如何应用D3条形图的模式？
我试图将一个模式应用于D3条形图，但是我得到的是这样的：
我正在使用如下定义的绿色和红色模式：
var defs = this.svg.append("g:defs");
defs.append("g:pattern")
.attr("id", "red-fill")
.attr("patternUnits", "userSpaceOnUse")
.attr("width", "85")
.attr("height", "10")
.append("g:image")
.attr("xlink:href", "../10px-barchart-red.png")
.attr("x", 0)
.attr("y", 0)
.attr("width", 85)
.attr("height", 10);
var defs = this.svg.append("g:defs");
defs.append("g:pattern")
.attr("id", "green-fill")
.attr("patternUnits", "userSpaceOnUse")
.attr("width", "85")
.attr("height", "10")
.append("g:image")
.attr("xlink:href", "../10px-barchart-green.png")
.attr("x", 0)
.attr("y", 0)
.attr("width", 85)
.attr("height", 10);
情节是由：
this.svg.selectAll("rect")
.data(dataset, getKeys)
.enter()
.append("rect")
.attr('class', 'bar')
.attr("x", function(d, i) {
return x(i) + 44;
})
.attr("y", function(d, i) {
return y(d.value);
})
.attr("width", x.rangeBand())
.attr("height", function(d, i) {
return height + padding - y(d.value);
})
.attr("fill", function(d) {
if (d.key == 0) {
return "url(#green-fill)";
} else {
return "url(#red-fill)";
}
})
John Schulz的这个模块成功地制作了看起来很棒的图案条形图（https://bl.ocks.org/jfsiii/7772281）。
为了方便和永久性复制下面的代码片段中的代码（还添加了一些动画以显示它也可以很好地转换）。
var first = true;
setInterval( function(){
if(first){
d3.select('.thing-2').transition()
.delay(500)
.duration(1000)
.attr('height',20)
.attr('y',80)
}else{
d3.select('.thing-2').transition()
.delay(500)
.duration(1000)
.attr('height',100)
.attr('y',0)
}
first = !first;
},2500)<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>
<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>SVG colored patterns via mask</title>
<style>
/* FF seems to need explicit dimensions */
svg {
width: 500px;
height: 500px;
}
rect.hbar {
mask: url(#mask-stripe)
}
.thing-1 {
fill: blue;
}
.thing-2 {
fill: green;
}
</style>
</head>
<body>
<svg>
<defs>
<pattern id="pattern-stripe"
width="4" height="4"
patternUnits="userSpaceOnUse"
patternTransform="rotate(45)">
<rect width="2" height="4" transform="translate(0,0)" fill="white"></rect>
</pattern>
<mask id="mask-stripe">
<rect x="0" y="0" width="100%" height="100%" fill="url(#pattern-stripe)" />
</mask>
</defs>
<!-- bar chart -->
<rect class="hbar thing-2" x="0" y="0" width="50" height="100"></rect>
<rect class="hbar thing-2" x="51" y="50" width="50" height="50"></rect>
<rect class="hbar thing-2" x="102" y="25" width="50" height="75"></rect>
<!-- horizontal bar chart -->
<rect class="hbar thing-1" x="0" y="200" width="10" height="50"></rect>
<rect class="hbar thing-1" x="0" y="251" width="123" height="50"></rect>
<rect class="hbar thing-1" x="0" y="302" width="41" height="50"></rect>
</svg>
</body>
</html>