com!online 2002 July/com!online0702.iso/software/livemotion/DATA1.CAB/Automation/Scripts/Effect - Spiral Exit.js

Text File | 2002-05-13 | 4.8 KB | 169 lines

/***************************************************************
ADOBE SYSTEMS INCORPORATED
Copyright 2002 Adobe Systems Incorporated
All Rights Reserved

NOTICE:  Adobe permits you to use, modify, and distribute this
file in accordance with the terms of the Adobe license agreement
accompanying it.  If you have received this file from a source
other than Adobe, then your use, modification, or distribution
of it requires the prior written permission of Adobe.
***************************************************************/
/***************************************************************
Author: Mary Obelnicki
***************************************************************/

/***************************************************************

The following script creates a key frame animation effect on
the currently selected objects.

Function:
    sprialExit(letters, turns, radius, frames, stagger, forward, startNow, keyFrameRate)

Arguments:
    <letters> LMObject - an array of the objects to apply the
        effect. Does not have to be text objects.  It can be
        any LMObject.
    <turns> integer - the number of rotations (360 degrees)
    <radius> integer - the final radius of the spiral rotation
    <frames> integer - the length of the animation for each
        object
    <stagger> integer - the number of frames to stagger the
        start of each animation
    <startNow> boolean - should the animation start now, at
        the current frame, or end now.
    <keyFrameRate> integer - the number of frames between key frames.

***************************************************************/

/***************************************************************
To change the behavior of this script, make your changes below
***************************************************************/

sprialExit(application.currentComposition.selection, 2, 50, 24, 3, true, true, 1);

/***************************************************************
DO NOT EDIT BELOW THIS LINE
***************************************************************/

function sprialExit(letters, turns, radius, frames, stagger, forward, startNow, keyFrameRate)
{
    if(letters.length < 1)
    return;
    var xsd = new Array;
    var ysd = new Array;
    var oriRot = new Array;
    var oriScalex = new Array;
    var oriScaley = new Array;
    var oriOpacity = new Array;
    var i;

    for(i = 0; i < letters.length; i++)
    {
    xsd[i] = letters[i].position.x;
    ysd[i] = letters[i].position.y;
    oriRot[i] = letters[i].rotation % 360;
    oriScalex[i] = letters[i].scale.x;
    oriScaley[i] = letters[i].scale.y;
    oriOpacity[i] = letters[i].opacity;
    }

    var xoffst = xsd[0];
    var yoffst = ysd[0];
    for(i = 0; i < xsd.length; i++)
    {
    xsd[i] -= xoffst;
    ysd[i] -= yoffst;
    }

    var xaverage=0;
    var yaverage=0;
    for(i=0; i < letters.length; i++)
    {
    xaverage += letters[i].position.x;
    yaverage += letters[i].position.y;
    }

    xaverage = xaverage/letters.length;
    yaverage = yaverage/letters.length;

    var xs = xoffst -radius; //cl.position.x - 2 * radius;
    var ys = yaverage;

    var frame0;
    if (startNow)
     frame0 = letters[0].currentFrame;
    else
    frame0 = letters[0].currentFrame - (stagger * (letters.length - 1) + frames);
    var angle = -turns*2*Math.PI;
    var dAngledf = angle/frames;

    //set up initial conditions

    for (j = 0; j < letters.length; j++)
    {

    var cl = letters[j];

    cl.stopwatch.position = true;
    cl.stopwatch.rotation = true;
    cl.stopwatch.scale = true;
    cl.stopwatch.opacity = true;

    }

    var df;

    for (df = 0; df <= frames; df += keyFrameRate)
    {
    var curAngle = dAngledf * df;
    var curRadius = radius *(1- df/frames);
    for (j = 0; j < letters.length; j++)
    {
        var i;
        if(forward)
        i=j;
        else
        i = letters.length - 1 - j;
        var cl = letters[i];

        cl.currentFrame = frame0 +df + (j * stagger);

        cl.position.x = xs + ((curRadius + xsd[i]) * Math.cos(curAngle));
        cl.position.y = ys + ((curRadius + ysd[i]) * Math.sin(curAngle));
        cl.rotation = curAngle*(180/Math.PI) + oriRot[i]; //maintain original angle through spiral?
        cl.opacity = oriOpacity[i] * ( 1- df/frames);
        cl.scale.x = (1- df/frames) * oriScalex[i];
        cl.scale.y = (1 - df/frames) * oriScaley[i];

    }


    }

    for (j=0; j<letters.length; j++)
    {
    var i;
    if(forward)
        i=j;
    else
        i = letters.length - 1 - j;
    var cl = letters[i];

    cl.currentFrame = frame0 + frames + (j * stagger);

    cl.position.x = xs + ((0 + xsd[i]) * Math.cos(0));
    cl.position.y = ys + ((0 + ysd[i]) * Math.sin(0));
    cl.rotation = angle*(180/Math.PI) + oriRot[i];
    cl.opacity = 0;
    cl.scale.x = 0;
    cl.scale.y = 0;

    }

}