Aquileo | SVG <feSpotLight> Element

SVG stands for Scalable Vector Graphic. It can be used to make graphics and animations like in HTML canvas. The <feSpotLight> SVG defines a light source which results in a spotlight effect. It defines a spotlight whose light is directed at a specific point and it only lights a limited area.

Syntax:

<feSpotLight x="" y="" z="" pointsAtX="" pointsAtY="" 
    pointsAtZ="" specularExponent="" limitingConeAngle="" />

Attributes:

x, y, z:It tells the corresponding x, y, z in co-ordinate system.
pointsAtX, pointsAtY, pointsAtZ: X, Y, Z location of the point where the light is shining on.
specularExponent: It tells the focus of light on a single point. Default value is 1.
limitingConeAngle: It tells the angle in degrees between two lines i.e. spot light axis and spot light cone.

Example 1:

html

<!DOCTYPE html>
<html>

<body>
    <svg width="200" height="200">
        <defs>
            <filter id="spotlight">
                <feSpecularLighting result="spec3" 
                    in="blur3" specularConstant="1.2" 
                    specularExponent="7"
                    lighting-color="#FFF">

                    <feSpotLight x="400" y="400" 
                        z="900" limitingConeAngle="9" />
                </feSpecularLighting>

                <feComposite in="SourceGraphic" 
                    in2="spotlight" operator="out" 
                    k1="0" k2="1" k3="1" k4="0" />
            </filter>
        </defs>

        <rect x="40" y="40" width="100" height="100" 
            style="stroke: #000000;
                fill: lightgreen;
                filter: url(#spotlight);" />

        <rect x="40" y="40" width="100" height="100" 
            style="stroke: #000000; 
                fill: green; 
                filter: url(#spotlight);" />

        <g fill="#FFFFFF" stroke="black" font-size="10" 
            font-family="Verdana">
            
            <text x="50" y="90">GeeksForGeeks</text>
    </svg>
</body>

</html>

Output:

Example 2:

html

<!DOCTYPE html>
<html>

<body>
    <svg width="200" height="200">
        <defs>
            <filter id="FillPaint">
                <feSpecularLighting result="spec3" 
                    in="blur3" specularConstant="1.2" 
                    specularExponent="7"
                    lighting-color="#FFF">

                    <feSpotLight x="600" y="600" 
                        z="1200" pointAtX="400" 
                        pointAtY="400" pointAtZ="400"
                        limitingConeAngle="9" />
                </feSpecularLighting>

                <feComposite in="SourceGraphic" 
                    in2="spotlight" operator="out" 
                    k1="0" k2="1" k3="1" k4="0" />
            </filter>
        </defs>

        <rect x="1" y="1" width="198" 
            height="118" style="stroke: #000000; 
                                fill: black;
                        filter: url(#FillPaint);" />

        <circle cx="100" cy="60" r="55" 
            stroke="darkgreen" stroke-width="3" 
            fill="Lightgreen"
            style="stroke: filter: url(#FillPaint);" />

        <g fill="#FFFFFF" stroke="Green" 
            font-size="10" c font-family="Verdana">
            <text x="60" y="62">GeeksForGeeks</text>
    </svg>
</body>

</html>

Output:

SVG <feSpotLight> Element

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