Any Trail
Creates any track under the player's feet and generates RT
Click to download Playground
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[WSAD moves, Spaces paint tracks, 1234 switches different brushes]
Introduction
- AnyTrail allows characters to plot tracks on the RT beneath their feet and calculate fluids and ripples
- Currently supports fluids/tracks/ripples/patterns (can be expanded)
- All functions are done in Compute shader
- Drawing results can be used to render tracks/effects
Details
Currently, four types of tracks are supported, but the system extends its support to drawing any programmed image (such as branches, fractals, noise, etc.) through reasonable data structures.- 2D fluids : Using Euler method to solve 2D NS equations, texture pixels as fluid elements, can be used to draw interactive liquid/gas effects
- Surface ripples : approximates the wave equation and can be used to simulate player interaction with shallow water surfaces
- Trajectory : Continuous circle drawing, can be used to draw continuous trajectory (used in sand, snow, etc.)
- Pattern : Draws a pattern of any shape, controlling random number and position to create a particle effect. Used to draw footprints of any shape to influence ground coloring
How to use
Add Any Trail Canvas component to the object followed by the canvas, speed up the Fluid/Trail/Pattern/Wave Writer component in the brush object, and you're ready to paint
Use cases
- Cartoon water: Shallow water interaction
- Autumn and the stars: The VFX graph interacts with the fluid
- Stylized desert: Use POM sampling tracks to create a sandpit effect
