Resources Numerical accuracy

Equality comparisons

Where the code asks whether two decimal numbers are exactly equal. A floating-point result can differ from another in the last digit after a few transformations, so a mesh run through several of them can change the length of an edge, or miss a match. Compare with < or > where a range is meant, and with a documented epsilon where equality is.

316 comparisons to look at
149 files
175 likely to matter (against a decimal, or two computed values)
Scanned November 6, 2026

These are places worth checking, not confirmed bugs. The scan reads how the code is written, not what it is meant to do, so some entries are fine as they are: a test against exactly 0 is often a deliberate guard against dividing by zero. It skips text, counts and indexes, and any comparison it cannot be sure involves decimal numbers, so there are likely more in the code than are listed here.

Two computed values bimcraft.js:4827 in update BimCraft
```
for (const p of editor.placer().placements().filter((x) => x.uuid === r.uuid && Number(x.version) === Number(r.version))) {
```
=== in Number(x.version) === Number(r.version). Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Measurements and typed values in the main window.
Two computed values compute/parity.js:75 in compareImages BimCraft, ModelCraft
```
if (ref.w !== test.w || ref.h !== test.h) throw new Error('parity: pictures of different sizes');
```
!== in ref.w !== test.w. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Statistical comparison of rendered pictures.
Two computed values compute/parity.js:75 in compareImages BimCraft, ModelCraft
```
if (ref.w !== test.w || ref.h !== test.h) throw new Error('parity: pictures of different sizes');
```
!== in ref.h !== test.h. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Statistical comparison of rendered pictures.
Two computed values exr/exr.js:646 in get BimCraft, ModelCraft
```
if (c.width === width && c.height === height) return (i) => c.data[i];
```
=== in c.width === width. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: OpenEXR and Radiance HDR picture files.
Two computed values exr/exr.js:646 in get BimCraft, ModelCraft
```
if (c.width === width && c.height === height) return (i) => c.data[i];
```
=== in c.height === height. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: OpenEXR and Radiance HDR picture files.
Two computed values ifc/geo-tri.js:55 in ring BimCraft, TakeoffCraft, CivilCraft, DetailCraft
```
if (last && first !== last && last.x === first.x && last.y === first.y) remove(last), (last = last.prev);
```
=== in last.x === first.x. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Polygon triangulation by ear clipping.
Two computed values ifc/geo-tri.js:55 in ring BimCraft, TakeoffCraft, CivilCraft, DetailCraft
```
if (last && first !== last && last.x === first.x && last.y === first.y) remove(last), (last = last.prev);
```
=== in last.y === first.y. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Polygon triangulation by ear clipping.
Two computed values ifc/geo-tri.js:62 in rightmost BimCraft, TakeoffCraft, CivilCraft, DetailCraft
```
function rightmost(n) { let r = n, p = n; do { if (p.x > r.x || (p.x === r.x && p.y < r.y)) r = p; p = p.next; } while (p !== n); return r; }
```
=== in p.x === r.x. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Polygon triangulation by ear clipping.
Two computed values ifc/geo-tri.js:77 in bridgeHole BimCraft, TakeoffCraft, CivilCraft, DetailCraft
```
if (a.y !== b.y) {
```
!== in a.y !== b.y. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Polygon triangulation by ear clipping.
Two computed values ifc/geo-tri.js:92 in bridgeHole BimCraft, TakeoffCraft, CivilCraft, DetailCraft
```
if (inside && !(p.x === m.x && p.y === m.y)) {
```
=== in p.x === m.x. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Polygon triangulation by ear clipping.
Two computed values ifc/geo-tri.js:92 in bridgeHole BimCraft, TakeoffCraft, CivilCraft, DetailCraft
```
if (inside && !(p.x === m.x && p.y === m.y)) {
```
=== in p.y === m.y. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Polygon triangulation by ear clipping.
Two computed values ifc/geo-tri.js:118 in isEar BimCraft, TakeoffCraft, CivilCraft, DetailCraft
```
if (p.i !== a.i && p.i !== b.i && p.i !== c.i && (p.x !== a.x || p.y !== a.y) && (p.x !== c.x || p.y !== c.y) && (p.x !== b.x || p.y !== b.y) && inTri(a, b, c, p) && cross(p.prev, p, p.next) <= 0) ret
```
!== in p.x !== a.x. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Polygon triangulation by ear clipping.
Two computed values ifc/geo-tri.js:118 in isEar BimCraft, TakeoffCraft, CivilCraft, DetailCraft
```
if (p.i !== a.i && p.i !== b.i && p.i !== c.i && (p.x !== a.x || p.y !== a.y) && (p.x !== c.x || p.y !== c.y) && (p.x !== b.x || p.y !== b.y) && inTri(a, b, c, p) && cross(p.prev, p, p.next) <= 0) ret
```
!== in p.y !== a.y. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Polygon triangulation by ear clipping.
Two computed values ifc/geo-tri.js:118 in isEar BimCraft, TakeoffCraft, CivilCraft, DetailCraft
```
if (p.i !== a.i && p.i !== b.i && p.i !== c.i && (p.x !== a.x || p.y !== a.y) && (p.x !== c.x || p.y !== c.y) && (p.x !== b.x || p.y !== b.y) && inTri(a, b, c, p) && cross(p.prev, p, p.next) <= 0) ret
```
!== in p.x !== c.x. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Polygon triangulation by ear clipping.
Two computed values ifc/geo-tri.js:118 in isEar BimCraft, TakeoffCraft, CivilCraft, DetailCraft
```
if (p.i !== a.i && p.i !== b.i && p.i !== c.i && (p.x !== a.x || p.y !== a.y) && (p.x !== c.x || p.y !== c.y) && (p.x !== b.x || p.y !== b.y) && inTri(a, b, c, p) && cross(p.prev, p, p.next) <= 0) ret
```
!== in p.y !== c.y. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Polygon triangulation by ear clipping.
Two computed values ifc/geo-tri.js:118 in isEar BimCraft, TakeoffCraft, CivilCraft, DetailCraft
```
if (p.i !== a.i && p.i !== b.i && p.i !== c.i && (p.x !== a.x || p.y !== a.y) && (p.x !== c.x || p.y !== c.y) && (p.x !== b.x || p.y !== b.y) && inTri(a, b, c, p) && cross(p.prev, p, p.next) <= 0) ret
```
!== in p.x !== b.x. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Polygon triangulation by ear clipping.
Two computed values ifc/geo-tri.js:118 in isEar BimCraft, TakeoffCraft, CivilCraft, DetailCraft
```
if (p.i !== a.i && p.i !== b.i && p.i !== c.i && (p.x !== a.x || p.y !== a.y) && (p.x !== c.x || p.y !== c.y) && (p.x !== b.x || p.y !== b.y) && inTri(a, b, c, p) && cross(p.prev, p, p.next) <= 0) ret
```
!== in p.y !== b.y. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Polygon triangulation by ear clipping.
Two computed values ifc/geo-tri.js:153 in between BimCraft, TakeoffCraft, CivilCraft, DetailCraft
```
if ((a.x === b.x && a.y === b.y) || (c.x === b.x && c.y === b.y)) return false;
```
=== in a.x === b.x. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Polygon triangulation by ear clipping.
Two computed values ifc/geo-tri.js:153 in between BimCraft, TakeoffCraft, CivilCraft, DetailCraft
```
if ((a.x === b.x && a.y === b.y) || (c.x === b.x && c.y === b.y)) return false;
```
=== in a.y === b.y. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Polygon triangulation by ear clipping.
Two computed values ifc/geo-tri.js:153 in between BimCraft, TakeoffCraft, CivilCraft, DetailCraft
```
if ((a.x === b.x && a.y === b.y) || (c.x === b.x && c.y === b.y)) return false;
```
=== in c.x === b.x. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Polygon triangulation by ear clipping.
Two computed values ifc/geo-tri.js:153 in between BimCraft, TakeoffCraft, CivilCraft, DetailCraft
```
if ((a.x === b.x && a.y === b.y) || (c.x === b.x && c.y === b.y)) return false;
```
=== in c.y === b.y. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Polygon triangulation by ear clipping.
Two computed values live.js:86 in end BimCraft
```
if (was && now && was.t === now.t && JSON.stringify(enc(was.p)) === JSON.stringify(enc(now.p))) continue;
```
=== in was.t === now.t. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Not in the register.
Two computed values raster.js:171 in openAsc BimCraft, CivilCraft
```
gt: [h.xll, h.dx, 0, h.yll + h.nrows * h.dy, 0, -h.dy], pixelIsPoint: false, cell: h.dx === h.dy ? h.dx : null,
```
=== in h.dx === h.dy. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Elevation grids read from GeoTIFF and ASCII files.
Two computed values render/anim.js:129 in sortKeys BimCraft, ModelCraft
```
for (const k of keys) { if (out.length && out[out.length - 1].t === k.t) out[out.length - 1] = k; else out.push(k); }
```
=== in out[out.length - 1].t === k.t. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Animation keys, curves and poses.
Two computed values render/anim.js:467 in moveKeys BimCraft, ModelCraft
```
for (const k of x.keys) { const last = out[out.length - 1]; if (last && last.t === k.t) { if (moved.has(k) || !moved.has(last)) out[out.length - 1] = k; } else out.push(k); }
```
=== in last.t === k.t. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Animation keys, curves and poses.
Two computed values res-elec.js:238 in changeDevice BimCraft
```
if (nx.height !== d.height) writeDevice(w, nx, readWalls(w, d.storey));
```
!== in nx.height !== d.height. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Electrical devices: positions, loads and circuit amps.
Two computed values res-ui.js:170 in bindRows BimCraft
```
if (e.target.value === 'spiral' && R.stair.width === STAIR_DEFAULTS.width) R.stair.width = SPIRAL_DEFAULTS.width;
```
=== in R.stair.width === STAIR_DEFAULTS.width. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Ground read from a survey file, Figures shown in the residential panels and schedules.
Two computed values res-ui.js:171 in bindRows BimCraft
```
else if (e.target.value !== 'spiral' && R.stair.width === SPIRAL_DEFAULTS.width) R.stair.width = STAIR_DEFAULTS.width;
```
=== in R.stair.width === SPIRAL_DEFAULTS.width. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Ground read from a survey file, Figures shown in the residential panels and schedules.
Two computed values views-ui.js:235 in editCallout BimCraft
```
scale.value = scalesFor(u).some((x) => x.ratio === c.scale) ? String(c.scale) : '0';
```
=== in x.ratio === c.scale. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Not in the register.
Two computed values views-ui.js:348 in rangeFields BimCraft
```
scale.value = scalesFor(u).some((x) => x.ratio === vals.scale) ? String(vals.scale) : '0';
```
=== in x.ratio === vals.scale. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Not in the register.
Two computed values wall-section-graphics.js:165 in cutFaceItems BimCraft
```
const graphic = c.layers && c.detail==='fine' && scale!==c.scale ? {...c,layers:c.layers.map(l=>({...l,hatch:['diagonal','crosshatch'].includes(l.fill)?l.polys.flatMap(p=>hatchSegments(p,[],l.fill==='
```
!== in scale!==c.scale. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Wall layers drawn in plans and sections.
Two computed values addons/cabinet/lib/cutlist/cutlist.js:86 in sameKind CadCraft
```
const sameKind = (a, b) => a.material === b.material && a.thickness === b.thickness && a.length === b.length && a.width === b.width &&
```
=== in a.thickness === b.thickness. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Not in the register.
Two computed values addons/cabinet/lib/cutlist/cutlist.js:86 in sameKind CadCraft
```
const sameKind = (a, b) => a.material === b.material && a.thickness === b.thickness && a.length === b.length && a.width === b.width &&
```
=== in a.width === b.width. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Not in the register.
Two computed values addons/cabinet/lib/draw.js:29 in planEnts CadCraft
```
for (const f of frontsOf(cab, R).filter((g, i, a) => a.findIndex((h) => h.x === g.x) === i)) out.push(rect(f.x * k, D, f.w * k, F));
```
=== in h.x === g.x. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Not in the register.
Two computed values addons/cabinet/main.js:419 in renderPanel CadCraft
```
if (cabs.length) facts = t('panel.facts', { n: cabs.length, pieces: cutList(partsOf(cabs.filter((x) => x.d.u === cabs[0].d.u))).pieces });
```
=== in x.d.u === cabs[0].d.u. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Cabinets along a wall line.
Two computed values addons/cabinetcraft/lib/cutlist/cutlist.js:86 in sameKind CadCraft, BimCraft, ModelCraft, PartCraft
```
const sameKind = (a, b) => a.material === b.material && a.thickness === b.thickness && a.length === b.length && a.width === b.width &&
```
=== in a.thickness === b.thickness. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Cut list sizes, areas and banding lengths.
Two computed values addons/cabinetcraft/lib/cutlist/cutlist.js:86 in sameKind CadCraft, BimCraft, ModelCraft, PartCraft
```
const sameKind = (a, b) => a.material === b.material && a.thickness === b.thickness && a.length === b.length && a.width === b.width &&
```
=== in a.width === b.width. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Cut list sizes, areas and banding lengths.
Two computed values addons/cabinetcraft/lib/draw.js:29 in planEnts CadCraft, BimCraft, ModelCraft, PartCraft
```
for (const f of frontsOf(cab, R).filter((g, i, a) => a.findIndex((h) => h.x === g.x) === i)) out.push(rect(f.x * k, D, f.w * k, F));
```
=== in h.x === g.x. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Cabinet plan, elevation, section and 3D boxes.
Two computed values addons/cabinetcraft/lib/estimate.js:140 in sheetsFor CadCraft, BimCraft, ModelCraft, PartCraft
```
const m = nestJob && nestJob.mats.find((x) => x.material === g.material && x.thickness === g.thickness);
```
=== in x.thickness === g.thickness. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Cabinet job cost estimate.
Two computed values addons/lighting/lib/reports.js:84 in checks CadCraft
```
for (let i = 0; i < spans.length; i++) for (let j = i + 1; j < spans.length && spans[j].u === spans[i].u && spans[j].from <= spans[i].to; j++) {
```
=== in spans[j].u === spans[i].u. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Not in the register.
Two computed values addons/windows/lib/cutlist/cutlist.js:86 in sameKind CadCraft
```
const sameKind = (a, b) => a.material === b.material && a.thickness === b.thickness && a.length === b.length && a.width === b.width &&
```
=== in a.thickness === b.thickness. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Not in the register.
Two computed values addons/windows/lib/cutlist/cutlist.js:86 in sameKind CadCraft
```
const sameKind = (a, b) => a.material === b.material && a.thickness === b.thickness && a.length === b.length && a.width === b.width &&
```
=== in a.width === b.width. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Not in the register.
Two computed values cadcraft.js:506 in rememberView CadCraft
```
if (top && top.cx === v.cx && top.cy === v.cy && top.zoom === v.zoom) return;
```
=== in top.cx === v.cx. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Cursor point and status readouts.
Two computed values cadcraft.js:506 in rememberView CadCraft
```
if (top && top.cx === v.cx && top.cy === v.cy && top.zoom === v.zoom) return;
```
=== in top.cy === v.cy. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Cursor point and status readouts.
Two computed values cadcraft.js:967 in withNextGhost CadCraft
```
if (!was || was.x !== n.x || was.y !== n.y) accessUi?.say(t('access.ghost.next', { what: t('auto.kind.' + n.kind), at: fmtL(n.x) + ', ' + fmtL(n.y) }));   // EG.52: a ghost is said once when it appear
```
!== in was.x !== n.x. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Cursor point and status readouts.
Two computed values cadcraft.js:967 in withNextGhost CadCraft
```
if (!was || was.x !== n.x || was.y !== n.y) accessUi?.say(t('access.ghost.next', { what: t('auto.kind.' + n.kind), at: fmtL(n.x) + ', ' + fmtL(n.y) }));   // EG.52: a ghost is said once when it appear
```
!== in was.y !== n.y. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Cursor point and status readouts.
Two computed values dwg/objects-write.js:659 in insertScale CadCraft, BimCraft, ModelCraft, TakeoffCraft, CivilCraft
```
else if (sx === sy && sx === sz) { w.BB(2); w.RD(sx); }
```
=== in sx === sy. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: DWG object values written and read.
Two computed values dwg/objects-write.js:659 in insertScale CadCraft, BimCraft, ModelCraft, TakeoffCraft, CivilCraft
```
else if (sx === sy && sx === sz) { w.BB(2); w.RD(sx); }
```
=== in sx === sz. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: DWG object values written and read.
Two computed values dwg/table-write.js:71 in insertScale CadCraft, ModelCraft, CivilCraft, DetailCraft, PartCraft
```
else if (sx === sy && sx === sz) { w.BB(2); w.RD(sx); }
```
=== in sx === sy. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Not in the register.
Two computed values dwg/table-write.js:71 in insertScale CadCraft, ModelCraft, CivilCraft, DetailCraft, PartCraft
```
else if (sx === sy && sx === sz) { w.BB(2); w.RD(sx); }
```
=== in sx === sz. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Not in the register.