import { DiffuseBasicMethod } from './DiffuseBasicMethod';
import { DiffuseCompositeMethod } from './DiffuseCompositeMethod';
/**
 * DiffuseCelMethod provides a shading method to add diffuse cel (cartoon) shading.
 */
export declare class DiffuseCelMethod extends DiffuseCompositeMethod {
    private _levels;
    private _smoothness;
    static assetType: string;
    /**
     * @inheritDoc
     */
    get assetType(): string;
    /**
     * Creates a new DiffuseCelMethod object.
     * @param levels The amount of shadow gradations.
     * @param baseMethod An optional diffuse method on which the cartoon shading is based. If omitted, DiffuseBasicMethod is used.
     */
    constructor(levels?: number, smoothness?: number, baseMethod?: DiffuseBasicMethod | DiffuseCompositeMethod);
    /**
     * The amount of shadow gradations.
     */
    get levels(): number;
    set levels(value: number);
    /**
     * The smoothness of the edge between 2 shading levels.
     */
    get smoothness(): number;
    set smoothness(value: number);
}
import { ShaderRegisterCache, ShaderRegisterData } from '@awayjs/stage';
import { LightingShader } from '../shaders/LightingShader';
import { _Shader_LightingCompositeMethod } from './CompositeMethodBase';
/**
 * _Shader_DiffuseCelMethod provides a shading method to add diffuse cel (cartoon) shading.
 */
export declare class _Shader_DiffuseCelMethod extends _Shader_LightingCompositeMethod {
    private _method;
    private _shader;
    private _clampDataRegister;
    private _clampDataIndex;
    /**
     * Creates a new _Shader_DiffuseCelMethod object.
     * @param levels The amount of shadow gradations.
     * @param baseMethod An optional diffuse method on which the cartoon shading is based. If omitted, DiffuseBasicMethod is used.
     */
    init(method: DiffuseCelMethod, shader: LightingShader): void;
    /**
     * @inheritDoc
     */
    _initConstants(): void;
    /**
     * @inheritDoc
     */
    _cleanCompilationData(): void;
    /**
     * @inheritDoc
     */
    _getFragmentPreLightingCode(registerCache: ShaderRegisterCache, sharedRegisters: ShaderRegisterData): string;
    /**
     * @inheritDoc
     */
    _activate(): void;
    /**
     * Snaps the diffuse shading of the wrapped method to one of the levels.
     * @param vo The MethodVO used to compile the current shader.
     * @param t The register containing the diffuse strength in the "w" component.
     * @param regCache The register cache used for the shader compilation.
     * @param sharedRegisters The shared register data for this shader.
     * @return The AGAL fragment code for the method.
     */
    private clampDiffuse;
}
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