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Launch rocket with countdown and acceleration in stdout (view source)

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{{draft task}}
{{draft task|Launch rocket with countdown and acceleration in stdout}}
 
;Task Description:
Simulate the countdown of a rocket launch from   '''5'''   down to   '''0'''   seconds,   and then display the moving, accelerating rocket on the standard output device as a simple ASCII art animation.
<br><br>
 
=={{header|8080 Assembly}}==
The task is to simulate the countdown of a rocket launch from 5 down to 0 seconds and then display the moving, accelerating rocket on the standard output device as a simple ASCII art animation.
 
This program runs under CP/M. It assumes a terminal that understands the
ASCII CR, LF, and FF control codes (in practice this will be all of them).
If your machine has blinkenlights (e.g. an Altair 8800), the top half of the address bus
will additionally show a countdown going from 5 to 0 lights.
 
The 8080 is assumed to be clocked at 2 Mhz, which was the rated maximum
for the earlier chips. If you overclock your Altair, or run this program on a later Z80-based machine,
the countdown will go faster. In a non-cycle-accurate emulator, the program will run in an instant.
In SIMH, the command <code>d clock 2000</code> might help.
 
<syntaxhighlight lang="8080asm"> org 100h
lxi d,rocket ; Clear screen and print rocket
mvi c,9
call 5
mvi a,0F8h ; Five lights
lxi h,number
cdwn: lxi d,count ; Print countdown
call sout
call sec ; Wait a second
dcr m ; Decrease number
add a ; Turn off a light
jnz cdwn ; Again (if not zero yet)
lxi d,flame ; Print flame
call sout
mvi c,24 ; Lines
lxi h,20000 ; Liftoff timer
lift: lxi d,newln
call sout
call waithl
lxi d,-800
dad d
dcr c
jnz lift
ret
sout: push psw ; Print string [DE] preserving registers
push b
push h
mvi c,9
call 5
jmp rsto
;;; Busy wait counting down HL.
;;; 52 + 24*HL cycles = 26 + 12*HL nanoseconds
waithl: push psw ; 11 cycles
push h ; 11 cycles
spin: dcx h ; 5 cycles ----
mov a,h ; 5 cycles
ora l ; 4 cycles loop
jnz spin ; 10 cycles ----
pop h ; 10 cycles
pop psw ; 10 cycles
ret ; 10 cycles
;;; Busy wait approximately one second (assuming 2Mhz clock)
;;; Pattern in A on address bus (will appear on blinkenlights
;;; if there are any).
sec: push psw
push b
push h
mov b,a ; Set up for pattern
lxi h,25000 ; 25.000 * 80 = 2.000.000 cycles ~= 1 sec
swait: ldax b ; 56 cycles, and hold pattern on blinkenlights
ldax b ; ...
ldax b
ldax b
ldax b
ldax b
ldax b
ldax b
dcx h ; 5 cycles
mov a,h ; 5 cycles
ora l ; 4 cycles
jnz swait ; 10 cycles
rsto: pop h
pop b
pop psw
ret
;;; Rocket
rocket: db 12, 10,10,10,10,10, 10,10,10,10,10
db ' |',13,10
db ' / ',92,13,10
db ' / _ ',92,13,10
db ' |.o ',39,'.|',13,10
db ' |',39,'._.',39,'|',13,10
db ' | |',13,10
db ' ,',39,'| | |`.',13,10
db ' / | | | ',92,13,10
db ' |,-',39,'--|--',39,'-.|' ,13,10,'$'
flame: db ' ******* ',13,10
db ' .*****.',13,10
db ' .***.',13,10
db ' .*.',13,10
db ' .',13,10,'$'
count: db ' _____ '
number: db '5 _____',13,'$'
newln: db 13,10,'$'</syntaxhighlight>
 
=={{header|FreeBASIC}}==
<syntaxhighlight lang="freebasic">#define sky 32
dim as string rocket(1 to 7) = { " ^",_
" / " + chr(92),_
" | |",_
" | H |",_
" | |",_
" /|/ \|" + chr(92),_
"/_||.||_" + chr(92) }
 
dim as double h = 0, dhdt = 0, d2hdt2 = 0.3, t, countdown = 5, dt
dim as integer ih, j, cut, lines
cls
while countdown > 0
t = timer
print countdown,
while timer < t + 1
wend
countdown -= 1
wend
cls
 
while h < sky
lines = 0
t = timer
ih = int(h)
for j = 1 to sky - 7 - h
lines += 1
print
next j
if ih < sky - 7 then cut = 6 else cut = sky - ih - 1
for j = 7-cut to 7
lines += 1
print rocket(j)
next j
for j = sky-ih+1 to sky
lines += 1
print " *** "
next j
if lines < sky then print " ***"
print "-------------------"
h += dhdt * dt
dhdt += d2hdt2 * dt
while t + 1./30 > timer
wend
cls
dt = timer - t
wend</syntaxhighlight>
 
=={{header|Go}}==
Line 12 ⟶ 155:
<br>
...though my rocket is a bit fancier :)
<langsyntaxhighlight lang="go">package main
 
import (
Line 65 ⟶ 208:
}
}
}</langsyntaxhighlight>
 
=={{header|Julia}}==
<langsyntaxhighlight lang="julia">rocket() = println(" /..\\\n |==|\n | |\n | |\n",
" | |\n /____\\\n | |\n |SATU|\n | |\n",
" | |\n /| | |\\\n / | | | \\\n /__|_|__|__\\\n /_\\/_\\\n")
Line 91 ⟶ 234:
 
testrocket()
</langsyntaxhighlight>{{out}}
<pre>
Countdown...T minus 5... 4... 3...
Line 109 ⟶ 252:
/_\/_\
</pre>
 
=={{header|Nim}}==
{{trans|Julia}}
Using <code>terminal</code> module from standard library rather the escape codes.
<syntaxhighlight lang="nim">import os, math, terminal
 
proc rocket() =
echo " /..\\\n |==|\n | |\n | |\n",
" | |\n /____\\\n | |\n |SATU|\n | |\n",
" | |\n /| | |\\\n / | | | \\\n /__|_|__|__\\\n /_\\/_\\\n"
 
proc exhaust() =
echo " *****"
 
proc countDown(secs: Natural) =
stdout.write "Countdown...T minus "
stdout.flushFile
for i in countdown(secs, 1):
stdout.write i, "... "
stdout.flushFile
os.sleep(1000)
stdout.write "LIFTOFF!"
stdout.flushFile
 
proc engineBurn(rows: Natural) =
echo '\n'
for i in 1..rows:
exhaust()
sleep (0.9^i * 1000).toInt
 
proc testRocket() =
eraseScreen()
rocket()
cursorUp(16)
countDown(5)
cursorDown(13)
engineBurn(30)
 
testRocket()</syntaxhighlight>
 
{{out}}
Same as Julia program output.
 
=={{header|Pascal}}==
Pascal includes the standard routine <tt>page</tt>.
However its specific behavior is implementation-defined, i. e. up to the compiler vendor.
''An'' implementation of <tt>page</tt> ''could'', for instance, translate into <tt>\014</tt> (ASCII form feed) or <tt>\033[2J\033[H</tt>, the ANSI escape sequence blanking the entire screen and moving the cursor to the upper left-hand corner.
If the terminal interprets them properly, the following <tt>program</tt> could satisfy the task’s requirements:
<syntaxhighlight lang="pascal">program launchRocketWithCountdownAndAccelerationOnOutput(output);
 
const
screenWidth = 80;
 
type
wholeNumber = 0..maxInt;
natural = 1..maxInt;
 
var
n: wholeNumber;
 
{
Pascal, as defined by ISO standard 7185, does not provide any
facilities to time actions. Nevertheless, most compiler vendors
invented their own `sleep` or `delay` procedures.
}
procedure sleep(n: natural);
begin
{ Yes, in Pascal an empty statement is valid. }
{ There is really nothing after `do`. }
for n := n downto 1 do
end;
 
procedure drawRocket(column: natural);
begin
{ `page` is shorthand for `page(output)`, }
{ as is `writeLn(…)` shorthand for `writeLn(output, …)`. }
page;
{ It should be an easy feat to adapt this to contain ASCII only. }
writeLn(' ':column, '🙮')
end;
 
{ === MAIN ============================================================= }
begin
for n := 5 downto 0 do
begin
drawRocket(1);
writeLn;
writeLn(n);
sleep(5318008)
end;
n := 1;
while n < screenWidth do
begin
n := round(n * 1.5);
sleep(58008);
drawRocket(n)
end
end.</syntaxhighlight>Note, conventionally main engines (liquid fuel) are ignited a few seconds prior liftoff and SRBs are ignited just at/before liftoff, so the graphical depiction of exhaust visible at T−5 is ''about'' accurate.
 
=={{header|Perl}}==
{{trans|Perl 6Raku}}
<langsyntaxhighlight lang="perl">use strict;
use warnings;
use Time::HiRes qw(sleep);
Line 185 ⟶ 427:
 
# clean up on exit, reset ANSI codes, scroll, re-show the cursor & clear screen
sub clean_up { print "\e[0m", ("\n")x50, "\e[H\e[J\e[?25h"; exit(0) }</langsyntaxhighlight>
 
=={{header|Perl 6Phix}}==
<!--<syntaxhighlight lang="phix">-->
<span style="color: #004080;">sequence</span> <span style="color: #000000;">rocket</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">split</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"""
/\
/ \
| |
| |
/|/\|\
/_||||_\
"""</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"\n"</span><span style="color: #0000FF;">)</span>
<span style="color: #004080;">integer</span> <span style="color: #000000;">lines</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">0</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">l</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">0</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">t</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">10</span>
<span style="color: #004080;">atom</span> <span style="color: #000000;">s</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">0.25</span>
<span style="color: #008080;">while</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">rocket</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">do</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">t</span><span style="color: #0000FF;">></span><span style="color: #000000;">0</span> <span style="color: #008080;">then</span>
<span style="color: #000000;">rocket</span><span style="color: #0000FF;">[$]</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">sprintf</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"T minus %d... "</span><span style="color: #0000FF;">,</span><span style="color: #000000;">t</span><span style="color: #0000FF;">)</span>
<span style="color: #000080;font-style:italic;">-- allow console resize during countdown:</span>
<span style="color: #000000;">lines</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">video_config</span><span style="color: #0000FF;">()[</span><span style="color: #004600;">VC_SCRNLINES</span><span style="color: #0000FF;">]</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">l</span><span style="color: #0000FF;">!=</span><span style="color: #000000;">lines</span><span style="color: #0000FF;">-</span><span style="color: #000000;">7</span> <span style="color: #008080;">then</span> <span style="color: #000000;">l</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">0</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">else</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">l</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span> <span style="color: #008080;">then</span>
<span style="color: #000000;">rocket</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">rocket</span><span style="color: #0000FF;">[</span><span style="color: #000000;">2</span><span style="color: #0000FF;">..$]</span>
<span style="color: #008080;">else</span>
<span style="color: #000000;">l</span> <span style="color: #0000FF;">-=</span> <span style="color: #0000FF;">(</span><span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">rocket</span><span style="color: #0000FF;">)></span><span style="color: #000000;">6</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">if</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">rocket</span><span style="color: #0000FF;">)<</span><span style="color: #000000;">12</span> <span style="color: #008080;">then</span>
<span style="color: #000000;">rocket</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">append</span><span style="color: #0000FF;">(</span><span style="color: #000000;">rocket</span><span style="color: #0000FF;">,</span><span style="color: #008000;">" ** "</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">elsif</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">rocket</span><span style="color: #0000FF;">)=</span><span style="color: #000000;">12</span> <span style="color: #008080;">then</span>
<span style="color: #000000;">rocket</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">append</span><span style="color: #0000FF;">(</span><span style="color: #000000;">rocket</span><span style="color: #0000FF;">,</span><span style="color: #008000;">" "</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #000000;">s</span> <span style="color: #0000FF;">*=</span> <span style="color: #000000;">0.95</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">l</span><span style="color: #0000FF;">=</span><span style="color: #000000;">0</span> <span style="color: #008080;">then</span>
<span style="color: #7060A8;">clear_screen</span><span style="color: #0000FF;">()</span>
<span style="color: #7060A8;">cursor</span><span style="color: #0000FF;">(</span><span style="color: #004600;">NO_CURSOR</span><span style="color: #0000FF;">)</span>
<span style="color: #000000;">l</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">lines</span><span style="color: #0000FF;">-</span><span style="color: #000000;">7</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #7060A8;">position</span><span style="color: #0000FF;">(</span><span style="color: #000000;">l</span><span style="color: #0000FF;">,</span><span style="color: #000000;">1</span><span style="color: #0000FF;">)</span>
<span style="color: #7060A8;">puts</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #7060A8;">join</span><span style="color: #0000FF;">(</span><span style="color: #000000;">rocket</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"\n"</span><span style="color: #0000FF;">))</span>
<span style="color: #7060A8;">sleep</span><span style="color: #0000FF;">(</span><span style="color: #000000;">s</span><span style="color: #0000FF;">)</span>
<span style="color: #000000;">t</span> <span style="color: #0000FF;">-=</span> <span style="color: #000000;">1</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">t</span><span style="color: #0000FF;">=</span><span style="color: #000000;">0</span> <span style="color: #008080;">then</span> <span style="color: #000000;">rocket</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">rocket</span><span style="color: #0000FF;">[</span><span style="color: #000000;">1</span><span style="color: #0000FF;">..$-</span><span style="color: #000000;">1</span><span style="color: #0000FF;">]</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">while</span>
<span style="color: #7060A8;">cursor</span><span style="color: #0000FF;">(</span><span style="color: #004600;">BLOCK_CURSOR</span><span style="color: #0000FF;">)</span>
<!--</syntaxhighlight>-->
 
=={{header|Racket}}==
 
{{trans|Go}}
 
<syntaxhighlight lang="racket">#lang racket
 
(define rocket #<<EOF
/\
( )
( )
/|/\|\
/_||||_\
EOF
)
 
(define (cls) (displayln "\x1B[2J"))
 
(define (print-rocket n)
(displayln rocket)
(for ([i (in-range n)]) (displayln "")))
 
(for ([i (in-range 5 0 -1)])
(cls)
(printf "~a =>\n" i)
(print-rocket 0)
(sleep 1))
 
(cls)
(printf "Liftoff!\n")
(print-rocket 1)
(sleep 1)
 
(for/fold ([ms 1000] #:result (void)) ([n (in-range 2 100)])
(cls)
(print-rocket n)
(sleep (/ ms 1000))
(if (>= ms 40) (- ms 40) 0))</syntaxhighlight>
 
=={{header|Raku}}==
(formerly Perl 6)
{{works with|Rakudo|2019.07.1}}
Uses ANSI graphics. Works best in a 24 bit ANSI terminal at least 80x24, though bigger is better.
Line 195 ⟶ 523:
The motion is a little "notchy" as the vertical resolution in a terminal is rather low. Exits after the rocket leaves the visible area of the terminal. See the [https://github.com/thundergnat/rc/blob/master/img/rocket-perl6.gif example animated gif]
 
<syntaxhighlight lang="raku" perl6line>signal(SIGINT).tap: { cleanup() }
 
my ($rows,$cols) = qx/stty size/.words;
Line 262 ⟶ 590:
 
# clean up on exit, reset ANSI codes, scroll, re-show the cursor & clear screen
sub cleanup () { print "\e[0m", "\n" xx 50, "\e[H\e[J\e[?25h"; exit(0) }</langsyntaxhighlight>
 
{{out|Sample output}}
See [https://github.com/thundergnat/rc/blob/master/img/rocket-perl6.gif rocket-perl6.gif] (offsite animated gif image)
 
=={{header|Phix}}==
<lang Phix>sequence rocket = split("""
/\
/ \
| |
| |
/|/\|\
/_||||_\
""","\n")
 
integer lines = 0, l = 0, t = 5
atom s = 1
 
while length(rocket) do
if t>0 then
rocket[$] = sprintf("T minus %d...",t)
-- allow console resize during countdown:
lines = video_config()[VC_SCRNLINES]
if l!=lines-7 then l = 0 end if
else
if l=1 then
rocket = rocket[2..$]
else
l -= (length(rocket)>6)
if length(rocket)<12 then
rocket = append(rocket," ** ")
elsif length(rocket)=12 then
rocket = append(rocket," ")
end if
end if
s = s*0.95
end if
if l=0 then
clear_screen()
cursor(NO_CURSOR)
l = lines-7
end if
position(l,1)
puts(1,join(rocket,"\n"))
sleep(s)
t -= 1
if t=0 then rocket = rocket[1..$-1] end if
end while
cursor(BLOCK_CURSOR)</lang>
 
=={{header|Racket}}==
 
{{trans|Go}}
 
<lang racket>#lang racket
 
(define rocket #<<EOF
/\
( )
( )
/|/\|\
/_||||_\
EOF
)
 
(define (cls) (displayln "\x1B[2J"))
 
(define (print-rocket n)
(displayln rocket)
(for ([i (in-range n)]) (displayln "")))
 
(for ([i (in-range 5 0 -1)])
(cls)
(printf "~a =>\n" i)
(print-rocket 0)
(sleep 1))
 
(cls)
(printf "Liftoff!\n")
(print-rocket 1)
(sleep 1)
 
(for/fold ([ms 1000] #:result (void)) ([n (in-range 2 100)])
(cls)
(print-rocket n)
(sleep (/ ms 1000))
(if (>= ms 40) (- ms 40) 0))</lang>
 
=={{header|REXX}}==
This REXX program hard-codes the name of the (OS) command to clear the terminal screen &nbsp; ('''CLS''').
<langsyntaxhighlight lang="rexx">/*REXX pgm does a countdown and then display the launching of a rocket (ASCII animation)*/
parse arg cntDown . /*obtain optional argument from the CL.*/
if cntDown=='' | cntDown=="," then cntDown= 5 /*Not specified? Then use the default.*/
Line 392 ⟶ 637:
/*──────────────────────────────────────────────────────────────────────────────────────*/
sky: do air; say; end /*air*/; return /*display the sky above the rocket. */
rocket: do ship=1 for rs; say left('', sw%2 - 5) @.ship; end /*ship*/; return</langsyntaxhighlight>
This REXX program makes use of &nbsp; '''SCRSIZE''' &nbsp; REXX program (or
BIF) which is used to determine the screen
Line 402 ⟶ 647:
 
=={{header|Rust}}==
<langsyntaxhighlight lang="rust">
use std::{thread, time};
 
Line 446 ⟶ 691:
}
 
</syntaxhighlight>
</lang>
 
=={{header|Wren}}==
{{trans|Go}}
<syntaxhighlight lang="wren">import "timer" for Timer
 
var rocket = "
/\\
( )
( )
/|/\\|\\
/_||||_\\
"
 
var printRocket = Fn.new { |above|
System.write(rocket)
if (above == 0) return
for (i in 1..above) System.print(" ||")
}
 
var cls = Fn.new { System.write("\x1B[2J") }
 
// counting
for (n in 5..1) {
cls.call()
System.print("%(n) =>")
printRocket.call(0)
Timer.sleep(1000)
}
 
// ignition
cls.call()
System.print("Lifetoff !")
printRocket.call(1)
Timer.sleep(1000)
 
// liftoff
var ms = 1000
for (n in 2..99) {
cls.call()
printRocket.call(n)
Timer.sleep(ms)
ms = (ms >= 40) ? ms - 40 : 0
}</syntaxhighlight>
 
=={{header|zkl}}==
{{trans|Go}}
Uses ANSI terminal codes.
<langsyntaxhighlight lang="zkl">var [const] rocket=
#<<<
0'~
Line 482 ⟶ 770:
ms=(ms - 0.04).max(0); // 40 milliseconds faster than last time
}
}</langsyntaxhighlight>
{{out}}
<pre>
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