Programming - the withdrawal of sprites.
Open letter
for coders
m Editorial
Traditional note: the views of the writer and editors can
not coincide. ;-)
*
(C) Spencer Winset
Hello, readers!
I hope that you at least a little chop in the codes and
certainly not I dream that you love to take strokes.
In fact, I encourage you to help in the codes, namely, it will
the banality of the withdrawal of so-called sprites. IN
EX-USSR, of course, professionals in this field rife. Well,
okay, after much speculation and fast "Krakow" (?) branded games
I have not seen the expected diversity of algorithms output,
although closer to the October 1987 trend of avoiding Komad
type: LDIR, LDDR, LDD and LDI, however, certain facts are
manifestations of these teams still occur (after all, they are
automatic).
In the nineties progress is evident: 7 LD A, (DE)
7 XOR (HL)
7 LD (DE), A
4 INC E
4 INC L
-------- TOTAL: 29 cycles per byte.
And finally, on the threshold of the second
Goals no longer afraid
use a "stack": 10 POP DE
7 LD A, (HL)
4 XOR E
7 LD (HL), A
4 INC L
7 LD A, (HL)
4 XOR D
7 LD (HL), A
4 INC L
-------- TOTAL: 54 / 2 = 27 cycles per byte.
As can be seen, the sprite without a mask and arbitrary size
- as they say, the poet's dream. And in all seriousness, who
predlozhet conceptually new and faster algorithm for removing
the sprite, write, but I've had a better bottle of tasty cold
beer!
The text is a consequence of the lack of more accessible
sources of information about the current programming on the
Spectrum assembly language. Many (especially beginners), there
are such problems, some broken and abandoned, but most sit down
hard. (In the Diamond group, REAL on "emmulyatore" sitting
exactly the same and FIL / ANTARES, and yet a lot of people,
and a very long time).
Personally: Roman Petrov / Star goup / RDS / RPSG, if you are
able, write that the project "_Scorched Earth_", which is much
better than "Tank War". Coincidence and the fact long ago
noted: Project Diamond group "_FOUR RASCALS_", is also better
than "Tank War" all ethical and moral directions. Action -
needed by all!
Once I have ventilated air to create a library of algorithms
and the various procedures developed over the past century, but
no enthusiasm has been noted. What is it - self-interest? "No,
I think "green" in our sandbox almost did not come their
attraction for light multimedia monitors, leaving only
Dinosaurs coding, domestic bison demostroeniya, Hints which are
not needed. Do not exist encoders middle class: or You do not
know anything, or do you know (know how) all, in both cases is
usually not do anything you want. And the truth - and have fun,
and the library has helped, would have all seven novice RST,
faster to do the first steps to new projects that will not let
spektrumistam 90 bored in retirement vacation.
P.S. And maybe that coder was "thinking"
he must himself to reinvent the wheel.
Spencer Winset / Diamond group
ZXNet: 500:95 / 550.8
*
Other articles:
|
|
|
|
Programming - the withdrawal of sprites.
|
|
|
|
|
|
|
