/**
 * A shader effect that adds a colored glow around the sprite.
 * Similar to OutlineEffect but with a soft, blurred edge instead of a hard line.
 * Commonly used for power-ups, magic items, or selection highlights.
 * @category Effects
 * @see {@link Renderable.shader} for usage
 * @example
 * // blue glow for a magic item
 * mySprite.shader = new GlowEffect(renderer, {
 *     color: [0.2, 0.5, 1.0],
 *     intensity: 1.5,
 * });
 */
export default class GlowEffect 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]] - glow color as [r, g, b] (0.0–1.0)
     * @param {number} [options.width=3.0] - glow spread in pixels
     * @param {number} [options.intensity=1.0] - glow brightness multiplier
     * @param {number[]} [options.textureSize=[256, 256]] - texture dimensions [width, height]
     */
    constructor(renderer: import("../webgl_renderer.js").default, options?: {
        color?: number[] | undefined;
        width?: number | undefined;
        intensity?: number | undefined;
        textureSize?: number[] | undefined;
    });
    intensity: number;
    /**
     * set the glow color
     * @param {number[]} color - glow color as [r, g, b] (0.0–1.0)
     */
    setColor(color: number[]): void;
    /**
     * set the glow intensity
     * @param {number} value - glow brightness multiplier
     */
    setIntensity(value: number): void;
    /**
     * set the texture size
     * @param {number} width - texture width in pixels
     * @param {number} height - texture height in pixels
     */
    setTextureSize(width: number, height: number): void;
}
import ShaderEffect from "../shadereffect.js";
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