如何旋轉(zhuǎn)一個多邊形在python的Tkinter的畫布？

imelee 2016-12-18

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如何旋轉(zhuǎn)一個多邊形在python的Tkinter的畫布？

python 向量vector tkinter
我的工作來創(chuàng)建一個版本的Python和Tkinter的的。當(dāng)左或右箭頭鍵按下時的船舶必須旋轉(zhuǎn)。這艘船是Tkinter的畫布上的三角形。我遇到了公式，為三角形的坐標(biāo)。我相信這是與sin和cos，雖然我并不很清楚。到目前為止，我有兩個類一個用于船舶和其他的在船級我對按鍵。任何幫助將不勝感激。謝謝。船級

import math
class Ship:
 def __init__(self,canvas,x,y,width,height):
  self.canvas = canvas
  self.x = x - width/2
  self.y = y + height/2
  self.width = width
  self.height = height
  self.x0 = self.x
  self.y0 = self.y
  self.x1 = self.x0 + self.width/2
  self.y1 = self.y0-self.height
  self.x2 = self.x0 + self.width
  self.y2 = self.y0
  self.ship = self.canvas.create_polygon((self.x0, self.y0, self.x1, self.y1, self.x2, self.y2), outline="white", width=3)
 def changeCoords(self):
  self.canvas.coords(self.ship,self.x0, self.y0, self.x1, self.y1, self.x2, self.y2)
 def rotateLeft(self, event=None):
  # Should rotate one degree left.
  pass
 def rotateRight(self, event=None):
  # Should rotate one degree right.
  self.x0 = self.x0 -1
  self.y0 = self.y0 - 1
  self.x1 = self.x1 + 1
  self.y1 = self.y1 + 1
  self.x2 = self.x2 - 1
  self.y2 = self.y2 + 1
  self.changeCoords()

類

from Tkinter import *
from ship import *

class Game:
 def __init__(self, gameWidth, gameHeight):
  self.root = Tk()
  self.gameWidth = gameWidth
  self.gameHeight = gameHeight
  self.gameWindow()
  self.ship = Ship(self.canvas, x=self.gameWidth/2,y=self.gameHeight/2, width=50, height=50)
  self.root.bind('<Left>', self.ship.rotateLeft)
  self.root.bind('<Right>', self.ship.rotateRight)
  self.root.mainloop()
 def gameWindow(self):
  self.frame = Frame(self.root)
  self.frame.pack(fill=BOTH, expand=YES)
  self.canvas = Canvas(self.frame,width=self.gameWidth, height=self.gameHeight, bg="black", takefocus=1)
  self.canvas.pack(fill=BOTH, expand=YES)  
asteroids = Game(600,600)

本文地址：CodeGo.net/182737/
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1. 首先，你需要圍成的三角形的中心旋轉(zhuǎn)。重心很可能最適合的。地發(fā)現(xiàn)，你的公式C = (1/3*(x0 + x1 + x2), 1/3*(y0 + y1 + y2))的，因為它是所有點的平均值中的三角形。然后，你必須應(yīng)用旋轉(zhuǎn)以該點為中心。所以它會是這樣的...

import math
class Ship:
 def centroid(self):
  return 1 / 3 * (self.x0 + self.x1 + self.x2), 1 / 3 * (self.y0 + self.y1 + self.y2)
 def __init__(self, canvas, x, y, width, height, turnspeed, acceleration=1):
  self._d = {'Up':1, 'Down':-1, 'Left':1, 'Right':-1}
  self.canvas = canvas
  self.width = width
  self.height = height
  self.speed = 0
  self.turnspeed = turnspeed
  self.acceleration = acceleration
  self.x0, self.y0 = x, y
  self.bearing = -math.pi / 2
  self.x1 = self.x0 + self.width / 2
  self.y1 = self.y0 - self.height
  self.x2 = self.x0 + self.width
  self.y2 = self.y0
  self.x, self.y = self.centroid()
  self.ship = self.canvas.create_polygon((self.x0, self.y0, self.x1, self.y1, self.x2, self.y2), outline="white", width=3)
 def changeCoords(self):
  self.canvas.coords(self.ship,self.x0, self.y0, self.x1, self.y1, self.x2, self.y2)
 def rotate(self, event=None):
  t = self._d[event.keysym] * self.turnspeed * math.pi / 180 # the trig functions generally take radians as their arguments rather than degrees; pi/180 radians is equal to 1 degree
  self.bearing -= t
  def _rot(x, y):
   #note: the rotation is done in the opposite fashion from for a right-handed coordinate system due to the left-handedness of computer coordinates
   x -= self.x
   y -= self.y
   _x = x * math.cos(t) + y * math.sin(t)
   _y = -x * math.sin(t) + y * math.cos(t)
   return _x + self.x, _y + self.y
  self.x0, self.y0 = _rot(self.x0, self.y0)
  self.x1, self.y1 = _rot(self.x1, self.y1)
  self.x2, self.y2 = _rot(self.x2, self.y2)
  self.x, self.y = self.centroid()
  self.changeCoords()
 def accel(self, event=None):
  mh = int(self.canvas['height'])
  mw = int(self.canvas['width'])
  self.speed += self.acceleration * self._d[event.keysym]
  self.x0 += self.speed * math.cos(self.bearing)
  self.x1 += self.speed * math.cos(self.bearing)
  self.x2 += self.speed * math.cos(self.bearing)
  self.y0 += self.speed * math.sin(self.bearing)
  self.y1 += self.speed * math.sin(self.bearing)
  self.y2 += self.speed * math.sin(self.bearing)
  self.x, self.y = self.centroid()
  if self.y < - self.height / 2:
   self.y0 += mh
   self.y1 += mh
   self.y2 += mh
  elif self.y > mh + self.height / 2:
   self.y0 += mh
   self.y1 += mh
   self.y2 += mh
  if self.x < -self.width / 2:
   self.x0 += mw
   self.x1 += mw
   self.x2 += mw
  elif self.x > mw + self.width / 2:
   self.x0 -= mw
   self.x1 -= mw
   self.x2 -= mw
  self.x, self.y = self.centroid()
  self.changeCoords()

我做了修改，以使更多的有點像小行星的控件，順便說一句。（沒有射擊 CodeGo.net，雖然，我可能得到更進這個比我的預(yù)期，但我不打算做的一切。此外，當(dāng)您嘗試多個鍵一次有一個有點問題，但是這是由于這樣就Tk的事件處理，它不是設(shè)計的游戲，所以你必須反復(fù)折騰公平一點，以獲得與TK / Tkinter的正常工作。）

from tkinter import *
from ship import *
class Game:
 def __init__(self, gameWidth, gameHeight):
  self.root = Tk()
  self.gameWidth = gameWidth
  self.gameHeight = gameHeight
  self.gameWindow()
  self.ship = Ship(self.canvas, x=self.gameWidth / 2,y=self.gameHeight / 2, width=50, height=50, turnspeed=10, acceleration=5)
  self.root.bind('<Left>', self.ship.rotate)
  self.root.bind('<Right>', self.ship.rotate)
  self.root.bind('<Up>', self.ship.accel)
  self.root.bind('<Down>', self.ship.accel)
  self.root.mainloop()
 def gameWindow(self):
  self.frame = Frame(self.root)
  self.frame.pack(fill=BOTH, expand=YES)
  self.canvas = Canvas(self.frame,width=self.gameWidth, height=self.gameHeight, bg="black", takefocus=1)
  self.canvas.pack(fill=BOTH, expand=YES)  
asteroids = Game(600,600)

順便說一句，你可能想的屬性，以便更容易處理點，這樣的。
本文標(biāo)題：如何旋轉(zhuǎn)一個多邊形在python的Tkinter的畫布？
本文地址：CodeGo.net/182737/