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1. Shader/UDK - Atmospheric Sky Scattering - Code sections not available?

   

   Topic by Ace-Angel · May 2012 · Home› Technical Talk

   Hey to all, I was wondering if anyone knew a good way to substitute certain function or math for application that don't have certain functions available? For example, I'm trying for a Atmospheric Scattering material in UDK, but there are snippets of code which don't work in UDK, like this for example: Currently, UDK…

2. Re: Shader/UDK - Atmospheric Sky Scattering - Code sections not available?

   

   Reply by haiddasalami · May 2012 · Home› Technical Talk

   Hey Ace, if I remember right distance node comes in Unreal Units so you need to scale it.

3. Re: Shader/UDK - Atmospheric Sky Scattering - Code sections not available?

   

   Reply by Ace-Angel · May 2012 · Home› Technical Talk

   Hey Haid, That's a start, but any ideas on how I would go about doing that? I'm not sure how or what UDK's values vs. others is, google is coming up empty. I'm guessing it's scaled to Max?

4. Re: Shader/UDK - Atmospheric Sky Scattering - Code sections not available?

   

   Reply by ambershee · May 2012 · Home› Technical Talk

   In Unreal Tournament games it is. In Gears of War it is 1UU to 1/2 inch.

5. Re: Shader/UDK - Atmospheric Sky Scattering - Code sections not available?

   

   Reply by almighty_gir · May 2012 · Home› Technical Talk

   1/2 inch != 1cm 1/2 inch = 1cm * 2.54 * 0.5 = 1.27 1UU in GoW = 1.27cm

6. Re: Shader/UDK - Atmospheric Sky Scattering - Code sections not available?

   

   Reply by Ace-Angel · May 2012 · Home› Technical Talk

   Sooo...based upon all this information, at least on a shader level, I'm pretty much plugged in my dark hole (aka fucked?).

7. Re: Shader/UDK - Atmospheric Sky Scattering - Code sections not available?

   

   Reply by Froyok · May 2012 · Home› Technical Talk

   That's the case but : Same case from Maya. The Units are also dependent of the game you use because they are specified in the script files. Gears of war use character much taller than in Unreal Tournament. The "mobile" gametype in UDK use a player size larger than in the UT DeathMatch gametype for example.

8. Re: Shader/UDK - Atmospheric Sky Scattering - Code sections not available?

   

   Reply by Brice Vandemoortele · May 2012 · Home› Technical Talk

   or: sqrt(dot(v,v))

9. Re: Shader/UDK - Atmospheric Sky Scattering - Code sections not available?

   

   Reply by haiddasalami · May 2012 · Home› Technical Talk

   Hey Ace sorry cant be of much further help, maybe try making the length formula back up for the vector? so: sqrt(x^2, y^2, z^2)

10. Re: Shader/UDK - Atmospheric Sky Scattering - Code sections not available?

    

    Reply by cptSwing · May 2012 · Home› Technical Talk

    i thought 1 UU = 2cm?