feat(core): Add cbqc named export

This exports the constant `0.55342686` which is the value to best
approximate a (quarter) circle with a cubic Bézier curve.

See: https://spencermortensen.com/articles/bezier-circle/

CHANGELOG.md

@@ -136,6 +136,7 @@
 #### Added
 
  - Allow plugins to provide their own packing implementation
+ - Added named export `cbqc` which exports the constant to approximate a circle with Cubic Bézier curves
 
 #### Fixed
 

config/changelog.yaml

@@ -2,6 +2,7 @@ Unreleased:
   Added:
     core:
       - Allow plugins to provide their own packing implementation
+      - Added named export `cbqc` which exports the constant to approximate a circle with Cubic Bézier curves
     plugin-bin-pack:
       - First release of the plugin providing the default packing implementation
     plugin-ringsector:

packages/core/src/index.mjs

@@ -15,6 +15,7 @@ import {
   beamsIntersect,
   beamIntersectsCurve,
   capitalize,
+  cbqc,
   circlesIntersect,
   curveEdge,
   curveIntersectsX,
@@ -62,6 +63,7 @@ export {
   beamsIntersect,
   beamIntersectsCurve,
   capitalize,
+  cbqc,
   circlesIntersect,
   curveEdge,
   curveIntersectsX,

packages/core/src/utils.mjs

@@ -2,8 +2,18 @@ import { Bezier } from 'bezier-js'
 import { Path } from './path.mjs'
 import { Point } from './point.mjs'
 
+/*
+ * See: https://en.wikipedia.org/wiki/Golden_ratio
+ */
 export const goldenRatio = 1.618034
 
+/*
+ * cbqc = Cubic Bezier Quarter Circle
+ * The value to best approximate a (quarter) circle with cubic Bézier curves
+ * See: https://spencermortensen.com/articles/bezier-circle/
+ */
+export const cbqc = 0.55191502449351
+
 //////////////////////////////////////////////
 //            PUBLIC  METHODS               //
 //////////////////////////////////////////////