constructor( parameters ) {

		super();

		/**
		 * This flag can be used for type testing.
		 *
		 * @type {boolean}
		 * @readonly
		 * @default true
		 */
		this.isMeshToonMaterial = true;

		this.defines = { 'TOON': '' };

		this.type = 'MeshToonMaterial';

		/**
		 * Color of the material.
		 *
		 * @type {Color}
		 * @default (1,1,1)
		 */
		this.color = new Color( 0xffffff );

		/**
		 * The color map. May optionally include an alpha channel, typically combined
		 * with {@link Material#transparent} or {@link Material#alphaTest}. The texture map
		 * color is modulated by the diffuse `color`.
		 *
		 * @type {?Texture}
		 * @default null
		 */
		this.map = null;

		/**
		 * Gradient map for toon shading. It's required to set
		 * {@link Texture#minFilter} and {@link Texture#magFilter} to {@linkNearestFilter}
		 * when using this type of texture.
		 *
		 * @type {?Texture}
		 * @default null
		 */
		this.gradientMap = null;

		/**
		 * The light map. Requires a second set of UVs.
		 *
		 * @type {?Texture}
		 * @default null
		 */
		this.lightMap = null;

		/**
		 * Intensity of the baked light.
		 *
		 * @type {number}
		 * @default 1
		 */
		this.lightMapIntensity = 1.0;

		/**
		 * The red channel of this texture is used as the ambient occlusion map.
		 * Requires a second set of UVs.
		 *
		 * @type {?Texture}
		 * @default null
		 */
		this.aoMap = null;

		/**
		 * Intensity of the ambient occlusion effect. Range is `[0,1]`, where `0`
		 * disables ambient occlusion. Where intensity is `1` and the AO map's
		 * red channel is also `1`, ambient light is fully occluded on a surface.
		 *
		 * @type {number}
		 * @default 1
		 */
		this.aoMapIntensity = 1.0;

		/**
		 * Emissive (light) color of the material, essentially a solid color
		 * unaffected by other lighting.
		 *
		 * @type {Color}
		 * @default (0,0,0)
		 */
		this.emissive = new Color( 0x000000 );

		/**
		 * Intensity of the emissive light. Modulates the emissive color.
		 *
		 * @type {number}
		 * @default 1
		 */
		this.emissiveIntensity = 1.0;

		/**
		 * Set emissive (glow) map. The emissive map color is modulated by the
		 * emissive color and the emissive intensity. If you have an emissive map,
		 * be sure to set the emissive color to something other than black.
		 *
		 * @type {?Texture}
		 * @default null
		 */
		this.emissiveMap = null;

		/**
		 * The texture to create a bump map. The black and white values map to the
		 * perceived depth in relation to the lights. Bump doesn't actually affect
		 * the geometry of the object, only the lighting. If a normal map is defined
		 * this will be ignored.
		 *
		 * @type {?Texture}
		 * @default null
		 */
		this.bumpMap = null;

		/**
		 * How much the bump map affects the material. Typical range is `[0,1]`.
		 *
		 * @type {number}
		 * @default 1
		 */
		this.bumpScale = 1;

		/**
		 * The texture to create a normal map. The RGB values affect the surface
		 * normal for each pixel fragment and change the way the color is lit. Normal
		 * maps do not change the actual shape of the surface, only the lighting. In
		 * case the material has a normal map authored using the left handed
		 * convention, the `y` component of `normalScale` should be negated to compensate
		 * for the different handedness.
		 *
		 * @type {?Texture}
		 * @default null
		 */
		this.normalMap = null;

		/**
		 * The type of normal map.
		 *
		 * @type {(TangentSpaceNormalMap|ObjectSpaceNormalMap)}
		 * @default TangentSpaceNormalMap
		 */
		this.normalMapType = TangentSpaceNormalMap;

		/**
		 * How much the normal map affects the material. Typical value range is `[0,1]`.
		 *
		 * @type {Vector2}
		 * @default (1,1)
		 */
		this.normalScale = new Vector2( 1, 1 );

		/**
		 * The displacement map affects the position of the mesh's vertices. Unlike
		 * other maps which only affect the light and shade of the material the
		 * displaced vertices can cast shadows, block other objects, and otherwise
		 * act as real geometry. The displacement texture is an image where the value
		 * of each pixel (white being the highest) is mapped against, and
		 * repositions, the vertices of the mesh.
		 *
		 * @type {?Texture}
		 * @default null
		 */
		this.displacementMap = null;

		/**
		 * How much the displacement map affects the mesh (where black is no
		 * displacement, and white is maximum displacement). Without a displacement
		 * map set, this value is not applied.
		 *
		 * @type {number}
		 * @default 0
		 */
		this.displacementScale = 1;

		/**
		 * The offset of the displacement map's values on the mesh's vertices.
		 * The bias is added to the scaled sample of the displacement map.
		 * Without a displacement map set, this value is not applied.
		 *
		 * @type {number}
		 * @default 0
		 */
		this.displacementBias = 0;

		/**
		 * The alpha map is a grayscale texture that controls the opacity across the
		 * surface (black: fully transparent; white: fully opaque).
		 *
		 * Only the color of the texture is used, ignoring the alpha channel if one
		 * exists. For RGB and RGBA textures, the renderer will use the green channel
		 * when sampling this texture due to the extra bit of precision provided for
		 * green in DXT-compressed and uncompressed RGB 565 formats. Luminance-only and
		 * luminance/alpha textures will also still work as expected.
		 *
		 * @type {?Texture}
		 * @default null
		 */
		this.alphaMap = null;

		/**
		 * Renders the geometry as a wireframe.
		 *
		 * @type {boolean}
		 * @default false
		 */
		this.wireframe = false;

		/**
		 * Controls the thickness of the wireframe.
		 *
		 * Can only be used with {@link SVGRenderer}.
		 *
		 * @type {number}
		 * @default 1
		 */
		this.wireframeLinewidth = 1;

		/**
		 * Defines appearance of wireframe ends.
		 *
		 * Can only be used with {@link SVGRenderer}.
		 *
		 * @type {('round'|'bevel'|'miter')}
		 * @default 'round'
		 */
		this.wireframeLinecap = 'round';

		/**
		 * Defines appearance of wireframe joints.
		 *
		 * Can only be used with {@link SVGRenderer}.
		 *
		 * @type {('round'|'bevel'|'miter')}
		 * @default 'round'
		 */
		this.wireframeLinejoin = 'round';

		/**
		 * Whether the material is affected by fog or not.
		 *
		 * @type {boolean}
		 * @default true
		 */
		this.fog = true;

		this.setValues( parameters );

	}
Constructs a new mesh toon material.

@param {Object} [parameters] - An object with one or more properties
defining the material's appearance. Any property of the material
(including any property from inherited materials) can be passed
in here. Color values can be passed any type of value accepted
by {@link Color#set}.