Comments on: Pixel precision in Papervision3D

By: hellogrish

hellogrish — Mon, 24 May 2010 23:10:56 +0000

hello there,

so do you have any idea how to get camera.z if I know do3d.z?

the solve given by daddfristy doesnt work
( camera.z = ((camera.zoom – 1) * camera.focus) + 3dobj.z; )

By: Case Prince

Case Prince — Thu, 25 Feb 2010 03:16:20 +0000

Bartek – great article – I find myself coming back and referring to it over and over… but this time your magic formula didn’t quite work? A little trial and error, and I hit on this:

view.camera.z = 1000;
view.camera.focus = 200;
view.camera.zoom = 5;

That seems to do the trick… my cubes’ front faces are at z = 0, so the camera z is the only thing I changed. Is it possible the projection math in PV has changed???

I’m using the latest (rev 934) PV3d from svn:
http://papervision3d.googlecode.com/svn/trunk/as3/trunk/

Thanks for the great article!

By: How to get Pixel Precision in PV3D | xperiments.es

How to get Pixel Precision in PV3D | xperiments.es — Sat, 06 Feb 2010 23:16:07 +0000

[...] por la red he encontrado este interesante post en Everyday Flash en el que explica como ajustar un objeto 3D para que su textura se vea en relacción [...]

By: bartek drozdz

bartek drozdz — Fri, 29 Jan 2010 01:19:46 +0000

I see! Unfortunately I don’t know 3DSMax good enough to help you on that.

By: Erik

Erik — Thu, 28 Jan 2010 18:37:46 +0000

Well, i have a texture (256 x 256) with a pixel pattern.

I want to make a 1:1 render of a plane (with that texture, also 256 x 256) in 3D Studio, so i have a pixel match on Z = 0

I don’t know how to setup a scene like this. Is it possible?

By: bartek drozdz

bartek drozdz — Wed, 27 Jan 2010 23:07:47 +0000

@Erik Hm, I am not sure if I understand what you want to do.

By: Erik

Erik — Wed, 27 Jan 2010 21:46:22 +0000

And does anyone can tell me how to do this in 3D Studio Max?

I want to combine 3D and HTML.

Thanks already!

By: farmazone

farmazone — Tue, 12 Jan 2010 10:53:28 +0000

Hello.

Does anyone can provide me a similar formula to use with Away3D ?

By: Lucas Gabriel

Lucas Gabriel — Wed, 30 Dec 2009 21:53:36 +0000

OMG thx man, thx thx thx many times over. I’m in my very first papervision3d project and it is really giving me head aches. your tutorial is very user-friendly and helped me out quite a bit. THX!

By: jan

jan — Wed, 25 Nov 2009 11:12:02 +0000

Thanks for this great post.
When I try to compile the source with flashdevelop I get this:

Error: a target file must be specified
Use ‘mxmlc -help’ for information about using the command line.
Build halted with errors (fcsh).

any ideas?

btw. I read about a deploy folder in the source, but its missing in the source i got from the link on this page.

Thanks.

By: Simon

Simon — Mon, 02 Nov 2009 15:21:50 +0000

Considering it is a cube, and the property of the Camera3D class are set manual (f.e. like in this example), the correct formula would be:
-((camera.zoom * camera.focus) – Math.abs(camera.z)) – (baseSize/2)

If you do not set the Camera properties, use this formula:
((camera.zoom * camera.focus) – Math.abs(camera.z)) + (baseSize/2)

After doing so, I managed to get this example to work!

By: another_lukasz

another_lukasz — Thu, 22 Oct 2009 13:38:10 +0000

Ok, got it!
Sorry for bothering you, the formula works perfectly. Great article, thanks a lot!

By: another_lukasz

another_lukasz — Tue, 20 Oct 2009 13:56:35 +0000

Hi Bartek,
thanks for that article, but somehow it just wont work with my project. Im reading this for the fifth time, but the result is always the same – my plane gets mutch too close to the camera. Tried every formula, found in the comments, but it doesnt help – its always the same result.
So i ask concretly: Have a plane that measures 300×300 and im using the same measurement for the mc, thats beeing used as the MovieMaterial parameter. The plane is beeing tweened to:
var newZ:Number = (camera.zoom * camera.focus) - Math.abs(camera.z)
Newest 2.1 GW, also tried with 2.0. It becomes to large/close, anyway. Am i doing something wrong?

By: Daniel

Daniel — Tue, 13 Oct 2009 12:53:24 +0000

Help! I doesn’t work with a sphere because the camera makes it disproportionately larger!
Changing the FoV doesn’t work either :(

By: oscar

oscar — Sat, 11 Jul 2009 20:50:56 +0000

Hi, this formula helps a lot, I was testing the code with flash but I cannot get to match the block picture with the background, maybe because my images are to big, maybe you could tell which are the requierements for teh pictures used, I’ll keep playing with the code. Thanks

By: 有米啦 » Blog Archive » Papervision 3D 教程收集

有米啦 » Blog Archive » Papervision 3D 教程收集 — Fri, 10 Jul 2009 16:02:42 +0000

[...] Pixel precision in Papervision3D [...]

By: amani

amani — Thu, 18 Jun 2009 23:39:38 +0000

hi bravooooo very nive work!
but how can i do like this fabulous work?
thank’s a lot

By: miru109's me2DAY

miru109's me2DAY — Sat, 13 Jun 2009 06:30:46 +0000

miru109의 생각…

pv3d 1:1 뷰를 위한 셋팅 계산…

By: Pixel Precision in Papervision | Epic Butter

Pixel Precision in Papervision | Epic Butter — Thu, 14 May 2009 23:25:35 +0000

[...] Full Article [...]

By: Neil

Neil — Wed, 13 May 2009 13:35:50 +0000

Very well explained and your demo shows this perfectly, I thought Mr Doob would like that, its right up his street.

By: Pixel Precision in Papervision 3D | Papervision Tutorials

Pixel Precision in Papervision 3D | Papervision Tutorials — Wed, 29 Apr 2009 10:26:53 +0000

[...] This tutorial offers some magic formula for solving these problems. Useful tips, comments, demo and the source code are at your service as well. [...]

By: How to get Pixel Precision in PV3D - blog.xperiments.es

How to get Pixel Precision in PV3D - blog.xperiments.es — Sat, 18 Apr 2009 23:03:20 +0000

[...] por la red he encontrado este interesante post en Everyday Flash en el que explica como ajustar un objeto 3D para que su textura se vea en relacción [...]

By: mrsteel (mrsteel)

mrsteel (mrsteel) — Thu, 16 Apr 2009 06:13:08 +0000

PV3D pixel precision and calculatin screen coords http://tinyurl.com/65v76b

By: confectionary malfunction » pure unadulterated actionscript geekery

confectionary malfunction » pure unadulterated actionscript geekery — Fri, 20 Mar 2009 21:45:55 +0000

[...] Everyday Flash – Pixel precision in Papervision 3D [...]

By: bartek drozdz

bartek drozdz — Wed, 18 Mar 2009 20:39:03 +0000

@Xavier All of my examples on this blog are built with the Flex SDK which doesn’t use FLA files. To compile it you will need an Actionscript editor. If you haven’t used any, the best choice for the beginning is FlashDevelop – it is free and offers a decent functionality. Here’s some more details and links:

http://www.everydayflash.com/blog/index.php/2008/07/01/flash-on-free-software-flashdevelop-flex-sdk/

By: Xavier

Xavier — Wed, 18 Mar 2009 19:11:45 +0000

can you provide the fla of this file, I am having difficulty making the src file operate

By: bartek drozdz

bartek drozdz — Wed, 21 Jan 2009 08:13:31 +0000

@alex thanks for the fix. Indeed it makes more sense the way you did it in case the camera.z value is not negative.

By: papervision3d - pixel precision - formula bug / CODEISPOETRY

papervision3d - pixel precision - formula bug / CODEISPOETRY — Thu, 15 Jan 2009 16:47:33 +0000

[...] wrote a great article here about showing e.g. an 400×300 px image in the same size in [...]

By: alex

alex — Thu, 15 Jan 2009 16:41:28 +0000

Hi bartek
i’m not shure but maybe i found a bug. when camera.z > 0 your formula does strange things. I change it to

var targetZ1 : Number = (camera.zoom * camera.focus) – (camera.z*-1);

works fine for me.
thank you anyway. you saved me a lot of time ;)

greets
alex

By: Peter Briers

Peter Briers — Mon, 22 Dec 2008 14:55:40 +0000

I use this one in your demo to get it working right:
cube.z = -((camera.zoom * camera.focus) – (Math.abs(camera.z) – baseSize / 2));

Basicly the same as Max’s solution, but with the minus in front of the whole equation.