Hi Matthew,
I like your initiative to do something about the state of the
available web panorama viewers. If it weren't for those poor IE users,
it would be dead obvious, that WebGL is the way to go (and I have a
tendency trying to ignore those whenever I can ;)). I did some
experiments regarding WebGL and panorama viewing myself some time ago:
http://lizardq.com/posts/experimental-webgl-panorama-viewer/
Although, my focus was primarily on getting some HDR panorama viewing
feature onto our website.
You seemed to be interested in a low a footprint script. I have about
400 lines of js and another 120 GLSL code (but admittedly using jquery
for convenience). The geometrical approach I used is different: there
is no textured 3D structure approximating a sphere and then looking at
it from the inside. I render a simple viewport sized quad and use a
fragment shader to find the proper pixel position in the source
texture for each pixel in the viewport.
You or anyone who is interested should be able to get a look at the
(uncompressed) code if you know your browser web debugging facilities.
If you think replacing tree.js with some GLSL code might be
interesting, let me know.
- Axel
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