proc.ops.sdf

Modelling with signed distance fields. An SDF op describes a solid as a function (how far the nearest surface is, and whether a point is inside) and builds a new function out of the ones it is given, so two shapes merge with a smooth fillet, repetition folds a point into one tile, and shelling and displacement are arithmetic on a distance. Nothing allocates a grid until sdf.mesh contours the function or sdf.sample filters a point cloud by it; both predict their sample count from their params and refuse a count past the budget (max_samples raises it) before allocating. value, contour, meshdist and grid are the parts those ops are built from.

ops(geometry, fields, types) returns the family as a map of op id to op def; procPacks/sdf.procPack registers it. A graph calls one of its ops as g.op.<id>({ ... }) and a script as proc.ops.<family>.<op>(...); the procgen toolbox's describeNode answers each in full.

Ops: geometry.to_sdf, sdf.bend, sdf.box, sdf.capsule, sdf.cone, sdf.cylinder, sdf.displace, sdf.elongate, sdf.from_grid, sdf.intersect, sdf.mesh, sdf.mirror, sdf.plane, sdf.position, sdf.repeat, sdf.round, sdf.rounded_box, sdf.sample, sdf.shell, sdf.sphere, sdf.subtract, sdf.taper, sdf.torus, sdf.transform, sdf.twist, sdf.union.

Part of @builtin::systems.procgen.proc; required as @builtin::systems.procgen.proc.ops.sdf.