Hi I would like to use Fisheye Distortion plugin for my force-directed graph in d3.js, but when I want to apply this plugin, behaviour of graph is weird. I am new in d3.js and not good at computer graphics.
complete sample in jsfiddle
var fisheye = d3.fisheye.circular().radius(200)
.distortion(2);
// graph - variable which represents whole graph
graph.svg.on("mousemove", function() {
fisheye.focus(d3.mouse(this));
d3.select("svg").selectAll("circle").each(function(d) { d.fisheye = fisheye(d); })
.attr("cx", function(d) { return d.fisheye.x; })
.attr("cy", function(d) { return d.fisheye.y; })
.attr("r", function(d) { return d.fisheye.z * 4.5; });
d3.select("svg").selectAll("line").attr("x1", function(d) { return d.source.fisheye.x; })
.attr("y1", function(d) { return d.source.fisheye.y; })
.attr("x2", function(d) { return d.target.fisheye.x; })
.attr("y2", function(d) { return d.target.fisheye.y; });
});
Weird behaviour I mean the nodes of graph disappear (are hidden) after mouseover action.
The problem is that you were using the code to add cx
and cy
to circles, but your circles were actually enclosed inside nodeElements
which were transform
ed into place.
Hence, changing the fisheye code to the following solves the problem:
graph.svg.on("mousemove", function() {
fisheye.focus(d3.mouse(this));
// Change transform on the .node
d3.select("svg").selectAll(".node")
.each(function(d) { d.fisheye = fisheye({ x: graph.x(d.x), y: graph.y(d.y) }); console.log(d.fisheye, d); })
.attr("transform", function (d) { return "translate(" + d.fisheye.x + "," + d.fisheye.y + ")"; })
// Now change the 'r'adius on the circles within
// One can also scale the font of the text inside nodeElements here
.select("circle")
.attr("r", function(d) { return 15 * graph.nodeSizeFactor * d.fisheye.z; });
d3.select("svg").selectAll("line")
.attr("x1", function(d) { return d.source.fisheye.x; })
.attr("y1", function(d) { return d.source.fisheye.y; })
.attr("x2", function(d) { return d.target.fisheye.x; })
.attr("y2", function(d) { return d.target.fisheye.y; });
});
Note that I have also applied the proper scales graph.x
and graph.y
for the transform
attribute and 15 * graph.nodeSizeFactor
for the radius of the circles (instead of 4.5
).
Working Demo: http://jsfiddle.net/90u4sjzm/23/