# All files / fast-colors/src math-utilities.ts

48.89% Statements 22/45
52.78% Branches 19/36
70% Functions 7/10
48.89% Lines 22/45

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     /**
     * Ensures that an input number does not exceed a max value and is not less than a min value.
     * @param i - the number to clamp
     * @param min - the maximum (inclusive) value
     * @param max - the minimum (inclusive) value
     * @public
     */
    export function clamp(i: number, min: number, max: number): number {
        if (isNaN(i) || i <= min) {
            return min;
        } else if (i >= max) {
            return max;
        }
        return i;
    }

    /**
     * Scales an input to a number between 0 and 1
     * @param i - a number between min and max
     * @param min - the max value
     * @param max - the min value
     * @public
     */
    export function normalize(i: number, min: number, max: number): number {
        if (isNaN(i) || i <= min) {
            return 0.0;
        } else if (i >= max) {
            return 1.0;
        }
        return i / (max - min);
    }

    /**
     * Scales a number between 0 and 1
     * @param i - the number to denormalize
     * @param min - the min value
     * @param max - the max value
     * @public
     */
    export function denormalize(i: number, min: number, max: number): number {
        Iif (isNaN(i)) {
            return min;
        }
        return min + i * (max - min);
    }

    /**
     * Converts degrees to radians.
     * @param i - degrees
     * @public
     */
    export function degreesToRadians(i: number): number {
        return i * (Math.PI / 180.0);
    }

    /**
     * Converts radians to degrees.
     * @param i - radians
     * @public
     */
    export function radiansToDegrees(i: number): number {
        return i * (180.0 / Math.PI);
    }

    /**
     * Converts a number between 0 and 255 to a hex string.
     * @param i - the number to convert to a hex string
     * @public
     */
    export function getHexStringForByte(i: number): string {
        const s: string = Math.round(clamp(i, 0.0, 255.0)).toString(16);
        if (s.length === 1) {
            return "0" + s;
        }
        return s;
    }

    /**
     * Linearly interpolate
     * @public
     */
    export function lerp(i: number, min: number, max: number): number {
        Iif (isNaN(i) || i <= 0.0) {
            return min;
        } else Iif (i >= 1.0) {
            return max;
        }
        return min + i * (max - min);
    }

    /**
     * Linearly interpolate angles in degrees
     * @public
     */
    export function lerpAnglesInDegrees(i: number, min: number, max: number): number {
        if (i <= 0.0) {
            return min % 360.0;
        } else if (i >= 1.0) {
            return max % 360.0;
        }
        const a: number = (min - max + 360.0) % 360.0;
        const b: number = (max - min + 360.0) % 360.0;
        if (a <= b) {
            return (min - a * i + 360.0) % 360.0;
        }
        return (min + a * i + 360.0) % 360.0;
    }

    const TwoPI: number = Math.PI * 2;

    /**
     * Linearly interpolate angles in radians
     * @public
     */
    export function lerpAnglesInRadians(i: number, min: number, max: number): number {
        if (isNaN(i) || i <= 0.0) {
            return min % TwoPI;
        } else if (i >= 1.0) {
            return max % TwoPI;
        }
        const a: number = (min - max + TwoPI) % TwoPI;
        const b: number = (max - min + TwoPI) % TwoPI;
        if (a <= b) {
            return (min - a * i + TwoPI) % TwoPI;
        }
        return (min + a * i + TwoPI) % TwoPI;
    }

    /**
     *
     * Will return infinity if i*10^(precision) overflows number
     * note that floating point rounding rules come into play here
     * so values that end up rounding on a .5 round to the nearest
     * even not always up so 2.5 rounds to 2
     * @param i - the number to round
     * @param precision - the precision to round to
     *
     * @public
     */
    export function roundToPrecisionSmall(i: number, precision: number): number {
        const factor: number = Math.pow(10, precision);
        return Math.round(i * factor) / factor;
    }