World: r3wp

I've made C DLL on windows previously, so I will try to make it cross-platform.

Anton: interesting...do you have any screenshot ?

Boring... my test image is 2x2.

:)

What platform are you on ?

Windows (Seven)

Ugh...

I never had a problem with it since a month. It's really stable.

Ok, whatever. :-P

(-; I don't mean to be rude by that..)

No problem

Anton, have you seen new speedy version of my tunnel script ? :)

Lookup table for pixels position and tunnel coordinates helped a 
lot...

I guess your dll would help. Would you keep acceleration only for 
pixel drawing? or maybe some higher functions?

Oh no! Calling a DLL function just to draw one pixel would be so 
slow! I will of course make it process a whole frame at a time. So 
basically, I think the tunnel drawing function will move into C.

Just tried latest version - framerate at least double.

Ok, so you've pre-calculated the pixel mapping, avoiding the square-root 
and arc-tangent etc. in the main loop.

You lost some possible dynamism by making this move. The C should 
be fast enough to calculate it on demand.

Anton - how's that your following demo is decently fast? Is it completly 
different technique?


do http://www.rebol.net/demos/7B191CB087929081/christmas-drive2.0.1.r

heh, fun! Makes me think of Out Run: http://en.wikipedia.org/wiki/Out_Run

Yes, in that one I used AGG to scale and composite a relatively low 
number of frames, zoomed to different distances.

looks nicely smooth, and fast. Almost screams for addition of small 
car and doing some simple game upon it :-)

Yes, I was thinking of the techniques used in games like Out Run 
while I making it.

Reminds me also of Lotus Turbo Esprit (Amiga)

Pekr, on my old machine, I was hitting the limits of detail I could 
put in without reducing the framerate too much. I had to tweak it 
a lot to keep it looking fast and detailed enough. It was difficult.

Yes, Lotus Turbo Esprit I played a lot.

All the good old racing games: http://eager.back2roots.org/RAC.html
:-)

I've nearly ported tunel.r to C. I've got some expanding circles. 
Time for sleep...

waiting to see C and Rebol working together :)

Well, I finished port to C on linux today. But you're on windows, 
aren't you? You'll have to wait while I port to windows.

I'm looking into TCC.

TCC doesn't look good to me. It seems the project is moving slowly, 
and there was infighting about the version control system being used.

Tiny C Compiler (TCC).

I've installed an older version of TCC and tried compiling a simple 
example program, but it failed to compile, and the error messages 
led back to the above-mentioned problems, where patches to fix the 
compiler can be found in a non-main maintainer's forked repository, 
which is no longer supported by him.

Thus, I will try PCC next and then Clang/LLVM (as also mentioned 
by BrianH).

They both look very promising.

Hi. Is there a way to call a method (an object function) programmaticaly 
? ie supposed I've got a Car object with a function "drive-to" inside. 
Now, I've got a string "action" equal  to "drive-to". I want to do 
Car/action but that does not work (I can understand why), but is 
there any workaround ?

>> c: context [v: 1 f: does [print v]]
>> do in c 'f
1

>> do in c to-word "f"
1

>> c/('f)
1

>> s: "f" c/(to-word s)
1

LLVM - isn't it just virtual machine?

Oldes: sorry, it was diner time for me: thank you !

Oldes: can you explain the last one ? It's sort of voodoo to me.

The smallest LLVM binaries download is 14MB? Ouch :-)

use "action" instead of 's.. the function name is word so you have 
to use word to access it.

I'm not sure what you want to do.. maybe there is some better method 
then using objects.

Oldes: ok, that's very clear and it works fine for me. (and no, I 
really need to use thoses objects).

You can also use shortcut for the method of the object:
>> c: context [v: 1 f: func[i] [print v: v + i]]
>> ff: get in c 'f
>> ff 2
3
>> ff 2
5

(I never used such a code before:)

Nice, really: so many ways to do this!

IN is a nice way to tell whether a specific word exists in an object:

if in word 'foo ['bar]

Henrik: yes, in seems really helpful.