import type { Nullable } from "../types";
import type { Scene } from "../scene";
import type { Engine } from "../Engines/engine";
import type { AbstractMesh } from "../Meshes/abstractMesh";
import type { Light } from "../Lights/light";
import type { PrePassConfiguration } from "../Materials/prePassConfiguration";
import type { UniformBuffer } from "./uniformBuffer";
import type { Effect, IEffectCreationOptions } from "./effect";
import type { BaseTexture } from "../Materials/Textures/baseTexture";
import type { MaterialDefines } from "./materialDefines";
import type { EffectFallbacks } from "./effectFallbacks";
import type { Material } from "./material";
/**
 * "Static Class" containing the most commonly used helper while dealing with material for rendering purpose.
 *
 * It contains the basic tools to help defining defines, binding uniform for the common part of the materials.
 *
 * This works by convention in BabylonJS but is meant to be use only with shader following the in place naming rules and conventions.
 */
export declare class MaterialHelper {
    /**
     * Binds the scene's uniform buffer to the effect.
     * @param effect defines the effect to bind to the scene uniform buffer
     * @param sceneUbo defines the uniform buffer storing scene data
     */
    static BindSceneUniformBuffer: (effect: Effect, sceneUbo: UniformBuffer) => void;
    /**
     * Helps preparing the defines values about the UVs in used in the effect.
     * UVs are shared as much as we can across channels in the shaders.
     * @param texture The texture we are preparing the UVs for
     * @param defines The defines to update
     * @param key The channel key "diffuse", "specular"... used in the shader
     */
    static PrepareDefinesForMergedUV: (texture: BaseTexture, defines: any, key: string) => void;
    /**
     * Binds a texture matrix value to its corresponding uniform
     * @param texture The texture to bind the matrix for
     * @param uniformBuffer The uniform buffer receiving the data
     * @param key The channel key "diffuse", "specular"... used in the shader
     */
    static BindTextureMatrix: (texture: BaseTexture, uniformBuffer: UniformBuffer, key: string) => void;
    /**
     * Gets the current status of the fog (should it be enabled?)
     * @param mesh defines the mesh to evaluate for fog support
     * @param scene defines the hosting scene
     * @returns true if fog must be enabled
     */
    static GetFogState: (mesh: AbstractMesh, scene: Scene) => boolean;
    /**
     * Helper used to prepare the list of defines associated with misc. values for shader compilation
     * @param mesh defines the current mesh
     * @param scene defines the current scene
     * @param useLogarithmicDepth defines if logarithmic depth has to be turned on
     * @param pointsCloud defines if point cloud rendering has to be turned on
     * @param fogEnabled defines if fog has to be turned on
     * @param alphaTest defines if alpha testing has to be turned on
     * @param defines defines the current list of defines
     * @param applyDecalAfterDetail Defines if the decal is applied after or before the detail
     */
    static PrepareDefinesForMisc: (mesh: AbstractMesh, scene: Scene, useLogarithmicDepth: boolean, pointsCloud: boolean, fogEnabled: boolean, alphaTest: boolean, defines: any, applyDecalAfterDetail?: boolean) => void;
    /**
     * Helper used to prepare the defines relative to the active camera
     * @param scene defines the current scene
     * @param defines specifies the list of active defines
     * @returns true if the defines have been updated, else false
     */
    static PrepareDefinesForCamera: (scene: Scene, defines: any) => boolean;
    /**
     * Helper used to prepare the list of defines associated with frame values for shader compilation
     * @param scene defines the current scene
     * @param engine defines the current engine
     * @param material defines the material we are compiling the shader for
     * @param defines specifies the list of active defines
     * @param useInstances defines if instances have to be turned on
     * @param useClipPlane defines if clip plane have to be turned on
     * @param useThinInstances defines if thin instances have to be turned on
     */
    static PrepareDefinesForFrameBoundValues: (scene: Scene, engine: Engine, material: Material, defines: any, useInstances: boolean, useClipPlane?: Nullable<boolean>, useThinInstances?: boolean) => void;
    /**
     * Prepares the defines for bones
     * @param mesh The mesh containing the geometry data we will draw
     * @param defines The defines to update
     */
    static PrepareDefinesForBones: (mesh: AbstractMesh, defines: any) => void;
    /**
     * Prepares the defines for morph targets
     * @param mesh The mesh containing the geometry data we will draw
     * @param defines The defines to update
     */
    static PrepareDefinesForMorphTargets: (mesh: AbstractMesh, defines: any) => void;
    /**
     * Prepares the defines for baked vertex animation
     * @param mesh The mesh containing the geometry data we will draw
     * @param defines The defines to update
     */
    static PrepareDefinesForBakedVertexAnimation: (mesh: AbstractMesh, defines: any) => void;
    /**
     * Prepares the defines used in the shader depending on the attributes data available in the mesh
     * @param mesh The mesh containing the geometry data we will draw
     * @param defines The defines to update
     * @param useVertexColor Precise whether vertex colors should be used or not (override mesh info)
     * @param useBones Precise whether bones should be used or not (override mesh info)
     * @param useMorphTargets Precise whether morph targets should be used or not (override mesh info)
     * @param useVertexAlpha Precise whether vertex alpha should be used or not (override mesh info)
     * @param useBakedVertexAnimation Precise whether baked vertex animation should be used or not (override mesh info)
     * @returns false if defines are considered not dirty and have not been checked
     */
    static PrepareDefinesForAttributes: (mesh: AbstractMesh, defines: any, useVertexColor: boolean, useBones: boolean, useMorphTargets?: boolean, useVertexAlpha?: boolean, useBakedVertexAnimation?: boolean) => boolean;
    /**
     * Prepares the defines related to multiview
     * @param scene The scene we are intending to draw
     * @param defines The defines to update
     */
    static PrepareDefinesForMultiview: (scene: Scene, defines: any) => void;
    /**
     * Prepares the defines related to order independant transparency
     * @param scene The scene we are intending to draw
     * @param defines The defines to update
     * @param needAlphaBlending Determines if the material needs alpha blending
     */
    static PrepareDefinesForOIT: (scene: Scene, defines: any, needAlphaBlending: boolean) => void;
    /**
     * Prepares the defines related to the prepass
     * @param scene The scene we are intending to draw
     * @param defines The defines to update
     * @param canRenderToMRT Indicates if this material renders to several textures in the prepass
     */
    static PrepareDefinesForPrePass: (scene: Scene, defines: any, canRenderToMRT: boolean) => void;
    /**
     * Prepares the defines related to the light information passed in parameter
     * @param scene The scene we are intending to draw
     * @param mesh The mesh the effect is compiling for
     * @param light The light the effect is compiling for
     * @param lightIndex The index of the light
     * @param defines The defines to update
     * @param specularSupported Specifies whether specular is supported or not (override lights data)
     * @param state Defines the current state regarding what is needed (normals, etc...)
     * @param state.needNormals
     * @param state.needRebuild
     * @param state.shadowEnabled
     * @param state.specularEnabled
     * @param state.lightmapMode
     */
    static PrepareDefinesForLight: (scene: Scene, mesh: AbstractMesh, light: Light, lightIndex: number, defines: any, specularSupported: boolean, state: {
        needNormals: boolean;
        needRebuild: boolean;
        shadowEnabled: boolean;
        specularEnabled: boolean;
        lightmapMode: boolean;
    }) => void;
    /**
     * Prepares the defines related to the light information passed in parameter
     * @param scene The scene we are intending to draw
     * @param mesh The mesh the effect is compiling for
     * @param defines The defines to update
     * @param specularSupported Specifies whether specular is supported or not (override lights data)
     * @param maxSimultaneousLights Specifies how manuy lights can be added to the effect at max
     * @param disableLighting Specifies whether the lighting is disabled (override scene and light)
     * @returns true if normals will be required for the rest of the effect
     */
    static PrepareDefinesForLights: (scene: Scene, mesh: AbstractMesh, defines: any, specularSupported: boolean, maxSimultaneousLights?: number, disableLighting?: boolean) => boolean;
    /**
     * Prepares the uniforms and samplers list to be used in the effect (for a specific light)
     * @param lightIndex defines the light index
     * @param uniformsList The uniform list
     * @param samplersList The sampler list
     * @param projectedLightTexture defines if projected texture must be used
     * @param uniformBuffersList defines an optional list of uniform buffers
     * @param updateOnlyBuffersList True to only update the uniformBuffersList array
     */
    static PrepareUniformsAndSamplersForLight: (lightIndex: number, uniformsList: string[], samplersList: string[], projectedLightTexture?: any, uniformBuffersList?: Nullable<string[]>, updateOnlyBuffersList?: boolean) => void;
    /**
     * Prepares the uniforms and samplers list to be used in the effect
     * @param uniformsListOrOptions The uniform names to prepare or an EffectCreationOptions containing the list and extra information
     * @param samplersList The sampler list
     * @param defines The defines helping in the list generation
     * @param maxSimultaneousLights The maximum number of simultaneous light allowed in the effect
     */
    static PrepareUniformsAndSamplersList: (uniformsListOrOptions: string[] | IEffectCreationOptions, samplersList?: string[], defines?: any, maxSimultaneousLights?: number) => void;
    /**
     * This helps decreasing rank by rank the shadow quality (0 being the highest rank and quality)
     * @param defines The defines to update while falling back
     * @param fallbacks The authorized effect fallbacks
     * @param maxSimultaneousLights The maximum number of lights allowed
     * @param rank the current rank of the Effect
     * @returns The newly affected rank
     */
    static HandleFallbacksForShadows: (defines: any, fallbacks: EffectFallbacks, maxSimultaneousLights?: number, rank?: number) => number;
    /**
     * Prepares the list of attributes required for morph targets according to the effect defines.
     * @param attribs The current list of supported attribs
     * @param mesh The mesh to prepare the morph targets attributes for
     * @param influencers The number of influencers
     */
    static PrepareAttributesForMorphTargetsInfluencers: (attribs: string[], mesh: AbstractMesh, influencers: number) => void;
    /**
     * Prepares the list of attributes required for morph targets according to the effect defines.
     * @param attribs The current list of supported attribs
     * @param mesh The mesh to prepare the morph targets attributes for
     * @param defines The current Defines of the effect
     */
    static PrepareAttributesForMorphTargets: (attribs: string[], mesh: AbstractMesh, defines: any) => void;
    /**
     * Prepares the list of attributes required for baked vertex animations according to the effect defines.
     * @param attribs The current list of supported attribs
     * @param mesh The mesh to prepare for baked vertex animations
     * @param defines The current Defines of the effect
     */
    static PrepareAttributesForBakedVertexAnimation: (attribs: string[], mesh: AbstractMesh, defines: any) => void;
    /**
     * Prepares the list of attributes required for bones according to the effect defines.
     * @param attribs The current list of supported attribs
     * @param mesh The mesh to prepare the bones attributes for
     * @param defines The current Defines of the effect
     * @param fallbacks The current effect fallback strategy
     */
    static PrepareAttributesForBones: (attribs: string[], mesh: AbstractMesh, defines: any, fallbacks: EffectFallbacks) => void;
    /**
     * Check and prepare the list of attributes required for instances according to the effect defines.
     * @param attribs The current list of supported attribs
     * @param defines The current MaterialDefines of the effect
     */
    static PrepareAttributesForInstances: (attribs: string[], defines: MaterialDefines) => void;
    /**
     * Add the list of attributes required for instances to the attribs array.
     * @param attribs The current list of supported attribs
     * @param needsPreviousMatrices If the shader needs previous matrices
     */
    static PushAttributesForInstances: (attribs: string[], needsPreviousMatrices?: boolean) => void;
    /**
     * Binds the light information to the effect.
     * @param light The light containing the generator
     * @param effect The effect we are binding the data to
     * @param lightIndex The light index in the effect used to render
     */
    static BindLightProperties: (light: Light, effect: Effect, lightIndex: number) => void;
    /**
     * Binds the lights information from the scene to the effect for the given mesh.
     * @param light Light to bind
     * @param lightIndex Light index
     * @param scene The scene where the light belongs to
     * @param effect The effect we are binding the data to
     * @param useSpecular Defines if specular is supported
     * @param receiveShadows Defines if the effect (mesh) we bind the light for receives shadows
     */
    static BindLight: (light: Light, lightIndex: number, scene: Scene, effect: Effect, useSpecular: boolean, receiveShadows?: boolean) => void;
    /**
     * Binds the lights information from the scene to the effect for the given mesh.
     * @param scene The scene the lights belongs to
     * @param mesh The mesh we are binding the information to render
     * @param effect The effect we are binding the data to
     * @param defines The generated defines for the effect
     * @param maxSimultaneousLights The maximum number of light that can be bound to the effect
     */
    static BindLights: (scene: Scene, mesh: AbstractMesh, effect: Effect, defines: any, maxSimultaneousLights?: number) => void;
    /**
     * Binds the fog information from the scene to the effect for the given mesh.
     * @param scene The scene the lights belongs to
     * @param mesh The mesh we are binding the information to render
     * @param effect The effect we are binding the data to
     * @param linearSpace Defines if the fog effect is applied in linear space
     */
    static BindFogParameters: (scene: Scene, mesh?: AbstractMesh, effect?: Effect, linearSpace?: boolean) => void;
    /**
     * Binds the bones information from the mesh to the effect.
     * @param mesh The mesh we are binding the information to render
     * @param effect The effect we are binding the data to
     * @param prePassConfiguration Configuration for the prepass, in case prepass is activated
     */
    static BindBonesParameters: (mesh?: AbstractMesh, effect?: Effect, prePassConfiguration?: PrePassConfiguration) => void;
    /**
     * Binds the morph targets information from the mesh to the effect.
     * @param abstractMesh The mesh we are binding the information to render
     * @param effect The effect we are binding the data to
     */
    static BindMorphTargetParameters: (abstractMesh: AbstractMesh, effect: Effect) => void;
    /**
     * Binds the logarithmic depth information from the scene to the effect for the given defines.
     * @param defines The generated defines used in the effect
     * @param effect The effect we are binding the data to
     * @param scene The scene we are willing to render with logarithmic scale for
     */
    static BindLogDepth: (defines: any, effect: Effect, scene: Scene) => void;
}