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Re: WebGL renderer
avatarNovember 22, 2012 01:02AM
Quote
Steffen
the improvements which I spontaneously like to collect here, jumping to my eye or mind, are

(a) rotation center:
The center of rotation currently seems to be hardcoded 0/0/0.
I would better like to have it at the model's center, like in LDView.
Using the mouse currently in your web app feels so different than LDView,
that it confuses me. I would love to see a big similarity in mouse handling between the 2 tools.

Yes that's hardcoded now. I don't know if ldview calculates the center automatically or uses some metadata in the file. i have to make some tests.
About the mouse, i just thrown in a working system, it surely can be improved, and it needs zooming with the wheel :)

Quote
Steffen
(b) incremental parts display:
perhaps it is very easy to do, and you could show the model already while it is loading.
the user can watch the downloaded parts appear in the model.
I think it could be quite cheap to do, because you already know all the matrices etc, just the "real" part data is missing.
Thus, you could already build up the necessary data structures, and skip them on rendering, while the model is not fully loaded.
I think this would be an evern more "incremental" load than displaying the progress status message :D

Yeah i considered it too.. Seeing the model progressively being built would be awesome. It might not be very hard but needs some modifications on the program.

Quote
Steffen
(d) default color 16:
Nicola, you seem to currently use 0/0/0 always for default color 16.
I would prefer if you would use the color specified explicitly in LDConfig.ldr (some "medium" default grey).
To you already use that file? You can always get the most recent version also from the ldraw.org site.

I've yet to understand completely how color works, but i got that 16 is actually the "current color", and i correcly substitute it with what "parent lines" says, it's not hardcoded to 0. What i miss is the whole "complementary" colors and code 24.

Quote
Steffen
(e) edges:
you currently are not rendering edges at all.
I would like to have a checkbox or button for toggling that on and off.
It should be nearly trivial to add the drawing of them to your existing implementation.

Normal edges would be trivial, conditional edges will be not :) They're one of the most puzzling quirks of LDraw file model. Basically you cannot just send them to OpenGL as a bunch of vectors, you have to manually test one by one and decide if you should draw them with a quite complex algorithm. It looks like some kind of hardcoded, precalculated "toon shading" like algorithm?
What i'd like to do is to use them to see if faces should be smooth or flat (basically what they tell is if the two faces should be "curved" or separated) so that i can render curved part nicely, but that require some work.

Quote
Steffen
Nicola, I am again falling of my chair, impressed.
I just tested the attached file, which uses an LSYNTH synthesized cable,
plus unofficial parts, it loaded quickly and smooth, and looked beautiful!

That's not my merit, LSynth generates standard faces, i didn't do anything special for it :)

Quote
Steffen
var flip = geometry._inverting ^ (det<0.0) ^ (!ccw); // kungfu

hahahaha, liked that

Lol, that code required quite a lot of trial and error :) Another quirk of LDraw is how it mixes CCW and CW faces and how it "inverts" subparts :)
SubjectAuthorViewsPosted
WebGL renderer Nicola1966November 16, 2012 06:58AM
Re: WebGL renderer Michael Heidemann472November 16, 2012 01:08PM
Re: WebGL renderer Attachments Michael Heidemann439November 25, 2012 08:00AM
Re: WebGL renderer Nicola429November 26, 2012 01:15AM
Re: WebGL renderer Travis Cobbs550November 26, 2012 12:31PM
Re: WebGL renderer Michael Heidemann533January 01, 2013 12:03AM
Re: WebGL renderer Nicola402January 15, 2013 08:29AM
Re: WebGL renderer Attachments Nicola440January 15, 2013 12:25PM
Re: WebGL renderer Roland Melkert459January 15, 2013 02:16PM
Re: WebGL renderer Nicola428January 16, 2013 12:31AM
Re: WebGL renderer Michael Heidemann384January 16, 2013 07:57AM
Re: WebGL renderer Nicola403January 16, 2013 08:37AM
Re: WebGL renderer Philippe Hurbain482November 16, 2012 01:51PM
Re: WebGL renderer Tim Gould459November 16, 2012 02:12PM
Re: WebGL renderer Steffen483November 16, 2012 04:57PM
Re: WebGL renderer Nicola417November 17, 2012 08:23AM
Re: WebGL renderer Steffen508November 17, 2012 03:28PM
Re: WebGL renderer Tim Gould483November 17, 2012 03:57PM
Re: WebGL renderer Nicola520November 18, 2012 05:05AM
Re: WebGL renderer Travis Cobbs427November 17, 2012 06:17PM
Re: WebGL renderer Nicola490November 18, 2012 05:15AM
Re: WebGL renderer Steffen403November 18, 2012 06:14AM
Re: WebGL renderer Tim Gould464November 18, 2012 12:58PM
Re: WebGL renderer Nicola458November 21, 2012 11:23AM
Re: WebGL renderer Willy Tschager373November 21, 2012 01:49PM
Re: WebGL renderer Philippe Hurbain479November 21, 2012 09:51PM
Re: WebGL renderer Nicola491November 22, 2012 12:47AM
Re: WebGL renderer Philippe Hurbain482November 22, 2012 01:09AM
Re: WebGL renderer Willy Tschager458November 22, 2012 01:45AM
Re: WebGL renderer Philippe Hurbain438November 22, 2012 02:01AM
Re: WebGL renderer Nicola434November 22, 2012 02:26AM
Re: WebGL renderer Philippe Hurbain429November 22, 2012 02:55AM
Re: WebGL renderer Philippe Hurbain554November 22, 2012 01:05AM
Re: WebGL renderer Steffen427November 21, 2012 03:41PM
Re: WebGL renderer Steffen375November 21, 2012 03:52PM
Re: WebGL renderer Nicola396November 22, 2012 01:02AM
Re: WebGL renderer Philippe Hurbain427November 22, 2012 01:21AM
Re: WebGL renderer Steffen402November 22, 2012 12:29PM
Re: WebGL renderer Nicola438November 23, 2012 02:44AM
Re: WebGL renderer Philippe Hurbain437November 23, 2012 04:18AM
Re: WebGL renderer Steffen407November 23, 2012 11:07AM
Re: WebGL renderer Steffen399November 23, 2012 10:57AM
Re: WebGL renderer Attachments Steffen435November 21, 2012 04:02PM
Re: WebGL renderer Steffen388November 21, 2012 04:13PM
WebGL in Firefox (or other Mozilla browsers?) Steffen861November 22, 2012 01:11PM
Re: WebGL renderer Ken Drew433November 21, 2012 05:25PM
Re: WebGL renderer Willy Tschager438November 22, 2012 08:05AM
Re: WebGL renderer Nicola430November 22, 2012 10:45AM
Re: WebGL renderer Steffen501November 22, 2012 12:34PM
Re: WebGL renderer Willy Tschager76November 13, 2014 03:51AM
Re: WebGL renderer Steffen80November 14, 2014 02:53PM
Re: WebGL renderer Nicola434November 28, 2012 02:22PM
Re: WebGL renderer Philippe Hurbain394November 29, 2012 12:19AM
Re: WebGL renderer Travis Cobbs483November 29, 2012 03:42PM
Re: WebGL renderer Nicola463December 14, 2012 03:05AM
Re: WebGL renderer Philippe Hurbain368December 14, 2012 04:29AM
Re: WebGL renderer Nicola384December 14, 2012 05:06AM
Re: WebGL renderer Philippe Hurbain360December 14, 2012 05:11AM
Re: WebGL renderer Steffen351December 15, 2012 02:44PM
Also trying LDraw in WebGL Daniel B543December 28, 2012 05:10AM
Re: Also trying LDraw in WebGL Daniel B414December 28, 2012 01:23PM
Re: Also trying LDraw in WebGL Nicola343January 15, 2013 08:31AM
Re: WebGL renderer Michael Horvath430December 31, 2012 09:28AM
Re: WebGL renderer Nicola346January 15, 2013 08:34AM
Re: WebGL renderer Michael Heidemann377January 15, 2013 08:38AM
Re: WebGL renderer Michael Horvath400January 25, 2013 02:46PM
Re: WebGL renderer Nicola359January 28, 2013 04:49AM
Re: WebGL renderer Roland Melkert388January 28, 2013 01:56PM
Re: WebGL renderer Michael Horvath58November 29, 2014 05:19PM
Re: WebGL renderer Michael Heidemann371January 28, 2013 02:19PM
Re: WebGL renderer Steffen393January 28, 2013 02:37PM
Re: WebGL renderer Travis Cobbs456January 28, 2013 02:45PM
Re: WebGL renderer Rolf Osterthun318August 21, 2013 07:52AM
Re: WebGL renderer Nicola280August 21, 2013 08:01AM
Re: WebGL renderer Willy Tschager316August 30, 2013 07:39AM
Re: WebGL renderer Nicola342August 30, 2013 07:57AM
Re: WebGL renderer Rolf Osterthun255September 12, 2013 10:23AM
Re: WebGL renderer Orion Pobursky294September 12, 2013 11:38AM
Re: WebGL renderer Steffen254September 13, 2013 06:19PM
Re: WebGL renderer Nathanel Titane31December 06, 2014 02:20PM
Re: WebGL renderer Steffen276August 30, 2013 10:29AM
Re: WebGL renderer Orion Pobursky316September 18, 2013 04:09PM
Re: WebGL renderer Rolf Osterthun324September 19, 2013 01:30AM
Re: WebGL renderer Orion Pobursky228September 19, 2013 01:40PM
Re: WebGL renderer Orion Pobursky269September 19, 2013 02:00PM
Re: WebGL renderer Orion Pobursky273September 19, 2013 02:49PM
Re: WebGL renderer Orion Pobursky354September 19, 2013 04:15PM
Re: WebGL renderer Nicola269November 19, 2013 05:39AM
Re: WebGL renderer Steffen258November 20, 2013 04:54PM
Re: WebGL renderer Orion Pobursky259November 20, 2013 05:56PM
Re: WebGL renderer Steffen281November 22, 2013 06:44PM
Re: WebGL renderer Lucas GIRARD262March 08, 2014 08:34AM
Re: WebGL renderer Nathanel Titane40December 05, 2014 11:10PM
Re: WebGL renderer Rolf Osterthun35December 06, 2014 12:28PM
Re: WebGL renderer Nathanel Titane27December 06, 2014 01:51PM
Re: WebGL renderer Nathanel Titane28December 06, 2014 03:05PM
Re: WebGL renderer Nicola43December 15, 2014 03:59AM
Re: WebGL renderer Nathanel Titane30December 06, 2014 03:05PM
Re: WebGL renderer Nathanel Titane43December 06, 2014 10:26PM



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