diff --git a/src/epoint.py b/src/epoint.py
--- a/src/epoint.py
+++ b/src/epoint.py
@@ -6,6 +6,15 @@ class EPoint:
   def __init__(self,x,y):
     self.x=x
     self.y=y
+    
+  def fromTuple(tup): return EPoint(tup[0],tup[1])
+  
+  def fromProjective(point):
+    if point.item(0)==0: return None
+    return EPoint(point.item(1)/point.item(0),point.item(2)/point.item(0))
+    
+  def toProjective(self):
+    return (1,self.x,self.y)
   
   def dist(self,a):
     return math.sqrt((self.x-a.x)**2+(self.y-a.y)**2)
@@ -13,8 +22,48 @@ class EPoint:
   def __add__(self,a):
     return EPoint(self.x+a.x,self.y+a.y)
     
+  def __sub__(self,a):
+    return EPoint(self.x-a.x,self.y-a.y)
+    
+  def __mul__(self,k):
+    return EPoint(self.x*k,self.y*k)
+    
+  def __rmul__(self,k):
+    return self*k
+    
   def __truediv__(self,k):
     return EPoint(self.x/k,self.y/k)
     
-  def __str__(self): return "({0},{1})".format(self.x,self.y)
-  def __repr__(self): return "EPoint({0},{1})".format(self.x,self.y)
+  def __floordiv__(self,k):
+    return EPoint(self.x//k,self.y//k)
+    
+  def __iadd__(self,a):
+    self.x+=a.x
+    self.y+=a.y
+    return self
+    
+  def __isub__(self,a):
+    self.x-=a.x
+    self.y-=a.y
+    return self
+  
+  def __imul__(self,k):
+    self.x*=k
+    self.y*=k
+    return self
+    
+  def __itruediv__(self,k):
+    self.x/=k
+    self.y/=k
+    return self
+    
+  def __ifloordiv__(self,k):
+    self.x//=k
+    self.y//=k
+    return self
+    
+  def __neg__(self):
+    return EPoint(-self.x,-self.y)
+    
+  def __str__(self): return "({0},{1})".format(round(self.x,3),round(self.y,3))
+  def __repr__(self): return "EPoint({0},{1})".format(round(self.x,3),round(self.y,3))