我想为我使用d3和SVG绘制的阴影设置阴影,但我在叠加相邻元素的阴影时遇到了问题。看到下面的图片,了解它目前的样子。请注意,中间的六边形看起来有不同的高度,因为阴影正在其中一些上面呈现。我想要做的就是设置阴影,使它们只在背景上渲染,而不是在其他相邻的格子上。SVG阴影分层
这里是如何,目前正在定义阴影代码:
var filter = defs.append("filter")
.attr("id", "drop-shadow")
.attr("height", "130%");
// SourceAlpha refers to opacity of graphic that this filter will be applied to
// convolve that with a Gaussian with standard deviation 3 and store result
// in blur
filter.append("feGaussianBlur")
.attr("in", "SourceAlpha")
.attr("stdDeviation", 1)
.attr("result", "blur");
// translate output of Gaussian blur to the right and downwards with 2px
// store result in offsetBlur
filter.append("feOffset")
.attr("in", "blur")
.attr("dx", 1)
.attr("dy", 1)
.attr("result", "offsetBlur");
// overlay original SourceGraphic over translated blurred opacity by using
// feMerge filter. Order of specifying inputs is important!
var feMerge = filter.append("feMerge");
feMerge.append("feMergeNode")
.attr("in", "offsetBlur")
feMerge.append("feMergeNode")
.attr("in", "SourceGraphic");
的样式会应用到六边形:
d3.select(this).style("filter", "url(#drop-shadow)")