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+--- Thread: Free 3-D Tree Generator: Dryad (/thread-2821.html)
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Free 3-D Tree Generator: Dryad - Leisure Suit Lurie - Jan 16, 2008 06:49 PM
http://dryad.stanford.edu/download.php
free 3d tree (try saying that 3 times fast)
Free 3-D Tree Generator: Dryad - FlamingHairball - Jan 16, 2008 08:51 PM
It got posted on the C3D forum twice already.
Free 3-D Tree Generator: Dryad - TomorrowPlusX - Jan 17, 2008 12:36 PM
It produces huge .obj files, though. I assume a good modeling app can simplify that geometry, however.
Free 3-D Tree Generator: Dryad - AnotherJake - Jan 17, 2008 04:45 PM
TomorrowPlusX Wrote:It produces huge .obj files, though. I assume a good modeling app can simplify that geometry, however.
Results will vary based upon the mesh decimation algorithm being used of course. Maya seems to have a good one, but I've found it does some wacky stuff too. There is a script available for Cheetah3D which seems to be alright, but not as good. Plus Martin seems to be refusing to load mtl files in C3D, so that might present a usability problem there. Maybe this is just the nudge he needed? It would definitely be better if there were a way to lower the poly count during creation. I haven't played with the app myself yet. Just how HUGE are we talking about here? Anything over a couple hundred triangles for trees in real-time scenery seems like it'd be pretty unusable except for central objects.
Free 3-D Tree Generator: Dryad - FlamingHairball - Jan 17, 2008 04:49 PM
From the C3D forum…
Quote:I love how they suggest it as a tool for making trees for games ... yeah 20MB of geometry and 350k triangles per tree... Riiiight.
Free 3-D Tree Generator: Dryad - AnotherJake - Jan 17, 2008 04:55 PM
Hairball183 Wrote:From the C3D forum…
You've GOT to be kidding me!
Free 3-D Tree Generator: Dryad - FlamingHairball - Jan 17, 2008 05:00 PM
About what?
Free 3-D Tree Generator: Dryad - AnotherJake - Jan 17, 2008 05:08 PM
Hairball183 Wrote:About what?
Sorry, the quote didn't get quoted:
Quote:20MB of geometry and 350k triangles per tree...
Do they even make cards that can do 350k triangles at 30fps for the Mac? Regardless, that is utter insanity on a per-tree basis ...
Free 3-D Tree Generator: Dryad - FlamingHairball - Jan 17, 2008 05:09 PM
Well, considering the fact that it was posted by PodPerson(Space Weasel Game), I'd say he knows what he's talking about.
Edit: and I know nothing about Video Cards, so I can't tell you that.
Free 3-D Tree Generator: Dryad - AnotherJake - Jan 17, 2008 05:23 PM
Hairball183 Wrote:Edit: and I know nothing about Video Cards, so I can't tell you that.
Hehe... It was more of a rhetorical question. 350K triangles *is* ridiculous for real-time 3D. Considering a wide range of currently available hardware, <50k for the entire scene is probably a more acceptable standard, although there are certainly cards available which can handle much more than that comfortably. I prefer <40k myself for best compatibility with ~GMA950. 7 *times* that for one single object in a real time game, much less a lowly tree, is absurd on basically *any* card.
PodPerson has worked a lot with Unity, so he is very familiar with performance limitations. I haven't visited the C3D forums in a while. I prolly should do a stop-by to see what's up around there...
Free 3-D Tree Generator: Dryad - macnib - Jan 17, 2008 05:33 PM
I tried Dryad a few days ago. Pretty cool. Though, importing into Cheeta3D had some oddities in the model. A few stretched polygons I had to delete.
Ya, not good for realtime graphics. But still nice for rendering billboard images.
Free 3-D Tree Generator: Dryad - AnotherJake - Jan 17, 2008 05:39 PM
macnib Wrote:I tried Dryad a few days ago. Pretty cool. Though, importing into Cheeta3D had some oddities in the model. A few stretched polygons I had to delete.
That more than likely means that Dryad is outputting incorrectly formatted .obj data somewhere in there. I've tested my obj loader alongside C3D's and I can say that C3D's loader is pretty robust and can handle some fairly odd files gracefully. I think mine is still a little better at handling oddball files than Martin's though -- plus I load mtl files.
Free 3-D Tree Generator: Dryad - OneSadCookie - Jan 17, 2008 06:30 PM
Triangle count is only really relevant if you care about GMA 950, up to some upper limit of VRAM/PCIe bandwidth. 500k triangles per frame wouldn't worry me greatly for modern hardware, if that's what it took.
Fill rate (pixels filled) is way more limiting.
Free 3-D Tree Generator: Dryad - AnotherJake - Jan 17, 2008 06:33 PM
So then if there were only one tree in the scene it would be okay on modern hardware I suppose.
Free 3-D Tree Generator: Dryad - ERaZer - Jan 17, 2008 06:35 PM
Some people might want to use it and prerender the trees for 2D games etc.
And free is always free
