Android Question [Resolved]Libgdx Sprite Transparency

Panagitois Lazos · Apr 23, 2014

Hi all ,
I m new to b4a but im very excited about this great develepment enviroment.
So i started experimanting with Libgdx and i m creating a multiplayer game but i want the other players to
be transparent and i cant find an way to do that with sprite batch .
So any ideas are Wellcome thanks Alot !!

walterf25 · Apr 23, 2014

Panagitois Lazos said:
Hi all ,
I m new to b4a but im very excited about this great develepment enviroment.
So i started experimanting with Libgdx and i m creating a multiplayer game but i want the other players to
be transparent and i cant find an way to do that with sprite batch .
So any ideas are Wellcome thanks Alot !!

I think you might be able to change the alpha parameter, haven't tried it but it should work.

Cheers,
Walter

Informatix · Apr 23, 2014

Walter is right. In the perf_smiley demo, you can see the line: Batch.Color = Smiley.Color. If you change the alpha value of Smiley.Color, you change the transparency.

andymc · Apr 23, 2014

Welcome to B4A! The libgdx library is excellent and well worth learning if you want to get into games development.

Panagitois Lazos · Apr 23, 2014

Thanx guys! ill give it a try and inform you about the results!

Panagitois Lazos · Apr 23, 2014

hmmm i cant seem to set the alpha proprty correctly ,
so lets say i want to set to 50 % transprence
i tryed Batch.Color.alpha(0.5) before my
Batch.DrawRegion3
but nothing happend ...
I know its a little silly question but , as i said im a beginer in b4a

Informatix · Apr 23, 2014

Panagitois Lazos said:
hmmm i cant seem to set the alpha proprty correctly ,
so lets say i want to set to 50 % transprence
i tryed Batch.Color.alpha(0.5) before my
Batch.DrawRegion3
but nothing happend ...
I know its a little silly question but , as i said im a beginer in b4a

1) I suggested to change the alpha value of Smiley.Color, not the one of Batch.Color. It's easy to do in the demo because you just have to change the last parameter of Smiley.Color.SetRGBA (line #118).
2) The Alpha function is not documented and you've been fooled by the function name. In fact, it converts a float value between 0 and 1 to an int value between 0 and 255. Use setRGBA, as in the demo, to change the alpha value.

Informatix · Apr 23, 2014

In the next version, the current Alpha function will be named "to255" and I'll add another function to change only the alpha value.

Panagitois Lazos · Apr 23, 2014

just added

Batch.Color = Batch.Color.setRGBA(1,1,1,0.7)

Batch.DrawRegion3( blah blah blah)

Batch.Color = Batch.Color.setRGBA(1,1,1,1)

Thanx Informatix you are great its working perfectly now!

Android Question [Resolved]Libgdx Sprite Transparency

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