Create edge box

! create a box to enclose all of the selected edges
! -------------------------------------------------

get_selected_solid_list	! get list of selected solids
num_solids = number_of_solids
if num_solids<1 then stop "Please select at least 1 edge"
xmin = 9999
ymin = 9999
zmin = 9999
xmax = -9999
ymax = -9999
zmax = -9999

for i=1 to num_solids

sol_ref = next_solid_ref

get_solid_selected_edge_list sol_ref

num_edges = number_of_edges

for j=1 to num_edges

edge_ref = next_edge_ref

! get the extents of the edge

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

get_edge_extents sol_ref, edge_ref, x1, y1, z1, x2, y2, z2

! compare with current min and max

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

if x1 < xmin then xmin = x1

if y1 < ymin then ymin = y1

if z1 < zmin then zmin = z1

if x2 > xmax then xmax = x2

if y2 > ymax then ymax = y2

if z2 > zmax then zmax = z2

next j

next i

contour_3d [

start xmin, ymin, zmin

line xmax, ymin, zmin

line xmax, ymax, zmin

line xmin, ymax, zmin

line xmin, ymin, zmin

]

contour_3d [

start xmin, ymin, zmax

line xmax, ymin, zmax

line xmax, ymax, zmax

line xmin, ymax, zmax

line xmin, ymin, zmax

]

contour_3d [

start xmin, ymin, zmin

line xmin, ymin, zmax

]

contour_3d [

start xmax, ymin, zmin

line xmax, ymin, zmax

]

contour_3d [

start xmax, ymax, zmin

line xmax, ymax, zmax

]

contour_3d [

start xmin, ymax, zmin

line xmin, ymax, zmax

]

redraw