53 lines
1.0 KiB
Python
53 lines
1.0 KiB
Python
|
#!/usr/bin/env python3
|
||
|
|
|
||
|
|
import math
|
||
|
|
|
||
|
|
class Vertex():
|
||
|
|
post=None
|
||
|
|
pre=None
|
||
|
|
def __init__(self,_x,_y):
|
||
|
|
self.x=_x
|
||
|
|
self.y=_y
|
||
|
|
|
||
|
|
def __sub__(self,r):
|
||
|
|
return Vertex(self.x-r.x,self.y-r.y)
|
||
|
|
|
||
|
|
def __str__(self):
|
||
|
|
return "("+str(self.x)+","+str(self.y)+")"
|
||
|
|
|
||
|
|
def __repr__(self):
|
||
|
|
return "("+str(self.x)+","+str(self.y)+")"
|
||
|
|
|
||
|
|
def __eq__(self,p):
|
||
|
|
return (self.x==p.x) and (self.y==p.y)
|
||
|
|
|
||
|
|
def __add__(self,p):
|
||
|
|
return Vertex(self.x+p.x,self.y+p.y)
|
||
|
|
|
||
|
|
#inner product
|
||
|
|
def dot(self,p):
|
||
|
|
return self.x*p.x+self.y*p.y
|
||
|
|
|
||
|
|
def cross(self,p):
|
||
|
|
return self.x*p.y-self.y*p.x
|
||
|
|
|
||
|
|
def length(self):
|
||
|
|
return math.hypot(self.x,self.y)
|
||
|
|
|
||
|
|
def rotate(self,radian):
|
||
|
|
originalX=self.x
|
||
|
|
self.x=self.x*math.cos(radian)-self.y*math.sin(radian)
|
||
|
|
self.y=originalX*math.sin(radian)+self.y*math.cos(radian)
|
||
|
|
|
||
|
|
def set(self,_x,_y):
|
||
|
|
self.x=_x
|
||
|
|
self.y=_y
|
||
|
|
|
||
|
|
def set(self,p):
|
||
|
|
self.x=p.x
|
||
|
|
self.y=p.y
|
||
|
|
|
||
|
|
#SVG for output
|
||
|
|
def toSVG(self):
|
||
|
|
return str(self.x)+","+str(self.y)
|