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 Subject: Mapping a Sphere Seamlessly?

Angelouscuitry opened this issue on Nov 08, 2006 · 15 posts

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  Angelouscuitry    ( ) ( posted at 10:09PM Wed, 08 November 2006 

Attached Link: Polar texture mapping

I'm trying to use Bryce to create textures to map a spherical Sky Dome object, in Poser, with.  I see that outputting my Bryce scenes at a 1:2 aspect ratio works well, but leaves a seem.

The attached link mentions how to correct what I'm talking about Mathematically, but is there actual software to do this?


  staigermanus    ( ) ( posted at 11:38PM Wed, 08 November 2006  · @2822963

yes, totally something that you can do as a Lua script in Dogwaffle, Artweaver or the GIMP

www.thebest3d.com/dogwaffle/lua   has samples of scripts. I can try and put this algorithm into a lua script.


  Angelouscuitry    ( ) ( posted at 12:59AM Thu, 09 November 2006  · @2822992

staigermanus - Thank you very much, dogwaffle 1.11b looks very interesting, but I would'nt want you to go through all of this trouble, I'm sure someone has already been through all of this math?  Maybe we'll get lucky and someone will leave a link to a Photohop Plugin, Action, or other pre-fab software?


  Erlik    ( ) ( posted at 1:22AM Thu, 09 November 2006  · @2823002

Google is your friend. :) The Photoshop Spherical Mapping Corrector by Richard Rosenman is a freeware Photoshoop plugin. And Maxon has a tutorial on creating a spherical texture from Bryce sky for Cinema 4D.

-- erlik

  staigermanus    ( ) ( posted at 2:01AM Thu, 09 November 2006  · @2823016

I just converted the algorithm from your link to Lua. I'll post it here shortly:

www.thebest3d.com/dogwaffle/lua/polar

it was a great little exercise. It runs very fast. Lua is super fast as a scripting engine.

You can use the freeware version of Dogwaffle  (v1.2), no need to buy any of the commercial versions. Lua (the DogLua) filter plugin works with the v1.2, the evrsion 2.x, PD Pro 3 and 4 and I think also PD Artist (the $39 version)


  Angelouscuitry    ( ) ( posted at 2:09AM Thu, 09 November 2006  · @2823017

O' Wow, Erlik, thank you so much, this even uses the example image of my link!

The DL link at the page you linked to does'nt work, but here is a link to Richard Rosenman's Home/Download page!

Thanks again!

:woot:


  rickymaveety    ( ) ( posted at 9:39AM Thu, 09 November 2006  · @2823170

I will have to try this out.  I had been using HDR Shop to do that.

Could be worse, could be raining.

  staigermanus    ( ) ( posted at 8:59AM Sun, 12 November 2006  · @2825403

Quote - staigermanus - Thank you very much, dogwaffle 1.11b looks very interesting, but I would'nt want you to go through all of this trouble, I'm sure someone has already been through all of this math?  Maybe we'll get lucky and someone will leave a link to a Photohop Plugin, Action, or other pre-fab software?

1.11b is a bit old now, btw, there's a world of difference between v1.11b from 4-5 years ago and the latest version 4, even 3.7, and even the latest freeware version 1.2 from 2.8 years ago, it's probably like comparing Photoshop 3 to CS2.

I've tested my script with the gluas script and GIMP 2.2, it runs well there too. Though quite a bit faster (make that significatly faster) on PD Pro.

Anyway, this now makes it possible for anyone who can't afford Photoshop to get this function running for free on Dogwaffle, on the GIMP and also on ArtWeaver, which incidentally also has a direct plugin to PD Pro and PD Particles.

Happy scripting!


  TheBryster    ( ) ( posted at 9:12AM Sun, 12 November 2006  · @2825413

Bryster scratches his head and wonders what the hell they are talking about.............😕

Available on Amazon for the Kindle E-Reader

All the Woes of a World by Jonathan Icknield aka The Bryster


And in my final hours - I would cling rather to the tattooed hand of kindness - than the unblemished hand of hate...


  Angelouscuitry    ( ) ( posted at 8:11PM Wed, 15 November 2006  · @2828667

TheBryster - This is all about mapping a sphere object without making a seam.  I take you have done much of this?  Have I missed something?


  TheBryster    ( ) ( posted at 8:23PM Wed, 15 November 2006  · @2828679

Angel: I have done none of this....or at least very little. I generally mess about with the material editor until I get it right. My problem is that by the time I've finished, I can't remember what I did.

Available on Amazon for the Kindle E-Reader

All the Woes of a World by Jonathan Icknield aka The Bryster


And in my final hours - I would cling rather to the tattooed hand of kindness - than the unblemished hand of hate...


  rickymaveety    ( ) ( posted at 8:55PM Wed, 15 November 2006  · @2828687

Bryster, there are ways to seamlessly map a sphere using pictures or a panoramic picture.  I usually use HDRShop to do it.

I've also used that to make what I've heard called a "magic cube" which is a cube primitive that is mapped differently on each side.  In fact, you can take a cube, and without doing any boolean operations, open up one side of the cube to see the interior.

It's fun. 

Could be worse, could be raining.

  TheBryster    ( ) ( posted at 9:09PM Wed, 15 November 2006  · @2828700

Ricky: Hollywood Effects - a program for generating special effects for movies - uses the same kind of thing for 'transisitions'. Looks great too!

Available on Amazon for the Kindle E-Reader

All the Woes of a World by Jonathan Icknield aka The Bryster


And in my final hours - I would cling rather to the tattooed hand of kindness - than the unblemished hand of hate...


  rickymaveety    ( ) ( posted at 9:10PM Wed, 15 November 2006  · @2828701

Is it expensive??

Could be worse, could be raining.

  TheBryster    ( ) ( posted at 9:18PM Wed, 15 November 2006  · @2828705

Attached Link: http://www.pinnaclesys.com/PublicSite/us/Home/

Ricky: I got it bundled with Pinnacle Studio when I bought my DV Movie camera. You might wanna checkout PINNACLE STUDIO. (see link) - Hollywood Effects.

Available on Amazon for the Kindle E-Reader

All the Woes of a World by Jonathan Icknield aka The Bryster


And in my final hours - I would cling rather to the tattooed hand of kindness - than the unblemished hand of hate...


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