# $Id: 954dbe2 on Mon Mar 25 13:11:26 2013 +0100 by Benedict Verhegghe $
##
##  This file is part of pyFormex 0.9.1  (Tue Oct 15 21:05:25 CEST 2013)
##  pyFormex is a tool for generating, manipulating and transforming 3D
##  geometrical models by sequences of mathematical operations.
##  Home page: http://pyformex.org
##  Project page:  http://savannah.nongnu.org/projects/pyformex/
##  Copyright 2004-2013 (C) Benedict Verhegghe (benedict.verhegghe@ugent.be)
##  Distributed under the GNU General Public License version 3 or later.
##
##  This program is free software: you can redistribute it and/or modify
##  it under the terms of the GNU General Public License as published by
##  the Free Software Foundation, either version 3 of the License, or
##  (at your option) any later version.
##
##  This program is distributed in the hope that it will be useful,
##  but WITHOUT ANY WARRANTY; without even the implied warranty of
##  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
##  GNU General Public License for more details.
##
##  You should have received a copy of the GNU General Public License
##  along with this program.  If not, see http://www.gnu.org/licenses/.
##
"""Viewports.py

Demonstrate multiple viewports.
"""
from __future__ import print_function
_status = 'checked'
_level = 'advanced'
_topics = ['surface']
_techniques = ['viewport', 'color']

from gui.draw import *
def atExit():
    print("EXITING")
    layout(1)
    reset()

def run():
    reset()
    smoothwire()
    
    nsl = 0
    F = Formex.read(getcfg('datadir')+'/horse.pgf')

    layout(1)
    FA = draw(F,view='front')
    drawText('Viewport 0',20,20,size=20)

    pause(msg='NEXT: Create Viewport 1')
    layout(2)
    drawText('Viewport 1',20,20,size=20)
    pf.GUI.viewports.updateAll()

    pause(msg='NEXT: Create Viewport 2 and draw in green')
    layout(3)
    draw(F,color='green')

    pause(msg='NEXT: Link Viewport 2 to Viewport 0')

    linkViewport(2,0)
    pf.GUI.viewports.updateAll()

    pause(msg='NEXT: Create 4 Viewports all linked to Viewport 0')

    layout(4,2)
    viewport(0)
    for i in range(1,4):
        linkViewport(i,0)

    pause(msg='NEXT: Change background colors in the viewports')

    colors=['indianred','olive','coral','yellow']

    for i,v in enumerate(['front','right','top','iso']):
        viewport(i)
        view(v)
        bgcolor(colors[i])

    pause(msg='NEXT: Cut the horse in viewport 3, notice results visible in all')

    viewport(3)
    G = F.cutWithPlane([0.,0.,0.],[-1.,0.,0.],side='+')
    clear()
    draw(G) # this draws in the 4 viewports !
    pf.GUI.viewports.updateAll()

    pause(msg='NEXT: DONE')


if __name__ == 'draw':
    run()
# End
