diff options
Diffstat (limited to 'pysamples/dotted_line.py')
| -rw-r--r-- | pysamples/dotted_line.py | 73 |
1 files changed, 44 insertions, 29 deletions
diff --git a/pysamples/dotted_line.py b/pysamples/dotted_line.py index febd409..c581f83 100644 --- a/pysamples/dotted_line.py +++ b/pysamples/dotted_line.py @@ -1,4 +1,4 @@ -#Copyright (c) 2009-11, Walter Bender +#Copyright (c) 2009-13, Walter Bender # This procedure is invoked when the user-definable block on the "extras" # palette is selected. Some examples of how to use this block are included @@ -52,43 +52,57 @@ # clearscreen(self) tw.canvas.clearscreen() # Note: Clears the screen and resets all turtle and # pen attributes to default values -# setpen(self, flag) tw.canvas.setpen(True) +# +# +# Class Turtles -- useful properties and methods (from within +# tamyblock.py, tw.turtles is the class instance) +# +# self.set_turtle(name) tw.turltes.set_turtle(1) +# Note: Set the current turtle to turtle '1' +# self.get_active_turtle() tw.turltes.get_active_turtle() +# Note: Returns active turtle (See Class Turtle below) +# +# Class Turtle -- useful properties and methods (from within +# tamyblock.py, tw.turtles.get_active_turtle() is the class instance) +# +# set_pen_state(self, flag) +# tw.turtles.get_active_turtle().set_pen_state(True) # Note: True will set the pen "down", enabling drawing; # False will set the pen "up" -# forward(self, n) tw.canvas.forward(100) +# forward(self, n) tw.turtles.get_active_turtle().forward(100) # Note: Move the turtle forward 100 units -# arc(self, a, r) tw.canvas.arc(120, 50) +# arc(self, a, r) tw.turtles.get_active_turtle().arc(120, 50) # Note: Move the turtle along an arc of 120 degrees # (clockwise) and radius of 50 units -# setheading(self, a) tw.canvas.setheading(180) +# set_heading(self, a) tw.turtles.get_active_turtle().set_heading(180) # Note: Set the turtle heading to 180 # (towards the bottom of the screen) -# self.heading tw.canvas.heading +# self.get_heading() tw.turtles.get_active_turtle().get_heading() # Note: The current heading -# setpensize(self, n) tw.canvas.setpensize(25) +# set_pen_size(self, n) tw.turtles.get_active_turtle().set_pen_size(25) # Note: Set the turtle pensize to 25 units -# self.pensize tw.canvas.pensize -# Note: The current pensize -# setcolor(self, c) tw.canvas.color(70) +# self.get_pen_size() tw.turtles.get_active_turtle().get_pen_size() +# Note: The current pen size +# self.set_color(self, c) tw.turtles.get_active_turtle().set_color(70) # Note: Set the pen color to 70 (blue) -# self.color tw.canvas.color +# self.color() tw.turtles.get_active_turtle().get_color() # Note: The current pen color -# setshade(self, s) tw.canvas.shade(50) +# self.set_shade(self, s) tw.turtles.get_active_turtle().set_shade(50) # Note: Set the pen shade to 50 -# self.shade tw.canvas.shade +# self.get_shade() tw.turtles.get_active_turtle().get_shade() # Note: The current pen shade -# fillscreen(self, c, s) tw.canvas.fillscreen(70, 90) +# fillscreen(self, c, s) +# tw.turtles.get_active_turtle().fillscreen(70, 90) # Note: Fill the screen with color 70, shade 90 (light blue) -# setxy(self, x, y) tw.canvas.setxy(100,100) +# self.set_xy(self, (x, y)) +# tw.turtles.get_active_turtle().set_xy((100,100)) # Note: Move the turtle to position (100, 100) -# self.xcor tw.canvas.xcor +# self.get_xy tw.turtles.get_active_turtle().get_xy()[0] # Note: The current x coordinate of the turtle # (scaled to current units) -# self.ycor tw.canvas.ycor +# self.get_xy tw.turtles.get_active_turtle().get_xy()[1] # Note: The current y coordinate of the turtle # (scaled to current units) -# self.set_turtle(name) tw.canvas.set_turtle(1) -# Note: Set the current turtle to turtle '1' # # # Other useful Python functions @@ -117,17 +131,18 @@ def myblock(tw, line_length): line_length = float(line_length) except ValueError: return - if tw.canvas.pendown: + if tw.turtles.get_active_turtle().get_pen_state(): dist = 0 - while dist + tw.canvas.pensize < line_length: # repeat drawing dots - tw.canvas.setpen(True) - tw.canvas.forward(1) - tw.canvas.setpen(False) - tw.canvas.forward((tw.canvas.pensize * 2) - 1) - dist += (tw.canvas.pensize * 2) + pen_size = tw.turtles.get_active_turtle().get_pen_size() + while dist + pen_size < line_length: # repeat drawing dots + tw.turtles.get_active_turtle().set_pen_state(True) + tw.turtles.get_active_turtle().forward(1) + tw.turtles.get_active_turtle().set_pen_state(False) + tw.turtles.get_active_turtle().forward(pen_size * 2 - 1) + dist += pen_size * 2 # make sure we have moved exactly line_length - tw.canvas.forward(line_length - dist) - tw.canvas.setpen(True) + tw.turtles.get_active_turtle().forward(line_length - dist) + tw.turtles.get_active_turtle().set_pen_state(True) else: - tw.canvas.forward(line_length) + tw.turtles.get_active_turtle().forward(line_length) return |