falling droplet on water

[klibza]

I am looking for a piece of C/C++ code rendering a droplet falling onto water. May anyone help?

thanks in advance

[dasraiser]

hi , i couldn't find much c++ just a lot of pdf's when googling

dont know if this will help

tried google with ... falling water droplets on water c++ ... and ... water droplets c++

loads of techy stuff

try

http://www.codeproject.com/opengl/ds...&select=415748

also Nvidia has a good fluid simulation demo i think with code

anyway good googling

regards

[Zulfiqar Malik]

I think there is a demo of such a feature on Humus 's website.

[klibza]

Thanks a lot for your answers both to you...dasraiser and malik. I found the former URL but not the later, I didn't nknew about it.

Malik can you make it more precise...The Humus website seems huge and I see no search engine...can you help?

again thaks a lot for helping.

Zelda

[Zulfiqar Malik]

Here it is

[klibza]

thanks so much...It maybe a good starting point.

I found something somehow more interesting (I think) but unfortunately it is written in pascal..I don't know much about that language...see http://www.sulaco.co.za/opengl/water.zip it looks fine even though it is far from what I want to realize (falling droplet onto water).

Anyway I have to finalize the mathematic behind this matter...

again thanks alot for all.

[Pnevma]

If you can't find anything that works, and you want to program it, a sinusoudal wave should do the trick.
The problem is actually programming it

[dom_unido]

For a "drop of water", you have basically two partial differential equation models available. The 2D wave equation (think of a pond with some raindrops) and the 3D shallow water equations (think e.g. of a dambreak) both model what you want to see.

Jens Krüger's GPGPU library (http://wwwcg.in.tum.de/Research/Publications/LinAlg) contains a demo of the 2D wave equation, and the RTFFS project (http://rtfss.sourceforge.net/) is an example of the more complex shallow water equation.

This is however only relevant for you if your app is not GPU-bound already, solving properly discretized versions of these PDEs will require at least a couple of Jacobi iterations for visual accuracy. If you can't spare these, go for sinusodial waves and skip the "physically-based modelling" bit.

This page has about a ton of reading material, from "how to texture water" to "how to simulate": http://vterrain.org/Water/

[klibza]

Thanks a lot for all and particularly dom_unido it is exactly what I am trying to do: solve PDEs. But it is quite hard. First the mesh is not easy to initialialize..;I mean the delaunay way. Moreover the physics (mathematics) behind is somehow tricky...So I think it is gonna be a long way to go.
At this time mu milestones are as follows:
1) find good code to mesh water (thanks dom_unido maybe I find something nice there)
2) Find a good PDE Solver...I had a look at matlab but it is useful but difficult to collect the code
3) make this stuff run with opengl...

thanks in advance for any help wherever it comes from!

[dom_unido]

Jens' library does exactly what you want to do. You can find more info on PDE solving over at gpgpu.org btw.