def rotate(cw=True):
"Rotate the bar pattern, clockwise (if cw is True) or anticlockwise."
global fps, duration, fast
t,i = 0,0
while i != duration:
p1 = time.time() # time measuring point 1
if cw: x_offset = t
else: x_offset = t * (-1)
panel_pattern(x_offset)
# Theoretically, the arena should be able to render all eight
# panels simultaneously. However, on at least one arena, one panel
# develops problems with this approach. Therefore, I here revert to
# only updating half the panels at once. If speed is off the essence,
# this behaviour can be turned off using the `fast` flag.
if not fast:
for p in range(8):
if p < 4: arena.toggle_panel(p, True)
else: arena.toggle_panel(p, False)
arena.render()
panel_pattern(x_offset)
for p in range(8):
if p < 4: arena.toggle_panel(p, False)
else: arena.toggle_panel(p, True)
arena.render()
p2 = time.time() # time measuring point 2
sleep_time = (1.0/fps) - (p2-p1)
if sleep_time > 0: time.sleep(sleep_time)
if t < 7: t = t+1
else: t = 0
i = i + 1
def plot(coords, colour="green", flush=False):
'''
Draw a shape from a list of coordinates (as produced by the shape functions).
colour: The colour to use
flush: If true, will output the result immediately
'''
for c in coords:
arena.set_pixel(c[0], c[1], colour)
if flush: arena.render()
def draw_house():
arena.clear("blue", show=False) #sky
# Note the order of drawing! (Some shapes overlap)
shape.plot(shape.rectangle(24,15,72,15,72,7,24,7), colour="orange") #main house
shape.plot(shape.rectangle(20,7,24,3,72,3,76,7), colour="red") #roof
shape.plot(shape.rectangle(58,15,58,10,64,10,64,15), colour="magenta") #door
arena.set_pixel(63,12,"red") #doorknob
shape.plot(shape.rectangle(32,9,44,9,44,12,32,12), colour="cyan") #window
shape.plot(shape.rectangle(98,11,100,11,100,15,98,15), colour="magenta") #tree trunk
shape.plot(shape.circle(99,6,5), colour="green") #tree foliage
shape.plot(shape.circle(122,3,2), colour="yellow") #sun
shape.plot(shape.line(0,15,127,15), colour="green") #grass
arena.render()
def animate(ticks=-1):
'''
Animate the elements at the given framerate for a set time
ticks: number of ticks to run the animation for (-1 -> forever)
fps: framerate in ticks per second (default: 21fps = 60deg/s)
'''
global bg_col, fps
arena.clear(bg_col, show=False)
i = 0
while i != ticks:
i = i + 1 # infinity loop if ticks = -1
draw_bar(i)
draw_dot(i)
arena.render()
time.sleep(1.0/fps)
def flow(fw=True):
"Show the optic flow pattern, forward (if fw is True) or backward."
global fps, duration
t,i = 0,0
while i != duration:
p1 = time.time() # time measuring point 1
if fw: x_left, x_right = t*(-1)+4, t
else: x_left, x_right = t+4, t*(-1)
panel_pattern(x_right)
for p in range(8):
if p < 4: arena.toggle_panel(p, True)
else: arena.toggle_panel(p, False)
arena.render()
panel_pattern(x_left)
for p in range(8):
if p < 4: arena.toggle_panel(p, False)
else: arena.toggle_panel(p, True)
arena.render()
p2 = time.time() # time measuring point 2
sleep_time = (1.0/fps) - (p2-p1)
if sleep_time > 0: time.sleep(sleep_time)
if t < 7: t = t+1
else: t = 0
i = i + 1