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 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).
Two computed values usd/earcut.js:218 in equals CadCraft, BimCraft, ModelCraft, TakeoffCraft, CivilCraft, DetailCraft, PartCraft
```
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: Polygon triangulation (ear clipping).
Two computed values usd/earcut.js:218 in equals CadCraft, BimCraft, ModelCraft, TakeoffCraft, CivilCraft, DetailCraft, PartCraft
```
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: Polygon triangulation (ear clipping).
Two computed values usd/earcut.js:248 in middleInside CadCraft, BimCraft, ModelCraft, TakeoffCraft, CivilCraft, DetailCraft, PartCraft
```
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: Polygon triangulation (ear clipping).
Two computed values usd/geom.js:92 in valueAt CadCraft, BimCraft, ModelCraft, TakeoffCraft, CivilCraft, DetailCraft, PartCraft
```
if (!a || !b || a.t !== b.t || typeof a.v === 'string' || a.t.startsWith('quat') || a.t.includes('token') || a.t === 'bool') return a;
```
!== in a.t !== b.t. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: USD transforms and placement, USD mesh coordinates in saved and exported files.
Two computed values view.js:363 in syncEntered CadCraft
```
if (b.cx !== vp.cx || b.cy !== vp.cy || b.s !== vp.s || b.tw !== (vp.tw || 0)) {
```
!== in b.cx !== vp.cx. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Picked points, object snaps and viewport views, 2D drawing on screen.
Two computed values view.js:363 in syncEntered CadCraft
```
if (b.cx !== vp.cx || b.cy !== vp.cy || b.s !== vp.s || b.tw !== (vp.tw || 0)) {
```
!== in b.cy !== vp.cy. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Picked points, object snaps and viewport views, 2D drawing on screen.
Two computed values geotech.js:230 in interp CivilCraft
```
return b.x === a.x ? b.z : a.z + ((x - a.x) / (b.x - a.x)) * (b.z - a.z);
```
=== in b.x === a.x. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Boring logs and the soil profile between borings, Slope stability, Foundation settlement.
Two computed values ground-surface.js:69 in closedPts CivilCraft
```
const closedPts = (l) => (l.closed && l.pts.length > 2 && (l.pts[0].x !== l.pts[l.pts.length - 1].x || l.pts[0].y !== l.pts[l.pts.length - 1].y) ? [...l.pts, l.pts[0]] : l.pts);
```
!== in l.pts[0].x !== l.pts[l.pts.length - 1].x. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Ground surface from contour lines and points.
Two computed values ground-surface.js:69 in closedPts CivilCraft
```
const closedPts = (l) => (l.closed && l.pts.length > 2 && (l.pts[0].x !== l.pts[l.pts.length - 1].x || l.pts[0].y !== l.pts[l.pts.length - 1].y) ? [...l.pts, l.pts[0]] : l.pts);
```
!== in l.pts[0].y !== l.pts[l.pts.length - 1].y. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Ground surface from contour lines and points.
Two computed values platform.js:123 in cleanSectionLines CivilCraft
```
if (line.length < 2 || line.every((p) => p.x === line[0].x && p.y === line[0].y)) return null;
```
=== in p.x === line[0].x. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Cut and fill map, spot levels, sloped pads and free sections.
Two computed values platform.js:123 in cleanSectionLines CivilCraft
```
if (line.length < 2 || line.every((p) => p.x === line[0].x && p.y === line[0].y)) return null;
```
=== in p.y === line[0].y. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Cut and fill map, spot levels, sloped pads and free sections.
Two computed values point-edit.js:59 in checkPointEdit CivilCraft
```
if (next.n === old.n && next.x === old.x && next.y === old.y && next.z === old.z && (next.d || '') === (old.d || '')) return { ok: false, errors: {}, message: '' };
```
=== in next.x === old.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 point-edit.js:59 in checkPointEdit CivilCraft
```
if (next.n === old.n && next.x === old.x && next.y === old.y && next.z === old.z && (next.d || '') === (old.d || '')) return { ok: false, errors: {}, message: '' };
```
=== in next.y === old.y. 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 point-edit.js:59 in checkPointEdit CivilCraft
```
if (next.n === old.n && next.x === old.x && next.y === old.y && next.z === old.z && (next.d || '') === (old.d || '')) return { ok: false, errors: {}, message: '' };
```
=== in next.z === old.z. 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 point-edit.js:68 in editPoint CivilCraft
```
const moved = point.x !== old.x || point.y !== old.y || point.z !== old.z;
```
!== in point.x !== old.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 point-edit.js:68 in editPoint CivilCraft
```
const moved = point.x !== old.x || point.y !== old.y || point.z !== old.z;
```
!== in point.y !== old.y. 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 point-edit.js:68 in editPoint CivilCraft
```
const moved = point.x !== old.x || point.y !== old.y || point.z !== old.z;
```
!== in point.z !== old.z. 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 point-edit.js:74 in editPoint CivilCraft
```
if (v.x !== old.x || v.y !== old.y) continue;
```
!== in v.x !== old.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 point-edit.js:74 in editPoint CivilCraft
```
if (v.x !== old.x || v.y !== old.y) continue;
```
!== in v.y !== old.y. 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/objects-write.js:659 in insertScale 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/objects-write.js:659 in insertScale 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 stroke-clean.js:143 in cleanStroke MarkupCraft
```
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. Not in the register.
Two computed values addons/flow/lib/sim.js:52 in less ModelCraft
```
less(x, y) { return x.t < y.t || (x.t === y.t && (x.p < y.p || (x.p === y.p && x.s < y.s))); }
```
=== in x.t === y.t. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Material flow simulation.
Two computed values anim/curves-ui.js:255 in pickKeys ModelCraft
```
for (const s of sel) { if (!/^p\d+$/.test(String(s.track))) continue; const tr = a.props?.[+s.track.slice(1)]; const i = tr ? tr.keys.findIndex((k) => k.t === s.t) : -1; if (i >= 0) for (let c = 0; c 
```
=== in k.t === s.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 anim/rig-view.js:190 in hitAt ModelCraft
```
if (!this.S || this.S.m !== m || (!this.stroke && (this.S.topo !== m.topo || this.S.v !== m.v))) { this.S = new Sculptor(m); this.S.v = m.v; }
```
!== in this.S.v !== m.v. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Bone frames and pose matrices.
Two computed values earcut.js:161 in findHoleBridge ModelCraft
```
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. Not in the register.
Two computed values earcut.js:179 in findHoleBridge ModelCraft
```
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. Not in the register.
Two computed values earcut.js:194 in getLeftmost ModelCraft
```
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. Not in the register.
Two computed values earcut.js:217 in equals ModelCraft
```
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. Not in the register.
Two computed values earcut.js:217 in equals ModelCraft
```
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. Not in the register.
Two computed values earcut.js:247 in middleInside ModelCraft
```
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. Not in the register.
Two computed values io/3dm/earcut.js:162 in findHoleBridge ModelCraft
```
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. Not in the register.
Two computed values io/3dm/earcut.js:180 in findHoleBridge ModelCraft
```
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. Not in the register.
Two computed values io/3dm/earcut.js:195 in getLeftmost ModelCraft
```
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. Not in the register.
Two computed values io/3dm/earcut.js:218 in equals ModelCraft
```
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. Not in the register.
Two computed values io/3dm/earcut.js:218 in equals ModelCraft
```
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. Not in the register.
Two computed values io/3dm/earcut.js:248 in middleInside ModelCraft
```
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. Not in the register.
Two computed values mesh/ops.js:920 in slideRails ModelCraft
```
out.set(v, { a: dirs[0].w, b: dirs[dirs.length - 1].w === dirs[0].w ? -1 : dirs[dirs.length - 1].w });
```
=== in dirs[dirs.length - 1].w === dirs[0].w. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Proportional editing weights and edge creases, Inset, bevel and moves along normals, Subdivide, loop cut, bisect, knife and grid fill, Merge, spin, bridge, slide and smooth.
Two computed values mesh/pick.js:23 in fresh ModelCraft
```
fresh() { return this.v === this.mesh.v && this.nh === this.mesh.nh; }
```
=== in this.v === this.mesh.v. 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 mesh/sculpt-tool.js:33 in sculptor ModelCraft
```
if (!this.S || this.S.m !== m || (!this.stroke && (this.S.topo !== m.topo || this.S.liveTopo !== m.liveTopo || this.S.v !== m.v))) { this.S = new Sculptor(m); this.S.v = m.v; }
```
!== in this.S.v !== m.v. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Sculpt brushes.
Two computed values model.js:137 in meshGeometry ModelCraft
```
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. Not in the register.
Two computed values model.js:538 in addEdge ModelCraft
```
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. Not in the register.
Two computed values modelcraft.js:918 in init ModelCraft
```
if (c.x !== pinch.c.x || c.y !== pinch.c.y) cam[move](c.x - pinch.c.x, c.y - pinch.c.y, pinch.pivot);
```
!== in c.x !== pinch.c.x. Compare within a documented epsilon scaled to the size of the geometry, or restructure so one side is exact. Reviewed: Entity info: volume, size, angle and area, Edits and settings from the main window.