[etoys-notify] [JIRA] Resolved: (SQ-919) If you rotate an object with an Alpha < 100 it changes color on heading != 0

[Bert Freudenberg (JIRA)]

     [ http://tracker.squeakland.org/browse/SQ-919?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Bert Freudenberg resolved SQ-919.
---------------------------------

    Fix Version/s: etoys 5.1
                       (was: future release)
       Resolution: Complete

Actually, Karl's fix attached to Squeak's 2241 issue works in Etoys.

However, as mentioned in the bug report, only in 32 bit display depth. And we lost the ability to switch to 32 bits - somewhere the 16 bits got hard-coded when we added the display scaling (see #SQ-347). If you turn off the scaling and switch to depth 32 then you can see the rotated translucency just fine. 


> If you rotate an object with an Alpha < 100 it changes color on heading != 0
> ----------------------------------------------------------------------------
>
>                 Key: SQ-919
>                 URL: http://tracker.squeakland.org/browse/SQ-919
>             Project: squeakland
>          Issue Type: Bug
>          Components: etoys
>            Reporter: Stephen Thomas
>            Priority: Critical
>             Fix For: etoys 5.1
>
>
> To re-create take a Rectangle and change its alpha, then rotate it.
> Same problem observed for Ellipses and Sliders.
> This fix is need for an area model of multiplication (and other things of course)  on  gridded playfield and would like to have this working so kids can rotate and move around the rectangles  while exploring/explaining/communicating.

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