diff --git a/src/element.py b/src/element.py
index 87b4211..38dd650 100644
--- a/src/element.py
+++ b/src/element.py
@@ -290,7 +290,7 @@ class Element_circle(Element):
         dx=math.floor(0.5*self.size/lattice.spacing)
         for i in range(-dx,dx+1):
             for j in range(-dx,dx+1):
-                if i*i+j*j<=2*dx*dx:
+                if lattice.spacing*lattice.spacing*(i*i+j*j)<=self.size*self.size/4:
                     out.append(Point(self.pos.x+i*lattice.spacing,self.pos.y+j*lattice.spacing))
         return out
 
diff --git a/src/painter.py b/src/painter.py
index 264165e..9701023 100644
--- a/src/painter.py
+++ b/src/painter.py
@@ -212,7 +212,7 @@ class Painter(Widget):
         if count==0:
             return
         Color(color[0],color[1],color[2],1-count*0.1)
-        Rectangle(pos=(self.pos_tocoord_x(x-0.5),self.pos_tocoord_y(y-0.5)),size=(self.base_size,self.base_size))
+        Rectangle(pos=(self.pos_tocoord_x(x-0.5*self.lattice.spacing),self.pos_tocoord_y(y-0.5*self.lattice.spacing)),size=(self.base_size*self.lattice.spacing,self.base_size*self.lattice.spacing))