我有2点之间的bezier曲线.我想将所有曲线切成两个相等的一半.我的一个想法是,如果我可以控制't'值我将通过t = [0,0.5]和t = [0.5,1]绘制2条曲线,但我不知道如何.以下是我的代码.我不介意任何其他想法或建议
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>D3 test</title>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>
var Over = function(){
d3.select(this)
.style("stroke-opacity", 0.25);
}
var Out = function(){
d3.select(this)
.transition().duration(200)
.style("stroke-opacity", 0);
}
function curve(n,x1,y1,x2,y2){
var xr = (x1+x2)/2,
yr = (y1+y2)/2,
euDist = Math.sqrt(Math.pow(x2-x1,2)+Math.pow(y2-y1,2)),
x3 = -y1+xr+yr, x4 = -y2+xr+yr,
y3 = x1+yr-xr, y4 = x2+yr-xr,
ctrl , curveDescription;
svg.append('path')
.attr("stroke", 'blue')
.attr('fill','none')
.style("stroke-opacity",0.25)
.attr('d', 'M'+x3+','+y3+'L'+x4+','+y4)
.attr('stroke-width',strokeWidth);
for(var j=0;j<=n;j++){ …