58 lines
1.1 KiB
JavaScript
58 lines
1.1 KiB
JavaScript
function zigzag_amplitude(d) {
|
|
return d.amplitude;
|
|
}
|
|
|
|
function zigzag_len(d) {
|
|
return d.len;
|
|
}
|
|
|
|
function zigzag_angularFrequency(d) {
|
|
return d.angularFrequency;
|
|
}
|
|
|
|
d3.svg.zigzag = function() {
|
|
var amplitude = zigzag_amplitude,
|
|
len = zigzag_len,
|
|
angularFrequency = zigzag_angularFrequency;
|
|
|
|
function zigzag() {
|
|
var A = amplitude.apply(this, arguments),
|
|
l = len.apply(this, arguments),
|
|
ω = angularFrequency.apply(this, arguments) + 1;
|
|
|
|
start = -l/2;
|
|
end = l/2;
|
|
|
|
step = l/ω;
|
|
|
|
var s = "M" + start + ",0";
|
|
|
|
for (var i = 1; i<ω; i++)
|
|
s += "L" + (start + i*step) + "," + ((i%2)?A:-A);
|
|
|
|
s += "L" + end + ",0";
|
|
|
|
return s;
|
|
}
|
|
|
|
zigzag.amplitude = function(v) {
|
|
if (!arguments.length) return amplitude;
|
|
amplitude = d3.functor(v);
|
|
return zigzag;
|
|
};
|
|
|
|
zigzag.len = function(v) {
|
|
if (!arguments.length) return len;
|
|
len = d3.functor(v);
|
|
return zigzag;
|
|
};
|
|
|
|
zigzag.angularFrequency = function(v) {
|
|
if (!arguments.length) return angularFrequency;
|
|
angularFrequency = d3.functor(v);
|
|
return zigzag;
|
|
};
|
|
|
|
return zigzag;
|
|
};
|