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    feDiffuseLighting

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    This filter primitive lights an image using the alpha channel as a bump map. The resulting image, which is an RGBA opaque image, depends on the light color, light position and surface geometry of the input bump map.

    The light map produced by this filter primitive can be combined with a texture image using the multiply term of the arithmetic operator of the <fecomposite> filter primitive. Multiple light sources can be simulated by adding several of these light maps together before applying it to the texture image.

    Usage context

    Categories Filter primitive element
    Permitted content Any number of descriptive elements and exactly one light source element, in any order.
    Normative document SVG 1.1 (2nd Edition)

    Example

    The following example show the effect of the feDiffuseLighting element on a circle with each light source available. Each time, the light comes from the upper left corner.

    <svg width="440" height="140" xmlns="http://www.w3.org/2000/svg">
    
      <!-- No light is applied -->
      <text text-anchor="middle" x="60" y="22">No Light</text>
      <circle cx="60" cy="80" r="50" fill="green" />
    
      <!-- the light source is a fePointLight element -->
      <text text-anchor="middle" x="170" y="22">fePointLight</text>
      <filter id="lightMe1">
        <feDiffuseLighting in="SourceGraphic" result="light" lighting-color="white">
          <fePointLight x="150" y="60" z="20" />
        </feDiffuseLighting>
    
        <feComposite in="SourceGraphic" in2="light"
                     operator="arithmetic" k1="1" k2="0" k3="0" k4="0"/>
      </filter>
    
      <circle cx="170" cy="80" r="50" fill="green" filter="url(#lightMe1)" />
    
      <!-- the light source is a feDistantLight element -->
      <text text-anchor="middle" x="280" y="22">feDistantLight</text>
      <filter id="lightMe2">
        <feDiffuseLighting in="SourceGraphic" result="light" lighting-color="white">
          <feDistantLight azimuth="240" elevation="20"/>
        </feDiffuseLighting>
    
        <feComposite in="SourceGraphic" in2="light"
                     operator="arithmetic" k1="1" k2="0" k3="0" k4="0"/>
      </filter>
    
      <circle cx="280" cy="80" r="50" fill="green" filter="url(#lightMe2)" />
    
      <!-- the light source is a feSpotLight source -->
      <text text-anchor="middle" x="390" y="22">feSpotLight</text>
      <filter id="lightMe3">
        <feDiffuseLighting in="SourceGraphic" result="light" lighting-color="white">
          <feSpotLight x="360" y="5" z="30" limitingConeAngle="20"
                       pointsAtX="390" pointsAtY="80" pointsAtZ="0"/>
        </feDiffuseLighting>
    
        <feComposite in="SourceGraphic" in2="light"
                     operator="arithmetic" k1="1" k2="0" k3="0" k4="0"/>
      </filter>
    
      <circle cx="390" cy="80" r="50" fill="green" filter="url(#lightMe3)" />
    </svg>

    Expected rendering:

    Expected rendering for the example

    Live rendering:

    Attributes

    Global attributes

    Specific attributes

    DOM Interface

    This element implements the SVGFEDiffuseLightingElement interface.

    See also

    ドキュメントのタグと貢献者

    Contributors to this page: kscarfone, Manuel_Strehl, Jeremie
    最終更新者: kscarfone,