message: Fix wrong chessboard generation in gen_pattern tool
diff: @@ -38,7 +38,7 @@ class PatternMaker:
  r = spacing / self.radius_rate
  for x in range(1,self.cols+1):
  for y in range(1,self.rows+1):
  - dot = SVG("circle", cx=x * spacing, cy=y * spacing, r=r, fill="black")
  + dot = SVG("circle", cx=x * spacing, cy=y * spacing, r=r, fill="black", stroke="none")
  self.g.append(dot)
  def makeACirclesPattern(self):
  @@ -46,7 +46,7 @@ class PatternMaker:
  r = spacing / self.radius_rate
  for i in range(0,self.rows):
  for j in range(0,self.cols):
  - dot = SVG("circle", cx= ((j*2 + i%2)*spacing) + spacing, cy=self.height - (i * spacing + spacing), r=r, fill="black")
  + dot = SVG("circle", cx= ((j*2 + i%2)*spacing) + spacing, cy=self.height - (i * spacing + spacing), r=r, fill="black", stroke="none")
  self.g.append(dot)
  def makeCheckerboardPattern(self):
  @@ -56,7 +56,7 @@ class PatternMaker:
  for x in range(0,self.cols):
  for y in range(0,self.rows):
  if x%2 == y%2:
  - square = SVG("rect", x=x * spacing + xspacing, y=y * spacing + yspacing, width=spacing, height=spacing, fill="black")
  + square = SVG("rect", x=x * spacing + xspacing, y=y * spacing + yspacing, width=spacing, height=spacing, fill="black", stroke="none")
  self.g.append(square)
  def save(self):
  