D3.js 链式过渡,用于不同形状的复合动画 [英] D3.js chain transitions for compound animations for different shapes
问题描述
我正在使用 D3 来制作复合动画.我有以下最终状态:
I'm toying with D3 to make a compound animation. I have the following final state:
基本上我想动画连接点 - 添加第一个圆圈.然后将线绘制到第二个圆上.画线后,添加第二个圆.
Essentially I want to animation connecting the dots - add the first circle. Then draw the line to the second circle. Once the line is drawn, the second circle is added.
为了增加一些视觉吸引力,我执行了其他过渡,例如在绘制线条时更改第一个和第二个圆的圆半径.
To add some visual appeal, I perform other transitions, such as changing circle radius for the first and second circle as the line is draw.
我可以添加圆圈并单独绘制线条,包括动画.但是,我不确定如何继续将过渡链接在一起以形成复合动画.
I can add the circles and draw the line individually, including animations. However, I'm not sure how to proceed with chaining the transitions together to form the compound animation.
我阅读了关于过渡/动画的内容,建议使用each("end")
.虽然这可以用于绘制初始对象,但 end 直到其他转换之后才会触发.
I've read about transitions/animations, which suggests using each("end")
. While this would work to draw the initial objects, end doesn't fire until after the other transitions.
- 使用
each("end", ...)
是否是链接转换的正确方法? - 如何开始另一个动画(即开始画线),同时仍然允许另一个过渡完成(即第一个圆半径突发).
- Is using
each("end", ...)
the correct approach for chaining transitions? - How do I start another animation (i.e. start draw the line) while still allowing another transition to complete (i.e. the first circle radius burst).
推荐答案
从 d3.v3 开始,过渡更容易链接,无需使用end".请参阅此处的注释.
The transition are easier to chain since d3.v3 without using "end". See the notes here.
例如,看看这个:
rect.transition()
.duration(500)
.delay(function(d, i) { return i * 10; })
.attr("x", function(d, i, j) { return x(d.x) + x.rangeBand() / n * j; })
.attr("width", x.rangeBand() / n)
.transition()
.attr("y", function(d) { return y(d.y); })
.attr("height", function(d) { return height - y(d.y); });
这是针对同一元素的过渡.对于不同的元素,请查看这个.
That's for transitions on the same element. For different elements, look at this one.
// First transition the line & label to the new city.
var t0 = svg.transition().duration(750);
t0.selectAll(".line").attr("d", line);
t0.selectAll(".label").attr("transform", transform).text(city);
// Then transition the y-axis.
y.domain(d3.extent(data, function(d) { return d[city]; }));
var t1 = t0.transition();
t1.selectAll(".line").attr("d", line);
t1.selectAll(".label").attr("transform", transform);
t1.selectAll(".y.axis").call(yAxis);
过渡附加到 svg 元素并从那里链接.
The transition is attached to the svg element and chained from there.
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