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tourette89 · 02-04-2012, 12:30 PM

So, I have a wheel and a course which I want it to follow. I've tried using paths and expressions but it seems they don't work together. Any ideas how to do this?

NextDesign · 02-04-2012, 06:48 PM

Your question is extremely vague. Show us what you want, and what you have, and then we can help you.

tourette89 · 04-04-2012, 09:08 AM

Sorry for the late response.

I've attached a screenshot. The path is there to show how the wheel should behave.

Ozgalis · 04-04-2012, 04:28 PM

can you do a playblast so we can see whats not acting right?

BaalRoi · 04-04-2012, 07:21 PM

I believe the best option is for you to make an animation for the wheel to go 360º around its axis (and maybe put Post-Infinity Cycle[in the graph editor]), and then animate her along the curve. For this, select the Wheel and pressing C and dragging with MMB so it will snap to the curve, and put it at the begining of the curve, then select the wheel and then the curve, (by this order, 1st wheel 2nd curve) and go to the menu Animate -> Attach to Motion Path, and open the options for it, you will need to define the up and front axis in order to the wheel go correctly.
I have to go now, but if you can do this way I believe it will work for what you want.

tourette89 · 06-04-2012, 11:55 AM

I was afraid i have to animate it myself.

First of all I when I press C and MMB nothing happens (I've had numerous problems with Maya - mental ray not visible, I lost my work in 3d space etc). And for example, an animation that I did a couple of weeks ago isn't working anymore today (when I tried to apply the same effect but to another project).

@ Ozgalis: Nothing happens. I just get errors in the lower right corner.

edit: and sorry again for the late response. the fact that easy things aren't working is making me lose interest and confidence.

BaalRoi · 08-04-2012, 10:38 PM

then just use the move tool, and then C to snap on curve, and put the wheel at the start of the curve, you will notice when you get it cause it will not let you get the wheel off the curve, then use the attach to motion path.

Jay · 09-04-2012, 12:18 PM

Key frame it from A to Z. Probably less farting about than attaching to the motion path, which can produce undesirable results sometimes.

For the rotation of the wheel, key the rotation at 360degrees, btween frames 1 and 8 and then select the animation curve for the rotation and do a post infinity cycle offset. You could then adjust the speed x the rotaton with a small expression

should work

Jay

tourette89 · 09-04-2012, 07:09 PM

Thanks. I will try this tomorrow.

02-04-2012, 12:30 PM	#1
tourette89 Registered User Join Date: Apr 2012 Posts: 4 Thanks: 0 Thanked 0 Times in 0 Posts	Wheel animation So, I have a wheel and a course which I want it to follow. I've tried using paths and expressions but it seems they don't work together. Any ideas how to do this?

02-04-2012, 06:48 PM	#2
NextDesign Technical Director Join Date: Feb 2004 Location: Toronto, Ontario, Canada Posts: 2,945 Thanks: 30 Thanked 197 Times in 173 Posts	Your question is extremely vague. Show us what you want, and what you have, and then we can help you. __________________ Imagination is more important than knowledge.

04-04-2012, 09:08 AM	#3
tourette89 Registered User Join Date: Apr 2012 Posts: 4 Thanks: 0 Thanked 0 Times in 0 Posts	Sorry for the late response. I've attached a screenshot. The path is there to show how the wheel should behave. Attached Thumbnails

09-04-2012, 12:18 PM	#8
Jay Head of Modelling at RelianceMedia VFX - London Join Date: Feb 2003 Location: UK Posts: 5,997 Thanks: 22 Thanked 127 Times in 112 Posts	Key frame it from A to Z. Probably less farting about than attaching to the motion path, which can produce undesirable results sometimes. For the rotation of the wheel, key the rotation at 360degrees, btween frames 1 and 8 and then select the animation curve for the rotation and do a post infinity cycle offset. You could then adjust the speed x the rotaton with a small expression should work Jay __________________ www.outlaws3d.com https://www.facebook.com/pages/Jay-E...71184852990983 http://jayedwards.cgsociety.org/gallery The Man in Black fled across the desert, and the Gunslinger followed....

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04-04-2012, 04:28 PM	#4
Ozgalis Registered User Join Date: Dec 2008 Location: Crystal Lake, Illinois Posts: 413 Thanks: 8 Thanked 15 Times in 11 Posts	can you do a playblast so we can see whats not acting right?

04-04-2012, 07:21 PM	#5
BaalRoi Registered User Join Date: Jan 2012 Location: Porto - Portugal Posts: 22 Thanks: 5 Thanked 2 Times in 2 Posts	I believe the best option is for you to make an animation for the wheel to go 360º around its axis (and maybe put Post-Infinity Cycle[in the graph editor]), and then animate her along the curve. For this, select the Wheel and pressing C and dragging with MMB so it will snap to the curve, and put it at the begining of the curve, then select the wheel and then the curve, (by this order, 1st wheel 2nd curve) and go to the menu Animate -> Attach to Motion Path, and open the options for it, you will need to define the up and front axis in order to the wheel go correctly. I have to go now, but if you can do this way I believe it will work for what you want.

06-04-2012, 11:55 AM	#6
tourette89 Registered User Join Date: Apr 2012 Posts: 4 Thanks: 0 Thanked 0 Times in 0 Posts	I was afraid i have to animate it myself. First of all I when I press C and MMB nothing happens (I've had numerous problems with Maya - mental ray not visible, I lost my work in 3d space etc). And for example, an animation that I did a couple of weeks ago isn't working anymore today (when I tried to apply the same effect but to another project). @ Ozgalis: Nothing happens. I just get errors in the lower right corner. edit: and sorry again for the late response. the fact that easy things aren't working is making me lose interest and confidence.

08-04-2012, 10:38 PM	#7
BaalRoi Registered User Join Date: Jan 2012 Location: Porto - Portugal Posts: 22 Thanks: 5 Thanked 2 Times in 2 Posts	then just use the move tool, and then C to snap on curve, and put the wheel at the start of the curve, you will notice when you get it cause it will not let you get the wheel off the curve, then use the attach to motion path.

09-04-2012, 07:09 PM	#9
tourette89 Registered User Join Date: Apr 2012 Posts: 4 Thanks: 0 Thanked 0 Times in 0 Posts	Thanks. I will try this tomorrow.