gfx/examples/flowmap

Flowmap Example

A flowmap example. Flow mapping is often used to simulate water motion, by encoding a flow direction using the red and green channel of an image. This example uses three images to compose this effect:

• a flow map, which contains direction vector in the red and green channel
• a water diffuse texture, which will be distorted
• a noise texture, which fixes a common problem with flow maps mentioned in the article Animating Water Using Flow Maps below

Screenshot

Further reading

• Water shader from source engine
• Water Flow in Portal 2 – Valve paper
• Animating Water Using Flow Maps – Graphics Runner
• A Walkthrough of the Special FX of Uncharted 3: Drake's Deception – Page 57
• Water flow shader – icefall games