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Line 541:
Line 541: − === myblock.py === Line 554:
Line 553: + + + + + + + + + + + + + + + + + + + + + + + + + + + Line 580:
Line 606: − def myblock(lc, x):+ − ########################################################################### − # − # Draw a dotted line of length x. − # − ########################################################################### − try: # make sure x is a number − x = float(x) − except ValueError: − return − if lc.tw.canvas.pendown: − dist = 0 − while dist+lc.tw.canvas.pensize < x: # repeat drawing dots − lc.tw.canvas.setpen(True) − lc.tw.canvas.forward(1) − lc.tw.canvas.setpen(False) − lc.tw.canvas.forward((lc.tw.canvas.pensize*2)-1) − dist += (lc.tw.canvas.pensize*2) − lc.tw.canvas.forward(x-dist) # make sure we have moved exactly x − lc.tw.canvas.setpen(True) − else: − lc.tw.canvas.forward(x) − return − [[Image:TA-dotted-line.png]]
Activities/Turtle Art (view source)
Revision as of 17:09, 26 February 2010
, 17:09, 26 February 2010→myblock.py
The following feature is only available in versions 44+ of Turtle Art.
The following feature is only available in versions 44+ of Turtle Art.
And a block that can be programmed by the Pippy interface:
And a block that can be programmed by the Pippy interface:
Examples:
Examples:
def myblock(lc, x):
###########################################################################
#
# Draw a dotted line of length x.
#
###########################################################################
try: # make sure x is a number
x = float(x)
except ValueError:
return
if lc.tw.canvas.pendown:
dist = 0
while dist+lc.tw.canvas.pensize < x: # repeat drawing dots
lc.tw.canvas.setpen(True)
lc.tw.canvas.forward(1)
lc.tw.canvas.setpen(False)
lc.tw.canvas.forward((lc.tw.canvas.pensize*2)-1)
dist += (lc.tw.canvas.pensize*2)
lc.tw.canvas.forward(x-dist) # make sure we have moved exactly x
lc.tw.canvas.setpen(True)
else:
lc.tw.canvas.forward(x)
return
[[Image:TA-dotted-line.png]]
You can pass a list of up to three arguments to tamyblock.py as in this example that converts the input to an rgb value.
def myblock(lc, x):
def myblock(lc, x):
return
return
[[Image:TA-rgb.png]]
def myblock(lc, x):
def myblock(lc, x):