MathUtil class

Constructors

MathUtil()

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(num x) → num

Computes inverse haversine. Has good numerical stability around 0. arcHav(x) == acos(1 - 2 * x) == 2 * asin(sqrt(x)). The argument must be in 0, 1, and the result is positive.

clamp(num x, num low, num high) → num

Restrict x to the range low, high.

hav(num x) → num

Returns haversine(angle-in-radians). hav(x) == (1 - cos(x)) / 2 == sin(x / 2)^2.

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

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

havFromSin(num x) → num

inverseMercator(num y) → num

Returns latitude from mercator Y.

mercator(num lat) → num

Returns mercator Y corresponding to latitude. See http://en.wikipedia.org/wiki/Mercator_projection .

mod(num x, num m) → num

Returns the non-negative remainder of x / m. @param x The operand. @param m The modulus.

sinFromHav(num h) → num

sinSumFromHav(num x, num y) → num

toDegrees(num rad) → num

toRadians(num degrees) → num

wrap(num n, num min, num max) → num

Wraps the given value into the inclusive-exclusive interval between min and max. @param n The value to wrap. @param min The minimum. @param max The maximum.