Well, here is a ocean water shader that Steempipe and I converted (but Steempipe did most of the work :P). Okay here are the pics:

Picture 1
Picture 2
The Shader

Constants and what they do:

Vertex Shader Constants
v0 - Vertex Position
v3 - Vertex Normal
v7 - Vertex Texture Data u,v
v8 - Vertex Tangent (v direction)
v5 - Wave Height Scale

c0 - { 0.0, 0.5, 1.0, 2.0}
c1 - { 4.0, .5pi, pi, 2pi}
c2 - {1, -1/3!, 1/5!, -1/7! } //for sin
c3 - {1/2!, -1/4!, 1/6!, -1/8! } //for cos
c4-7 - Composite World-View-Projection Matrix
c8 - ModelSpace Camera Position
c9 - ModelSpace Light Position
c10 - {fixup factor for taylor series imprecision, }
c11 - {waveHeight0, waveHeight1, waveHeight2, waveHeight3}
c12 - {waveOffset0, waveOffset1, waveOffset2, waveOffset3}
c13 - {waveSpeed0, waveSpeed1, waveSpeed2, waveSpeed3}
c14 - {waveDirX0, waveDirX1, waveDirX2, waveDirX3}
c15 - {waveDirY0, waveDirY1, waveDirY2, waveDirY3}
c16 - { time, sin(time)}
c17 - {basetexcoord distortion x0, y0, x1, y1}
c18 - World Martix

Enjoy!

PS: If the link doesn't work right click on them, properties, copy the url and paste it to your browser

EDIT: Fixed some broken links

good work! but how do you set up v5 for the wave height, say how do you change it?

Hey!
Great work! The screenshots look very nice
Unfortunately I can't see the sahder in action because it needs ps 1.4 so... is there possibly any way to convert it to 1.3? This would be very very useful, as maybe everyone has a directx 8 graphics card when my project (and many others running at the moment, too) is finished, but not necessarily an ATI one with ps 1.4! And as great as the shader looks like, it would be quite unfortunate to have to switch off the shader with geforce 4 ord geforce 3 cards wouldn't it?

@ello

The wave height is controled by the c11 vertex shader constant so if you want to change the wave height change the values to something like
vertexshaderconstant[11]={16, 15, 14, 16}; for some weird results
v5... really don't know i guess the vertex shader does that Did i mention that this is a conversion of Ati's shader

Also, the wave appearance and scale is controled by the bumpmap. And if there is some strange shader behavior like a corner of a model being cut of or distorted you must use a model with more vertices (i used a plain old quad for the picture).

@The Matrix

Yeah, i know it's a shame. I'll try to convert it to ps1.3 or lower but who knows when that will be (i'm a shader n00b ) and most of this shader is done by trial and error and Steempipe's help

Is this shader not the same as this: Ocean Water Shader. But your shader is also cool.

Hehe this is great

We have a two almost indentical shaders. I downloaded and converted mine from the ati developers page.

I could have just used yours