specularExponent - SVG: Scalable Vector Graphics 编辑

The specularExponent attribute controls the focus for the light source. The bigger the value the brighter the light.

Two elements are using this attribute: <feSpecularLighting> and <feSpotLight>

html, body, svg {
  height: 100%;
}

<svg viewBox="0 0 420 200" xmlns="http://www.w3.org/2000/svg">
  <filter id="diffuseLighting1" x="0" y="0" width="100%" height="100%">
    <feSpecularLighting in="SourceGraphic" specularExponent="1">
      <fePointLight x="60" y="60" z="20" />
    </feSpecularLighting>
  </filter>
  <filter id="diffuseLighting2" x="0" y="0" width="100%" height="100%">
    <feSpecularLighting in="SourceGraphic" specularExponent="5">
      <fePointLight x="60" y="60" z="20" />
    </feSpecularLighting>
  </filter>

  <rect x="0" y="0" width="200" height="200" style="filter: url(#diffuseLighting1);" />
  <rect x="0" y="0" width="200" height="200"
      style="filter: url(#diffuseLighting2); transform: translateX(220px);" />
</svg>

feSpecularLighting

For <feSpecularLighting>, specularExponent defines the exponent value for the specular term.

feSpotLight

For <feSpotLight>, specularExponent defines the exponent value controlling the focus for the light source.

Specifications

See also

• Description of Phong reflection model on Wikipedia