SimplyMaya Forums

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

Register FAQ Members List Calendar Mark Forums Read

New Thread
 
Thread Tools
Old 10-08-2003, 10:25 PM   #1
paki
Registered User
 
Join Date: Jul 2003
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Question making streaks behind moving objects

say i wanted to animate a sphere and as it moved a blue streak would appear behind it in the path that it travelled. but would only appear when the sphere moves and would dissappear at a rate i could set.. how would i go about doing something like that?



im trying out
particles -> emit from object

but i cant get the particles to show up in a render, am i doing this correctly or should igo about this some other way?


some screens:

http://free.hostrocket.com/~pakihos/01.gif
http://free.hostrocket.com/~pakihos/02.gif
paki is offline   Reply With Quote
Old 11-08-2003, 03:44 PM   #2
ragecgi
Super Moderator
 
ragecgi's Avatar
 
Join Date: Sep 2002
Location: Minnesota, USA
Posts: 3,709
Thanks: 0
Thanked 13 Times in 12 Posts
Default

Not sure if you had a chance to take a look at it, but in my Dynamic Explosions VIP vids, I talk about a way to do this using Paint Effects.

Very Simply,
1. you draw a path curve on the path that you want this to happen.
NOTE, start your path at the point that you want the effect to begin, otherwise, you will have to do it over

2. Then, all you have to do is create a Brush with your desired "trail" settings. (i.e. look, color, etc.)
NOTE: there are MANY default brushes to choose from that you can alter to suit most shots (such as, blue paint, tire treads, fire, smoke, etc. ...even water & water falls)

3. Then, select your curve, THEN select your brush, and in the PaintEffects menu at the top (in the Rendering menu set),
choose:
PAINT EFFECTS > CURVE UTILITIES > ATTACH BRUSH TO CURVE.

and whala!!

The curve will take on the length and shape of your curve without having to paint in the viewport at all

Now, to animate the "Painting" or effect, all you do is key the "MIN and MAX CLIP attributes in your stroke to animate the "effect" from one end of the curve, to the other

Good luck!

PS, in my tut, this is one way that I show how to do missle trails
__________________
Israel "Izzy" Long
Motion and Title Design for Broadcast-Film-DS
izzylong.com
ragecgi is offline   Reply With Quote
Old 11-08-2003, 08:47 PM   #3
paki
Registered User
 
Join Date: Jul 2003
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Default

wow that worked out quite nicely, the neon paintbrush was just wat i needed too =)

only thing is you lost me on the animation part, im pretty new to maya and dind't understand what you meant by "key the MIN and MAX CLIP attributes in your stroke to animate the.."
i mean i can do like a basic animation of a sphere moving across a plane using key frames, but ya lost me.. do you think you could explain that a bit more pleaSE?
paki is offline   Reply With Quote
Old 11-08-2003, 10:10 PM   #4
ragecgi
Super Moderator
 
ragecgi's Avatar
 
Join Date: Sep 2002
Location: Minnesota, USA
Posts: 3,709
Thanks: 0
Thanked 13 Times in 12 Posts
Default

Sure

Assuming you were able to create your basic path curve, and attach your PFX brush to it, in order to make it look like it is being "drawn" or animated from one end to the other:

1. Select your brush on the Outliner or hypergraph.
(whichever you use. I use the outliner because I'm more comfortable with it)

2. Now, to see the attributes of any selected object, there are 2 methods you can use: the "channel box" or the "Attribute Editor".

-The Channel Box appears in the Maya window only if you choose to display it. It appears to the right of the workspace.
NOTE: You can display either the Channel Box or the Attribute Editor in the main Maya window, but not both at the same time.
If it is not there, go to:
Display > UI Elements > Channel Box/Layer Editor

-To display the Attribute editor window, simply select your object and on your keyboard, hit: CTRL+A

3. Once you have accessed the attributes of your selected brush, look for the MIN and MAX CLIP attributes.

4. Now you can key these attributes just like any other object.

- Render a test frame to see what the full brush looks like, then:

- change one of the clip values, then render another frame to see how these new attribute values make the brush stroke look as if it is getting shorter, or longer. (depending on which attribute you chose to play with)
One value controls clip from one end, while the other value controls clip from the other end

- to key an attribute, simply place your mouse pointer over the value box, then right-click and choose KEY SELECTED.

- then go to another frame in your frame range, and change the value(s) to whatever you need, and key it again.

- rewind the timeline and watch as the brush stroke gets longer or shorter over time, depending on how you messed with the values

Good luck!
__________________
Israel "Izzy" Long
Motion and Title Design for Broadcast-Film-DS
izzylong.com
ragecgi is offline   Reply With Quote
Old 12-08-2003, 01:14 AM   #5
paki
Registered User
 
Join Date: Jul 2003
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Default

hmm i did that and all and when i view the animation it does look like something is moving, but the entire curve is still visible throughout the entire thing. ive attached the file, do you think you could take a look? you dont have to fix it and send it back or anything, maybe just point out wat im doing wrong?
Attached Files
File Type: mb streaktest.mb (48.0 KB, 21 views)
paki is offline   Reply With Quote
Old 12-08-2003, 01:18 AM   #6
ragecgi
Super Moderator
 
ragecgi's Avatar
 
Join Date: Sep 2002
Location: Minnesota, USA
Posts: 3,709
Thanks: 0
Thanked 13 Times in 12 Posts
Default

Getting Maya re-installed on my box tonight, so it might take a day or two.

Cool?

I WILL get to it however
__________________
Israel "Izzy" Long
Motion and Title Design for Broadcast-Film-DS
izzylong.com
ragecgi is offline   Reply With Quote
Old 12-08-2003, 02:06 AM   #7
paki
Registered User
 
Join Date: Jul 2003
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Default

thanks a lot rage =)
paki is offline   Reply With Quote
Old 12-08-2003, 02:07 AM   #8
ragecgi
Super Moderator
 
ragecgi's Avatar
 
Join Date: Sep 2002
Location: Minnesota, USA
Posts: 3,709
Thanks: 0
Thanked 13 Times in 12 Posts
Default

No problem, and sorry fo the delay
__________________
Israel "Izzy" Long
Motion and Title Design for Broadcast-Film-DS
izzylong.com
ragecgi is offline   Reply With Quote
Old 20-08-2003, 08:30 AM   #9
paki
Registered User
 
Join Date: Jul 2003
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Default

hey i got it.. i think

my timing is a bit off on the streaks so it doesnt look that good yet
and i didnt start the max clip at 0 (you'll see what i mean)

ive attached the file if anyone wants to take a look (sorry i made the resolution so big.. im just a nut, but the overall file size is small because the video is like 50frames long)

if anyone wants to give me suggestions or anything, it would be much appreciated
Attached Files
File Type: rar test.rar (106.3 KB, 22 views)
paki is offline   Reply With Quote
New Thread

« Previous Thread | Next Thread »

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Problem solving many dynamic objects in a pile? rohiniduggal Dynamics & Special Effects 3 14-01-2011 07:26 PM
Strange Problem - Unable to change attributes for multiple objects anthonysw3 Technical Issues 4 04-12-2010 11:56 PM

1 Month

$34

Month-to-month billing
$34/month
Unlimited access to all videos
Project files to download
Easy to cancel at anytime
 
 

3 months

$87

Billing every 3 months
$29/month
Unlimited access to all videos
Project files to download
Easy to cancel at anytime
Save $5 per month or $15 in total compared to monthly billing with this package.

12 months

$288

Billing every 12 months
$24/month
Unlimited access to all videos
Project files to download
Easy to cancel at anytime
Save $10 per month or $120 in total compared to monthly billing with this package.

Your plan will automatically renew. You can cancel at any time via your PayPal account to avoid being charged again.

You can view the FAQ on our video plans here. You can contact us directly here. By clicking one of the buttons above, you agree to our Terms and Privacy Policy.