Hello Julian, it seems that I don't understand what you want. Do you want to show the cave model under fixed viewpoint (animated gif, mpeg...) or shall the user be abel to turn and rotate the model like he wants? Do you also need to include a digital elevation model and surface texture? Wolfgang
-----Ursprüngliche Nachricht----- Von: therion@speleo.sk Gesendet: 06.04.06 11:48:25 An: therion@speleo.sk Betreff: Re: [Therion] zoomify
Wolfgang Zillig wrote:
Why don't you use VRML?
Wolfgang
VRML is dead. I had cave surveys in it and it was never satisfying. The next thing might be:
http://www.xml.com/pub/a/2003/08/06/x3d.html.
Ultimately, computer images are 2D, and the fuss about making high frame rates merely so you can drag the mouse back and forth is, I think, over-rated. Animation in time is very useful on a 3D image, but not necessarily animation in viewing angle. Unfortunately all the tools are optimized to do the latter, but not the former.
Julian T.
_______________________________________________ Therion mailing list Therion@speleo.cz http://www.speleo.cz/mailman/listinfo/therion
_______________________________________________________________ SMS schreiben mit WEB.DE FreeMail - einfach, schnell und kostenguenstig. Jetzt gleich testen! http://f.web.de/?mc=021192
Wolfgang Zillig wrote:
Hello Julian,
it seems that I don't understand what you want. Do you want to show the cave model under fixed viewpoint (animated gif, mpeg...) or shall the user be abel to turn and rotate the model like he wants? Do you also need to include a digital elevation model and surface texture? Wolfgang
I've got what I want. It's something I'm writing for the purposes of Computer Aided Manufacture. I was asking if anyone else thought it could be applied for those lovely cave renderings you have to make a sort of zoomify in 3D. That's all. Julian T. http://www.freesteel.co.uk/cgi-bin/adaptiverough.py
Julian Todd wrote:
Wolfgang Zillig wrote:
Hello Julian,
it seems that I don't understand what you want. Do you want to show the cave model under fixed viewpoint (animated gif, mpeg...) or shall the user be abel to turn and rotate the model like he wants? Do you also need to include a digital elevation model and surface texture? Wolfgang
I've got what I want. It's something I'm writing for the purposes of Computer Aided Manufacture. I was asking if anyone else thought it could be applied for those lovely cave renderings you have to make a sort of zoomify in 3D. That's all.
Nice idea Julian. What does your system need on the server? Are you making the code available? I wonder if by constraining the angles of rotation/elevation to e.g. 10-15 deg steps you could prerender rotated and elevated views to speed up rotation (a la Quicktime VR). Cheers, John
John Pybus wrote:
Nice idea Julian. What does your system need on the server? Are you making the code available?
Yes, if it can be generalized into a utility we can use for this and for other purposes that we could embed in our application. Behind it technically is OpenMesa, Python, a little bit of C++ functioning through swig to render into the OpenMesa windows, and javascript. I don't know of any other implementation of this idea. It's a complex system of demons and call-backs on the server to keep the 3D model in memory so it doesn't get killed after you grab each frame.
I wonder if by constraining the angles of rotation/elevation to e.g. 10-15 deg steps you could prerender rotated and elevated views to speed up rotation (a la Quicktime VR).
We're experimenting with some animation, but it takes lots of memory. As I said, the animation isn't so vital in my opinion as a system for changing the view to the correct place so you can inspect something closely. That's what this could do very well. It's a slight weakening of the standard 3D visualization concept which merits consideration. Julian T.
participants (3)
-
John Pybus -
Julian Todd -
Wolfgang Zillig