Notifications
Clear all
Sep 05, 2018 3:20 pm
I’m creating several closed splines from 3rd party coordinates, some of them with bezier points. Some of the data is “bad” as the curves cause self-intersection. In that case “convertToPoly” works but nothing is shown.
I need some way of knowing that the spline is problematic.
The “Shape Check” utility picks it up but it doesn’t seem scriptable.
I’m a MaxScript beginner, What could I check on the converted poly?
3 Replies
Sep 05, 2018 3:20 pm
Check the count of the faces. For example:
(
spl = $Shape001
splAsPolyObj = convertToPoly spl
if splAsPolyObj.numfaces != 0 then
print "GOOD"
else
print "BAD"
)
Sep 05, 2018 3:20 pm
Thank you! Just what I was looking for.
Sep 05, 2018 3:20 pm
you can also use sdk methods to check for spline self-intersections and its intersections with other splines
(
g = (dotNetClass "Autodesk.Max.GlobalInterface").Instance
inode = g.coreinterface7.getinodebyhandle $.inode.handle
shp = ((inode.EvalWorldState (int currenttime) true).obj).shape_
splines = for i=0 to shp.SplineCount-1 collect shp.GetSpline i
-- showmethods splines[1]
-- show splines[1]
for i=1 to splines.count do
(
format "Spline % is self-intersecting: %
" i (splines[i].SelfIntersects)
for j=i+1 to splines.count where splines[i].IntersectsSpline splines[j] do
(
format "Spline % intersects spline %
" i j
)
)
)