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Thread: Camera Dad

  1. 25th November 2008, 08:30 #1
    jfotter
    jfotter is offline Member
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    Default Camera Dad

    I am trying to replicate a "Camera Dad" expression that I say one time created for the flame in After Effects. It's an expression to calculate the scale of a 3D layer to fill the FOV based on it's distance from Camera. So as you move the layer to or away from camera is calculates the exact scale. I can't seem to remember where I saw this. Unfortunately I don't have a flame at my access right now and I don't remember enough about the math to make it work. Any suggestions would be great.

    Jason Fotter
    www.theoutfitvfx.com
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  2. 26th November 2008, 05:22 #2
    rebusfilm
    rebusfilm is offline Member
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    Default

    You can parent the 3d layer to the camera and then use the following expression for the scale property:
    temp=100*transform.position[2]/thisComp.layer("Camera 1").cameraOption.zoom;
    [temp, temp, temp]
    This requires that the layer is perpendicular to the camera though...
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  3. 16th December 2008, 05:24 #3
    jfotter
    jfotter is offline Member
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    Default Thank You

    This worked perfect.....
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