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81 lines
2.6 KiB
JavaScript
81 lines
2.6 KiB
JavaScript
d3.hive = {};
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d3.hive.link = function() {
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var source = function(d) { return d.source; },
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target = function(d) { return d.target; },
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angle = function(d) { return d.angle; },
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startRadius = function(d) { return d.radius; },
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endRadius = startRadius,
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arcOffset = -Math.PI / 2;
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function link(d, i) {
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var s = node(source, this, d, i),
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t = node(target, this, d, i),
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x;
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if (t.a < s.a) x = t, t = s, s = x;
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if (t.a - s.a > Math.PI) s.a += 2 * Math.PI;
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var a1 = s.a + (t.a - s.a) / 3,
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a2 = t.a - (t.a - s.a) / 3;
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return s.r0 - s.r1 || t.r0 - t.r1
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? "M" + Math.cos(s.a) * s.r0 + "," + Math.sin(s.a) * s.r0
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+ "L" + Math.cos(s.a) * s.r1 + "," + Math.sin(s.a) * s.r1
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+ "C" + Math.cos(a1) * s.r1 + "," + Math.sin(a1) * s.r1
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+ " " + Math.cos(a2) * t.r1 + "," + Math.sin(a2) * t.r1
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+ " " + Math.cos(t.a) * t.r1 + "," + Math.sin(t.a) * t.r1
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+ "L" + Math.cos(t.a) * t.r0 + "," + Math.sin(t.a) * t.r0
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+ "C" + Math.cos(a2) * t.r0 + "," + Math.sin(a2) * t.r0
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+ " " + Math.cos(a1) * s.r0 + "," + Math.sin(a1) * s.r0
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+ " " + Math.cos(s.a) * s.r0 + "," + Math.sin(s.a) * s.r0
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: "M" + Math.cos(s.a) * s.r0 + "," + Math.sin(s.a) * s.r0
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+ "C" + Math.cos(a1) * s.r1 + "," + Math.sin(a1) * s.r1
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+ " " + Math.cos(a2) * t.r1 + "," + Math.sin(a2) * t.r1
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+ " " + Math.cos(t.a) * t.r1 + "," + Math.sin(t.a) * t.r1;
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}
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function node(method, thiz, d, i) {
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var node = method.call(thiz, d, i),
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a = +(typeof angle === "function" ? angle.call(thiz, node, i) : angle) + arcOffset,
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r0 = +(typeof startRadius === "function" ? startRadius.call(thiz, node, i) : startRadius),
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r1 = (startRadius === endRadius ? r0 : +(typeof endRadius === "function" ? endRadius.call(thiz, node, i) : endRadius));
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return {r0: r0, r1: r1, a: a};
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}
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link.source = function(_) {
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if (!arguments.length) return source;
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source = _;
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return link;
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};
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link.target = function(_) {
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if (!arguments.length) return target;
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target = _;
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return link;
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};
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link.angle = function(_) {
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if (!arguments.length) return angle;
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angle = _;
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return link;
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};
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link.radius = function(_) {
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if (!arguments.length) return startRadius;
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startRadius = endRadius = _;
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return link;
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};
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link.startRadius = function(_) {
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if (!arguments.length) return startRadius;
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startRadius = _;
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return link;
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};
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link.endRadius = function(_) {
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if (!arguments.length) return endRadius;
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endRadius = _;
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return link;
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};
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return link;
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};
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