quickLength Method

Return an approximate (but easy to compute) arc length. The estimate is:

• Form 8 chords on full circle, proportionally fewer for partials (but 2 extras if less than half circle).
• Sum the chord lengths.
• For a circle, we know this crude approximation has to be increased by a factor (theta/(2*sin(theta/2))).
• Apply that factor.
• Experiments confirm that this is within 3 percent for a variety of eccentricities and arc sweeps.

quickLength(): number

Returns - number

Defined in

• curve/Arc3d.ts Line 760