Arguments

tinEname  (ename or vla-object)  the TinSurface entity to query
elevation  (number)  the Z value to get the contour polygon(s) for

Return

(list of 3D point lists)  the list of contour polygons of the TinSurface entity for the specified elevation height, or NIL

Example

(tin:getContoursAtElevation tin 3.5)
(((71.25 56.25 3.5) (65.0 50.0 3.5) (54.0625 54.0625 3.5) (52.1875 57.8125 3.5) (67.8571428571429 60.7142857142857 3.5)) ((31.0 13.0 3.5) (15.625 15.625 3.5) (10.0 45.0 3.5)))

Remarks