Morph.py

from tkinter import *

import sys

WIDTH = 400  # width of canvas
HEIGHT = 400  # height of canvas

HPSIZE = 2  # half of point size (must be integer)
CCOLOR = "#0000FF"  # blue

elementList = []  # list of elements (used by Canvas.delete(...))

polygon = [[50, 50], [350, 50], [350, 350], [50, 350], [50, 50]]

time = 0
dt = 0.01


def drawObjekts():
    """ draw polygon and points """
    # TODO: inpterpolate between polygons and render
    for (p, q) in zip(polygon, polygon[1:]):
        elementList.append(can.create_line(p[0], p[1], q[0], q[1],
                                           fill=CCOLOR))
        elementList.append(can.create_oval(p[0] - HPSIZE, p[1] - HPSIZE,
                                           p[0] + HPSIZE, p[1] + HPSIZE,
                                           fill=CCOLOR, outline=CCOLOR))


def quit(root=None):
    """ quit programm """
    if root == None:
        sys.exit(0)
    root._root().quit()
    root._root().destroy()


def draw():
    """ draw elements """
    can.delete(*elementList)
    del elementList[:]
    drawObjekts()
    can.update()


def forward():
    global time
    while (time < 1):
        time += dt
        polygon = getPoly(sys.argv[2],300)
        print(time)
        drawObjekts()
        draw()


def backward():
    global time
    while (time > 0):
        time -= dt
        polygon = getPoly(sys.argv[1], 300)
        print(time)
        drawObjekts()
        draw()

def getPoly(name,faktor=1):
    temp = open(name).read().split()

    temp = list(map(lambda x: float(x)*faktor, temp))
    temp = list(map(lambda x: list(x),list(zip(temp[0::2],temp[1::2]))))
    print(temp)

    return temp


if __name__ == "__main__":
    # check parameters
    if len(sys.argv) != 3:
        print("morph.py firstPolygon secondPolygon")

        sys.exit(-1)

    # TODOS:
    # - read in polygons
    # - transform from local into global coordinate system
    # - make both polygons contain same number of points

    polies = getPoly(sys.argv[1],300)

    polygon = polies










    # create main window
    mw = Tk()
    mw._root().wm_title("Morphing")

    # create and position canvas and buttons
    cFr = Frame(mw, width=WIDTH, height=HEIGHT, relief="sunken", bd=1)
    cFr.pack(side="top")
    can = Canvas(cFr, width=WIDTH, height=HEIGHT)
    can.pack()
    cFr = Frame(mw)
    cFr.pack(side="left")
    bClear = Button(cFr, text="backward", command=backward)
    bClear.pack(side="left")
    bClear = Button(cFr, text="forward", command=forward)
    bClear.pack(side="left")
    eFr = Frame(mw)
    eFr.pack(side="right")
    bExit = Button(eFr, text="Quit", command=(lambda root=mw: quit(root)))
    bExit.pack()
    draw()

    # start
    mw.mainloop()