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80 lines
3.3 KiB
80 lines
3.3 KiB
# coding:utf-8
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from tkinter import Tk,Canvas
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import math,threading,time
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class TkCube(object):
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def __init__(self):
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self.points = [[-1,1,-1], # LeftFrontDown
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[1,1,-1], # RFD
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[-1,-1,-1], # LBD
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[1,-1,-1], # RBD
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[-1,1,1], # LFU
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[1,1,1], # RFU
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[-1,-1,1], # LBU
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[1,-1,1]] # RBU
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self.pit = [[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0]] # point in 2d
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self.angle = 0
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self.speed = 1 # π/s
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self.fps = 60
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self.dist = [5,4] # distance between the cube's center and focal point/canvas
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self.st = 1/self.fps # sleep time
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self.apf = math.pi * self.speed / self.fps # angle per frame
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# init canvas
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self.tkroot = Tk()
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self.cvs = [Canvas(self.tkroot,bg='white',width=800,height=600),Canvas(self.tkroot,bg='white',width=800,height=600)]
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self.cvs[0].pack()
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self.showingCv = 0
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self.hiddenCv = 1
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def rotate(self):
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self.angle += self.apf
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if self.angle > 2*math.pi:
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self.angle -= 2*math.pi
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radius = math.sqrt(2) # 点旋转的半径
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for pair in [[0,4,-math.pi/4],
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[1,5,math.pi/4],
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[2,6,-math.pi*3/4],
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[3,7,math.pi*3/4]]: # rotate in pairs
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center = [radius*math.sin(self.angle+pair[2]),radius*math.cos(self.angle+pair[2])]
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# x
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self.points[pair[0]][0] = center[0]
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self.points[pair[1]][0] = center[0]
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# y
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self.points[pair[0]][1] = center[1]
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self.points[pair[1]][1] = center[1]
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def draw(self):
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# project points into 2D canvas 投影到2D
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for pt in range(8):
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rate = self.dist[1]/(self.dist[0]+self.points[pt][1])
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scale = 200
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self.pit[pt][0] = self.points[pt][0]*rate*scale
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self.pit[pt][1] = self.points[pt][2]*rate*scale
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self.cvs[self.hiddenCv].delete('all')
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for dcp,nps in [[1,[0,3,5]], # drawing central point:以1,2,4,7四个点为中心,分别连接相邻的三个点即可绘成正方体
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[2,[0,3,6]],
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[4,[0,5,6]],
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[7,[3,5,6]]]:
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for np in nps: # nearby point
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self.cvs[self.hiddenCv].create_line(self.pit[dcp][0]+400,self.pit[dcp][1]+300,self.pit[np][0]+400,self.pit[np][1]+300) # 因为坐标原点在左上角,让x和y分别加400和300让画面在窗口中心
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# 切换canvas
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self.cvs[self.showingCv].pack_forget()
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self.cvs[self.hiddenCv].pack()
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self.showingCv,self.hiddenCv = self.hiddenCv,self.showingCv
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def run(self):
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while True:
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# self.rotateThread = threading.Thread(target=self.rotate)
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# self.rotateThread.run()
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# self.drawThread = threading.Thread(target=self.draw)
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# self.drawThread.run()
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self.rotate()
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self.draw()
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# print(self.points)
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time.sleep(self.st)
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def start(self):
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self.runThread = threading.Thread(target=self.run)
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self.runThread.start()
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self.tkroot.mainloop()
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if __name__ == '__main__':
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tc = TkCube()
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tc.start()
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