/**
 * A material determines how a particular mesh instance is rendered. It specifies the shader and
 * render state that is set before the mesh instance is submitted to the graphics device.
 *
 * @category Graphics
 */
export class Material {
    /**
     * A shader used to render the material. Note that this is used only by materials where the
     * user specifies the shader. Most material types generate multiple shader variants, and do not
     * set this.
     *
     * @type {import('../../platform/graphics/shader.js').Shader}
     * @private
     */
    private _shader;
    /**
     * The mesh instances referencing this material
     *
     * @type {import('../mesh-instance.js').MeshInstance[]}
     * @private
     */
    private meshInstances;
    /**
     * The name of the material.
     *
     * @type {string}
     */
    name: string;
    /**
     * A unique id the user can assign to the material. The engine internally does not use this for
     * anything, and the user can assign a value to this id for any purpose they like. Defaults to
     * an empty string.
     *
     * @type {string}
     */
    userId: string;
    id: number;
    /**
     * The cache of shader variants generated for this material. The key represents the unique
     * variant, the value is the shader.
     *
     * @type {Map<string, import('../../platform/graphics/shader.js').Shader>}
     * @ignore
     */
    variants: Map<string, import("../../platform/graphics/shader.js").Shader>;
    parameters: {};
    /**
     * The alpha test reference value to control which fragments are written to the currently
     * active render target based on alpha value. All fragments with an alpha value of less than
     * the alphaTest reference value will be discarded. alphaTest defaults to 0 (all fragments
     * pass).
     *
     * @type {number}
     */
    alphaTest: number;
    /**
     * Enables or disables alpha to coverage (WebGL2 only). When enabled, and if hardware
     * anti-aliasing is on, limited order-independent transparency can be achieved. Quality depends
     * on the number of MSAA samples of the current render target. It can nicely soften edges of
     * otherwise sharp alpha cutouts, but isn't recommended for large area semi-transparent
     * surfaces. Note, that you don't need to enable blending to make alpha to coverage work. It
     * will work without it, just like alphaTest.
     *
     * @type {boolean}
     */
    alphaToCoverage: boolean;
    /** @ignore */
    _blendState: BlendState;
    /** @ignore */
    _depthState: DepthState;
    /**
     * Controls how triangles are culled based on their face direction with respect to the
     * viewpoint. Can be:
     *
     * - {@link CULLFACE_NONE}: Do not cull triangles based on face direction.
     * - {@link CULLFACE_BACK}: Cull the back faces of triangles (do not render triangles facing
     * away from the view point).
     * - {@link CULLFACE_FRONT}: Cull the front faces of triangles (do not render triangles facing
     * towards the view point).
     *
     * Defaults to {@link CULLFACE_BACK}.
     *
     * @type {number}
     */
    cull: number;
    /**
     * Stencil parameters for front faces (default is null).
     *
     * @type {import('../../platform/graphics/stencil-parameters.js').StencilParameters|null}
     */
    stencilFront: import("../../platform/graphics/stencil-parameters.js").StencilParameters | null;
    /**
     * Stencil parameters for back faces (default is null).
     *
     * @type {import('../../platform/graphics/stencil-parameters.js').StencilParameters|null}
     */
    stencilBack: import("../../platform/graphics/stencil-parameters.js").StencilParameters | null;
    /**
     * Sets the offset for the output depth buffer value. Useful for decals to prevent z-fighting.
     * Typically a small negative value (-0.1) is used to render the mesh slightly closer to the
     * camera.
     *
     * @type {number}
     */
    set depthBias(value: number);
    /**
     * Gets the offset for the output depth buffer value.
     *
     * @type {number}
     */
    get depthBias(): number;
    /**
     * Sets the offset for the output depth buffer value based on the slope of the triangle
     * relative to the camera.
     *
     * @type {number}
     */
    set slopeDepthBias(value: number);
    /**
     * Gets the offset for the output depth buffer value based on the slope of the triangle
     * relative to the camera.
     *
     * @type {number}
     */
    get slopeDepthBias(): number;
    _shaderVersion: number;
    _scene: any;
    dirty: boolean;
    /**
     * Sets whether the red channel is written to the color buffer. If true, the red component of
     * fragments generated by the shader of this material is written to the color buffer of the
     * currently active render target. If false, the red component will not be written. Defaults to
     * true.
     *
     * @type {boolean}
     */
    set redWrite(value: boolean);
    /**
     * Gets whether the red channel is written to the color buffer.
     *
     * @type {boolean}
     */
    get redWrite(): boolean;
    /**
     * Sets whether the green channel is written to the color buffer. If true, the red component of
     * fragments generated by the shader of this material is written to the color buffer of the
     * currently active render target. If false, the green component will not be written. Defaults
     * to true.
     *
     * @type {boolean}
     */
    set greenWrite(value: boolean);
    /**
     * Gets whether the green channel is written to the color buffer.
     *
     * @type {boolean}
     */
    get greenWrite(): boolean;
    /**
     * Sets whether the blue channel is written to the color buffer. If true, the red component of
     * fragments generated by the shader of this material is written to the color buffer of the
     * currently active render target. If false, the blue component will not be written. Defaults
     * to true.
     *
     * @type {boolean}
     */
    set blueWrite(value: boolean);
    /**
     * Gets whether the blue channel is written to the color buffer.
     *
     * @type {boolean}
     */
    get blueWrite(): boolean;
    /**
     * Sets whether the alpha channel is written to the color buffer. If true, the red component of
     * fragments generated by the shader of this material is written to the color buffer of the
     * currently active render target. If false, the alpha component will not be written. Defaults
     * to true.
     *
     * @type {boolean}
     */
    set alphaWrite(value: boolean);
    /**
     * Gets whether the alpha channel is written to the color buffer.
     *
     * @type {boolean}
     */
    get alphaWrite(): boolean;
    /**
     * Sets the shader used by this material to render mesh instances. Defaults to `null`.
     *
     * @type {import('../../platform/graphics/shader.js').Shader|null}
     */
    set shader(shader: import("../../platform/graphics/shader.js").Shader | null);
    /**
     * Gets the shader used by this material to render mesh instances.
     *
     * @type {import('../../platform/graphics/shader.js').Shader|null}
     */
    get shader(): import("../../platform/graphics/shader.js").Shader | null;
    get transparent(): boolean;
    _updateTransparency(): void;
    /**
     * Sets the blend state for this material. Controls how fragment shader outputs are blended
     * when being written to the currently active render target. This overwrites blending type set
     * using {@link Material#blendType}, and offers more control over blending.
     *
     * @type {BlendState}
     */
    set blendState(value: BlendState);
    /**
     * Gets the blend state for this material.
     *
     * @type {BlendState}
     */
    get blendState(): BlendState;
    /**
     * Sets the blend mode for this material. Controls how fragment shader outputs are blended when
     * being written to the currently active render target. Can be:
     *
     * - {@link BLEND_SUBTRACTIVE}: Subtract the color of the source fragment from the destination
     * fragment and write the result to the frame buffer.
     * - {@link BLEND_ADDITIVE}: Add the color of the source fragment to the destination fragment
     * and write the result to the frame buffer.
     * - {@link BLEND_NORMAL}: Enable simple translucency for materials such as glass. This is
     * equivalent to enabling a source blend mode of {@link BLENDMODE_SRC_ALPHA} and a destination
     * blend mode of {@link BLENDMODE_ONE_MINUS_SRC_ALPHA}.
     * - {@link BLEND_NONE}: Disable blending.
     * - {@link BLEND_PREMULTIPLIED}: Similar to {@link BLEND_NORMAL} expect the source fragment is
     * assumed to have already been multiplied by the source alpha value.
     * - {@link BLEND_MULTIPLICATIVE}: Multiply the color of the source fragment by the color of the
     * destination fragment and write the result to the frame buffer.
     * - {@link BLEND_ADDITIVEALPHA}: Same as {@link BLEND_ADDITIVE} except the source RGB is
     * multiplied by the source alpha.
     * - {@link BLEND_MULTIPLICATIVE2X}: Multiplies colors and doubles the result.
     * - {@link BLEND_SCREEN}: Softer version of additive.
     * - {@link BLEND_MIN}: Minimum color. Check app.graphicsDevice.extBlendMinmax for support.
     * - {@link BLEND_MAX}: Maximum color. Check app.graphicsDevice.extBlendMinmax for support.
     *
     * Defaults to {@link BLEND_NONE}.
     *
     * @type {number}
     */
    set blendType(type: number);
    /**
     * Gets the blend mode for this material.
     *
     * @type {number}
     */
    get blendType(): number;
    /**
     * Sets the depth state. Note that this can also be done by using {@link Material#depthTest},
     * {@link Material#depthFunc} and {@link Material#depthWrite}.
     *
     * @type {DepthState}
     */
    set depthState(value: DepthState);
    /**
     * Gets the depth state.
     *
     * @type {DepthState}
     */
    get depthState(): DepthState;
    /**
     * Sets whether depth testing is enabled. If true, fragments generated by the shader of this
     * material are only written to the current render target if they pass the depth test. If
     * false, fragments generated by the shader of this material are written to the current render
     * target regardless of what is in the depth buffer. Defaults to true.
     *
     * @type {boolean}
     */
    set depthTest(value: boolean);
    /**
     * Gets whether depth testing is enabled.
     *
     * @type {boolean}
     */
    get depthTest(): boolean;
    /**
     * Sets the depth test function. Controls how the depth of new fragments is compared against
     * the current depth contained in the depth buffer. Can be:
     *
     * - {@link FUNC_NEVER}: don't draw
     * - {@link FUNC_LESS}: draw if new depth < depth buffer
     * - {@link FUNC_EQUAL}: draw if new depth == depth buffer
     * - {@link FUNC_LESSEQUAL}: draw if new depth <= depth buffer
     * - {@link FUNC_GREATER}: draw if new depth > depth buffer
     * - {@link FUNC_NOTEQUAL}: draw if new depth != depth buffer
     * - {@link FUNC_GREATEREQUAL}: draw if new depth >= depth buffer
     * - {@link FUNC_ALWAYS}: always draw
     *
     * Defaults to {@link FUNC_LESSEQUAL}.
     *
     * @type {number}
     */
    set depthFunc(value: number);
    /**
     * Gets the depth test function.
     *
     * @type {number}
     */
    get depthFunc(): number;
    /**
     * Sets whether depth writing is enabled. If true, fragments generated by the shader of this
     * material write a depth value to the depth buffer of the currently active render target. If
     * false, no depth value is written. Defaults to true.
     *
     * @type {boolean}
     */
    set depthWrite(value: boolean);
    /**
     * Gets whether depth writing is enabled.
     *
     * @type {boolean}
     */
    get depthWrite(): boolean;
    /**
     * Copy a material.
     *
     * @param {Material} source - The material to copy.
     * @returns {Material} The destination material.
     */
    copy(source: Material): Material;
    /**
     * Clone a material.
     *
     * @returns {this} A newly cloned material.
     */
    clone(): this;
    _updateMeshInstanceKeys(): void;
    updateUniforms(device: any, scene: any): void;
    getShaderVariant(device: any, scene: any, objDefs: any, unused: any, pass: any, sortedLights: any, viewUniformFormat: any, viewBindGroupFormat: any, vertexFormat: any): import("../../platform/graphics/shader.js").Shader;
    /**
     * Applies any changes made to the material's properties.
     */
    update(): void;
    clearParameters(): void;
    getParameters(): {};
    clearVariants(): void;
    /**
     * Retrieves the specified shader parameter from a material.
     *
     * @param {string} name - The name of the parameter to query.
     * @returns {object} The named parameter.
     */
    getParameter(name: string): object;
    /**
     * Sets a shader parameter on a material.
     *
     * @param {string} name - The name of the parameter to set.
     * @param {number|number[]|Float32Array|import('../../platform/graphics/texture.js').Texture} data -
     * The value for the specified parameter.
     */
    setParameter(name: string, data: number | number[] | Float32Array | import("../../platform/graphics/texture.js").Texture): void;
    /**
     * Deletes a shader parameter on a material.
     *
     * @param {string} name - The name of the parameter to delete.
     */
    deleteParameter(name: string): void;
    setParameters(device: any, names: any): void;
    /**
     * Removes this material from the scene and possibly frees up memory from its shaders (if there
     * are no other materials using it).
     */
    destroy(): void;
    /**
     * Registers mesh instance as referencing the material.
     *
     * @param {import('../mesh-instance.js').MeshInstance} meshInstance - The mesh instance to
     * register.
     * @ignore
     */
    addMeshInstanceRef(meshInstance: import("../mesh-instance.js").MeshInstance): void;
    /**
     * De-registers mesh instance as referencing the material.
     *
     * @param {import('../mesh-instance.js').MeshInstance} meshInstance - The mesh instance to
     * de-register.
     * @ignore
     */
    removeMeshInstanceRef(meshInstance: import("../mesh-instance.js").MeshInstance): void;
}
import { BlendState } from '../../platform/graphics/blend-state.js';
import { DepthState } from '../../platform/graphics/depth-state.js';