diffuseConstant

The diffuseConstant attribute represents the kd value in the Phong lighting model. In SVG, this can be any non-negative number.

It’s used to determine the final RGB value of a given pixel. The brighter the lighting-color, the smaller this number should be.

Only one element is using this attribute: <feDiffuseLighting>

<svg viewBox="0 0 420 200" xmlns="http://www.w3.org/2000/svg">
  <filter id="diffuseLighting1" x="0" y="0" width="100%" height="100%">
    <feDiffuseLighting in="SourceGraphic" diffuseConstant="1">
      <fePointLight x="60" y="60" z="20" />
    </feDiffuseLighting>
  </filter>
  <filter id="diffuseLighting2" x="0" y="0" width="100%" height="100%">
    <feDiffuseLighting in="SourceGraphic" diffuseConstant="2">
      <fePointLight x="60" y="60" z="20" />
    </feDiffuseLighting>
  </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>

Usage notes

Value <number>
Default value 1
Animatable Yes

Specifications

Specification Status Comment
Filter Effects Module Level 1
The definition of 'diffuseConstant' in that specification.
Working Draft No change
Scalable Vector Graphics (SVG) 1.1 (Second Edition)
The definition of 'diffuseConstant' in that specification.
Recommendation Initial definition

Browser compatibility

Update compatibility data on GitHub
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ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
diffuseConstantChrome ? Edge ? Firefox ? IE ? Opera ? Safari ? WebView Android ? Chrome Android ? Firefox Android ? Opera Android ? Safari iOS ? Samsung Internet Android ?

Legend

Compatibility unknown  
Compatibility unknown

See also

Document Tags and Contributors

Contributors to this page: Sebastianz, mdnwebdocs-bot, Jeremie
Last updated by: Sebastianz,