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Remember: Yellow on the inside, then to orange and red on the outside.
Move these sprites accross the screen.
Here is another method:
Use area sampling to generate fire (These techniques should really be written in assembly).
You will have to set a specific palette though.
Also... if you're attempting to do color-additive alpha blending (a common effect for explosions), your best bet is to use D3D's Immediate Mode, so that you can get hardware acceleration. I believe someone (I think his name was Tobias?) wrote a gamedev.net feature article on this.
Hope it helps...
Mason McCuskey
Spin Studios
www.spin-studios.com
I never used palettes before, but if I create some B/W shapes
with an spray or airbrush, it is easy to just load a
red,orange,yellow,white palette into this image and everything
will look ok?
-Tank2k
I'm not sure if this is really what you want, but if you want algorithmic explosions, this is probably a good place to start.
http://www.gamedev.net/columns/features/diariesandsites/javaextreme/physics.htm
Good luck...
------------------
-Kentamanos
1. Create a new document in RGB mode.
2. Use the airbrush to paint some simple black dots on
a white background.
3. Go to the mode menu and change it to Indexed Color.
4. Go to Color Table... under the mode menu and select a
color table (a palette) called Black Body. This is a
256 color palette with colors going from black-red-orange-
yellow to white.
5. Click OK.
6. Your dots should now look like hot, white-centered
fireballs with yellow-red outer edges on a black background.
I also have Paint Shop Pro, so I saved the bitmap and the palette
to a file and loaded them, and there was hardly any difference.
However, I think bitmap looked somewhat better in Photoshop.
To get it to work in PSP, you have to Decrease Color Depth to
256 colors (8-bit) and then goto Colors -> Load Palette
and make sure you have Maintain Indexes selected when loading
your palette.
I don't know where this Black Body palette comes from (if you
can't find it in your directories), but if anybody wants it, I
could try to email it. It is a standard Microsoft PAL file, so
it should work in most graphic programs.
-Tank2k
[This message has been edited by Tank2k (edited September 17, 1999).]
Also, can anyone offer techniques to speed up explosions (other
than writing it all in assembly) that are drawn translucently
where you can still see the background pixels under the explosion?
-Tank2k
I think that you want to use other colors than red->orange->yellow->white.
Try using 64 colors. 64=white 0=black, than you have 192 colors left.
