[Squeakland] Q: Leverage Overlapping Player to Etoys?

[Markus Gaelli]

Hi,

I showed a good friend of mine (a teacher) how to program space  
invaders completely with Etoys.
You can try out the result here:

http://www.squeakland.org/project.jsp?http://www.emergent.de/pub/ 
smalltalk/squeak/projects/petersInvaders.003.pr

We used the common "seesColor" trick for the collision-detection, but  
we found it difficult to determine
which UFO was hit by our laser, so I leveraged the existing Smalltalk  
Method called "Morph >> morphsInFrontOverlapping:"

to a tile in miscellaneous called: "overlappingPlayer" in Etoys. Here  
an exemplifying screenshot:

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Skipped content of type multipart/appledouble-------------- next part --------------


Did we overlook some other way to find out with Etoys which of the UFOS 
have been hit by our shot?

If not, should be put it to miscellaneous? Is it a problem that we only 
return one of
possible many overlapped players? Is there a better name than 
overlappingPlayer?
Should I send the changeset?

Another question: How do you destroy Players with Etoys? Is there 
something there and hidden?
We created the bombs of the UFOS by copying the "mother of all bombs". 
But we also wanted to
destroy them, if they hit the ground.

I usually end up leveraging this from Smalltalk too, but I have the 
feeling, that I am not the only one here...
I guess, you want to protect the innocent from destroying valuable 
players by accident, maybe the effect
of a "destroy-tile"  should be to  stop all scripts and just put the 
player in the trash?

Thanks,

Markus and Peter