AT - Swimmer Version 1.583

Press the Swimmer button to turn the swimmer on and off, green means on, red means off
Press the blue Menu button to access the main menu, here you find these options:

Zero: Toggles buoyancy underwater. Useful to enable this with scuba gear and such, if it's off, you will slowly float up when underwater, simulating the buoyancy of the body

SwimAnim...: Let's you change the swimming animation that occurs when you swim on the water surface.

Float: Toggles between floating on water surface, or swimming on water surface. Dive underwater to stop floating, or go to the menu and use this button again, then swim forward

Swim Speed: Adjust the swimming speed between 5 presets. 3 is default, 5 is fastest, and 1 is slowest

Height Adjust: If floating too high, or too low, you can adjust your floating height with this menu

Hide: Minimizes the swimmer hud into a single button; click this button to display the full hud again

Help: Gives this notecard to you

UseFSAO: Toggles the use of Firestorm AO, it will toggle it on and off based on swimming or not

You can put in your own swim animations to the HUD (drag it into contents), and in order to use them, you need to rename them to the format of: swimming,{name}
example: swimming,myswim

Your custom swim animations will automatically show up in the animation selection menu.

You can click the Logo, to visit the Aluveaux Technologies marketplace store!

Prim water:

Put the open source Primwater script into any prim you wish to act as a water volume.

It has to be a volume of water! (like a box that fills out the pool) <-THIS IS IMPORTANT

The highest point of the prim will count as a water surface rotations do not apply!
Use the box of water as the volume to swim inside! If you leave the box of water in any direction, you will stop swimming immidietly!

Do not link various heights of water together, or different water surfaces together, as they'll count together as one water volume, and the highest point of this will be the water surface.

Technical details (for scripters):

The water prim will volume detect for avatars which enter it, once enterred (collision_start) it will send a message to the swim hud, and the hud gets the bounding box of this prim.
The largest Z value of this bounding box will be treated as the water surface height, until the avatar leaves the water.
If the avatar enters another water prim's volume, its bounding box will be checked again, and the largest Z value of that bounding box will be the new water surface.

When the avatar leaves the prim water's volume, the hud resets the water height to the region's LL water.

With these mechanics explained above in mind, you can interact with the water volumes with your own scripts, like make things float on this water.
The Primwater script is open source! (It is really really simple...)