Mathematical constants and functions, plus a random number generator.

To use this library in your code:

import 'dart:math';

Random

Random is a generator ofbool,int ordouble values.

var intValue = Random().nextInt(10); // Value is >= 0 and < 10.var doubleValue = Random().nextDouble(); // Value is >= 0.0 and < 1.0.var boolValue = Random().nextBool(); // true or false, with equal chance.

Point

Point is a utility class for representing two-dimensional positions.

var leftTop = const Point(0, 0);var rightBottom = const Point(200, 400);

Rectangle

Rectangle is a class for representing two-dimensional axis-alignedrectangles whose properties are immutable.

Create a rectangle spanned by the points.

var leftTop = const Point(20, 50);var rightBottom = const Point(300, 600);var rectangle = Rectangle.fromPoints(leftTop, rightBottom);print(rectangle.left); // 20print(rectangle.top); // 50print(rectangle.right); // 300print(rectangle.bottom); // 600

Create a rectangle spanned by(left, top) and(left+width, top+height).

var rectangle = const Rectangle(20, 50, 300, 600);print(rectangle.left); // 20print(rectangle.top); // 50print(rectangle.right); // 320print(rectangle.bottom); // 650

MutableRectangle

MutableRectangle is a class for representing two-dimensional axis-alignedrectangles with mutable properties.

Create a mutable rectangle spanned by(left, top) and(left+width, top+height).

var rectangle = MutableRectangle(20, 50, 300, 600);print(rectangle); // Rectangle (20, 50) 300 x 600print(rectangle.left); // 20print(rectangle.top); // 50print(rectangle.right); // 320print(rectangle.bottom); // 650// Change rectangle width and height.rectangle.width = 200;rectangle.height = 100;print(rectangle); // Rectangle (20, 50) 200 x 100print(rectangle.left); // 20print(rectangle.top); // 50print(rectangle.right); // 220print(rectangle.bottom); // 150

Classes

MutableRectangle<T extendsnum>

A class for representing two-dimensional axis-aligned rectangles withmutable properties.

Point<T extendsnum>

A utility class for representing two-dimensional positions.

Random

A generator of random bool, int, or double values.

Rectangle<T extendsnum>

A class for representing two-dimensional rectangles whose properties areimmutable.

Constants

e→ constdouble

Base of the natural logarithms.

ln10→ constdouble

Natural logarithm of 10.

ln2→ constdouble

Natural logarithm of 2.

log10e→ constdouble

Base-10 logarithm ofe.

log2e→ constdouble

Base-2 logarithm ofe.

pi→ constdouble

The PI constant.

sqrt1_2→ constdouble

Square root of 1/2.

sqrt2→ constdouble

Square root of 2.

Functions

acos(numx)→double

Convertsx to adouble and returns its arc cosine in radians.

asin(numx)→double

Convertsx to adouble and returns its arc sine in radians.

atan(numx)→double

Convertsx to adouble and returns its arc tangent in radians.

atan2(numa,numb)→double

A variant ofatan.

cos(numradians)→double

Convertsradians to adouble and returns the cosine of the value.

exp(numx)→double

Convertsx to adouble and returns the natural exponent,e,to the powerx.

log(numx)→double

Convertsx to adouble and returns the natural logarithm of the value.

max<T extendsnum>(Ta,Tb)→ T

Returns the larger of two numbers.

min<T extendsnum>(Ta,Tb)→ T

Returns the lesser of two numbers.

pow(numx,numexponent)→num

Returnsx to the power ofexponent.

sin(numradians)→double

Convertsradians to adouble and returns the sine of the value.

sqrt(numx)→double

Convertsx to adouble and returns the positive square root of thevalue.

tan(numradians)→double

Convertsradians to adouble and returns the tangent of the value.