MataAngin

# Mata Angin
# joe, 04/11/2015

# Ref: Nama Arah dan Derajat Mata Angin
'''
N 348.75 - 11.25
NNE 11.25 - 33.75
NE 33.75 - 56.25
ENE 56.25 - 78.75
E 78.75 - 101.25
ESE 101.25 - 123.75
SE 123.75 - 146.25
SSE 146.25 - 168.75
S 168.75 - 191.25
SSW 191.25 - 213.75
SW 213.75 - 236.25
WSW 236.25 - 258.75
W 258.75 - 281.25
WNW 281.25 - 303.75
NW 303.75 - 326.25
NNW 326.25 - 348.75
'''


import appuifw as A
import graphics as G
from math import cos,sin,pi

radians=lambda x:x*pi/180

run=1
def exit():
 global run;run=0

A.app.screen='full'
canvas=A.Canvas()
A.app.body=canvas
w,h=canvas.size
img=G.Image.new((w,h))
A.app.exit_key_handler=exit

# center x, center y
cx,cy=w/2,h/2

# radius lingkaran, 80% dari nilai terkecil antara titik tengah (lebar,tinggi)
r=min(cx,cy)*.80

# nama arah mataangin, North, North-north East, North East, dst
dirs=["N", "NNE", "NE", "ENE", "E", "ESE", "SE", "SSE", "S", "SSW", "SW", "WSW", "W", "WNW", "NW", "NNW"]

def wind():
 # offset -90, supaya 0 berada di posisi jam 12, (ingat bahwa 0 derajat dari sebuah lingkaran berada pada posisi jam 3, berputar searah jarum jam)

 off=-radians(90)

 # loop
 for i in range(N):
  # derajat per bagian, 1 lingkaran = 2 * pi
  dd=(2*pi)/N

  # x,y titik arah mata angin
  # x=cos(derajat), y=sin(derajat)
  x=cx+r*cos(dd*i+off)
  y=cy+r*sin(dd*i+off)

  img.line((cx,cy,x,y),0xdddd99)
  img.text((x,y),u'%s' %dirs[i],0x999933,'legend')

N=len(dirs)
while run:
 img.clear(0xffffdd)
 wind()
 canvas.blit(img)
 A.e32.ao_sleep(1e-04)