Tutorial 11. Lines and Curves (64:25 minutes)

This tutorial starts with an explanation of the way Houdini creates curves, and the difference between edges in Houdini and other modelling programs. Then it looks at some nodes which can be used to create and edit curves . These are the Line, Curve, Curvedraw, Add and Ends nodes.

The rest of the video is used to demonstrate some different ways that curves can be used to create procedural geometry from scratch. We make a procedural racing track generator, which takes an input curve and landscape and creates a road and road markings, with barriers along the inside of curves, and piles of tires along the outside. Then we place trees on the landscape that update to avoid being placed on the route of the track.

Other new nodes that are covered in this tutorial are the Sweep node and the Ray node

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