Water How To

[The Red Hand]

I post this here because it is more of a resource to others than to show off my personal find. I have found a way to make ocean water in the GE Using < 500 Faces.

First, you take a plane, go to top view, unwrapping to "Project from View (Bounds)," and applying an Alpha Channeled Water Texture to it. To do this, take your water picture and go into the Gimp and change its opacity down to about 0.5, and then save it as anything .png. Then use the fractal tool on it once or twice in blender to get it randomly bumpy. Set a scrolling script to the water so that it looks like it's flowing. You can use this one:

######################
#  UV SCROLL SCRIPT  #
#  by Pepius         #
######################

horizontal = 0
vertical = 1
import GameLogic as GL 
cont = GL.getCurrentController() 
own = cont.getOwner() 
mesh = own.getMesh() 
array = mesh.getVertexArrayLength(0)

#The recomended max. speed is 0.10 and the min. is 0.009
SPEED = own.speed




for v in range(0,array):
    vert = mesh.getVertex(0,v) 
    uv = vert.getUV() 
    uv[1] = uv[1]+SPEED 
    vert.setUV(uv)

This leaves a satisfactory result, but it can be better...

Duplicate the water object and put it about 5-10 units below the first water texture. In this way they should be relatively close. Go into Face Select Mode on the lower Object and scale the unwrapped mesh (In the UV Editor) up just a little so that it overlaps the image by just a little. Go out of UV Select Mode and watch your results!

Here is an image that I fiddled around with that gives you the basic Result.

Hope this helps - and note that this is not a tutorial, but I have seen many threads looking for how to do water. This is my answer. If it is unclear, I can provide a .blend if needed. Good Luck!

[Cloud_GL]

Sweet!
Is not only a good way to make a water effect but also a good way to understand how to controls UVs with python ^^
Thanks

[JellyWerker]

I would like to see that blend.

[alienkid10]

is there anyway to make a alpha channeled water tex in photo shop?

[OTO]

Yes, a .b file would be useful?!

[The Red Hand]

Ahh. Some interest in this thread. I'll upload it now...

Here it is. I hope you enjoy!

[OTO]

Ahhh, it gaves me seasickness!
Very nice!
Thank you for sharing!
Bye

[B3D00]

Very cool! It looks quite realistic, you could make it less bumpy instead of using more faces, so it looks smoother.

[The Red Hand]

Ya. I just popped out that as a technique. You might want to not "Fractalize" it so much and smoothen it out a bit. Works here too!

[alienkid10]

what do I put the script on a py cont?

[The Red Hand]

What?

If I understand you correctly, you put the .py on both water meshes.

[alienkid10]

Do I conect always sensor to a python controller?

[blendenzo]

Originally Posted by alienkid10 Do I conect always sensor to a python controller?

Yes, that's the correct method. Did you download the demo and look at it yet? You should be able to see how it works there.

The Red Hand: This is some of the best non-shader water I've seen to date in the BGE. I'm definitely keeping a copy of this for future reference.

[The Red Hand]

Thanks blendenzo. Glad I could help the community!

[Mico27]

Hey when I use the scrolluv script, I get an error :
File "uvscroll.py", line 13, in <module>
AttributeError: getVertexArrayLenght
Compiled with python version 2.5. ....



and I use the latest version of blender 2.45

[The Red Hand]

Umm, that doesn't happen on mine, but you might want to change it from "getVertexArrayLenght" to "getVertexArrayLenght."

Hope that wasn't a typo on your part, but it doesn't happen for me, but if the problem consists, I'm probably not the person to answer this question.

[MagicMan]

Wow I had something almost identical to this in one of my games. All I was missing was the use of the fractal tool. That adds to the effect a lot. I've made a note to use this technique in the future. Good job.

[Mico27]

Originally Posted by The Red Hand Umm, that doesn't happen on mine, but you might want to change it from "getVertexArrayLenght" to "getVertexArrayLenght." Hope that wasn't a typo on your part, but it doesn't happen for me, but if the problem consists, I'm probably not the person to answer this question.

nope didnt fixed the problem... in fact adding the dot added a syntax error....

[Pret_Letter]

Originally Posted by Mico27 nope didnt fixed the problem... in fact adding the dot added a syntax error....

It wasn't the dot. It's the ht that should be changed into th .
He made 2 typos in one sentence..

[Mico27]

Originally Posted by Pret_Letter It wasn't the dot. It's the ht that should be changed into th . He made 2 typos in one sentence..

Holy shit thanks a lot (I use to speak french so I tought I writed it correctly, I was like WTF?!?!?) now it works