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Forums > C64 Productions > C64 Demo with Sprite Bob Vectors
2010-03-31 10:09
Monte Carlos

Registered: Jun 2004
Posts: 370
C64 Demo with Sprite Bob Vectors

Does anybody know a demo, where they used
multiplexed sprites to make bob vectors?

Monte
2010-03-31 10:40
Mace

Registered: May 2002
Posts: 1799
Correct me if I'm wrong but:

Bobs are sort of movable objects like sprites are. Bobs on C64 are often just plotted graphics in two or more frames to make it appear as if they are moving.

Vectors are lines drawn between two points.

How can you combine those to bob vectors?
What are bob vectors?
2010-03-31 10:49
Frantic

Registered: Mar 2003
Posts: 1661
I think he refers to 3d cubes (or 3d represented by 2d objects of different sizes more generally), where the corners of the cube are represented by "balls" (sometimes called vectorballs and similar) of different size depending on depth.

See games like Power Drift for a very nice example of "3d" implemented with 2d graphics. :) The game world can be rotated etc..

http://www.youtube.com/watch?v=ogGHLFsa9Io&feature=related

Even if C64 doesn't have this "unlimited zooming sprites" feature (hehe), it would be nice to see some general experimentation with other ways of representing 3d on the c64 apart from the typical vector style.

Jackasser gave me a link to some C64 game which had a sort of "3d" approach once, but I forgot the name. It was something where the game world was a vertical tower, which was round (having "depth").
2010-03-31 11:52
enthusi

Registered: May 2004
Posts: 679
vectors or rather vertices are simple 'positions'.
Usually referred to when meaning 3d positions :)
However, lines are just lines (potentially between two vertices).
Smartass ftw \o/

And grahams latest loader did just that.
Check out 3DEH:
3DEH
2010-03-31 12:34
Monte Carlos

Registered: Jun 2004
Posts: 370
Yeah ok,

sprites are not bobs. Thats right. I meant rotating 3d vectors, where only at each edge or at the face centers a sprite is positioned. So the loader part from 3deh is a good example for eight sprites. My question was, which demos used sprite multiplexing to create such an effect. For example you can make a vector cube from eight sprites by setting the sprite on the edges of the cube and then rotate them. You may also want to place sprites in the middle of each cubes face, so you need 8 sprites for the edges plus 6 sprites for the face centers, which makes 14 sprites. Of course this is only an example.

Greetz Monte
2010-03-31 13:35
WVL

Registered: Mar 2002
Posts: 924
The Wild Bunch has multiplexed vector bobs, but there's still only 8 points (each point is made from 2 or 4 sprites, iirc)...
2010-03-31 13:56
Slammer

Registered: Feb 2004
Posts: 449
There was one in 'Camel Park'.
2010-03-31 13:57
wacek

Registered: Nov 2007
Posts: 526
Check the 'vector bob spiral' part in Biba 2 for example... However that probably are not sprites :)
2010-03-31 21:07
Danzig

Registered: Jun 2002
Posts: 446
for maximum impression watch zodiacs one:

The Legacy


just "perspective" is missing but he could have achived that with ease...
2010-04-01 10:16
JackAsser

Registered: Jun 2002
Posts: 2038
Quote: The Wild Bunch has multiplexed vector bobs, but there's still only 8 points (each point is made from 2 or 4 sprites, iirc)...

6.
2010-04-01 10:18
JackAsser

Registered: Jun 2002
Posts: 2038
Axis made, imho, the most fantastic vector bob part ever in Oxyron Party v2 Invitation. He used sprites together with soft-bobs at first, but the sprites actually made it slower iirc.
 
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