/**
 * Interpolates between two values based on a given proportion.
 * Supports interpolation of numbers, arrays, or defaults to step interpolation for other types.
 *
 * @param a The starting value.
 * @param b The ending value.
 * @param prop The proportion for interpolation (0 to 1).
 * @returns The interpolated value.
 */
export declare function interpolate(a: any, b: any, prop: number): any;
/**
 * Adds a scaled value to another value, supporting numbers, arrays, or step addition for other types.
 *
 * @param a - The base value.
 * @param b - The value to add, scaled by the proportion.
 * @param prop - The scaling proportion for the value to add.
 * @returns The result of adding the scaled value to the base value.
 */
export declare function addBlend(a: any, b: any, prop: number): any;