Changelog

1.2.0 — Manifold 3.5.3 update

This checkout targets upstream v3.5.3 (0edd9d54876f3135e431575214dd6d8a72866fee) plus this project's native extensions (fork integration commit d8778ce9). Release 1.2.0 uses native bindings 2.2.0. The JAR includes matching WASM assets at clj_manifold3d/wasm/manifold.js and manifold.wasm; copy these to your web server and initialize the CLJS runtime as described in the browser usage guide.

Both CLJ and CLJS now expose:

API	Purpose
minkowski-sum, minkowski-difference	Solid dilation and erosion
simplify, get-tolerance, set-tolerance, refine-to-tolerance	Solid simplification and refinement control
smooth-by-normals, calculate-curvature	Smoothing tangents and curvature properties
level-set	Build a solid from a signed distance function
min-gap, ray-cast-segment	Separation and all triangle hits on a finite segment
execution-context, with-context, progress, cancel!, cancelled?	Native progress and cancellation
read-obj-string, write-obj-string	Upstream's precision-preserving, geometry-only OBJ dialect
mesh-data, mesh-run-info	Portable mesh buffers, provenance, backside and normal flags

offset accepts :bevel. calculate-normals now also accepts one argument (default property index 0) or two arguments (explicit index), with upstream's 52.5 degree sharp-angle default. Existing explicit arities remain valid. simplify still accepts cross-sections and JVM polygons; it additionally accepts solids and native Models. Its cross-section default remains 1e-6. The existing smooth-out default remains 60 degrees. Model appearance is retained by simplify, set-tolerance, and refine-to-tolerance; operations that create new surfaces without an appearance policy require a bare Manifold.

(require '[clj-manifold3d.core :as m])

;; In CLJS, await the existing m/init! once before calling geometry functions.
(def rounded
  (m/minkowski-sum (m/cube 10 10 10) (m/sphere 1 24)))

;; Positive SDF values are inside, on both runtimes.
(def implicit-ball
  (m/level-set (fn [[x y z]] (- 4 (+ (* x x) (* y y) (* z z))))
               {:min [-3 -3 -3] :max [3 3 3]} 0.3))

(def hits (m/ray-cast-segment rounded [-5 5 5] [20 5 5]))
;; Each hit has :face-id, :position, :normal, and :distance.
;; :distance is the fraction along the segment, not a length in model units.

The existing ray-cast still takes a direction and returns the nearest hit. The new segment API returns all hits, including coincident hits on adjacent triangles. OBJ string round-tripping retains geometry, not colors, UVs, normals, materials or animation; use GLB for those assets.

Contexts follow upstream's limited propagation rules: attach one immediately before status, an eager refinement, hull or Minkowski operation. Transforms and booleans return values without the attachment; queries such as volume and get-mesh-gl do not observe it. Mesh factories also accept a context via (m/manifold mesh ctx) and (m/smooth mesh sharp-edges ctx), and level-set accepts :context ctx. Cancellation is permanent for that context. CLJS geometry calls are synchronous, so UI cancellation during a call needs worker isolation. Level-set callbacks execute synchronously on the calling thread and propagate Clojure/ClojureScript exceptions after native cleanup.

The stable release was selected to preserve the existing fill rules, tolerance, and smoothing APIs; post-release upstream development removes some of them. See the sibling fork's UPSTREAM_UPDATE.md for the native integration details.