Scratch

You still don't know what I mean. If we use Ghost Function, all of the image would become transparent even though not all of "square paper" of this Sprite full of drawing. With transparency layer, we can make "non square" for each Sprite. We can also make a hole in one sprite, so the other sprite which is lying in the bottom of that sprite could be shown.

I hope you understand. Forgive me for my limited ability in English writing.

Iwan Suryolaksono

iwansuryo wrote:

You still don't know what I mean. If we use Ghost Function, all of the image would become transparent even though not all of "square paper" of this Sprite full of drawing. With transparency layer, we can make "non square" for each Sprite. We can also make a hole in one sprite, so the other sprite which is lying in the bottom of that sprite could be shown.

I hope you understand. Forgive me for my limited ability in English writing.

Iwan Suryolaksono

Sorry for not understanding, but what do you mean by "square paper" and "non-square"? Are you talking about the different pixels in the sprite (the tiny dots that make of a picture)

This might just be a matter of semantics but I consider that the paint pallet in the Scratch paint editor includes the color "transparency".  You can select this "color", just like the other colors, and then draw with it, use it in the fill tool, and use it with the shape tools.

I understand that this is not quite as nice as having the ability to select any given color and make it become transparent but at least we have something to work with.

iwansuryo wrote:

Hello everybody,

I have programming background in Flash and Animation Studio. When I try to use Scratch, it was very great program in the simplicity matter. Many building blocks can be build to cover many subtle area in multimedia programming. But I am very sad when trying to implement masking function like many multimedia program have. The main lack of Scratch is the disability to set the transparency of Sprites! It makes the layering function very limited, or I can say almost useless. When we can set the transparency, we will get masking function in very easy way. Masking function is vital in multimedia programming.

I know that we can use a pen or make a layering Sprites function in limited way, such as in some tricks to make Health Bar or Sand Timer, but it is not general approach that can be done for masking function. I also know that not all image format support transparency layer, such as JPEG and BMP. But we can set image in PNG format which is very useful to do this. You can learn it in easiest way from Moho, which now has transformed into Anime Studio. Moho is amatir program, so I can hope that it can be implement easily within Scratch.

Thank you very much for your appreciation, especially from Scratch Developer Team.

Iwan Suryolaksono

but you can use ghost effect it basically IS transparencey! (of course with a different name)          hope that helped!

The "ghost" effect block can be used to set transparency, although you will have to expirement to get the exact amount you want. Good luck! 

You're right! I've been trying to do that! The ghost effect nearly makes it though, {blocks}<set[ ghost ]effect to( whatever)>{/blocks} It doesn't exactly work with mine. *scratching head*

i agree, in flash's color selection you can select any colour and then edit its alpha (transparency) it would be nice if scratch could do the same, would save alot of effort.

Dudeson wrote:

uhm? cant you just make a transparent png in photoshop for example? and then import it???

Unfortunately, Scratch can't handle semitransparencies. It'll just convert it to some strange colour 

wich color I have to select if I want "earase" a dot?

I mean,

<pen down><set pen color to( TRANSPARENCY )>
I want clear something, but not all like the <clear> command does it
or a TRANSPARENCY <stamp>

is there a color " -1 " (minus one) or is there no / any way to clear only a little bit of a picture.
I mean while the program is running, not in the included Paint

eraser down and eraser up, or set color to eraser-color

Last edited by xaby (2009-06-09 09:59:53)