curve.closestPointLength(point [, opt])
Return the length of the curve up to the point that lies closest to
The function uses the same algorithm as the
curve.closestPointT() function. The length of the curve at
t closest to
point is returned.
The default value for
opt.precision is 3; this corresponds to maximum observed error of 0.1%.
opt.subdivisions property may be specified, directly providing an array of pre-computed curve subdivisions with which to begin the algorithm. Use the
curve.getSubdivisions() function to obtain an array of curve subdivisions. The
opt.precision property is still necessary, however; it determines the precision of the point search algorithm.