/usr/share/pyshared/pymecavideo/vitesse.py is in python-mecavideo 6.1-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 | #-*- coding: utf-8 -*-
"""
vitesse.py, a module for pymecavideo:
a program to track moving points in a video frameset
Copyright (C) 2007 Jean-Baptiste Butet <ashashiwa@gmail.com>
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/>.
"""
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from math import sqrt, acos, asin, pi, cos, sin, atan2
from vecteur import vecteur
class Vitesse(QLabel):
def __init__(self, parent, point,vitesse, color, ech_v):
"""
affiche un vecteur vitesse. Les données sont :
parent : le widget dont dépend le nouveau dessin
point : un vecteur pour l'origine
vitesse : autre vecteur
color : la couleur du trait
ech_v : un flottant : échelle en pixel pour 1 m/s
"""
QLabel.__init__(self, parent)
self.color=color
self.origine=point
# règle le cas où on utilise une virgule comme symbole décimal
ech=float(ech_v.replace(",","."))
self.v=vitesse.norme()*ech
self.angle=vitesse.anglePolaire()
self.setGeometry(QRect(0,0,640,480))
def paintEvent(self,event):
if self.v!=0 : #si la vitesse est nuelle, ne l'affiche pas
self.painter = QPainter()
self.painter.begin(self)
self.painter.setPen(QColor(self.color))
p1=QPoint(0,0)
p2=QPoint(10*self.v,0)
p3=QPoint(10*self.v-15,-4)
p4=QPoint(10*self.v-15,4)
self.painter.translate(self.origine.x(), self.origine.y())
self.painter.rotate(self.angle*180/pi)
self.painter.drawPolyline(p1,p2,p3,p4,p2)
self.painter.end()
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