There’s a bounding box example in my talk on force layouts. The position Verlet integration allows you to define geometric constraints (such as bounding boxes and collision detection) inside the “tick” event listener; simply move the nodes to comply with the constraint and the simulation will adapt accordingly. That said, gravity is definitely a more … Read more
Right now, you are appending the text elements to the circle elements, and that simply won’t work. When you write… var label = nodes.append(“svg:text”) You’re appending the texts to the nodesselection. However, you have to keep in mind what nodes is: var nodes = svg.selectAll(“circle”) .data(dataset.nodes) .enter() .append(“circle”) Thus, you are appending the texts to … Read more
All the answers above misunderstood Øystein Amundsen’s question. The only way to stabilize the force upon it starts is to set node.x and node.y a proper value. Please note that the node is the data of d3.js, not the represented DOM type. For example, if you load nodes = [{“id”: a}, {“id”: b}, {“id”: c}] … Read more
If you peruse the release notes, you’ll see a full explanation of everything that’s changed between the final release of 2.x (2.10.3) and the most recent release, 3.2.7. In particular, from release 3.2.2: Better handling of drag gestures in d3.behavior.drag, d3.behavior.zoom and d3.svg.brush by not preventing default behaviors or stopping propagation. For example, mousedown now … Read more
I tried to find a good tutorial to link to, but couldn’t find anything that really covered all the issues, so I’m going to write it out step-by-step myself. First, you need to clearly understand what you’re trying to accomplish. This is different for the two types of zooming. I don’t really like the terminology … Read more
In my opinion, the force layout is unsuitable for the purpose of placing labels on a map. The reason is simple — labels should be as close as possible to the places they label, but the force layout has nothing to enforce this. Indeed, as far as the simulation is concerned, there is no harm … Read more
Set d.fixed on the desired nodes to true, and initialize d.x and d.y to the desired position. These nodes will then still be part of the simulation, and you can use the normal display code (e.g., setting a transform attribute); however, because they are marked as fixed, they can only be moved by dragging and … Read more
The error is because you are selecting the data objects (d.source and d.target) rather than the DOM elements associated with those data objects. You’ve got the line highlighting working, but I would probably combine your code into a single iteration, like this: link.style(“opacity”, function(o) { return o.source === d || o.target === d ? 1 … Read more