screencalc/lib/ScreenMath.d.ts

Calculate data about any display (width, height, ratio, area, density, etc.)

/** Calculate the height of a rectangle from its ratio and area */
export declare function heightFromRatioAndArea(ratio: number, area: number): number;
/** Calculate the physical height of a rectangle from its ratio and diagonal size */
export declare function physicalHeightFromRatioAndDiagonalSize(ratio: number, diagonalSize: number): number;
/**
 * Calculates the simplest fraction for a floating point number using continued fractions
 * (based on http://en.wikipedia.org/wiki/Continued_fraction#Infinite_continued_fractions)
 * Returns an array containing the numerator and denominator of the simplified fraction.
 * @param f The number to calculate the simplest fraction for
 * @param epsilon A number between 0 and 1 which determines precision. Values closer to
 *                zero increase precision. Defaults to a magic number which returns the
 *                "expected" ratio for common screen resolutions.
 */
export declare function calculateSimplestFraction(f: number, epsilon?: number): [number, number];
/** Returns true if the specified value is a positive integer */
export declare function isPositiveInt(val: any): boolean;
/** Returns true if the value is a positive number */
export declare function isPositiveNum(val: any): boolean;