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Bitbreaker
Registered: Oct 2002
Posts: 508 |
Compotime: Show me your (vector)balls
After several comments arised that such an amiga-ball can be filled faster, i now want to call out a filler-compo for our coders.
Requirements:
The vector must be rendered in hires, background is white, foreground is dark red.
There's a raster-irq running that splits the screen at $2d and $f2 to set the background and border color to white and black, as seen in the screenshot. Means, there is a charline free in the bottom, that is where the benchmark results are displayed with the system charset. Displaying the result with screencodes is enough for us coders, but hex or decimal values are okay too.
The animation will be precalculated to see the power of your filler only. Therefore a data.bin is provided that contains all animationsteps for all faces with culling etc. already done.
The data structure may be altered to your needs, but not the animation itself, obvious isn't it?
The structure of data.bin is as follows:
byte x1 | $80
byte y1
byte x2
byte y2
byte x3
byte y3
byte x4 (optional, depending on if we have a triangle or quad)
byte y4 (optional, depending on if we have a triangle or quad)
As you can see faces can have 3 or 4 vertices, the first vertice is marked with bit 7 set, to be able to determine if a face consists of 3 or 4 vertices and to have a break out point for a finished frame, which is marked with the value $ff. If there's further questions about the data-format, don't hesitate to contact Bitbreaker
The filling must happen fullframe and fullsize, means, no interlacing or other cheap tricks with reducing resolution.
A counter for benchmarking must be implemented to count the frames until 256 frames have been displayed, it must be made visible in the bottom line.
The lowest value achieved counts (as there might be some jitter), for that, each entry must run in an endless loop.
The whole mem can be used, but every free byte of mem gives extra kudos.
Deadline is June 25th 0:00.
If the deadline is extended, a severe drama is expected, if not, you are out. Also i'll participate with an own entry, make a drama about it! :-)
Entries must be handed in to Bitbreaker and must not be released beforehand. They all will then released after the deadline, for maximum thrill and drama :-)
Each entry must be executeable with run.
SO DO YOU HAVE THE BALLS? |
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Bitbreaker
Registered: Oct 2002
Posts: 508 |
Not possible, as it bloats the data.bin by another 33% and makes my code go BOOM then :-) But here's a quickly done comparison (though no idea if wings3d uses similar values for perspective compared to mine):
Also, if you think your approach is faster: proof it! :-) |
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JackAsser
Registered: Jun 2002
Posts: 2014 |
No perspective on the ball will be almost unoticable. If u do it realtime noone would be able to tell i can assure u. |
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Oswald
Registered: Apr 2002
Posts: 5095 |
one cool thing without perspective I notice on this gif is that you can draw many lines with one bigger line instead.
HCL, perspective also adds distortion which helps the mind see the 3dness more, doesnt it? |
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JackAsser
Registered: Jun 2002
Posts: 2014 |
Quote: one cool thing without perspective I notice on this gif is that you can draw many lines with one bigger line instead.
HCL, perspective also adds distortion which helps the mind see the 3dness more, doesnt it?
Just rotate it a bit and symmetry is gone... |
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Cruzer
Registered: Dec 2001
Posts: 1048 |
Let's stick to the original precalculations, otherwise the drama will be too intense. But I wouldn't mind getting the full set of coords, including hidden ones. I think it would be easier to pack that way. |
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JackAsser
Registered: Jun 2002
Posts: 2014 |
Quote: Let's stick to the original precalculations, otherwise the drama will be too intense. But I wouldn't mind getting the full set of coords, including hidden ones. I think it would be easier to pack that way.
I agree |
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Bitbreaker
Registered: Oct 2002
Posts: 508 |
So here's the C-programme that generates the data.bin for you all to play around and in the end miss the deadline for more drama :-P Attention, contains a Makefile!!1! /o\ |
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Cruzer
Registered: Dec 2001
Posts: 1048 |
Thanx, Bitbreaker! It compiled and executed on first try. Amazing! |
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enthusi
Registered: May 2004
Posts: 677 |
Why not such a vector sphere? ;-)
(bad looking example) |
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JackAsser
Registered: Jun 2002
Posts: 2014 |
©enthusi: because that would look undistorted and would be too easy to implement since there are no quads in it. :P But yeah... I agree. Also getting the rotated coordinates for such a sphere in real time is easier that Bitbreaker's I think, not 100% sure though, but it feels more simple. :)
But then again... it's not AAAAMIIIIGAAAAAH! |
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