Using ShaderGraph

Table of contents

Create your own shaders using ShaderGraph and the Fluid Frenzy ShaderGraph nodes. You can create custom shaders for the Fluid Simulation, Terraform Terrain, and Procedural particles. To get started it is recommended to look at the example shader found at FluidFrenzy\Runtime\Rendering\Shaders\ShaderGraph\SampleFluidSimple. This example demonstrates how to sample the fluid simulation’s data like the height, depth. velocity, layer, normals and how to apply flowmapping.

Fluid Simulation Nodes

Node Description
ApplyClipSpaceOffset Applies a depth offset to the clipspace position
ClampVector2 Clamps a Vector2 to a given length
ClipFluid Calls hlsl clip to discard any invisible fluid layer’s pixels.
EvaluateWaterFoamMask Evaluate the visibly of the foam based on factors like the selected mode, albedo, and foam mask.
FluidClipHeight Shader subgraph for fluid clip height
FluidUV0To1 Returns the 0 to 1 UV based of the FluidUV from the SampleSimulationData node.
FluidUVGrid Returns the Grid UV based of the FluidUV from the SampleSimulationData node. This UV matches the Unity Terrain height sampling UV.
LayerToMask Converts the layer data from the SampleSimulationData to a -1 to 1 mask.
SampleFoam Samples the fluid simulation’s foam mask.
SampleHeightVelocity Samples the fluid simulation’s height and velocity data.
SampleNormal Samples the fluid simulation’s surface normal.
SampleSimulationData Samples all the fluid simulation data at a provided UV coordinate.
SampleSimulationDataFromPositionOS Samples all the fluid simulation data at a provided object space position.
SampleSimulationDataFromPositionWS Samples all the fluid simulation data at a provided world space position.
SampleTerrain Samples the terrain height used in the fluid simulation.
SampleTex2DFlow Samples the provided texture using the selected flow mapping technique.
SampleTex2DFlowDynamic Samples the provided texture using the dynamic flow mapping technique.
SampleTex2DFlowStatic Samples the provided texture using the static flow mapping technique.
SampleVelocity Samples the fluid simulation’s velocity data.
UVToBorderMask Convert the UV into a soft border fading to black on the edges.
UVToBorderMaskInverted Convert the UV into a soft border fading to white on the edges.

Terraform Terrain Nodes

Node Description
SampleHeightMap Samples the Terraform Terrain Heightmap.
SampleLayers Samples and blends all the layers of the Terraform Terrain shader based on the splatmap mask.

Particle Nodes

Node Description
SampleParticleData Samples the particle simulation’s graphics buffer to retrieve it’s data.
SampleParticleVertexData Sample the vertex position’s of the particle.
TransformParticleToBillboard Transform the particle and particle vertex data into a billboard.