SVG Gradients - Radial
An SVG Gradient must be defined within a <defs> tag.
Radial Gradients
The <radialGradient> tag is used to define an SVG radial gradient.
The <radialGradient> tag must be nested within a <defs> tag. The <defs> tag is short
for definitions and it allows definition of special
elements such as gradients.
Copy the following code into Notepad and save
the file as "radial1.svg". Place the file in your Web directory:
<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg width="100%" height="100%" version="1.1"
xmlns="http://www.w3.org/2000/svg">
<defs>
<radialGradient id="grey_blue" cx="50%" cy="50%" r="50%"
fx="50%" fy="50%">
<stop offset="0%" style="stop-color:rgb(200,200,200);
stop-opacity:0"/>
<stop offset="100%" style="stop-color:rgb(0,0,255);
stop-opacity:1"/>
</radialGradient>
</defs>
<ellipse cx="230" cy="200" rx="110" ry="100"
style="fill:url(#grey_blue)"/>
</svg>
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Code explanation:
- The id attribute of the <radialGradient> tag defines a unique name for the gradient
- The fill:url(#grey_blue) property links the ellipse element to the gradient
- The cx, cy and r attributes define the outermost
circle and the fx and fy define the innermost circle
- The color range for a gradient can be composed of two or more colors. Each color
is specified with a <stop>
tag. The offset attribute is used to define where the gradient color begin and
end
View example
Another example:
<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg width="100%" height="100%" version="1.1"
xmlns="http://www.w3.org/2000/svg">
<defs>
<radialGradient id="grey_blue" cx="20%" cy="40%" r="50%"
fx="50%" fy="50%">
<stop offset="0%" style="stop-color:rgb(200,200,200);
stop-opacity:0"/>
<stop offset="100%" style="stop-color:rgb(0,0,255);
stop-opacity:1"/>
</radialGradient>
</defs>
<ellipse cx="230" cy="200" rx="110" ry="100"
style="fill:url(#grey_blue)"/>
</svg>
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View example
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