import { Texture, Vector2 } from "three";
import type { IUniform } from "three";
import { GradientTextureOptions } from "@three3d/tools";
import type { GradientData3DOptions } from "../../Data3D";
import { type GradientData3DTexture } from "./GradientData3DTexture";
import { VolumeMaterialUniforms, VolumeMaterialOptions, VolumeMaterial } from "../VolumeMaterial";
/**
 * GradientVolumeMaterial 的 uniforms 类型
 */
export interface GradientVolumeMaterialUniforms extends VolumeMaterialUniforms<GradientData3DTexture> {
    gradient: IUniform<null | Texture>;
    range: IUniform<Vector2>;
    discardOut: IUniform<boolean>;
    voidRange: IUniform<Vector2>;
}
/**
 * 梯度体积材质选项
 */
export interface GradientVolumeMaterialOptions extends VolumeMaterialOptions<GradientData3DTexture>, GradientData3DOptions {
    /**
     * 数值的梯度映射纹理
     */
    gradient?: GradientTextureOptions | null;
}
/**
 * 梯度体积材质
 */
export declare class GradientVolumeMaterial extends VolumeMaterial<GradientData3DTexture, GradientVolumeMaterialUniforms> {
    readonly isGradientVolumeMaterial = true;
    constructor(options?: GradientVolumeMaterialOptions);
    /**
     * 数值的梯度映射纹理
     */
    get gradient(): Texture | null;
    set gradient(value: Texture | null);
    /**
     * 数值的映射区间
     * @remarks
     * x 为最小值，y 为最大值
     *
     * @defaultValue {x:0,y:100}
     */
    get range(): Vector2;
    set range(value: Vector2);
    /**
     * 是否丢弃超出映射范围的数值
     * @remarks
     * 当数值超出映射区间 {@link GradientVolumeMaterial.range}  时，是否丢弃；
     *
     * 包含左右边界值
     * @defaultValue true
     */
    get discardOut(): boolean;
    set discardOut(value: boolean);
    /**
     * 空值的范围
     * @remarks
     * 当数值在此范围中时，会被认为是空的值，渲染时会被丢弃
     *
     * 包含左右边界值
     *
     * @defaultValue {x:-100,y:-1}
     */
    get voidRange(): Vector2;
    set voidRange(value: Vector2);
}
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