Collection of mathy math functions for mathing and animating

AnimationUtils.ts

export type float = number;

/**
 * Interpolate a value with specified extrema, to a new value between new extrema.
 *
 * @param value the current value
 * @param inputMin minimum the input value can reach
 * @param inputMax maximum the input value can reach
 * @param outputMin minimum the output value can reach
 * @param outputMax maximum the output value can reach
 */
export function map(value: float, inputMin: float, inputMax: float, outputMin: float, outputMax: float): float {
  return outputMin + (outputMax - outputMin) * ((value - inputMin) / (inputMax - inputMin));
}

  /**
   * Same as {@link #map}, but clamps the values so they never exceed the extrema.
   */
export function mapClamped(value: float, inputMin: float, inputMax: float, outputMin: float, outputMax: float): float {
  return Math.max(outputMin, Math.min(outputMax, map(value, inputMin, inputMax, outputMin, outputMax)));
}

  /***
   * Interpolate between values a and b.
   */
export function lerp(a: float, b: float, fraction: float): float {
  return (a * (1.0 - fraction)) + (b * fraction);
}