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The time now is Fri 26 Feb 2021, 02:34
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 Forum index » Off-Topic Area » Programming
fig 2.9 in tahr
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learnhow2code

Joined: 12 Jun 2016
Posts: 1015
PostPosted: Tue 14 Jun 2016, 01:49    Post subject:  fig 2.9 in tahr  
so ive been running tahr and it has python 2 already installed. that means i can run fig 2.9 in it.

what is fig 2.9? a compiler i wrote that translates from a language called "fig" to python.

here is a fig program:

Code:
#text mode:
#### license: creative commons cc0 1.0 (public domain)
#### http://creativecommons.org/publicdomain/zero/1.0/
now display
function circle x y r c
    cr r  int  plus 1
    p -3.14159
    try
        rcpr 1 divby r
    except
        rcpr .005
    resume
    while
        now p plus rcpr swap now p
        ifmore p 3.14159
            break
            fig
        cosx p  cos  times cr  plus x  int
        siny p  sin  times cr  plus y  int
        now     pset cosx siny c
        wend
    fig
x
y
r
c
xf = 1 
yf = 1 
rf = .5 
cf = 1
try
    while
        now circle (x, y), r, c : sleep .01
python
    x = x + xf ; y = y + yf ; c = c + cf ; r = r + rf
    if x < 1:    xf = 1
    if x > 638/2:  xf = -1
    if y < 1:    yf = 1
    if y > 477/2:  yf = -1
    if c < 1:    cf = 1
    if c > 14:   cf = -1
    if r < 1:    rf = .5
    if r > 200/4:  rf = -.5
    fig
        wend
except
    now colortext 7 : highlight 0 : cls : system : end
    resume


here is how to install fig29:

* tar -xvf fig.tar
* copy the file fig29 to /usr/bin
* chmod +x /usr/bin/fig29

here is how to use fig:

Code:
# at the command line:
fig circles.fig
# (fig translates the file to circles.fig.py)
./circles.fig.py


fig29 is attached to this post.

translator is public domain and requires no other files than the ones tahr provides.

docs (public domain) and example scripts (also public domain) are available if anyone is interested.
fig.tar
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learnhow2code

Joined: 12 Jun 2016
Posts: 1015
PostPosted: Tue 14 Jun 2016, 02:02    Post subject:  
attached is the circles program running in a term
circles.png
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 Filesize   114.84 KB
 Viewed   152 Time(s)

circles.png
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