import type { Texture } from 'pixi.js';
import type { CubeMipResource } from '../cube';
/**
 * an object containing environment data for Image based lighting in scenes
 *
 * find out more about ibl here:
 * https://learnopengl.com/PBR/IBL/Specular-IBL
 *
 * more info on spherical harmonics here:
 * http://orlandoaguilar.github.io/sh/spherical/harmonics/irradiance/map/2017/02/12/SphericalHarmonics.html
 */
export interface Environment {
    /**
     * the spherical harmonics of an environment. 9 vec3s that represent ambient light
     */
    sphericalHarmonics: Float32Array;
    /**
     * a special cube map that contains special mipmaps that represent roughness stored a RGBE
     * so the shader needs to unpack it on the fly.
     *
     * info here: https://enkimute.github.io/hdrpng.js/
     */
    specularMap: Texture<CubeMipResource>;
}
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