Elliptical Arcs with SVG

Elliptical Arcs with SVG

An elliptical arc draws an arc from the current point to a specified point. The ARC command begins with the x and y radius and ends with the ending point of the arc. Between these is three other values:x axis rotation, large arc flag and sweep flag. The x axis rotation is used to rotate the ellipse, the arc is created from. This rotation maintains the start and end points, whereas a rotation with the transform attribute (outside the path DESCRI ption) would cause the entire path, including the start and end points, to be rotated. The large ARC flag and sweep flag control which part of the ellipse are used to cut the arc. These is needed because there ' s more than one-to-place a ellipse so that it includes the start and end points.

Varying x-axis-rotation Example

The leftmost arc has a 0 degrees x-axis rotation, the top-middle arc has a degrees, the bottom-middle has a degrees and th E rightmost has 135 degrees. Notice in the source is the first move command and the angle change since I ' ve used relative coordinates.

<?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" >
<SvgViewBox = "0 0 1100 400 "Version = "1.1 ">
<GStroke = "BlackStroke-width = "3 "fill = "none";
         <path d = "M (a) 100 50 0 1 1 250 "/>
        <path  d = "m 1 1"/>
    &nb Sp;   <path d = "M 1 1 "/>
        <path& nbsp d = "m 1 1" 135;
/> T;/G>
</SVG>
Varying Large ARC and Sweep Flags Example

This example was similar to the one in the specification.

<?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" >
<SvgViewBox = "0 0 1100 400 "Version = "1.1 ">
<GStroke = "NavyStroke-width = "3 "Fill = "None ">
<PathD = "M 0 0 0 "/>
<PathD = "M-A 0 0 1 "/>
<PathD = "M 0 1 0 "/>
<PathD = "M-A 0 1 1 "/>
</G>
<GText-anchor = "Middle "Font-size = "25 "Font = "Sans-serif ">
<Textx = "400 "y = "">
Large-arc-flag=0
</Text>
<Textx = "825 "y = "">
Large-arc-flag=1
</Text>
</G>
<GText-anchor = "EndFont-size = "25 "Font = "Sans-serif "Rotate = "0 ">
<text x = "230"   y = "70";
             sweep-flag=0
         </TEXT>
        < text x = "230"   y = "220";
             sweep-flag=1
         </TEXT>
    </G>
</< Span class= "Sc-elt" >SVG> Reference: http://www.svgbasics.com/arcs.html

Elliptical Arcs with SVG