Extract areas on the FPCB that do not contain arcs.(Season2)

Hello, everyone.
I am reposting this with the finalized code,
which builds upon the code shared by "Hoangkhoipcb".
Once again, I would like to thank "Hoangkhoipcb".

/*
================================================================================

*(26Y/09M/30D)
* Command   : create_arc_chk
* Function      : Checks for bent corners (sharp angles) without arcs on CLINES.
*                       Highlights detected segments and generates a report log.
*
* [How to Use]
* 1. Modified to allow checking of individual layers or all layers.
* 2. When the window appears after execution:
* 3. Select the layer you wish to check and click the OK button.
* - All_Layer : Checks clines on all layers.
* - Others     : Checks clines only on the specific layer.
* 4. Clicking the Cancel button stops the operation.
*
* Output File : create_arc_chk.log
================================================================================
*/

axlCmdRegister("create_arc_chk" 'create_arc_chk)

(defun create_arc_chk ()
(let (all_layers sel_layer clines seg_list Out_file segs seg next_seg angle pt_corner error_count)

all_layers = append(list("All_Layer") axlSubclassRoute(?field 'isEtch))
sel_layer = nth(axlUIMultipleChoice("Select a Layer" all_layers "All Etch Layer") all_layers)

when(sel_layer
if(sel_layer == "All_Layer" then
axlSetFindFilter(?enabled '("noall" "CLINES" "INVISIBLE") ?onButtons '("all"))
axlAddSelectAll()
clines = axlGetSelSet()
else
axlVisibleDesign(nil)
axlVisibleLayer(strcat("ETCH/" sel_layer) t)
axlVisibleLayer(strcat("PIN/" sel_layer) t)
axlVisibleLayer(strcat("VIA CLASS/" sel_layer) t)
axlVisibleLayer("BOARD GEOMETRY/OUTLINE" t)
axlVisibleUpdate(t)
axlSetFindFilter(?enabled '("noall" "CLINES") ?onButtons '("all"))
axlAddSelectAll()
clines = axlGetSelSet()
)

axlClearSelSet()

seg_list = nil
error_count = 0

Out_file = outfile("create_arc_chk.log" "w")

fprintf(Out_file "%-5s %-7s %-10s %s\n" "No" "Angle" "Layer" "Location")

foreach(cline clines
segs = cline->segments
while(cdr(segs)
seg = car(segs)
next_seg = cadr(segs)

/* Proceed only if both segments are straight lines */
if(seg->xy == nil && next_seg->xy == nil then

/* Find the intersection point of two consecutive line segments */
if(axlGeoPointsEqual(car(seg->startEnd) car(next_seg->startEnd)) || axlGeoPointsEqual(car(seg->startEnd) cadr(next_seg->startEnd)) then
pt_corner = car(seg->startEnd)
else
pt_corner = cadr(seg->startEnd)
)

angle = abs(axlRadToDeg(axlGeoAngleBetweenLines(seg->startEnd next_seg->startEnd)))

if(!axlGeoEqual(angle 0.0) && !axlGeoEqual(angle 180.0) then
error_count = error_count + 1

fprintf(Out_file "%-5d %-7.2f %-10s %L\n" error_count angle cadr(parseString(seg->layer "/")) pt_corner)

seg_list = cons(seg seg_list)
seg_list = cons(next_seg seg_list)
)
)
segs = cdr(segs)
)
)
close(Out_file)

if(error_count > 0 then
axlHighlightObject(seg_list)
axlUIViewFileCreate("create_arc_chk.log" "Arc Segments Check" nil)
printf("### Errors : %d ###\n" error_count)
else
printf("### No arc-less corners found. ###\n")
)
)
)
)