Delete All Backdrops and Overlay problem

[Kevin_Ayre]

I've come across an obscure problem with trying to delete backdrops created with an active picture and clearing an overlay redux. The result is the Obstacle data still remains even though the backdrop has been deleted.
See attached example.
Running MMF 2 build r246 under WinXP SP2

There is a workaround, by delaying the Clear Overlay for a frame, but it was hard to find out what was happening. Hopefully Yves can fix it?!

Kev Ayre

[Yves]

I see what happens but it's not easy to fix. The Redraw command sent by the Overlay object to MMF2 overwrites the redraw command triggered by the Delete Backdrops action. This part of the program is quite complicated, and I prefer not to change it in a patch.

There is another workaround if you don't want to delay the clear overlay. Create a background system box object and destroy it immediately. This will refresh the collision mask. (also works with Picture objects). The Redisplay function of Cellosoft's Fast Loop object should work too (I need to add this feature to MMF2, that would be easier...).

[Sphax]

The Redisplay function of Cellosoft's Fast Loop object should work too (I need to add this feature to MMF2, that would be easier...).
>> This function has been added in a build of MMF1.5

[DanielRehn]

If you first clear the overlay, then update it's display (manually) and then delete all backdrops it works just fine

[Yves]

>> This function has been added in a build of MMF1.5

Sphax, could you elaborate please? I don't see what you mean.

[Sphax]

I've just said that, if I remember correctly the option "refresh screen" has already been added to MMF1.5 in the past in a specific build.