demo effect questions

[va!n]

Maybe this links help you how to create a plasma cloud:
http://pacific.mpi-cbg.de/wiki/index.php/JRuby_Scripting

Btw, if you find and d/l the old Amiga BlitzBasic archive.. just take a look to its examples... their was an very cool and easy to understand PlasmaCloud source included.

[Clyde]

Cool and thanks. Hopefully this is helping Spitfire, as Im not meaning to topic hijack ( far from it ), rather point the dude in the right direction.

If I remember correctly with the original Amiga Blitz Basic 2, it used some assembler and copper interrupts. I will see if i still have the cover disk for BB on Amiga.

[ferris]

Tunnels can be raytraced in 8x8 or 16x16 blocks with tex coords interpolated between them, or precalced, where the movement is created by just adding 1 to the v coord of each pixel per frame.

That plasma looked to me like precalced perlin noise on each channel, then adding 1 to each channel color (RGB 255) and letting it overflow...

[Himura78]

It's a 320x400 screen-mode showing three static plasma-clouds (a red, a green and a blue one) drawn in alternating scanlines (and alternating row-order for each pixel), each using a part of the 256-colour palette.
The motion is produced by color-cycling the palette-part of each sub-image.
They're also toggling between two different row-alternations each frame (two 320x400 images fit the 256kb of standard-vga-ram).
Just zoom into the image to get the idea:

Hi, I was Googling around for some information about the Future Crew demos and bumped into this post. I haven't found much information as detailed as this about their effects so it was really cool to read this, and zoom into the image myself to see what you meant

I was just wondering, do you know how they made the plasma effect in Second Reality? As it seems a lot more dynamic than the one in Unreal (which as you say seems to be made out of static plasma clouds).

[Himura78]

Also, if anyone's interested in generating a static plasma as a component to making an effect like in Unreal (not Second Reality), check out this link:

http://www.ic.sunysb.edu/Stu/jseyster/plasma/

It describes an algorithm for making a "plasma fractal".