problem tracking a flare effect to camera movement...


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problem tracking a flare effect to camera movement...
by david lieberman on May 1, 2008 at 4:18:03 pm

Hi,

I've got a video clip which i shot of an alleyway and its a bit shaky... in the back of the alleyway i've added a glowing window. Its a solid layer with a sapphire lens flare added to it... i'v managed to make the layer move with the camera shake by parenting it to video clip (after i tracked it and all that) but my problem is that the flare doesn't track with the layer...

is there anything i can do to make the flare effect itself track or do i need to change the position of it frame by frame?

thank you...

thanx for the help.

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Re: problem tracking a flare effect to camera movement...
by Dan Ebberts on May 1, 2008 at 4:52:36 pm

I'm not familiar with that plugin, but it's probably just a matter of using a layer space transform expression like this:

L = thisComp.layer("your window layer");
L.toWorld(L.anchorPoint);

Some variation of that, depending on how you have things set up.

Dan

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Re: problem tracking a flare effect to camera movement...
by david lieberman on May 1, 2008 at 5:20:20 pm

Hi dan,

Thanks for the help. Im not amazing wtih expressions, so i think im dong something wrong.. I've tried to apply the expression to the flares position value with no luck, also applied it to the layer's position value same result...

am i misunderstanding you?

thanx for the help.

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Re: problem tracking a flare effect to camera movement...
by david lieberman on May 1, 2008 at 5:22:28 pm

hi dan, sorry im an idiot, i had the anchor point in the wrong place!!! thank you very much, you just taught me something very valuable for what im doing!!!

david.

thanx for the help.

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