Re: animateMotion - specifying a start position along a path that is not the beginning of the path

Allied tests and examples are discussed in the SVG Primer at - 
- follow down to the examples on "following paths". If resolution to such 
issues is found, let me know and I'll try to include links to such from 

There is also the related thread associated with this example:, emanating from the 
thread at , 
that has also been discussed a bit here, in relationship to adding pairwise 
over-under data to subpaths.

----- Original Message ----- 
From: "Ryan Arnold" <>
To: <>
Sent: Friday, December 10, 2010 6:38 PM
Subject: animateMotion - specifying a start position along a path that is 
not the beginning of the path


Erik Dahlström asked me to email this mailing list regarding a
potential deficiency with animateMotion.

I'm tinkering with a train engine + couplings + cars following a track
(path) demo:

This appears to do what I want but there's a gross hack in it.  It
abuses animateMotions's begin="" feature to add new cars and couplings
to the path behind the engine after the previous engine or car has
passed by the start of the path.

This hack is not programmatically scalable.  Changing the
animateMotion duration to 10s, for example, will result in incorrectly
spaced cars.  I can't even figure out how to determine the begin=""
values for each element.  In my current example they were specified

What I want is to be able to programatically place cars on the path
one after the other and then have them all begin their animated motion
at the same time.  It'd be nice if negative offsets worked with closed

I also want to be able to start the chain of cars' motion at an
arbitrary place on the track.  There doesn't seem to be a way to do
this.  I notice that textpath has a startOffset.  Is there a reason
something like this couldn't work for paths?

Any ideas?

Ryan S. Arnold

Received on Saturday, 11 December 2010 20:56:42 UTC