2010-12-25T19:35:51+00:00 http://flintparticles.org/forum/ Lussumo Vanilla & Feed Publisher http://flintparticles.org/forum/comments.php?DiscussionID=174&Focus=689#Comment_689 2009-02-15T16:49:12+00:00 2010-12-25T19:35:51+00:00 chien http://flintparticles.org/forum/account.php?u=41

I am having a bit of a problem getting the renderer to render transparent backgrounds with anything other than black in the transparency area.. This despite whether I use PNGs 24 or 32 bit. The ...

I am using createPixelParticlesFromBitmapData() which I see uses getpixel32(). A as particle type I see the pixel is particle2D. At that point I start to get lost as I do not understand how the alpha channel is included in the color information.

Any suggestions?

Thanks

chien]]> http://flintparticles.org/forum/comments.php?DiscussionID=174&Focus=691#Comment_691 2009-02-16T19:31:52+00:00 2010-12-25T19:35:51+00:00 Richard http://flintparticles.org/forum/account.php?u=1

The particle's color property is a 32 bit ARGB color value. Thus, the top 8 bits are the alpha channel. so 0xFFFFFFFF is fully opaque white and 0x80FFFFFF is semi-transparent white (08 = 50% ...

http://flintparticles.org/forum/comments.php?DiscussionID=174&Focus=694#Comment_694 2009-02-17T12:18:17+00:00 2010-12-25T19:35:51+00:00 chien http://flintparticles.org/forum/account.php?u=41

I found the enemy and it was me. I was using a fade action(the problem) along with some other actions that caused the 0 alphas to become 1s. I was under the mistaken impression that the starting ...

I was under the mistaken impression that the starting parameter of 1 was as initial alpha was the particles current alpha .

Of course this does lead me to a question of: Is there an action by which you can fade from the current level of an alpha to an ending alpha?

Thanks,

chien]]> http://flintparticles.org/forum/comments.php?DiscussionID=174&Focus=698#Comment_698 2009-02-17T20:37:33+00:00 2010-12-25T19:35:51+00:00 Richard http://flintparticles.org/forum/account.php?u=1

No, but you could make one. You'll need to store each particle's initial alpha in its dictionary so you can use it for the action.

http://flintparticles.org/forum/comments.php?DiscussionID=174&Focus=702#Comment_702 2009-02-18T12:31:08+00:00 2010-12-25T19:35:51+00:00 chien http://flintparticles.org/forum/account.php?u=41

Thanks for the reply Richard. I accomplished the same thing by creating a custom class modifying your Fade action with about three lines so I maintain similar functionality if the alpha is > ...

I accomplished the same thing by creating a custom class modifying your Fade action with about three lines so I maintain similar functionality if the alpha is > 0;

But while doing it I saw some really interesting possibilities for modifying energy levels etc for some potential sp eff. When I get time I think I will explore some of those potential effects.

I really like this system.

chien]]>