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AppGameKit Classic Chat / SetSpriteTranparency() and alpha

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Blendman
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Joined: 17th Feb 2014
Location: Arkeos
Posted: 17th Sep 2015 16:08
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Hi

I would like to know if there is a way to decrease the alpha of a sprite which have : SetSpriteTransparency(sprite, 2) (= additive blendmode)

I have tried SetSpriteColorAlpha(sprite, alpha)
But it doesn't work with setSpriteTransparency() set to 2 .

Do you know how I can do that ?

Thanks

http://www.dracaena-studio.com
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baxslash
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Joined: 26th Dec 2006
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Posted: 18th Sep 2015 11:07 Edited at: 18th Sep 2015 11:08
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You have to lower the rgb values. I created a shader for additive blending that can use transparent sprites though:


EDIT: With mine just edit alpha as with normal sprites.

Using AppGameKit V2 Tier 1
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Blendman
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Posted: 18th Sep 2015 14:17
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Hi backslash

thank you for you answer.

I have tried to use your shader, but it doesn't work in my example.
Do you have a little example to see how to use it ?

Thank you.

http://www.dracaena-studio.com
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baxslash
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Posted: 18th Sep 2015 16:43
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If you copy the code into a text file called "additive.ps" then you can apply it to a sprite using


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Blendman
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Posted: 18th Sep 2015 17:12
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I have use the same code (as yours), but it doesn't work.
The sprite is just normal.

I have tried with setSpriteTransparecy(sprite, 2), and the sprite is additive, but I can't change the alpha of this sprite (it's like the normal use, with any shader).

http://www.dracaena-studio.com
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baxslash
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Posted: 19th Sep 2015 10:47
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Maybe I copied the wrong shader then, sorry. I'll take a look when on my dev machine...

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