Arguments

tinEname  (ename or vla-object)  the TinSurface entity
points  (list of 2d/3d point list)  the point to be projected onto the TinSurface, as polygon sequence(s)
cropType  (integer, bcTinRemoveBreaklines 0, bcTinLeaveBreaklines 1) mode to handle the BreakLines (if any are present)

Return

T or NIL, indicating success or failure

Example

(tin:crop tin '((10 80 5) (50 50 10) (10 10 2) (80 20 7)) bcTinLeaveBreaklines)  T

Remarks

each point in "points" must match a definition points of the TinSurface;
for "cropType", see ECropType in Type Constants