OgreWater

[lingfors]

What's this? Could it be...

A release! (Only Direct3D though...)

Controls:
AWSD (QE) + mouse to move around.

Ctrl + 1/2 - Decrease / increase reflection strength
Ctrl + 3/4 - Decrease / increase refraction strength
Ctrl + 5/6 - Decrease / increase water fog
Ctrl + 7/8 - Decrease / increase water blur

1/2 - Decrease / increase red color channel
3/4 - Decrease / increase green color channel
5/6 - Decrease / increase blue color channel

Source code (MIT license) currently being pushed and should be available shortly from here.

Please leave some feedback (Does it work for you or not? What could be improved?). Thanks!

[spacegaier]

Wow, thanks!

Three remarks though:
1. There is some z-fighting going on (see image).
2. When you are above the water and look straigh down on it, you cannot tell that there is water, since you only see the ground. There should be some sort of visible waves.
3. I was not able to see any change when using the mentioned keys.

Fighting.png

[lingfors]

Wow, thanks!

Three remarks though:
1. There is some z-fighting going on (see image).

I don't think that's z-fighting, but rather due to some inaccuracies in the custom clip planes. Easily fixed by offsetting the custom clip planes, but since this is just a small demo I didn't fix it.

2. When you are above the water and look straigh down on it, you cannot tell that there is water, since you only see the ground. There should be some sort of visible waves.

If you increase the refraction amount, terrain under the water surface should "wobble" due to refraction.

3. I was not able to see any change when using the mentioned keys.

Fighting.png

Are you sure you pressed the keys long enough? I made the change pretty slow, so that I could get more control over it. A couple of seconds should be enough to see the change.

[lingfors]

Just to check, does anyone else have the same problem (problem 3) as spacegaier?

[spacegaier]

Just to check, does anyone else have the same problem (problem 3) as spacegaier?

My bad. I had to realize two things first in order to get it working:
1. Do not use the keys in the numpad area.
2. Even numbers do increase values/effects and not the uneven. Somehow I expected otherwise .

[Alexiss]

First of all, thanks a lot for this awesome release.

A quick note about the camera : when rotating the camera, Y axis movements work fine, but X axis movements still follow the axis-aligned plane.

Is it possible, with your current implementation, to achieve the same result as shown in your very first video ? I've been trying to play with settings. Adding more water fog and playing with its colour brought it closer to your original version, but it still wasn't the same.

Cheers,
Alexis

[lingfors]

First of all, thanks a lot for this awesome release.

You're welcome.

A quick note about the camera : when rotating the camera, Y axis movements work fine, but X axis movements still follow the axis-aligned plane.

After a little experimenting, I think I understand what you're talking about. This is after rotating the camera, right? I'll see if I can fix it.

Is it possible, with your current implementation, to achieve the same result as shown in your very first video ? I've been trying to play with settings. Adding more water fog and playing with its colour brought it closer to your original version, but it still wasn't the same.

Probably not. The first video was basically thrown together immediately after I got something that looked anything like water. After that I've changed the normal map lookup routines quite as bit, as well as made the strength of the distortion effect on refraction/reflection dependent on the viewing distance between the water surface and the geometry behind it (i.e. deep water gets more distorted than shallow water).

[lingfors]

Just uploaded a new release, please have a look and tell me what you think.

New in this release:

• Adjustable water height.
• Caustics effect.

Also, please tell me if you'd like to see a port to OpenGL.

[Sslaxx]

Simply for the cross-platform ability if nothing else, OpenGL would be appreciated by folks.

[Zonder]

with mobile devices in the category of cross platform they do need a simpler water solution so I am sure people will love GL support.

[lingfors]

Experimenting with projected grid. Wow, did that open up a can of worms!

[Pyritie]

will this work on other meshes too, like I have a river in my scene so the water's "height" isn't all on one plane

[lingfors]

will this work on other meshes too, like I have a river in my scene so the water's "height" isn't all on one plane

There is untested support for supplying your own geometry, yes. However, all geometry for a given water instance would have to be at the same height, and all water has to be parallell to the y plane.

[lingfors]

Okay, figured out what was going wrong with the projected grid. Note to self: Not allocating enough space in the index buffer leads to very confusing heap corruption errors.

Anyways, geometry part of projected grid seems to be working okay now. Will try to finish the shader parts tomorrow and hopefully have something to show off.

[Pyritie]

will this work on other meshes too, like I have a river in my scene so the water's "height" isn't all on one plane

There is untested support for supplying your own geometry, yes. However, all geometry for a given water instance would have to be at the same height, and all water has to be parallell to the y plane.

Even if I don't want that geometry-moving one that you posted?

[lingfors]

will this work on other meshes too, like I have a river in my scene so the water's "height" isn't all on one plane

There is untested support for supplying your own geometry, yes. However, all geometry for a given water instance would have to be at the same height, and all water has to be parallell to the y plane.

Even if I don't want that geometry-moving one that you posted?

That one is scrapped.

Probably going to do some configurable water detail, from a single 2-triangle plane with normal mapping, to a pretty dense projected grid. And of course the option to provide your own geometry.

But yes, probably going to stick with the limitations posted above, due to how reflection/refraction is handled.

And if my solution is not exactly what you want, the source is released under MIT license.

[Herb]

@lingfors - First off, great work on this and thanks for sharing the source. I really like the water you showcased in the first post via youtube. Is there a way to get a hold of that source?

[lingfors]

@lingfors - First off, great work on this and thanks for sharing the source. I really like the water you showcased in the first post via youtube. Is there a way to get a hold of that source?

Sorry, no, that was long before I put the code under source control.

[architekth]

Really great work! I've tested your demo and the render is really pretty. Unfortunately i don't know why the demo is launched with my Intel HD card and i can't launch it with my nVidia card (On my laptop). So i will test it on my desktop computer later with my nVidia 470GTX !

Great work! And good luck for improving your add-on !

EDIT : Just for information, with my Intel HD Graphics i've 27/30 fps above water and 17/20fps under water with a lot of fog and blur. So it's really great because Intel HD is a really bad chipset.

[Mind Calamity]

Really great work! I've tested your demo and the render is really pretty. Unfortunately i don't know why the demo is launched with my Intel HD card and i can't launch it with my nVidia card (On my laptop). So i will test it on my desktop computer later with my nVidia 470GTX !

Great work! And good luck for improving your add-on !

EDIT : Just for information, with my Intel HD Graphics i've 27/30 fps above water and 17/20fps under water with a lot of fog and blur. So it's really great because Intel HD is a really bad chipset.

Here's a thread that states the exact same problem "Not Detecting Multiple Cards in Laptop", I assume this is what happened to you ? If so it hasn't been fixed yet.

[Beauty]

Thanks for sharing your project.
Now I tested your second demo.
It's nice.

Unfortunately there is a problem with underwater rendering.
There is only reflection and the sky isn't visible. So for example flat water looks like caves:


My suggestion:
Extend the configuration API for use of different settings for over- and underwater rendering.


An other thing:
For the demo it would be fine to display the configuration keys (e.g. as overlay).
Just as an idea

[lingfors]

Thanks for sharing your project.
Now I tested your second demo.
It's nice.

Unfortunately there is a problem with underwater rendering.
There is only reflection and the sky isn't visible. So for example flat water looks like caves:


My suggestion:
Extend the configuration API for use of different settings for over- and underwater rendering.


An other thing:
For the demo it would be fine to display the configuration keys (e.g. as overlay).
Just as an idea

That's not a bug, it is physically correct. I can't see how it renders directly above you, but for angles greater than 50 degrees viewed from below the water surface, the water surface is totally reflective.

[Beauty]

Oh, you are right. I forgot total reflection.
On the other hand underwater rendering still could be improved.
The scene of the screenshot would be correct for a flat water surface without any waves.

In the case of waves, the surface should be different (in comparison to the bottom).
Here I found an example image. (click to enlarge)


I suppose underwater rendering has no high priority (because most games show water only from above).
But if you like, you could improve it.

[lingfors]

Oh, you are right. I forgot total reflection.
On the other hand underwater rendering still could be improved.
The scene of the screenshot would be correct for a flat water surface without any waves.

In the case of waves, the surface should be different (in comparison to the bottom).
Here I found an example image. (click to enlarge)


I suppose underwater rendering has no high priority (because most games show water only from above).
But if you like, you could improve it.

I assume you've found how to change reflection/refraction etc? Otherwise:





But you're right, there's always room for improvement. Any concrete suggestions are very welcome. I am a programmer, not an artist, so my ability to create artistic resources as well as view an image and say "this would look better if foo" is sadly severly lacking. But if I get some nice input on how something should look (or not look) I can probably code it.

That's also the main reason why I posted the code as well as the executable, to let people run it and give me some input.

[syedhs]

Hi,

I can spot two bugs, although both can be either minor or slightly major bugs depending on how you see it

1) Reflection is not following the water wave ie terrain is reflected on the water as if the water is super-cool or not moving at all..
2) Quite minor I must say.. if anti aliasing factor is set to 8 for an example, reflection image is not AA-ed.

The rest is nice so far..