Arguments

ename  (ename)  the TinSurface entity to query
constraint  (integer or ename)  the constraint to be queried

Return

(double)  the mid-ordinate-distance value, or NIL

Example

(tinc:getmidordinatedistance tin constraint)  0.05

Remarks

the mid-ordinate distance is the distance of the curve's midpoint, to the arc center; similar to arc's bulge; used as a kind of tolerance;
this curve rasterisation/smoothing tolerance only applies to curve-based constraints;
default value is 0.0, which means automatic tolerance chosen by the TinSurface implementation;
for more informations : https://civil3dplus.wordpress.com/2012/12/23/surfaces-and-the-mid-ordinate-distance/