Archived:Sine wave interference patterns using PySymbian

Comments

(no comments yet)

Log in or Join to leave comments.

Aquivado: Este artigo foi arquivado, pois o conteúdo não é mais considerado relevante para se criar soluções comerciais atuais. Se você achar que este artigo ainda é importante, inclua o template {{ForArchiveReview|escreva a sua justificativa}}.

All PySymbian articles have been archived. PySymbian is no longer maintained by Nokia and is not guaranteed to work on more recent Symbian devices. It is not possible to submit apps to Nokia Store.

Article Metadata

---

Tested with

Devices(s): Nokia N96

---

Compatibility

Platform(s): S60 2nd Edition, S60 3rd Edition

---

Article

Keywords: canvas

Created: cyke64 (19 Mar 2007)

Last edited: hamishwillee (31 May 2013)

Overview

Following code provides a nice visualization in Python.

Code

# import modules
from appuifw import *
import e32, random
from math import *
 
# define canvas
app.body = c = Canvas()
width, height =  c.size
# random frequency
freq = random.choice([25., 50., 100., 200., 400.])
 
# Draw
for y in range(height):
    for x in range(width):
        z1 = sin(x/freq*1.7*pi)
        z2 = sin((x/3+y)/freq*1.5*pi)
        z3 = sin(y/freq*0.1*pi)
 
        z = abs(z1+z2+z3)*255
        c.point((x,y), (z,z/4,z*4))
c.text((5, height-12), u'Freq = %d' %freq, 0xffffff)
 
e32.ao_sleep(5)    # wait 5 sec then quit

Postconditions

Visual

.