* Trigger a browser download for a binary buffer. * @param {ArrayBuffer|Uint8Array} buffer * @param {string} filename * @param {string} [mime]

Promote the kept-aside custom map back to the active map. No defaults reset.

* Apply a project's texture: custom PNG wins over a named preset. Shared by * both load modes — the displacement map is part of the saved settings.

* Box-blur one row of RGBA pixels (horizontal pass). * Operates in-place reading from `src` and writing to `dst`.

Box-blur one column of RGBA pixels (vertical pass).

Pack a BufferGeometry into binary-STL bytes (80-byte header, uint32 count, 50 bytes per triangle). With restorePose, vertices/normals are mapped back

* Map flat position/normal arrays from the in-app working space back to the * model's original file pose: orig = poseRot⁻¹ · (mem − poseTrans). Undoe

* Compute area-weighted smooth normals for a non-indexed geometry and store * them as a `smoothNormal` vec3 attribute. Every copy of the same positi

* Apply an approximate Gaussian blur (sigma px) to `canvas` in-place. * Uses the native CSS filter on Chrome/Firefox; falls back to a 3-pass * separ

* Compute boundary edge segments between masked and non-masked faces and * pack them into a DataTexture for per-fragment distance queries in the * b

* World-space "period" of the texture along U and V — i.e. how many world * millimetres correspond to one full UV repeat. Mirrors the math in * map

* Count disconnected mesh shells via BFS on the adjacency graph. * @param {Array<Array<{neighbor:number}>>} adjacency - from buildAdjacency * @param

* Squared distance from point P to the closest point on triangle ABC. * Uses the Voronoi-region method (no allocations, pure arithmetic).

* Find pairs of intersecting triangles using spatial hashing for the broad * phase and the Separating Axis Theorem for the narrow phase. * Skips tri

* Find duplicate triangles by exact vertex comparison. * Two triangles are duplicates if they share the same three vertex positions * (bit-identical