SimplyMaya Forums

Welcome to the forum, feel free to ask questions here.

SM Forums / Maya Questions / Maya Technical Issues / How to set a constant speed along one axis of an object following curve

Maya Technical Issues Post all your interface and configuration related problems with Maya software here.

Join the conversation. Reply to post
Thread Tools
24-06-2020, 10:40 AM   #1
Registered User
Join Date: May 2020
Posts: 1
How to set a constant speed along one axis of an object following curve
I need to borrow someone's brain please!

Short version of the question:

How can you set a constant speed along one axis of an object following curve?

Longer version of the question:

Im trying to make heart monitor ECG / ECG graph.

Those monitors where a dot travels from left to right and draws the heart rhythm.

So I created the curve in Maya by tracing an existing image. That went well.

I created a small sphere to represent the dot and attached it to the curve as a motion path. That went well too.

The problem I have is that in real heart monitors the dots travels from left to right at a constant speed. It does not slow down as it draws a spike.

When travelling along the Z axis, my dot travels at a constant speed along the curve, but not a constant speed along Z, so it slows as it draws the spikes. So it looks wrong.

I've tried baking the simulation and going into the Graph Editor and equalise the the motion along Translate Z, but then the sphere no longer follows the original graph / curve.

How can I get the sphere to follow the motion path perfectly, but maintain a constant speed along the Z axis?

I uploaded this animated GIF but it has been converted to a static JPEG for some reason!
Attached Thumbnails
Click image for larger version

Name:	ECG graph.jpg
Views:	6
Size:	47.7 KB
ID:	58028  

Last edited by Unset; 24-06-2020 at 02:15 PM.
  Reply with quote

axis , graph editor , speed

Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
make selected object visible or invisible in outliner yiingrou Maya Technical Issues 0 19-05-2020 05:29 AM
Making an object appear along an axis marioepsley Animation 5 12-01-2011 06:32 PM
Scale components along an axis?!?!?! ctbram Maya Basics & Newbie Lounge 2 01-01-2010 06:08 PM
Set Driven Key: problem with two attributes driving a single object JulianBT Animation 4 31-12-2003 02:12 PM
dynamic wires grunze Dynamics & Special Effects 3 16-12-2003 11:41 PM