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 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.
Two computed values gds.js:133 in gdsEntities CadCraft
```
if (it.k === 'boundary') { if (pts.length > 1 && pts[0].x === pts[pts.length - 1].x && pts[0].y === pts[pts.length - 1].y) pts.pop(); if (pts.length >= 3) ents.push({ type: 'poly', layer: lname, color
```
=== in pts[0].x === pts[pts.length - 1].x. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: GDSII layout read and placement.
Two computed values gds.js:133 in gdsEntities CadCraft
```
if (it.k === 'boundary') { if (pts.length > 1 && pts[0].x === pts[pts.length - 1].x && pts[0].y === pts[pts.length - 1].y) pts.pop(); if (pts.length >= 3) ents.push({ type: 'poly', layer: lname, color
```
=== in pts[0].y === pts[pts.length - 1].y. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: GDSII layout read and placement.
Two computed values libitem.js:1715 in emit CadCraft, BimCraft
```
if (c4 && (c4.x !== c3.x || c4.y !== c3.y || (c4.z || 0) !== (c3.z || 0))) faces.push(q[0], q[2], q[3]);
```
!== in c4.x !== c3.x. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Library item geometry from blocks, meshes and tables, Lengths and units for Library items.
Two computed values libitem.js:1715 in emit CadCraft, BimCraft
```
if (c4 && (c4.x !== c3.x || c4.y !== c3.y || (c4.z || 0) !== (c3.z || 0))) faces.push(q[0], q[2], q[3]);
```
!== in c4.y !== c3.y. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Library item geometry from blocks, meshes and tables, Lengths and units for Library items.
Two computed values libitem.js:1715 in emit CadCraft, BimCraft
```
if (c4 && (c4.x !== c3.x || c4.y !== c3.y || (c4.z || 0) !== (c3.z || 0))) faces.push(q[0], q[2], q[3]);
```
!== in (c4.z || 0) !== (c3.z || 0). Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Library item geometry from blocks, meshes and tables, Lengths and units for Library items.
Two computed values m3d/earcut.js:161 in findHoleBridge CadCraft, TakeoffCraft
```
if (hy <= p.y && hy >= p.next.y && p.next.y !== p.y) {
```
!== in p.next.y !== p.y. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Triangulation of faces with holes.
Two computed values m3d/earcut.js:179 in findHoleBridge CadCraft, TakeoffCraft
```
if (locallyInside(p, hole) && (tan < tanMin || (tan === tanMin && (p.x > m.x || (p.x === m.x && sectorContainsSector(m, p)))))) {
```
=== 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: Triangulation of faces with holes.
Two computed values m3d/earcut.js:194 in getLeftmost CadCraft, TakeoffCraft
```
if (p.x < leftmost.x || (p.x === leftmost.x && p.y < leftmost.y)) leftmost = p;
```
=== in p.x === leftmost.x. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Triangulation of faces with holes.
Two computed values m3d/earcut.js:217 in equals CadCraft, TakeoffCraft
```
const equals = (p1, p2) => p1.x === p2.x && p1.y === p2.y;
```
=== in p1.x === p2.x. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Triangulation of faces with holes.
Two computed values m3d/earcut.js:217 in equals CadCraft, TakeoffCraft
```
const equals = (p1, p2) => p1.x === p2.x && p1.y === p2.y;
```
=== in p1.y === p2.y. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Triangulation of faces with holes.
Two computed values m3d/earcut.js:247 in middleInside CadCraft, TakeoffCraft
```
if (((p.y > py) !== (p.next.y > py)) && p.next.y !== p.y && (px < (p.next.x - p.x) * (py - p.y) / (p.next.y - p.y) + p.x)) inside = !inside;
```
!== in p.next.y !== p.y. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Triangulation of faces with holes.
Two computed values m3d/model.js:137 in meshGeometry CadCraft
```
if (g && g.v === mesh.v && !mesh.recording) return g.def;
```
=== in g.v === mesh.v. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Face planes, areas, triangles and solid volume, Drawing an edge: welding, splitting and re-facing, Push/pull, move, stretch, follow me and intersect, Arcs, circles, smooth curves, divide and offset, Dimensions and typed sizes in 3D, Groups, placements and the model file, Welding of imported geometry, Smooth shading and texture placement.
Two computed values m3d/model.js:538 in addEdge CadCraft
```
if (stops[i].v === stops[i + 1].v) continue;
```
=== in stops[i].v === stops[i + 1].v. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Face planes, areas, triangles and solid volume, Drawing an edge: welding, splitting and re-facing, Push/pull, move, stretch, follow me and intersect, Arcs, circles, smooth curves, divide and offset, Dimensions and typed sizes in 3D, Groups, placements and the model file, Welding of imported geometry, Smooth shading and texture placement.
Two computed values m3d/tools.js:1060 in down CadCraft
```
const inSel = this.h.sel.some((x) => x.t === s.t && x.id === s.id);
```
=== in x.t === s.t. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: 3D drawing and editing tools.
Two computed values m3d/unit-table.js:126 in convert CadCraft
```
if (a === b || a.factor === b.factor) return v;
```
=== in a.factor === b.factor. 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 macro.js:46 in call CadCraft
```
if (name === '=') return Number(args[0]) === Number(args[1]) ? '1' : '0';
```
=== in Number(args[0]) === Number(args[1]). 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 pdfmodel.js:136 in isAxisRect CadCraft
```
const isAxisRect = (c) => c.length === 4 && ((c[0].x === c[1].x && c[1].y === c[2].y && c[2].x === c[3].x && c[3].y === c[0].y) || (c[0].y === c[1].y && c[1].x === c[2].x && c[2].y === c[3].y && c[3].
```
=== in c[0].x === c[1].x. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: PDF underlay placement and PDF import.
Two computed values pdfmodel.js:136 in isAxisRect CadCraft
```
const isAxisRect = (c) => c.length === 4 && ((c[0].x === c[1].x && c[1].y === c[2].y && c[2].x === c[3].x && c[3].y === c[0].y) || (c[0].y === c[1].y && c[1].x === c[2].x && c[2].y === c[3].y && c[3].
```
=== in c[1].y === c[2].y. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: PDF underlay placement and PDF import.
Two computed values pdfmodel.js:136 in isAxisRect CadCraft
```
const isAxisRect = (c) => c.length === 4 && ((c[0].x === c[1].x && c[1].y === c[2].y && c[2].x === c[3].x && c[3].y === c[0].y) || (c[0].y === c[1].y && c[1].x === c[2].x && c[2].y === c[3].y && c[3].
```
=== in c[2].x === c[3].x. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: PDF underlay placement and PDF import.
Two computed values pdfmodel.js:136 in isAxisRect CadCraft
```
const isAxisRect = (c) => c.length === 4 && ((c[0].x === c[1].x && c[1].y === c[2].y && c[2].x === c[3].x && c[3].y === c[0].y) || (c[0].y === c[1].y && c[1].x === c[2].x && c[2].y === c[3].y && c[3].
```
=== in c[3].y === c[0].y. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: PDF underlay placement and PDF import.
Two computed values pdfmodel.js:136 in isAxisRect CadCraft
```
const isAxisRect = (c) => c.length === 4 && ((c[0].x === c[1].x && c[1].y === c[2].y && c[2].x === c[3].x && c[3].y === c[0].y) || (c[0].y === c[1].y && c[1].x === c[2].x && c[2].y === c[3].y && c[3].
```
=== in c[0].y === c[1].y. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: PDF underlay placement and PDF import.
Two computed values pdfmodel.js:136 in isAxisRect CadCraft
```
const isAxisRect = (c) => c.length === 4 && ((c[0].x === c[1].x && c[1].y === c[2].y && c[2].x === c[3].x && c[3].y === c[0].y) || (c[0].y === c[1].y && c[1].x === c[2].x && c[2].y === c[3].y && c[3].
```
=== in c[1].x === c[2].x. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: PDF underlay placement and PDF import.
Two computed values pdfmodel.js:136 in isAxisRect CadCraft
```
const isAxisRect = (c) => c.length === 4 && ((c[0].x === c[1].x && c[1].y === c[2].y && c[2].x === c[3].x && c[3].y === c[0].y) || (c[0].y === c[1].y && c[1].x === c[2].x && c[2].y === c[3].y && c[3].
```
=== in c[2].y === c[3].y. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: PDF underlay placement and PDF import.
Two computed values pdfmodel.js:136 in isAxisRect CadCraft
```
const isAxisRect = (c) => c.length === 4 && ((c[0].x === c[1].x && c[1].y === c[2].y && c[2].x === c[3].x && c[3].y === c[0].y) || (c[0].y === c[1].y && c[1].x === c[2].x && c[2].y === c[3].y && c[3].
```
=== in c[3].x === c[0].x. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: PDF underlay placement and PDF import.
Two computed values redline.js:80 in frameOf CadCraft
```
if (!validBounds(b) || b.maxX === b.minX || b.maxY === b.minY) return null;
```
=== in b.maxX === b.minX. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Redline items placed in the drawing.
Two computed values redline.js:80 in frameOf CadCraft
```
if (!validBounds(b) || b.maxX === b.minX || b.maxY === b.minY) return null;
```
=== in b.maxY === b.minY. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Redline items placed in the drawing.
Two computed values sketch.js:143 in cleanStroke CadCraft
```
const sq = ang !== Math.atan2(last.y - first.y, last.x - first.x);
```
!== in ang !== Math.atan2(last.y - first.y, last.x - first.x). Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Pen sketch cleanup.
Two computed values unit-table.js:126 in convert CadCraft, BimCraft, ModelCraft, MarkupCraft, TakeoffCraft, CivilCraft, DetailCraft, PartCraft
```
if (a === b || a.factor === b.factor) return v;
```
=== in a.factor === b.factor. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Unit conversion, Unit table: reading and writing values.
Two computed values usd/earcut.js:162 in findHoleBridge CadCraft, BimCraft, ModelCraft, TakeoffCraft, CivilCraft, DetailCraft, PartCraft
```
if (hy <= p.y && hy >= p.next.y && p.next.y !== p.y) {
```
!== in p.next.y !== p.y. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Polygon triangulation (ear clipping).
Two computed values usd/earcut.js:180 in findHoleBridge CadCraft, BimCraft, ModelCraft, TakeoffCraft, CivilCraft, DetailCraft, PartCraft
```
if (locallyInside(p, hole) && (tan < tanMin || (tan === tanMin && (p.x > m.x || (p.x === m.x && sectorContainsSector(m, p)))))) {
```
=== 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 (ear clipping).
Two computed values usd/earcut.js:195 in getLeftmost CadCraft, BimCraft, ModelCraft, TakeoffCraft, CivilCraft, DetailCraft, PartCraft
```
if (p.x < leftmost.x || (p.x === leftmost.x && p.y < leftmost.y)) leftmost = p;
```
=== in p.x === leftmost.x. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Polygon triangulation (ear clipping).