我需要知道是否可以将 svg 路径转换为 svg 折线。
我找到了将路径转换为多边形的 javascript 代码:
function pathToPolygon(path,samples){
if (!samples) samples = 0;
var doc = path.ownerDocument;
var poly = doc.createElementNS('http://www.w3.org/2000/svg','polygon');
// Put all path segments in a queue
for (var segs=[],s=path.pathSegList,i=s.numberOfItems-1;i>=0;--i) segs[i] = s.getItem(i);
var segments = segs.concat();
var seg,lastSeg,points=[],x,y;
var addSegmentPoint = function(s){
if (s.pathSegType == SVGPathSeg.PATHSEG_CLOSEPATH){
}else{
if (s.pathSegType%2==1 && s.pathSegType>1){
// All odd-numbered path types are relative, except PATHSEG_CLOSEPATH (1)
x+=s.x; y+=s.y;
}else{
x=s.x; y=s.y;
}
var lastPoint = points[points.length-1];
if (!lastPoint || x!=lastPoint[0] || y!=lastPoint[1]) points.push([x,y]);
}
};
for (var d=0,len=path.getTotalLength(),step=len/samples;d<=len;d+=step){
var seg = segments[path.getPathSegAtLength(d)];
var pt = path.getPointAtLength(d);
if (seg != lastSeg){
lastSeg = seg;
while (segs.length && segs[0]!=seg) addSegmentPoint( segs.shift() );
}
var lastPoint = points[points.length-1];
if (!lastPoint || pt.x!=lastPoint[0] || pt.y!=lastPoint[1]) points.push([pt.x,pt.y]);
}
for (var i=0,len=segs.length;i<len;++i) addSegmentPoint(segs[i]);
for (var i=0,len=points.length;i<len;++i) points[i] = points[i].join(',');
poly.setAttribute('points',points.join(' '));
return poly;
}
我是 js 的初学者,不明白这一行:var seg,lastSeg,points=[],x,y;
它工作得很好,但它在路径线周围画了一个框架。但我不想要一个框架,我想将路径转换为点集,折线。可以吗 谢谢