Material

new Cesium.Material(options)

A Material defines surface appearance through a combination of diffuse, specular, normal, emission, and alpha components. These values are specified using a JSON schema called Fabric which gets parsed and assembled into glsl shader code behind-the-scenes. Check out the wiki page for more details on Fabric.

Base material types and their uniforms:
  • Color
    • color: rgba color object.
  • Image
    • image: path to image.
    • repeat: Object with x and y values specifying the number of times to repeat the image.
  • DiffuseMap
    • image: path to image.
    • channels: Three character string containing any combination of r, g, b, and a for selecting the desired image channels.
    • repeat: Object with x and y values specifying the number of times to repeat the image.
  • AlphaMap
    • image: path to image.
    • channel: One character string containing r, g, b, or a for selecting the desired image channel.
    • repeat: Object with x and y values specifying the number of times to repeat the image.
  • SpecularMap
    • image: path to image.
    • channel: One character string containing r, g, b, or a for selecting the desired image channel.
    • repeat: Object with x and y values specifying the number of times to repeat the image.
  • EmissionMap
    • image: path to image.
    • channels: Three character string containing any combination of r, g, b, and a for selecting the desired image channels.
    • repeat: Object with x and y values specifying the number of times to repeat the image.
  • BumpMap
    • image: path to image.
    • channel: One character string containing r, g, b, or a for selecting the desired image channel.
    • repeat: Object with x and y values specifying the number of times to repeat the image.
    • strength: Bump strength value between 0.0 and 1.0 where 0.0 is small bumps and 1.0 is large bumps.
  • NormalMap
    • image: path to image.
    • channels: Three character string containing any combination of r, g, b, and a for selecting the desired image channels.
    • repeat: Object with x and y values specifying the number of times to repeat the image.
    • strength: Bump strength value between 0.0 and 1.0 where 0.0 is small bumps and 1.0 is large bumps.
  • Grid
    • color: rgba color object for the whole material.
    • cellAlpha: Alpha value for the cells between grid lines. This will be combined with color.alpha.
    • lineCount: Object with x and y values specifying the number of columns and rows respectively.
    • lineThickness: Object with x and y values specifying the thickness of grid lines (in pixels where available).
    • lineOffset: Object with x and y values specifying the offset of grid lines (range is 0 to 1).
  • Stripe
    • horizontal: Boolean that determines if the stripes are horizontal or vertical.
    • evenColor: rgba color object for the stripe's first color.
    • oddColor: rgba color object for the stripe's second color.
    • offset: Number that controls at which point into the pattern to begin drawing; with 0.0 being the beginning of the even color, 1.0 the beginning of the odd color, 2.0 being the even color again, and any multiple or fractional values being in between.
    • repeat: Number that controls the total number of stripes, half light and half dark.
  • Checkerboard
    • lightColor: rgba color object for the checkerboard's light alternating color.
    • darkColor: rgba color object for the checkerboard's dark alternating color.
    • repeat: Object with x and y values specifying the number of columns and rows respectively.
  • Dot
    • lightColor: rgba color object for the dot color.
    • darkColor: rgba color object for the background color.
    • repeat: Object with x and y values specifying the number of columns and rows of dots respectively.
  • Water
    • baseWaterColor: rgba color object base color of the water.
    • blendColor: rgba color object used when blending from water to non-water areas.
    • specularMap: Single channel texture used to indicate areas of water.
    • normalMap: Normal map for water normal perturbation.
    • frequency: Number that controls the number of waves.
    • normalMap: Normal map for water normal perturbation.
    • animationSpeed: Number that controls the animations speed of the water.
    • amplitude: Number that controls the amplitude of water waves.
    • specularIntensity: Number that controls the intensity of specular reflections.
  • RimLighting
    • color: diffuse color and alpha.
    • rimColor: diffuse color and alpha of the rim.
    • width: Number that determines the rim's width.
  • Fade
    • fadeInColor: diffuse color and alpha at time
    • fadeOutColor: diffuse color and alpha at maximumDistance from time
    • maximumDistance: Number between 0.0 and 1.0 where the fadeInColor becomes the fadeOutColor. A value of 0.0 gives the entire material a color of fadeOutColor and a value of 1.0 gives the the entire material a color of fadeInColor
    • repeat: true if the fade should wrap around the texture coodinates.
    • fadeDirection: Object with x and y values specifying if the fade should be in the x and y directions.
    • time: Object with x and y values between 0.0 and 1.0 of the fadeInColor position
  • PolylineArrow
    • color: diffuse color and alpha.
  • PolylineDash
    • color: color for the line.
    • gapColor: color for the gaps in the line.
    • dashLength: Dash length in pixels.
    • dashPattern: The 16 bit stipple pattern for the line..
  • PolylineGlow
    • color: color and maximum alpha for the glow on the line.
    • glowPower: strength of the glow, as a percentage of the total line width (less than 1.0).
  • PolylineOutline
    • color: diffuse color and alpha for the interior of the line.
    • outlineColor: diffuse color and alpha for the outline.
    • outlineWidth: width of the outline in pixels.
Name Type Description
options Object optional Object with the following properties:
Name Type Default Description
strict Boolean false optional Throws errors for issues that would normally be ignored, including unused uniforms or materials.
translucent Boolean | function true optional When true or a function that returns true, the geometry with this material is expected to appear translucent.
fabric Object The fabric JSON used to generate the material.
diffuse Color 漫反射
specular Color 高光
ambient Color 环境光
shiness Number 光泽度
Throws:
  • DeveloperError : fabric: uniform has invalid type.
  • DeveloperError : fabric: uniforms and materials cannot share the same property.
  • DeveloperError : fabric: cannot have source and components in the same section.
  • DeveloperError : fabric: property name is not valid. It should be 'type', 'materials', 'uniforms', 'components', or 'source'.
  • DeveloperError : fabric: property name is not valid. It should be 'diffuse', 'specular', 'shininess', 'normal', 'emission', or 'alpha'.
  • DeveloperError : strict: shader source does not use string.
  • DeveloperError : strict: shader source does not use uniform.
  • DeveloperError : strict: shader source does not use material.
Example:
// Create a color material with fromType:
polygon.material = Cesium.Material.fromType('Color');
polygon.material.uniforms.color = new Cesium.Color(1.0, 1.0, 0.0, 1.0);

// Create the default material:
polygon.material = new Cesium.Material();

// Create a color material with full Fabric notation:
polygon.material = new Cesium.Material({
    fabric : {
        type : 'Color',
        uniforms : {
            color : new Cesium.Color(1.0, 1.0, 0.0, 1.0)
        }
    }
});
Demo:
See:

Members

staticreadonlyCesium.Material.AlphaMapType : String

Gets the name of the alpha map material.

staticreadonlyCesium.Material.BumpMapType : String

Gets the name of the bump map material.

staticreadonlyCesium.Material.CheckerboardType : String

Gets the name of the checkerboard material.

staticreadonlyCesium.Material.ColorType : String

Gets the name of the color material.

staticCesium.Material.DefaultCubeMapId : String

Gets or sets the default cube map texture uniform value.

staticCesium.Material.DefaultImageId : String

Gets or sets the default texture uniform value.

staticreadonlyCesium.Material.DiffuseMapType : String

Gets the name of the diffuce map material.

staticreadonlyCesium.Material.DotType : String

Gets the name of the dot material.

staticreadonlyCesium.Material.EmissionColorType : String

Gets the name of the checkerboard material.

staticreadonlyCesium.Material.EmissionMapType : String

Gets the name of the emmision map material.

staticreadonlyCesium.Material.FadeType : String

Gets the name of the fade material.

staticreadonlyCesium.Material.GridType : String

Gets the name of the grid material.

staticreadonlyCesium.Material.ImageType : String

Gets the name of the image material.

staticreadonlyCesium.Material.NormalMapType : String

Gets the name of the normal map material.

staticreadonlyCesium.Material.PolylineArrowType : String

Gets the name of the polyline arrow material.

staticreadonlyCesium.Material.PolylineDashType : String

Gets the name of the polyline glow material.

staticreadonlyCesium.Material.PolylineGlowType : String

Gets the name of the polyline glow material.

staticreadonlyCesium.Material.PolylineOutlineType : String

Gets the name of the polyline outline material.

staticreadonlyCesium.Material.RimLightingType : String

Gets the name of the rim lighting material.

staticreadonlyCesium.Material.SpecularMapType : String

Gets the name of the specular map material.

staticreadonlyCesium.Material.StripeType : String

Gets the name of the stripe material.

staticreadonlyCesium.Material.WaterType : String

Gets the name of the water material.

materials : Object

Maps sub-material names to Material objects.
Default Value: undefined

shaderSource : String

The glsl shader source for this material.
Default Value: undefined

translucent : Boolean|function

When true or a function that returns true, the geometry is expected to appear translucent.
Default Value: undefined

type : String

The material type. Can be an existing type or a new type. If no type is specified in fabric, type is a GUID.
Default Value: undefined

uniforms : Object

Maps uniform names to their values.
Default Value: undefined

Methods

staticCesium.Material.fromType(type, uniforms) → Material

Creates a new material using an existing material type.

Shorthand for: new Material({fabric : {type : type}});
Name Type Description
type String The base material type.
uniforms Object optional Overrides for the default uniforms.
Returns:
New material object.
Throws:
Example:
var material = Cesium.Material.fromType('Color', {
    color : new Cesium.Color(1.0, 0.0, 0.0, 1.0)
});

destroy() → undefined

Destroys the WebGL resources held by this object. Destroying an object allows for deterministic release of WebGL resources, instead of relying on the garbage collector to destroy this object.

Once an object is destroyed, it should not be used; calling any function other than isDestroyed will result in a DeveloperError exception. Therefore, assign the return value (undefined) to the object as done in the example.
Returns:
Throws:
  • DeveloperError : This object was destroyed, i.e., destroy() was called.
Example:
material = material && material.destroy();
See:

isDestroyed() → Boolean

Returns true if this object was destroyed; otherwise, false.

If this object was destroyed, it should not be used; calling any function other than isDestroyed will result in a DeveloperError exception.
Returns:
True if this object was destroyed; otherwise, false.
See:

isTranslucent()

Gets whether or not this material is translucent.
Returns:
true if this material is translucent, false otherwise.