#logScalePaper.py
#log10 scale graph paper

import math 
from ezgraphics import GraphicsWindow

width = int(input("Enter width of graphics window: "))
height = int(input("Enter height of graphics window: "))
horizontals = int(input("Enter #divisions/units X horizontally: "))
verticals = int(input("Enter # LOG divisions/units Y vertically: "))

win = GraphicsWindow(width,height)
canvas = win.canvas()

x_gap = width / horizontals
for i in range(horizontals):
    canvas.drawLine(x_gap*i,0, x_gap*i,height)   #vertical lines

y_gap = height / verticals
for i in range(verticals):
    canvas.setLineWidth(2)
    canvas.drawLine(0,height-(y_gap*i), width,height-(y_gap*i))    #horizontal lines
    canvas.setLineWidth(1)
    for j in range(2,10):
        log_j = math.log10(j) * y_gap
        canvas.drawLine(0,height-(y_gap*i+log_j), width,height-(y_gap*i+log_j))

canvas.setLineWidth(2)
canvas.drawLine(0,height-1, width,height-1)    #kludge: base horizontal line

print("Look at the graphics window")