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On 2009-04-23 13:24, Bert Freudenberg wrote:
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cite="mid:9E0AF39C-9A19-487E-AB18-E32CE91B439F@freudenbergs.de"
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<pre wrap="">On 23.04.2009, at 09:41, Angel Arias wrote:
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<pre wrap="">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.
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<pre wrap=""><!---->
Using Etoys tiles you can only hide and show an image completely, not
adjust its transparency.
- Bert -
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<br>
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 :-)<br>
I did a project that does that here:<br>
<a class="moz-txt-link-freetext" href="http://wiki.laptop.org/images/8/8a/ColorReadingAndWriting-17.xo">http://wiki.laptop.org/images/8/8a/ColorReadingAndWriting-17.xo</a><br>
<br>
To add alpha channel would not be hard, but this project is more prof
of concept and it is slllllooooowwww<br>
<br>
<br>
Karl<br>
<br>
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