Ocean Shader

journeyman17 · April 7, 2009, 9:53am

Hi,

If you’ve been following my other thread ‘Developing Landscape’:

http://blenderartists.org/forum/showthread.php?t=152260

you’ll know that I’ve been experimenting with stencil maps and multiple textures.

For my environment, I created a pretty good ocean shader, which I am now making available to the community.

It uses three GLSL shaders and a stencil map.

Here is a screen shot:

You can download the complete blend file here:
http://www.mediafire.com/?ogqo0lrirnc

*** THIS HAS NOW BEEN UPDATED TO VERSION 1.1
The Version 1.1 file is here:
http://www.mediafire.com/?hwvg2ih3kyn

To change the position of the surface layer of sea foam, you just paint on to the stencil map.

It’s cool because you’re actually painting an animated shader - not just a flat texture.

Enjoy,

Journeyman

Attachments

Mr_Smith · April 7, 2009, 10:11am

That is some really nice work!

John_tgh · April 7, 2009, 10:34am

That’s just F****** awesome! Good man!

DanZMan · April 7, 2009, 10:49am

Pretty good! One thing is the foam shader doesn’t compile correctly because the last line your are assigning a float “color.a” to a vec4 “stencil.” Also, seeing as your only using one value of the stencil map, you could simply change the last lines to this:


float stencil = texture2D(stencilMap, gl_TexCoord[0].st).r;
 
color.a = stencil;
gl_FragColor = color;

This fixes the problem and saves some memory.

Anyway, pretty neat. I like your use of UV coordinates to simulate refraction the best. For a minute there I almost thought you had figured out how to do realtime refraction. Looking forward to seeing more!

Do you plan on including lighting calculations in your shaders?

francoistarlier · April 7, 2009, 1:25pm

it looks so nice, maybe a Chromatic aberration to the water would give this kind of crysis look

Doggie_B · April 7, 2009, 9:56pm

You’re my hero! I was looking for this for ages!

journeyman17 · April 8, 2009, 12:56am

Thanks!

Dazman - well spotted… I will update my code.

I would cool if people could post the frame rates they are getting with these shaders.

I’m getting 60fps when minimised and around 25fps in full screen.

Cheers,
Journeyman

lightning2911 · April 9, 2009, 4:13am

i did a quick testrun and it looks great!

full screen (1920x1200) with dual socket xeon mobo (2xquad core): 60fps
minimised … the same

Mr_Smith · April 9, 2009, 5:19am

It runs perfectly 60 fps on my system.

However I have some problems trying to implement the refraction shader
into my game. Can you post a little tutorial on impementing the shader into
a game, starting from the ground up. :o I’m not good at coding shaders.

journeyman17 · April 9, 2009, 7:17am

Mr Smith…

The easiest way to integrate the Ocean Shader with your own project is as follows:

Goto File | Append or Link

Navigate to the OceanShader.blend

Select ‘Group’

Select ‘Ocean’ then ‘Load Library’

This should load everything including the shaders.

If I can find the time today, I’ll do a longer tutorial.

Cheers,

Journeyman

Mr_Smith · April 9, 2009, 11:01am

Thanks for the response, but linking the file isn’t really possible
in my case. So I would really appreciate if you could pst a longer tutorial. :yes:

yournamehere · April 9, 2009, 2:14pm

I run it at 125 FPS consistantly. Great job!

peace,
-nick

craigsnedeker · April 9, 2009, 2:54pm

Awesome work, but how do I make it larger? Scaling normally stretches the textures.

journeyman17 · April 10, 2009, 2:29am

I think I’ll do a little version update, which includes a ‘large area’ example of the shader. The current shader only covers a small area - like a cove or inlet.

I might do a small video tutorial also.

Stay tuned!

From
Journeyman

journeyman17 · April 10, 2009, 5:35am

Okay!

Here’s a small update, which includes a larger area sea.

The Version 1.1 file is here:

With larger areas, you sometimes see flickering on the horizon, so you need to use Blenders Mist settings to minimize any unwanted artifacts.

I’ve updated the script files also.

There are only two variables you can really play with:

‘speedofwarp’ and ‘sizeofwarp’

which control the amount of distortion and the speed respectively.

If you need to change the scale of the geometry, you will need to scale the UV coordinates by the same amount to maintain the look of the shader.

Enjoy!

Journeyman

Doggie_B · April 11, 2009, 6:31am

Allright! I will use this in my next game for sure.

moffboffjoe · April 19, 2009, 4:24pm

set the size of warping to 1 and the speed of warping to 100 and you get some crazy stuff lol

Benny_Flex · September 1, 2009, 8:46am

From what i saw the rocky textures looks better than the vegetation, maybe it lacks alpha and randomness.

Too bad you don’t want to make it a full game!

thanks journeyman17 for the file, very interesting since i dream for a long time to build a surf game with blender… I m going to study it!

polyman · September 2, 2009, 2:00pm

i get 60 fps regularly on my laptop with a crappy ati card- greeat work!!!

anuragvohraec · September 15, 2009, 1:29pm

Super man great wat a blend. Dear can u give any tutorial for real time reflection or the ocen shader u used or done on yourself