About Us

Fade · 19-11-2003, 09:38 PM

I have an object moving along a curvy motion path, this object is made up of a load of different objects all parented to one main one, the parent object is set to align to the motionpath, so in turn everything else does.

What I'd like to do though is have some of the objects align to the direction of the motion path a few frames before the main parent does, not leave the motion path, just align to the direction coming up. Is this possible? If so, how?

Kvaalen · 19-11-2003, 10:25 PM

You can do this with expressions.
Create an expression that reads the rotation of the main object a couple frames ahead (Frame+number of frames).
Apply this expression to the other objects and that is it.

Fade · 19-11-2003, 10:33 PM

Well that'd be great if I knew how to make expressions

I have no idea of the syntax etc.

Fade · 19-11-2003, 10:45 PM

What i need it for is this.. I have a car driving down a road and it takes a corner, i want the wheels to align with the rotation of the main body of the car as it takes the corner. I set up a set driven key for this and it worked well enough...

Until that is I turned the car by more than 90 degrees which resulted in the wheels turning abnormally far, and eventually facing sideways, or rotating completely around.

what would be better is if I could have the wheels rotate as the car rotates using a set driven key, but somehow also limit them so that they can't rotate more than 90 degrees in either direction.

Mark · 20-11-2003, 05:35 AM

Can you just not set rotation limits in the object's item motions panel?

Fade · 20-11-2003, 12:05 PM

Yeah I tried that but it doesn't seem to work if the object is being driven by another object's rotation. If I set limits and move the object without using the set driven key then the limits do work, but then i'd need to keyframe everything manually, its ok now though as I think i've located a plugin which does what i'm looking for. Thanks

Incidentally, i'm still pretty newish to the whole forum idea, how do you guys get the little images next to your name on your posts? (I hope i'm not going to kick myself for the answer to this...)

Mark · 20-11-2003, 02:13 PM

To get the Avatar set up, you need to go into your User control panel (The User/CP button from the forum root). Then, click on 'Edit Options'. Down the bottom of this panel, you'll see the options to set the avatar image.

Hope this helps..

Fade · 20-11-2003, 02:17 PM

Cheers

19-11-2003, 09:38 PM	#1
Fade Full Access Member Join Date: Oct 2003 Location: Scotland Posts: 113	Motion Path Question I have an object moving along a curvy motion path, this object is made up of a load of different objects all parented to one main one, the parent object is set to align to the motionpath, so in turn everything else does. What I'd like to do though is have some of the objects align to the direction of the motion path a few frames before the main parent does, not leave the motion path, just align to the direction coming up. Is this possible? If so, how?

19-11-2003, 10:25 PM	#2
Kvaalen Full Access Member Join Date: Jan 2003 Location: Paris Posts: 536	You can do this with expressions. Create an expression that reads the rotation of the main object a couple frames ahead (Frame+number of frames). Apply this expression to the other objects and that is it. __________________ My Site!

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Google Motion	David	Members Lounge	0	01-04-2011 11:24 AM
Motion Capture	sspikedudley	Animation	0	24-08-2004 06:43 AM
HyperVoxels Motion Question	kennez	Rendering, Lighting, Texturing and Effects	1	25-02-2004 12:40 PM
Motion Mixer	koots	LightWave Basics	2	01-09-2003 04:18 AM
Camera on path	prodigouz	Animation	0	31-05-2003 04:10 PM

About Us

Beginner Training

Connect with

Need help? Email us

Popular Tutorials

Learning Paths

Useful Links

19-11-2003, 10:33 PM	#3
Fade Full Access Member Join Date: Oct 2003 Location: Scotland Posts: 113	Well that'd be great if I knew how to make expressions I have no idea of the syntax etc.

19-11-2003, 10:45 PM	#4
Fade Full Access Member Join Date: Oct 2003 Location: Scotland Posts: 113	What i need it for is this.. I have a car driving down a road and it takes a corner, i want the wheels to align with the rotation of the main body of the car as it takes the corner. I set up a set driven key for this and it worked well enough... Until that is I turned the car by more than 90 degrees which resulted in the wheels turning abnormally far, and eventually facing sideways, or rotating completely around. what would be better is if I could have the wheels rotate as the car rotates using a set driven key, but somehow also limit them so that they can't rotate more than 90 degrees in either direction.

20-11-2003, 05:35 AM	#5
Mark Super Moderator Join Date: Jan 2003 Location: Sunbury, UK Posts: 2,339	Can you just not set rotation limits in the object's item motions panel?

20-11-2003, 12:05 PM	#6
Fade Full Access Member Join Date: Oct 2003 Location: Scotland Posts: 113	Yeah I tried that but it doesn't seem to work if the object is being driven by another object's rotation. If I set limits and move the object without using the set driven key then the limits do work, but then i'd need to keyframe everything manually, its ok now though as I think i've located a plugin which does what i'm looking for. Thanks Incidentally, i'm still pretty newish to the whole forum idea, how do you guys get the little images next to your name on your posts? (I hope i'm not going to kick myself for the answer to this...)

20-11-2003, 02:13 PM	#7
Mark Super Moderator Join Date: Jan 2003 Location: Sunbury, UK Posts: 2,339	To get the Avatar set up, you need to go into your User control panel (The User/CP button from the forum root). Then, click on 'Edit Options'. Down the bottom of this panel, you'll see the options to set the avatar image. Hope this helps..

20-11-2003, 02:17 PM	#8
Fade Full Access Member Join Date: Oct 2003 Location: Scotland Posts: 113	Cheers