Modify op path2

args opnum, dist
local numfeat, ifeat, itype
local xs, ys, zs, xe, ye, ze, xc, yc, zc, rad, idir
local x1, y1, z1, x2, y2, z2, ang1, ang2, ang3
! get a copy of the current op path
! ---------------------------------
get_op_num_feat opnum, numfeat	! get the number of features
if numfeat<1 then goto done	! make sure there is at least 1
define_path_list 1	! create path list
select_op_path_type main	! select the main path
get_op_path opnum get a copy of the op path
! this will be path zero
get_op_path_start opnum, xs, ys, zs
create_path 1, xs, ys, zs	! start a new path
! divide it up
! ------------
for ifeat=1 to numfeat

get_op_feat_type opnum, ifeat, itype

progress_set (ifeat / numfeat)

if itype = feat_type_line then goto edit_line

if itype = feat_type_arc then goto edit_arc

	! not a line or arc, just use this feature as it is

add_path_feat 1, 0, ifeat                             ! copy this feat to the new path

continue

:edit_line

get_op_feat_start opnum, ifeat, xs, ys, zs

get_op_feat_end opnum, ifeat, xe, ye, ze

get_op_feat_angles opnum, ifeat, ang1, ang2, ang3

x1 = xs + ((xe - xs) / 2)

y1 = ys + ((ye - ys) / 2)

z1 = zs + ((ze - zs) / 2)

ang2 = ang1 + 90

x2 = x1 + dist * cos(ang2)

y2 = y1 + dist * sin(ang2)

z2 = z1

add_path_line 1, x1, y1, z1                         ! mid way along the feature

add_path_line 1, x2, y2, z2                         ! out by the given distance

add_path_line 1, x1, y1, z1                         ! back to mid point

add_path_line 1, xe, ye, ze                         ! end of original features

continue

:edit_arc

get_op_feat_start opnum, ifeat, xs, ys, zs

get_op_feat_end opnum, ifeat, xe, ye, ze

get_op_feat_angles opnum, ifeat, ang1, ang2, ang3

get_op_feat_arc_data opnum, ifeat, rad, idir, xc, yc, zc

if idir=1 then ang3 = -ang3

ang1 = ang1 + (ang3 / 2)                             ! angle mid way around arc

if ang1>360 then ang1 = ang1 - 360

if ang1<0 then ang1 = ang1 + 360

ang2 = ang1

if idir=0 then ang2 = ang1 + 180

if ang2 > 360 then ang2 = ang2 - 360

x1 = xc + rad * cos(ang1)

y1 = yc + rad * sin(ang1)

z1 = zs + ((ze - zs) / 2)

x2 = x1 + dist * cos(ang2)

y2 = y1 + dist * sin(ang2)

z2 = z1

if idir=1 then add_path_arc 1, x1, y1, z1, xc, yc, zc, rad, cw

if idir#1 then add_path_arc 1, x1, y1, z1, xc, yc, zc, rad, ccw

add_path_line 1, x2, y2, z2                         ! out by the given distance

add_path_line 1, x1, y1, z1                         ! back to mid point

if idir=1 then add_path_arc 1, xe, ye, ze, xc, yc, zc, rad, cw

if idir#1 then add_path_arc 1, xe, ye, ze, xc, yc, zc, rad, ccw

next ifeat

! end of path

! -----------

copy_path 1, 0                                                 ! copy the new path to path zero

set_op_path opnum                                          ! set the op path to use path zero

delete_path_list                                                ! delete the list of paths

:done