fancy zigzag lines

This commit is contained in:
Nils Schneider 2012-06-05 16:29:50 +02:00
parent 1c4a34d5c4
commit 0d47d4c9f9

View file

@ -1,3 +1,62 @@
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;
};
function getOffset( el ) {
var _x = 0;
var _y = 0;
@ -129,14 +188,27 @@ function render_graph(type) {
.attr("class", "link")
.style("stroke-width", function(d) { return Math.min(1, d.strength * 2); });
var linklabel = vis.selectAll("text")
.data(linkdata.filter(function (d) {return d.quality != "TT"}))
var linklabel = vis.selectAll("g")
.data(linkdata.filter(function (d) {return d.quality != "TT" && d.quality != "1.000"}))
.enter()
.append("text")
.attr("text-anchor", "middle")
.attr("color", "#000")
.attr("class", "strength")
.text(function (d) { return d.quality; });
.append("g")
.append("path")
.attr("d", d3.svg.zigzag().amplitude(function (d) {
return Math.pow((1 - 1/d.quality), 0.5) * 8;
}).len(30).angularFrequency(4)
/*
d3.svg.arc().outerRadius(5).innerRadius(0)
.startAngle( function (d) {
return Math.PI/d.quality - Math.PI/2;
})
.endAngle( function (d) {
return -Math.PI/d.quality - Math.PI/2;
})
*/
)
.attr("fill", "transparent")
.attr("stroke", "#C83771")
.attr("stroke-width", "1px")
    function isConnected(a, b) {
        return linkedByIndex[a.index + "," + b.index] || linkedByIndex[b.index + "," + a.index] || a.index == b.index;
@ -161,6 +233,9 @@ function render_graph(type) {
            link.style("stroke-opacity", function(o) {
                return o.source === d || o.target === d ? 1 : opacity;
            });
            linklabel.style("opacity", function(o) {
                return o.source === d || o.target === d ? 1 : opacity;
            });
        };
    }
@ -219,10 +294,6 @@ function render_graph(type) {
.append("g");
uplink_info.append("path")
.attr("width", 16)
.attr("height", 16)
.attr("x", 0)
.attr("y", 0)
.attr("d","m -2.8850049,-13.182327 c 7.5369165,0.200772 12.1529864,-1.294922 12.3338513,-10.639456 l 2.2140476,1.018191 -3.3137621,-5.293097 -3.2945999,5.20893 2.4339957,-0.995747 c -0.4041883,5.76426 -1.1549641,10.561363 -10.3735326,10.701179 z")
.style("fill", "#333");
@ -239,9 +310,19 @@ function render_graph(type) {
.attr("y2", function(d) { return d.target.y; });
linklabel
.attr("x", function(d) { return Math.min(d.source.x, d.target.x) + Math.abs(d.source.x - d.target.x) / 2; })
.attr("y", function(d) { return Math.min(d.source.y, d.target.y) + Math.abs(d.source.y - d.target.y) / 2; });
.attr("transform", function(d) {
π = Math.PI;
Δx = d.source.x - d.target.x;
Δy = d.source.y - d.target.y;
m = Δy/Δx;
α = Math.atan(m);
α += Δx<0?π:0;
sin = Math.sin(α);
cos = Math.cos(α);
x = (Math.min(d.source.x, d.target.x) + Math.abs(Δx) / 2)
y = (Math.min(d.source.y, d.target.y) + Math.abs(Δy) / 2)
return "matrix(" + [cos, sin, -sin, cos, x, y].join(",") + ")";
});
node.attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; });
});