p2 @param p1 one extremal point of the envelope @param p2 another extremal point of the envelope @param q the point to test for intersection @return true if q intersects the envelope p1-p2