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Morphing a hand and a pen

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jos willem
Morphing a hand and a pen
on May 2, 2008 at 8:01:36 am

Hi there,

I am trying to morph a hand holding a pen. I want to morph the hand from shot a to shot b (but you can't see the morph. That is good)

And I want to morph the pen from shot a (pen1 black) to shot b (pen2 withe) But I want to start with the morph at the top of the pen. How do I do that? Now the whole pen is morphing at the same time.

Who can help me?

http://www.buurtsteunpunt.nl/still_morph.jpg


Thx


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Pierre Jasmin
Re: Morphing a hand and a pen
on May 2, 2008 at 6:47:23 pm


Often in RE:Flex you can set Boundary shapes ( a from and to shape - where pixels outside shape won't move)

I only see one frame but you probably need to make this somehow in two or maybe 3 layers.

Seeing only one frame it looks like to try to make a boundary shape that protects the pen until the edge of the black gradient as one of the layer might work (so a closed shape that outline the pen). Then you make another morph that use as boundary a shape that goes around the finger and the thumb and catches the pen

http://www.revisioneffects.com/bugreports/layered_morph.jpg
pen boundary shape in green

If that does not work, sometimes you need to make clean cut outs to morph, and sometimes if the top deformation leaves some small holes when you recomposite all, RE:Fill is your friend.

Pierre






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jos willem
Re: Morphing a hand and a pen
on May 2, 2008 at 9:57:45 pm

Hi Pierre,

First of al thanx for your help! But I still can't sort it out. I created a small animation to show you what I mean (this is 1 frame of the story board and the only visual about the morph)
http://www.buurtsteunpunt.nl/explanation_video.mpg

What I have is
video A, a hand writing with a black pencil.

video B, a hand writing with a white pencil.

What I'm trying to do is making visual morph of the pencil. I am also morphing the hand but you can't notice it.

I want to morph the pencil from up to down.

I have tried allot but every time the pencil turns completely white (0% to 100%)


thanx,

Jos






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Pierre Jasmin
Re: Morphing a hand and a pen
on May 2, 2008 at 10:15:49 pm


I see, then I think what you need is to use the per shape blending on the pen

It's explained in the doc how to do per shape blending and as well there is some examples in support section
http://revisionfx.com/products/reflex/support/
(look for the project that says PerShapeBlending, switch to View Mode Control and render that sequence for an ahah! moment)
For eg: In AE we use the opacity value of the mask itself to do per shape blending.

Basically I think you want at least a different shape at the base of shape and top and you want to animate the blending for that separately so it acts as a wipe (one side of the pen will be blend 100% and the other side will go from 0% to 100% over a number of frames).

Pierre






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jos willem
Re: Morphing a hand and a pen
on May 5, 2008 at 5:27:33 pm

Hi Pierre,

Thanks for your reaction This is the first test with the morph. What do think...?

http://www.buurtsteunpunt.nl/first_test.mpg


Jos



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Pierre Jasmin
Re: Morphing a hand and a pen
on May 5, 2008 at 6:10:43 pm


If your idea is to grab some video frames, paint them and then use the morph or warper to animate, you are getting there. I realize looking at your test that setting a "gradient wipe" with a long object like a pen might be too complicated unfortunately currently no application allows us to do per vertex blending), if the pen shape does not change shape, for that you might consider making an oriented greyscale ramp that follows the pen orientation about and use level on that and wipe a pen color to another like that.

Pierre



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