MathUtils class

Utility functions used by both PolyUtils and SphericalUtils.

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Methods

arcHav(double x) → double

Computes the inverse haversine. Numerically stable around 0.

clamp(double x, double low, double high) → double

Restricts x to the range [low, high].

hav(double x) → double

Returns haversine of x (angle in radians).

havDistance(double lat1, double lat2, double dLng) → double

Returns hav() of distance from (lat1, lng1) to (lat2, lng2) on the unit sphere, where dLng = lng1 − lng2.

havFromSin(double x) → double

Returns hav(asin(x)).

inverseMercator(double y) → double

Returns the latitude (in radians) from the Mercator Y coordinate y.

mercator(double lat) → double

Returns the Mercator Y coordinate corresponding to lat (in radians).

mod(double x, double m) → double

Returns the non-negative remainder of x / m.

sinFromHav(double h) → double

Given h == hav(x), returns sin(|x|).

sinSumFromHav(double x, double y) → double

Returns sin(arcHav(x) + arcHav(y)).

wrap(double n, double min, double max) → double

Wraps n into the inclusive-exclusive interval [min, max).

Constants

earthRadius → const double

The earth's mean radius in meters (IUGG).