FluidSurfaceInfo

A water-like surface. Actors can cause ripples by touching it. Unlike xProcMeshes, FluidSurfaceInfos do not deform when damaged.

Properties

FluidSurfaceInfo Group

float AlphaCurveScale

float AlphaHeightScale

byte AlphaMax

does anyone know how to use the surface alpha property of fluidsurfaceinfo to blend a second material onto the peaks of the waves in a water surface? -jeeptrash

bool bShowBoundingBox

bool bUseNoRenderZ

TerrainInfo ClampTerrain (edfindable)

Terrain used for auto-clamping water verts if below terrain level.

color FluidColor

float FluidDamping

between 0 and 1

float FluidGridSpacing

distance between grid points

EFluidGridType FluidGridType

float FluidHeightScale

vertical scale factor

float FluidNoiseFrequency

range FluidNoiseStrength

"Noise" or ripples that exist without a player interaction

float FluidSpeed

wave speed

int FluidXSize

num vertices in X direction

int FluidYSize

num vertices in Y direction

float NoRenderZ

bool OrientTouchEffect

bool OrientShootEffect

float RippleVelocityFactor

How much to ripple the water when interacting with actors

class<Actor> ShootEffect

Class of effect spawned when water surface it shot or touched by an actor

float ShootRadius

How large a radius is affected when water is shot

float ShootStrength

How hard to ripple water when shot

bool TestRipple

float TestRippleSpeed

float TestRippleStrength

float TestRippleRadius

Test ripple that shows only in editor.

class<Actor> TouchEffect

float TouchStrength

float UOffset

float UpdateRate

Rate at which fluid sim will be updated.

float UTiles

float VOffset

float VTiles

float WarmUpTime

Amount of time to simulate during postload before water is first displayed

UnrealScript-Only Properties

array<int> ClampBitmap

Bitmap indicating which water verts are 'clamped' ie. dont move

array<float> Verts0 (transient, const)

array<float> Verts1 (transient, const)

array<byte> VertAlpha (transient, const)

int LatestVerts (transient, const)

box FluidBoundingBox (transient, const)

Current world-space AABB

vector FluidOrigin (transient, const)

Current bottom-left corner

float TimeRollover (transient, const)

float TestRippleAng (transient, const)

FluidSurfacePrimitive? Primitive (transient, const)

array<FluidSurfaceOscillator?> Oscillators (transient, const)

bool bHasWarmedUp (transient, const)

Enums

EFluidGridType

FGT_Square

FGT_Hexagonal

Quick HOWTO

Here is a quick way to get a fluid surface in a level.

1. Add an Actor of class FluidSurfaceInfo to the level.
2. Change the FluidXSize and FluidYSize along with the FluidGridSpacing to size it correctly for the level space you want to use it in.
3. Find the Texture you want to use, and assign it to the first material in the Display → Skins array
4. Tweak extra settings to suit your level.
5. Go shoot it.

Related Topics

• Fluid Surfaces tutorial
• xProcMesh class

Comments

Highlander: It seems that the FluidSurface is unlit by default as well. BTW.. the Class Wikifier is pretty neat

Wormbo: Yeah, it's neat, but it still needs some work. I've redone the Properties section.

Jeeptrash: Anybody know what AlphaCurveScale and AlphaHeightScale do? The UDN tutorial implies that they change the alpha based on the height of a vertex but I can't seem to get this working to demo it. Does it change the alpha of an alpha map in the material? of the whole shader?

The Twiggman: Wow those things are neat. Lol I always wondered how some of the volumes were moving like that, so I decided to find out and I looked at curse3's little area. Now you can just replace that old sheet with one of these for good effects. But doesn't that make you think you can make neat effects like a big web or something and have it ripple as you fall through it.

Category Class (UT2003)