List of some sources of entropy: 1) Time, timers, delays, elapsed time between some two points in program. 2) Threads execution order, it can't be same, unless if you syncronize all with appropriate methods (mutexes, events etc.) 3) Program base address (where it was loaded), current stack pointer :D, addresses of memory allocated in heap... 4) User input: keys down, keys up, mouse movements... 5) OS events: WM_MESSAGES, hmmm something else :) 6) Polling stuff: socket recieve packets, socket send packet, sound in poll mode (is there space for next sound samples?)... 7) Special random devices that produces REAL RANDOM! You can expand this list forever. But when it comes to emulators, you may restrict your emulator core from accessing to all this stuff except user input. So your emulator must have only two methods: 1) advance time (emulate frame / emulate miliseconds ...) 2) change current user input (for rerecording) and restrict from any other external input that may have entropy :), also restrict frontend from changing any data used by core. Use "encapsulation" method :). Question: how then I'll show image and play sound if it produce entropy? Answer: yes it produce entropy, but as far as you don't access it from core: (advance time method) you can use it, because while you didn't call time advance methods, state does not change.Language: cconst int A = <some>; // no entropy const int B = <some>; // no entropy int seed = 0; // no entropy int rand() { seed = A*seed + B; // A, B, seed - no entropy -> new seed - no entropy return seed; } // so this func deterministic void main () { seed = time(0); // time(0) - source of entropy, so seed isn't deterministic. for (int i=0; i<10; ++i) printf("rand() = %d\n", rand()); // there will be 10 random numbers but! if you know first, you can easily determine all 9 after. } // so if you set seed to some certain value in main, you'll get deterministic program. it will run always same.
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It's made in 2D, but if you may imagine that there some surface.
Question is: What That Surface?! (in 3D)
How it's made: just draw line between points (0,i) (1-i,0) for i = 0 to 1 by 1/n
:)If you cannot do turing complete computations, you haven't been executing code.
My personal criterion for "arbitrary" would be: can you use it to replace the game with SMB1, Tetris or any other game available on the platform? If you can't, it's not arbitrary enough.
To do so, you must exercise enough control over the platform to
- stop the previously running game from executing
- execute your own turing complete computations
- load or create new game assets, including images and sounds
- have full access to the platform's inputs (gamepad, keyboard, mouse, ...) to load new data
- have full access to the plaform's outputs, usually video and sound
f = io.open(file,'r');
all = f:read('*a');
s,e = string.find(all,'X1 Y2',1,true); // find from start plain text
(s,e - start, end, indices)
f:close(); // don't forget!local l = 1;
for line in io.lines(filename) do
s,e = string.find(line,pattern,1,true);
if (s ~= nil ) then // I don't remember correct condition)
return l,s,e; // returns line number, start, end;
end
r = r + 1;
end* Being able to "see" things outside the screen with feos' script helps immensely.
* The third lock screen was weird. It does not require all enemies to be dead. My best understanding is that it allows you to progress if either 1) there is 0 to 1 enemy left, and that enemy is a big guy 2) there are 0 to 2 enemies left, and neither is a big guy
Looks like we do have a problem here;
I understand your preference for Gens over BizHawk, but we're stuck on those damn platforms.
Also, I've lost something really important, or maybe the most important thing on a TAS; motivation...
So, before it reaches a point that would lead me into dropping the project, I'll keep on working on a BizHawk version.
and of course, r57shell agreeing to switch to a new emulator.
We're not going to work on the Gens version for a while.
The person got catched can counter by a catch to who catching him.
I was verus with my friends and we got time up with no damage because counter-catch.
http://www.youtube.com/watch?v=9COIMF6cFiw http://www.youtube.com/watch?v=q0x2oPe8l5g http://www.youtube.com/watch?v=343dxeTUF2U
Err... Users can't vote before getting a few posts first (and for good reason).
Upthorn calculated the fastest routes ages ago.