Public
Edited
Apr 7, 2019
2 forks
41 stars
axis = function(data, line, circles) {
let smallest
let top
// find the middle of the smallest section of the middle area
data.forEach(function(section){
if(!smallest || smallest > section.top - section.bottom) {
smallest = section.top - section.bottom
top = section.bottom + (smallest/2) - 1
}
})
// axis line transition
line
.attr('y1', height/2).attr('y2', height/2)
.attr('opacity', '0')
.transition()
.duration(500)
.ease(d3.easeCircle)
.attr('y1', y(top)).attr('y2', y(top))
.attr('opacity', '0.8')
// axis circle transition
circles
.attr("cy", y(top))
.attr('opacity', '0')
.transition()
.delay(500)
.duration(300)
.ease(d3.easeCircle)
.attr('opacity', '0.8')
}
area = function(type) {
return d3.area()
.curve(d3.curveMonotoneX)
.x(d => x(d.name))
// the bottom y possition of each area
.y0(
type==='no'?
height/2 :
// the inner stream should always be the smaller one.
d => y(
type==='under' || (type!=='over' && d.bottom > d.outerBottom) ?
d.bottom : d.outerBottom
)
)
// the top y position of tach area
.y1(
type==='no'?
height/2 :
// the inner stream should always be the smaller one.
d => y(
type==='under' || (type!=='over' && d.top < d.outerTop) ?
d.top : d.outerTop
)
)
}
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