#!/usr/bin/python
from Tkinter import *
import math
import random

# Draw a globe...

def AltAzToXYZ(alt, az):
    altrad= (3.14159/180.0)* -alt
    azrad= (3.14159/180.0)* -az
    x= math.sin(azrad)*  abs(math.cos(altrad))
    y= math.sin(altrad)
    z= math.cos(azrad)*  abs(math.cos(altrad))
    #print '(%i, %i)-> (%i, %i, %i)' % (alt, az, x, y, z)
    return [x,y,z]

def MultByRad(xyz, rad):
    xyz[0]= xyz[0]* rad
    xyz[1]= xyz[1]* rad
    xyz[2]= xyz[2]* rad

rotbyd= 15
rotbyr= rotbyd* 3.14159/180
cosine= math.cos(rotbyr);  sine= math.sin(rotbyr)

def Rotate1(pt):
    x= pt[0]; y= pt[1]
    x2= (x*cosine) + (y*sine)
    y2= -(x*sine) + (y*cosine)
    pt[0]= x2;  pt[1]= y2

def Rotate2(pt):
    x= pt[1]; y= pt[2]
    x2= (x*cosine) + (y*sine)
    y2= -(x*sine) + (y*cosine)
    pt[1]= x2;  pt[2]= y2

rad= 150.0

#-----------------------------------------------------------------------------
class App:
    def __init__(self, master):
        frame = Frame(master);   frame.pack()
        self.canvas = Canvas(frame, width=400, height=400)
        self.canvas.pack(side=TOP)
        fr2= Frame(frame);  fr2.pack(side=BOTTOM)
        bm = Button(fr2, text="Rotate1", command=self.rotate1);  bm.pack(side=LEFT)
        bm2 = Button(fr2, text="Rotate2", command=self.rotate2);  bm2.pack(side=RIGHT)
        self.lines= []
        self.draw()

    def add_parallel(self, alt, color):
        az= 0
        p0= AltAzToXYZ(alt, az)
        MultByRad(p0, rad)
        while az< 360:
            az= az+ 10
            p1= AltAzToXYZ(alt, az)
            MultByRad(p1, rad)
            self.add_line([p0, p1, color])
            p0= p1[:]
        
    def add_meridian(self, az, color):
        alt= -90
        p0= AltAzToXYZ(alt, az)
        MultByRad(p0, rad)
        while alt<= 90:
            alt= alt+ 10
            p1= AltAzToXYZ(alt, az)
            MultByRad(p1, rad)
            self.add_line([p0, p1, color])
            p0= p1[:]
        
    def draw(self):
        alt= -80
        while alt< 70:
            self.add_parallel(alt, "blue")
            alt= alt+ 10
        self.add_parallel(70, "red")
        self.add_parallel(80, "red")

        az= 20
        while az < 360:
            self.add_meridian(az, "blue")
            az= az+ 10
        self.add_meridian(0, "red")
        self.add_meridian(10, "green")
        
    def rotate1(self):
        for lineentry in self.lines:
            Rotate1(lineentry[1][0])
            Rotate1(lineentry[1][1])
            self.canvas.delete(lineentry[0])
            lineentry[0]= self.add_line1(lineentry[1])
            
    def rotate2(self):
        for lineentry in self.lines:
            Rotate2(lineentry[1][0])
            Rotate2(lineentry[1][1])
            self.canvas.delete(lineentry[0])
            lineentry[0]= self.add_line1(lineentry[1])

    def add_line1(self, line):
        rad= 150
        ls= line[0];  le=line[1];  color= line[2]
        #print '((%i, %i) (%i, %i))' % (ls[0], ls[1], le[0],le[0])
        lineobj= self.canvas.create_line(ls[0]+200, ls[1]+200,
                                le[0]+200, le[1]+200,
                                fill=color)
        return lineobj
    
    def add_line(self, line):
        lineobj= self.add_line1(line)
        lineentry= [lineobj, line] 
        self.lines.append(lineentry)

#---------------------------------------------------------------------------
root = Tk()
app  = App(root)
root.mainloop()