Hierarchical

This example shows how to use the hierarchical layout algorithm. The hierarchical layout is a layout algorithm that places the nodes in a hierarchy. It is useful for visualizing trees and DAGs.

index.tsindex.htmlstyles.css

import Ogma from '@linkurious/ogma';

const ogma = new Ogma({
  container: 'graph-container'
});

const graph = await ogma.generate.balancedTree({
  children: 2,
  height: 5
});
graph.nodes.forEach(node => {
  node.attributes!.x = 0;
  node.attributes!.y = 0;
});
await ogma.setGraph(graph);

// Run layout
await ogma.layouts.hierarchical({
  direction: 'TB', // Direction of the layout. Can be TB, BT, LR, or RL,
  // where T = top, B = bottom, L = left, and R = right.
  duration: 300, // Duration of the animation
  nodeDistance: 60, // Number of pixels that separate nodes horizontally in the layout.
  levelDistance: 50, // Number of pixels between each layer in the layout.
  locate: {
    easing: 'linear',
    duration: 300
  }
});

html

<!doctype html>
<html>
  <head>
    <meta charset="utf-8" />

    <link type="text/css" rel="stylesheet" href="styles.css" />
  </head>
  <body>
    <div id="graph-container"></div>
    <script type="module" src="index.ts"></script>
  </body>
</html>

css

#graph-container {
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  position: absolute;
  margin: 0;
  overflow: hidden;
}

Hierarchical ​

Hierarchical