Comments on: Papervision QuadTree Support

By: Fixing Z-Sorting issues with the QuadrantRenderEngine at Papervision 3D Tutorials

Sat, 28 Nov 2009 00:38:11 +0000

[...] The QuadrantRenderEngine use a technique of subdividing the screen into smaller and smaller regions to resolve potential conflicts between triangles. http://blog.papervision3d.org/2008/10/14/papervision-quadtree-support/ [...]

By: flashkarthi

flashkarthi — Mon, 12 Oct 2009 13:26:44 +0000

Nowadays, Posting examples are very rare in this site.
last known example posted a year ago.
Code Gurus are requested to share their experiments.
-Papervision fan.

By: sing

sing — Mon, 16 Mar 2009 18:52:11 +0000

quadtree is nice Thank you Zupko very much,but I’m not sure about other guy have some problem same me. when I use quadtree render DAE file (model),I don’t know why memory will up .It look like kill memory,but when I use Basic render don’t have this problem . I like quadtree because my model is look nice but I can’t fix about this problem.I can’t open ’swf’ more than five minute memory will full.If don’t use DAE I think don’t have problem.

help me plz.

thank you.

By: Deakster

Deakster — Sun, 09 Nov 2008 17:59:38 +0000

Joa Ebert, it is subdividing the 2D screen that is receiving the rendering, not 3D space, hence why it is a quad tree.

By: sHTiF

sHTiF — Thu, 06 Nov 2008 12:59:16 +0000

P.Svilans:
It isnt true, and you are right not all engines use Painters, for example Agile3D can use BSP as well as modified painters, Alternativa3D always use BSP, Away3D have other options for some time as well… And i am sure there are other engines out there that i am not aware of which may use other algorithms as well. However perfect Z-sorting would mean HW supported Z-buffer otherwise it will be always complex to calculate for some type of scenes and scenarios. I did try pixel perfect Z-buffer in Flash and believe me its slow But you are free to do that, afterall i am up for anything new in Flash.

Joa Elbert:
I guess quadtrees are not as complex and heavy to include and also faster than octrees so that would be the reason

By: Joa Ebert

Joa Ebert — Mon, 03 Nov 2008 13:19:28 +0000

Why don’t you use an octree instead of a quadtree?

By: Leymon

Leymon — Sun, 02 Nov 2008 15:02:30 +0000

Thank you Zupko for this great amelioration, after using it it’s difficult to get back to the Basic render.
However, it seems that QuadrantRenderEngine doesn’t support the layers and the effects linked to them (filters, BlendMode…). I don’t know if that issue was risen yet and if solutions were given. What about it?

By: P.Svilans

P.Svilans — Sun, 02 Nov 2008 03:50:57 +0000

Excuse me, but one of your comments in this blog really upset me…

You said the all Flash3D engines use the painters algorithm. This is a false fact, or if true, will be falsified very soon. I just need to find a website and finish my 3d engine up, and the world will see perfect z-sorting in Flash for the first time.

Please don’t make assumptions…it’s not a big thing, but it’s just something that ticks me off…

Very nice work on the quad trees! I like to see cool work arounds!

By: zh.

zh. — Tue, 28 Oct 2008 12:19:04 +0000

I have the same problem as André Anaya. Rendering of doubleSided materials (try bitmap material to see that) is not working as it needs.

By: QuadTree Test with PaperVision3D | ClockMaker Demos

QuadTree Test with PaperVision3D | ClockMaker Demos — Thu, 23 Oct 2008 15:33:43 +0000

[...] QuadTree support with PaperVison3D resolve cross polygon issues. This demo can switch using render engine, these are QuadrantRenderEngine and BasicRenderEngine, by clicking stage. [...]