import { AnimationCurve, ColorGradient, ColorLike } from '../types';
export declare class AnimationSystem {
    /**
     * Interpolate between two values using an animation curve
     */
    static interpolateValue(start: number, end: number, progress: number, curve?: AnimationCurve): number;
    /**
     * Interpolate between keyframes
     */
    private static interpolateKeyframes;
    /**
     * Interpolate color using gradient
     */
    static interpolateColor(gradient: ColorGradient, progress: number): ColorLike;
    /**
     * Convert degrees to radians
     */
    static degreesToRadians(degrees: number): number;
    /**
     * Apply easing function
     */
    static ease(t: number, type?: 'in' | 'out' | 'inOut'): number;
}
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