CODEWITHSUNDEEP
three.jswebgl-globe
Karpo
Karpo

Reputation: 23

Selecting bars in the WebGL Globe (Google)

We all know http://www.chromeexperiments.com/globe/ WebGL experiments and I really got interested in what they did there.

What they do there is they build bars on a globe based on GPS (JSON format) information. Pretty cool in itself.

While waiting on three.js library documentation getting more complete I'd like to ask a question. How would I implement a method that would investigate which bar was ie. clicked?

Thanks in advance, Karpo

Upvotes: 2

Views: 823

Answers (2)

Torsten Becker
Torsten Becker

Reputation: 4323

Depending on the amount of bars I'd use the ray on the globe and select the bar via latitude and longitude, which is much faster. Also it does not rely on user's capabilities to click tiny bars.

Upvotes: 1

EliSherer
EliSherer

Reputation: 1647

  1. You would need to put the bars in a group if they aren't already.. (the meshes)

  2. You would need to use Projector and Ray to determin the clicked object:

    http://mrdoob.github.com/three.js/examples/webgl_interactive_cubes.html

And from here on it would be pretty easy.. you would need a way to distinguish between the bars somehow...maybe with the mesh's 'name' attribute..

Upvotes: 3

Related Questions