CheckZeroLengthSegments.scr
When creating objects in ECOTECT, quite a few people seem to click twice on the same vertex or join up a closed planar object that is already closed, despite warning dialog boxes that appear in each case. This results in a line segment with each vertex in exactly the same segment, hence zero length. ECOTECT itself is tolerant of such constructions but other third-party tools that you export to may not be.
This script searches through all visible objects in the model and selects those objects that contain zero-length line segments.
Script Contents (Lang: lua)
--[[----------------------------------------------
-- CHECK FOR ZERO LENGTH LINE SEGMENTS:
-- This script searches for line segments with
-- zero length (ie: two vertexes in exactly the
-- same position) and selects any object(s) that
-- contain them.
--]]-----------------------------------------------
-- Get number of selected objects.
objects = get("model.objects")
-- Display 3D EDITOR page,
set("app.page", 1)
-- Make sure nothing is selected.
cmd("select.none")
-- Cycle through selected objects.
for o = 0, objects do
selected = false
nodes = get("object.nodes", o)
zone = get("object.zone", o)
-- Only consider visible objects.
if (nodes > 0) and (get("zone.off", zone) <= 0)
and (get("zone.hidden", zone) <= 0) then
-- Fills x1, y1 and z1 with coordinates.
x1, y1, z1 = get("object.node.position", o, 0)
-- Cycle rest of nodes
for n = 1, nodes do
-- Fills x2, y2 and z2 with coordinates.
x2, y2, z2 = get("object.node.position", o, n)
-- Use ECOTECT to calculate the distance.
dist = get("model.distance", x1, y1, z1, x2, y2, z2)
-- If less than 1mm, select it.
if dist < 1e-3 then
selected = true
end
-- Shuffle coordinates along one.
x1 = x2
y1 = y2
z1 = z2
end
-- Set the selection state of the object.
set("object.selected", o, selected)
end
end
-- Update the view to show
-- any newly selected objects.
cmd("view.redraw")
