Simple Sine

Implementing sine function, is the very primary and simple assignment.Here I used Tkinter interface for GUI, cause it takes very few lines to demonstrate/show the requirements.I used math library and small lines are drawn to form curve.




Complete code will be like this,

from Tkinter import *
import math
PrevX = 0
PrevY = 150


## Created a small segment of 1.0 length

def point(x,y):
return(x-0.5,y-0.5,x+0.5,y+0.5)

## Create Canvas Window and draw base line markups

root = Tk()
root.title("SinWave")
canvas = Canvas(width=400,height=300,bg='white')
canvas.create_line(0,150,400,150,fill='red')
canvas.create_text(10,160,text='0')
canvas.create_text(100,160,text='90')
canvas.create_text(200,160,text='180')
canvas.create_text(300,160,text='270')
canvas.create_text(30,290,text='SinWave')


## Implement core logic

for i in range(0,1000):
x = ((i*400)/100)
y = -(math.sin(math.pi*2*i/100)*100)+152
canvas.create_line(PrevX,PrevY,x,y,fill='blue')
PrevX=x
PrevY=y

canvas.pack()
mainloop()

following is just more interesting ..





Here is another for loop with some changes, X multiplication factor is decreased and combined result is two sine waves, code will be something like this,

for i in range(0,1000):
x = (i*400)/100
y = (math.sin(math.pi*2*i/100)*100)+148
canvas.create_line(PrevX,PrevY,x,y,fill='green')
PrevX=x
PrevY=y

PrevX = 0
PrevY = 150
for i in range(0,1000):
x = (i*200)/100
y = (math.sin(math.pi*2*i/100)*50)+148
canvas.create_line(PrevX,PrevY,x,y,fill='green')
PrevX=x
PrevY=y