/**
 * A shader effect that flashes the sprite with a solid color.
 * Commonly used for hit feedback — flash white when the player takes damage.
 * The `intensity` uniform controls how much of the flash color is mixed in
 * (0.0 = original sprite, 1.0 = fully colored).
 * @category Effects
 * @see {@link Renderable.shader} for usage
 * @example
 * // create a white flash effect
 * const flash = new FlashEffect(renderer);
 * mySprite.shader = flash;
 *
 * // trigger the flash (e.g. on hit)
 * flash.setIntensity(1.0);
 *
 * // fade it out over time (e.g. in update loop)
 * flash.setIntensity(flash.intensity - dt / 200);
 * @example
 * // red flash
 * const flash = new FlashEffect(renderer, { color: [1.0, 0.0, 0.0] });
 */
export default class FlashEffect extends ShaderEffect {
    /**
     * @param {import("../webgl_renderer.js").default} renderer - the current renderer instance
     * @param {object} [options] - effect options
     * @param {number[]} [options.color=[1.0, 1.0, 1.0]] - flash color as [r, g, b] (0.0–1.0)
     * @param {number} [options.intensity=0.0] - initial flash intensity (0.0–1.0)
     */
    constructor(renderer: import("../webgl_renderer.js").default, options?: {
        color?: number[] | undefined;
        intensity?: number | undefined;
    });
    intensity: number;
    /**
     * set the flash intensity
     * @param {number} value - flash intensity (0.0 = no flash, 1.0 = fully colored)
     */
    setIntensity(value: number): void;
    /**
     * set the flash color
     * @param {number[]} color - flash color as [r, g, b] (0.0–1.0)
     */
    setColor(color: number[]): void;
}
import ShaderEffect from "../shadereffect.js";
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