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SVG numOctaves Attribute

Last Updated : 31 Mar, 2022
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The numOctaves attribute defines the number of octaves for the noise function of the <feTurbulence> primitive. Only <feTurbulence> element is using this attribute.

Syntax:

numOctaves = "integer"

Attribute Values: The numOctaves attribute accepts the values mentioned above and described below

  • integer: This value shows the number of octaves.

Example 1: Below example illustrate the use of the numOctaves attribute.

HTML




<!DOCTYPE html>
<html>
  
<body>
    <h1 style="color: green;">
        GeeksforGeeks
    </h1>
  
    <svg width="200" height="200" 
        viewBox="0 0 220 220" 
        xmlns="http://www.w3.org/2000/svg">
          
        <filter id="geek1">
            <feTurbulence baseFrequency="0.05" 
                numOctaves="1" result="turbulence" />
            <feDisplacementMap in2="turbulence" 
                in="SourceGraphic" scale="50" 
                xChannelSelector="R"
                yChannelSelector="G" />
        </filter>
  
        <circle cx="100" cy="100" r="100" 
            fill="green" style="filter: url(#geek1)" />
    </svg>
</body>
  
</html>


Output:

Example 2:

HTML




<!DOCTYPE html>
<html>
  
<body>
    <div style="color: green; 
            margin-left: 50px;">
        <h1>GeeksforGeeks</h1>
  
        <svg viewBox="0 0 480 100" 
            xmlns="http://www.w3.org/2000/svg">
  
            <filter id="geek2" x="-20%" 
                y="-20%" width="150%" 
                height="150%">
  
                <feTurbulence type="turbulence" 
                    baseFrequency="0.05" 
                    numOctaves="5" 
                    result="turbulence" />
  
                <feDisplacementMap in2="turbulence" 
                    in="SourceGraphic" scale="20" />
            </filter>
  
            <polygon points=
                "50, 9 60.5, 39.5 92.7, 40.1 67,
                59.5 76.4, 90.3 50, 71.9 23.6,
                90.3 32.9, 59.5 7.2, 40.1 39.4, 39.5" 
                style="filter: url(#geek2);"
                fill="hsl(106, 80%, 50%)" />
        </svg>
    </div>
</body>
  
</html>


Output:



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