[Dinesh Salunke]

Hello Dan,

I am talking on the similar lines, currently I am also doing pretty much the same way you do, but its really dirty way, and i am still learning the whole coding thing.

currently, I am using a string.contains to find keywords, then using a switch statement I am calculating and substituting the keyswords with calculated values

this works but is surely not the best way to do it. also I want to be able to write keywords for functions for example


/*
Key Object which represents each keyframe in property
*/
function Key ( args )
{

}

//This functions takes care of setting the key and assigning the values
Key.prototype.setAt = function ( property, time )
{
var _layer = property.propertyGroup( property.propertyDepth );
var _comp = _layer.containingComp;

if ( this.ValueType == undefined || this.ValueType !== property.propertyValueType )
return 0;
if ( this.nTimeOffset == undefined )
return 0;

var keyIndex = property.addKey ( time + this.nTimeOffset );
if ( this.nValue !== undefined )
property.setValueAtKey ( keyIndex, this.nValue );

if ( this.Expression !== undefined || this.Expression !== "" )
{
var val = eval( this.Expression );
if ( val !== undefined )
property.setValueAtKey ( keyIndex, val );
}
}

//helper function which can be called from the script to get the value of certain key frame
function _KeyValueAt ( index )
{

}


Sample Expression :

"_keyValueAt ( -2 );"

this expression will be evaluated in the setAt function,

this works but I want the function to know the 3 variables
1. property
2. _layer
3. _comp

so that it can use these to calculate the values

hope I was right to the point this time

[Dinesh Salunke]

Its one of your expressions, from the Expressioneer’s Design Guide page on your site. I have posted it below

target = thisComp.layer("Alpha");
alpha = target.sampleImage(transform.position,[1,1])[3];
linear(alpha, 0, 1, 0, 100);


[Dinesh Salunke]

One way to do this would be to
1. Attach both the comps to Null
2. Rotate the null 360 deg, for x numbers of secs.
3. Precomp both comps and the null, and trim it to the x secs
4. Add Time remap with loopOut() expression to precomp and use Timewarp effect to speed up and slow down the animation.

hope it helps.