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Animated booleans...
show user profile  graphix72
I have to do a short logo animation for a company, pretty much 2D work. I'm using Max with the top view for this.

There are two circles that intersect, they are sort of like old chinese coins with a square hole in the middle. I will make them roll together and intersect, and then have the logo fade up. Fairly easy.

However, when the coins intersect, their intersection is a different colour. One coin is red and the other is orange, but the intersection is yellow. See the picture below:

So I was thinking about doing this somehow with animated booleans. I want to keep both coins minus their intersection, and I want to keep the intersection, and paint it yellow. I'm using Max 2009 so I do have the Pro Booleans, but I'm not having much luck with the settings. Could you please give me a few pointers to get this done? Much appreciated.

[EDIT] This is what it looks like in the perspective view in Max:

read 649 times
6/20/2010 4:44:09 PM (last edit: 6/20/2010 4:48:13 PM)
show user profile  Pil
Do you really need to do this in 3D?

read 630 times
6/20/2010 5:05:44 PM (last edit: 6/20/2010 5:05:44 PM)
show user profile  graphix72
Is there a better way? I mean, Max can animate a boolean intersection, right?

read 623 times
6/20/2010 5:31:55 PM (last edit: 6/20/2010 5:31:55 PM)
show user profile  JonathanH
Literally did this in about 10 minutes in After Effects.

Made the shapes in Photoshop (could do it in AE too but PS was easier for me). Also made a version with no hole.
Animate them rolling together.
Duplicate them both, Precomp the duplicates together, open the Precomp, select both layers, Alt-click-drag the hole-less shape from the Project panel into the comp and it will replace them both (keeping their animation).
Set the track matte of whichever one's on the bottom to an Alpha Matte of the top one (this creates the boolean effect).

read 616 times
6/20/2010 6:08:28 PM (last edit: 6/20/2010 6:09:21 PM)
show user profile  graphix72
Very nice, and a nice play on words too... heheh. I don't know AfterEffects, but I guess this would be a good time to learn some of it. I have an old old version from 2005, so I'll see if it can do what you described. Thanks again, and nice job!

read 604 times
6/20/2010 6:59:14 PM (last edit: 6/20/2010 6:59:14 PM)
show user profile  Ikarah
Graphix I think if you wanna do this in 3ds max, you can make a plane over where they intersect and model it like they are over the intersection and color that plane to a brighter orange color. Right click on the plane and enable the visibility then animate the visibility from zero to 1 meaning key frame it to be zero visibility at first and then up to 1 when both circles intersect. That can give you the change in color where they intersect effect.

read 561 times
6/21/2010 10:39:37 AM (last edit: 6/21/2010 10:39:37 AM)
show user profile  gogodr
cheat and animating the operands inside the boolean do the same animation but set it to show only intersection.
color that boolean in yellow and make it go in front so it shows as the 2 coins intersect.

Hello there

beautiful ;3

read 526 times
6/21/2010 8:45:54 PM (last edit: 6/21/2010 8:45:54 PM)
show user profile  graphix72
I decided to follow the solution of JonathanH, and use AfterEffects although I have no prior experience in it. I finally acquired AfterEffects CS3 Professional (sorry for the delay, but it took me some time and today I finally installed it). I am familiar with some other Adobe products, such as Photoshop and Premiere Pro, as well as other software such as Flash and Final Cut Pro, so the interface of AfterEffects doesn't look too strange to me. But I need a little help.

I created a new Composition called "Epay Logo", for the web at 320x240 pixels. Now I need your patience and help, in telling me step-by-step what to do to create this effect. You could tell me to create elements in Photoshop and import them here, for example the coin shapes, tell me if I need to save them as something with transparency or whatever format is good. I can import all the shapes as separate layers. But please be patient and guide me step-by-step in creating this effect. I know this is Maxforums and I'm talking about AfterEffects, but I would appreciate your help.

If it's easier for you to make a short tut or video with Jing or SnaggIt, that would be great. Something I could follow. In the meantime, I'll get my feet wet with AfterEffects and try some of the tutorials.

read 495 times
6/24/2010 6:17:15 PM (last edit: 6/24/2010 6:20:04 PM)
show user profile  JonathanH
To be honest the steps I outlined in my initial post pretty much describe the whole process (you can look up terms you don't know easily enough), but when I get home tonight I'll see if I can recreate it and just upload the AE project file for you to inspect.

read 486 times
6/24/2010 7:01:24 PM (last edit: 6/24/2010 7:01:24 PM)
show user profile  graphix72
Thanks JonathanH. Much appreciate your help with this.

read 478 times
6/24/2010 8:03:33 PM (last edit: 6/24/2010 8:03:33 PM)
show user profile  JonathanH
You get a treat, project file and a Jing!

I left out the text (due to 5 minute limit) but it should be obvious how to do it with the principals this vide shows.

read 459 times
6/25/2010 1:39:08 AM (last edit: 6/25/2010 1:39:17 AM)
show user profile  graphix72
Great little tutorial, helps me very very much! Thank you for the time you spent on this. I hope others benefit from it as well. And thanks for the project file too.

read 449 times
6/25/2010 6:36:58 AM (last edit: 6/25/2010 6:58:20 AM)
show user profile  graphix72
I feel like I know AfterEffects enough now to do most of the basic things - it's curiously similar to Final Cut Pro, believe it or not. Following your example, everything seems to work fine, but I'm getting some strange artifacts / distortion in my image. Here's a grab:

This distortion was actually present in your scene as well when I scrubbed through it, and I don't know how to get rid of it. At times, I'll get the nice yellow boolean, and other times I'll get this. When I render, it comes out like this... any ideas as to what's causing the problem?

read 428 times
6/25/2010 7:13:31 PM (last edit: 6/25/2010 7:13:31 PM)
show user profile  Toen
Just thought I would give an example of how to do this in 3ds Max without booleans or compositing in another program.
There is more than one way to do this but the way I chose was by using ambient occlusion maps for each of the coins and using a similarly shaped object to act as the occluding object for each one so as it moved over the coin, the region it occluded would change color. This way the coin object can be one color where it's occluded and different color where it's not, and so when the coins are paired up correctly, it give the illusion of their intersection changing color.

Example for one coin:

Completed Animation!

read 422 times
6/25/2010 7:41:34 PM (last edit: 6/25/2010 7:41:34 PM)
show user profile  Joey Parker Jr.
Interesting Toen. I shall need to study that further(or is it farther?).
 photo 2012-sig_small3_zpsbd114b69.png

read 407 times
6/25/2010 9:49:09 PM (last edit: 6/25/2010 9:49:09 PM)
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