Houdini Vector Field

Preface

What I’ve learned while making vector field on Houdini. Which will be used in UE4.

Source From

http://www.tokeru.com/cgwiki/index.php?title=HoudiniVolumes

Summary

• SideFX provide “Game Development Toolset”: https://www.sidefx.com/tutorials/game-development-toolset-overview/
• VolumeTrail node needs 2 things
  • Points to trail
  • Velocity Volumes
• Bounds and Scatter node will make scatter dots
• VDBFromPolygons node is useful.

Nomenclature

• Houdini: VFX and 3D modeling software
• VDB: Volumetric Data Blocks (Not really. It is just a name)
• SDF: Signed Distance Field
• VOPs: Vector OPerators

Common Attributes

• P | vector | Point position.
• N | vector | Normal direction.
• V | vector | velocity.
• force | vector | The force attribute on the current point.