How CAN i draw the symbol "om" in python

**bvdet** · Feb 14 '10, 03:45 PM

You have posted a very vague question without showing any effort to solve the problem for yourself. I can give you an answer, but I won't write the code for you.

Create a Tkinter canvas.
Draw a polygon or a series polygons with fill

I attached an example of a canvas with a filled polygon.

Attached Files

Tkinter_canvas_polygon_sm.jpg (13.2 KB, 1367 views)

**abhishek07** · Mar 1 '10, 10:15 AM

i still cant do this...please help me... ihave tried a lot

please help me someone

**bvdet** · Mar 1 '10, 01:26 PM

abhishek07,

I would suggest laying out a grid, say 200x200, over the symbol and record Cartesian points at the vertices and along arcs to approximate the symbol. After that, you can create the filled polygons on a Tkinter canvas. Here's a basic example of creating a Tkinter canvas with filled polygons.

Code:

import random
from Tkinter import *

class Pt(object):

    def __init__(self, x=0.0, y=0.0):
        self.x = float(x)
        self.y = float(y)

    def __add__(self, other):
        return Pt(self.x+other.x, self.y+other.y)

    def __sub__(self, other):
        return Pt(self.x-other.x, self.y-other.y)

    def __mul__(self, f):
        return Pt(self.x*f, self.y*f)

    def __div__(self, f):
        return Pt(self.x/f, self.y/f)

    def ray(self, limit):
        return self, Pt(limit, self.y)

    def __iter__(self):
        for a in [self.x, self.y]:
            yield a

    def __str__(self):
        return 'Pt(%0.4f, %0.4f)' % (self.x,self.y)

    def __repr__(self):
        return 'Pt(%0.4f, %0.4f)' % (self.x,self.y)

if __name__ == '__main__':
    limit = 400    
    pt1 = Pt(random.choice(range(0,limit)), random.choice(range(0,limit)))
    polygon = [Pt(280,380),
               Pt(360,20),
               Pt(100,34),
               Pt(30,5),
               Pt(19,240)]

    root = Tk()
    w = Canvas(root, width=limit+10, height=limit+10)
    w.create_rectangle(0,0,limit+10,limit+10,fill="#444444444")
    expandPts = []
    for pt in polygon:
        expandPts.append(pt.x)
        expandPts.append(pt.y)
    # draw closed polygon
    polyID = w.create_polygon(*expandPts)
    w.itemconfig(polyID, fill="#fff000000",
                 activefill="#000000fff",
                 outline="#000000000",
                 width=1)
    
    # draw ray from random point
    w.create_line(pt1.x, pt1.y,
                  pt1.ray(limit+10)[1].x,
                  pt1.ray(limit+10)[1].y,
                  fill="#ff0",width=2,
                  activefill='#0f0')
    # create a blip
    w.create_line(pt1.x-4, pt1.y-4,
                  pt1.x+4, pt1.y+4,
                  fill="#ffffff",width=2)
    w.create_line(pt1.x-4, pt1.y+4,
                  pt1.x+4, pt1.y-4,
                  fill="#ffffff",width=2)
    w.pack()
    root.mainloop()

**bvdet** · Mar 1 '10, 02:18 PM

What the heck - This version is interactive. Left click to select points on the canvas. Right click to draw a polygon and a horizontal ray beginning at a randomly selected point.

Code:

import random
from Tkinter import *

class Pt(object):

    def __init__(self, x=0.0, y=0.0):
        self.x = float(x)
        self.y = float(y)

    def __add__(self, other):
        return Pt(self.x+other.x, self.y+other.y)

    def __sub__(self, other):
        return Pt(self.x-other.x, self.y-other.y)

    def __mul__(self, f):
        return Pt(self.x*f, self.y*f)

    def __div__(self, f):
        return Pt(self.x/f, self.y/f)

    def ray(self, limit):
        return self, Pt(limit, self.y)

    def __iter__(self):
        for a in [self.x, self.y]:
            yield a

    def __str__(self):
        return 'Pt(%0.4f, %0.4f)' % (self.x,self.y)

    def __repr__(self):
        return 'Pt(%0.4f, %0.4f)' % (self.x,self.y)

if __name__ == '__main__':
    limit = 400
    ptList = []
    def draw_blip(pt, size):
        # create a blip
        w.create_line(pt.x-size, pt.y-size,
                      pt.x+size, pt.y+size,
                      fill="#ffffff",width=2)
        w.create_line(pt.x-size, pt.y+size,
                      pt.x+size, pt.y-size,
                      fill="#ffffff",width=2)
        
    def addPts(event):
        ptList.append(Pt(event.x, event.y))
        draw_blip(Pt(event.x, event.y), 1)
    def finish(event):
        event.widget.unbind("<ButtonRelease-1>")
        event.widget.unbind("<ButtonRelease-3>")
        pt1 = Pt(random.choice(range(0,limit)), random.choice(range(0,limit)))
        expandPts = []
        for pt in ptList:
            expandPts.append(pt.x)
            expandPts.append(pt.y)
        # draw closed polygon
        polyID = w.create_polygon(*expandPts)
        w.itemconfig(polyID, fill="#fff000000",
                     activefill="#000000fff",
                     outline="#000000000",
                     width=1)
        
        # draw ray from random point
        w.create_line(pt1.x, pt1.y,
                      pt1.ray(limit+10)[1].x,
                      pt1.ray(limit+10)[1].y,
                      fill="#ff0",width=2,
                      activefill='#0f0')
        draw_blip(pt1, 4)

    root = Tk()
    w = Canvas(root, width=limit+10, height=limit+10)
    w.bind("<ButtonRelease-1>", addPts)
    w.bind("<ButtonRelease-3>", finish, "+")
    w.create_rectangle(0,0,limit+10,limit+10,fill="#666")
    w.pack()
    root.mainloop()

How CAN i draw the symbol "om" in python

How CAN i draw the symbol "om" in python

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