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code/SDFRevolve

Folds a 3D sample into the profile plane of a lathe about the Y axis, spun or screwed.

Sdf3d

Turns a 3D sample position into the 2D point a lathe would sweep through it, so a 2D shape reading that point comes out revolved about Y. Wire this into a 2D primitive's position input and read that primitive's distance as the solid's. The twin of geo/SDFRevolve, for use inside a geo/SDFBuilder sub-network. The profile's plane X is the radial direction, measured out from the axis by `offset`, and its plane Y stays world Y.

Turn `helical` on and the fold screws rather than spins: the profile climbs `pitch` for every turn it makes, so whatever reads the folded point comes out as a thread. A negative pitch cuts a left-hand thread. Screwing stretches distance where spinning does not, so the field a helical fold feeds is a bound rather than a distance and the builder steps its march down to suit it.

Parameters

Name	Type	What it does
P	Vector3	Position to fold. Left unwired it reads the builder's own sample position.
offset	Float	How far out from the Y axis the profile's own origin sits: the radius the profile is swept at.
helical	Bool	Screw the profile instead of spinning it: it climbs by `pitch` every turn, which turns a ring into a thread.
pitch	Float	How far the profile climbs in one turn, read only when helical is on. The sign is the handedness: positive is a right-hand thread, negative a left-hand one.

code/SDFRevolve

Parameters

See also