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stoob1969
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Moving background to camera but only at 25%

Jun 12, 2009 3:58 AM

I want the background to move with the camera but at a reduce positioning, say 25% of the normal movements. Can this be done?

 

Thanks for an answers, using AE 7

3546 Views   9 Replies   Latest reply: stoob1969, Jun 19, 2009 7:56 AM
 
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  • Dan Ebberts
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    1. Dan Ebberts,
    Jun 12, 2009 6:41 AM   in reply to stoob1969
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    Probably something like this:

     

    thisComp.activeCamera.transform.position;
    value + (P - P.valueAtTime(0))*0.25

     

    Dan

     
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  • stoob1969
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    2. stoob1969,
    Jun 12, 2009 9:56 AM   in reply to Dan Ebberts
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    Thanks Dan, although I am getting an error when I place it on the position of the layer I only want to move 25%.

     

    I get the error 'AE warning: Class 'Layer' has no property named 'P' Expression disabled.'

     

    Have I done something wrong?

     

    Cheers

     
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  • Dan Ebberts
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    3. Dan Ebberts,
    Jun 12, 2009 10:14 AM   in reply to stoob1969
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    Oops. Sorry, I didn't copy and paste the whole thing. This should be better:

     

    P = thisComp.activeCamera.transform.position;
    value + (P - P.valueAtTime(0))*0.25

     

     

    Dan

     
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  • stoob1969
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    4. stoob1969,
    Jun 13, 2009 12:58 AM   in reply to Dan Ebberts
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    Thanks Dan, now no errors, but the layer doesn't seem to slow down at all compared to the background. The expression is placed in the Position property of the layer and the camera parented to a null still makes the layer move at 100%.I have attached the file if you could help me on this.

     

    S

     
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  • stoob1969
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    5. stoob1969,
    Jun 13, 2009 1:03 AM   in reply to Dan Ebberts
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    Thanks Dan.

     
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  • stoob1969
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    6. stoob1969,
    Jun 13, 2009 1:02 AM   in reply to Dan Ebberts
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    Thanks Dan, no errors now but I have placed the expression on the layer's Postion property and the camera still sees the layer go at 100% compared to the background.

     

    S

     
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  • Dan Ebberts
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    7. Dan Ebberts,
    Jun 13, 2009 7:32 AM   in reply to stoob1969
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    Ah, if the camera has a parent, this should work better:

     

    C = thisComp.activeCamera;
    p0 = C.toWorld([0,0,0],0);
    p1 = C.toWorld([0,0,0],time)
    value + (p1 - p0)*0.25

    Note that you won't see any movement until you animate the camera position over time.

     

    Dan

     
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  • stoob1969
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    8. stoob1969,
    Jun 13, 2009 9:35 AM   in reply to Dan Ebberts
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    Excellent, both answers were great,  didn't realise you had to play the timeline, thanks loads!!!

     
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  • stoob1969
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    9. stoob1969,
    Jun 19, 2009 7:56 AM   in reply to stoob1969
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    I need to have the same proportion of movements in the rotate properties, what code do you need for this?

     

    Cheers

     
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