[Etoys] alpha property

[Karl Ramberg]

On 2009-04-23 13:24, Bert Freudenberg wrote:
> On 23.04.2009, at 09:41, Angel Arias wrote:
>
>    
>> i'd like to have different images in a project and change their alpha
>> property dynamically using scripts.
>>
>> since i can't find the color category of an image in the viewer i
>> don't know how to access its alpha property.
>>      
>
>
> Using Etoys tiles you can only hide and show an image completely, not
> adjust its transparency.
>
> - Bert -
>    

You can do image adjustments in a very slow way using a turtle to read 
each pixel and adjust the color and draw it another place :-)
I did a project that does that here:
http://wiki.laptop.org/images/8/8a/ColorReadingAndWriting-17.xo

To add alpha channel would not be hard, but this project is more prof of 
concept and  it is slllllooooowwww


Karl

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.laptop.org/pipermail/etoys/attachments/20090423/e9aeef07/attachment.htm