Notifications
Clear all
May 30, 2012 4:14 pm
Hi!
I have the following problem. I have an object and I have a spline. How can I move my object along the spline per script? It is a closed spline (ellipse) and I want to say for example that the object should take 20 steps to the origin point where it starts, or 40 steps and so on. With steps I mean frames. How can I do this? And I also want to repeat the movement about 100 times.
Respectfully,
cgneuling
5 Replies
May 30, 2012 4:14 pm
Curious why a path constraint will not work?
May 30, 2012 4:14 pm
my object follows the path. That’s no problem but how can I set the velocity of the object?
May 30, 2012 4:14 pm
and with speed I mean that I want that for example the spline is circled in 100 frames
May 30, 2012 4:14 pm
like this ?
fn get =
(
delete objects
pathspline = convertToSplineShape (ellipse length:100 width:200)
obj = convertToMesh (box length:10 width:10 height:10)
PathConstraint= path_constraint()
PathConstraint.path = pathspline
obj.position.controller = PathConstraint
if pathspline.numsplines != 1 do (print "i want a simple spline" ; return 0)
perimeter = 0.0
for seglength in getSegLengths pathspline 1 cum:false do perimeter+= seglength
velocityframe = 10.0 -- 10 unit's length per frames
timeframe = perimeter /velocityframe
timeframe as integer
)
timeframe = get() as time
May 30, 2012 4:14 pm
or something like this:
fn pathConstaintLoop node path loopTime:100 =
(
c = node.position.controller = path_constraint path:path axis:2 constantVel:on follow:on
p = c.percent.controller
enableORTs p on
setBeforeORT p #cycle
setAfterORT p #cycle
deletekeys p #allkeys
k = addnewkey p 0
k.value = 0
k = addnewkey p loopTime
k.value = 100
)
(
delete objects
animationrange = interval 0 1000
path = ellipse name:"Path" length:100 width:200 wirecolor:green
node = box name:"Node" length:10 width:10 height:10 wirecolor:yellow
pathConstaintLoop node path loopTime:100
)