Adding Lab colors to swatch - not implemented - Workaround?

[Guest]

Dear all

I tried to add a LabColor with an Illustrator script.

function addLabColorToSwatch(L,a,b,swatchName){

var color = new LabColor();

color.l = L;

color.a = a;

color.b = b;

var swatchgroup = app.activeDocument.swatchGroups.add();

swatchgroup.name = "test swatchgroup from jsx script";

var swatch = app.activeDocument.swatches.add();

swatch.name =  swatchName;

swatch.color = color;

swatchgroup.addSwatch(swatch);

return true;

} 

addLabColorToSwatch(1,2,3,"test");

The script crashes on the Line  'swatch.color = color;' with "Error 1202: Not implemented"

This seems to a bug. I allready filed it. I'm asking if anybody has a workaround.

Thank you very much

best regards,

Alexander

PS: Original discussion: http://forums.adobe.com/message/4986457#4986457

[CarlosCanto]

you can add it as a spot

function addLabColorToSwatch(L,a,b,swatchName){
    var color = new LabColor();
    color.l = L;
    color.a = a;
    color.b = b;
    var swatchgroup = app.activeDocument.swatchGroups.add();
    swatchgroup.name = "test swatchgroup from jsx script";
    var newSpot = app.activeDocument.spots.add();
    newSpot.name = swatchName;
    newSpot.colorType = ColorModel.SPOT;
    newSpot.spotKind = SpotColorKind.SPOTLAB;
    newSpot.color = color;
    var newSpotColor = new SpotColor();
    newSpotColor.spot = newSpot;
    swatchgroup.addSpot(newSpot);
    return true;
} 
addLabColorToSwatch(72,-38,52,"test");

[pixxxelschubser]

That's right. Only a spot color can be LAB. The same in the UI.

[Guest]

@CarlosCanto:

I know  one can add spot colors based on Lab. But I would also like to add normal Process colors based on Lab values.

@pixxxel schubser

On the UI:

Go to Swatches. Add a new Swatch. Choose 'Process Color' and choose Color Mode 'Lab'. So you have added a swatch base on Lab values. That's what a try to do in code.

So basicaly I want to to add a 'Process Color' based on Lab Values.

Thanks

[Muppet Mark]

And have you looked at…

Array of number convertSampleColor (sourceColorSpace: ImageColorSpace, sourceColor: Array of number, destColorSpace: ImageColorSpace, colorConvertPurpose: ColorConvertPurpose[, sourceHasAlpha:bool=false][, destHasAlpha: bool=false])
Converts a sample-component color from one color space to another.

Parameter	Type	Description
sourceColorSpace	ImageColorSpace: ImageColorSpace.GrayScale ImageColorSpace.RGB ImageColorSpace.CMYK ImageColorSpace.LAB ImageColorSpace.Separation ImageColorSpace.DeviceN ImageColorSpace.Indexed	The source color space.
sourceColor	Array of number	The color to convert, an array of color components. First location of the array should contain alpha if source-has-alpha is true.
destColorSpace	ImageColorSpace: ImageColorSpace.GrayScale ImageColorSpace.RGB ImageColorSpace.CMYK ImageColorSpace.LAB ImageColorSpace.Separation ImageColorSpace.DeviceN ImageColorSpace.Indexed	The destination color space.
colorConvertPurpose	ColorConvertPurpose: ColorConvertPurpose.defaultpurpose ColorConvertPurpose.previewpurpose ColorConvertPurpose.exportpurpose ColorConvertPurpose.dummypurpose	The parameter which passes the purpose of conversion.
sourceHasAlpha	bool	True if alpha channel is present in source color. (default: false) (Optional)
destHasAlpha	bool	True if alpha channel is present in destination color. (default: false) (Optional)

[Guest]

Process colors added on the UI based on Lab will become spot colors.

So for Process color based on Lab values, use convertSampleColor as mentioned by Muppet Mark, will do the thing.

But generaly of course Lab colors are spot colors.

Thank you all for your answers