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Line 553: − [[Image:TAMyblock.svg]]+ − Examples:+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + − def myblock(lc,x): + − # draw a dotted line of length x+ − # make sure x is a number+ − if type(x) != int and type(x) != float: − dist = 0+ − # save current turtle pen state + − pen = lc.tw.turtle.pendown+ − # repeat drawing dots+ − while dist+lc.tw.turtle.pensize < x:+ − setpen(lc.tw.turtle, True)+ − forward(lc.tw.turtle, 1)+ − setpen(lc.tw.turtle, False)+ − forward(lc.tw.turtle, (lc.tw.turtle.pensize*2)-1)+ − dist += (lc.tw.turtle.pensize*2)+ − # make sure we have moved exactly x+ − forward(lc.tw.turtle, x-dist)+ − # restore pen state + − setpen(lc.tw.turtle, pen)+ − return − + − + + + + + + + − # push result onto heap (use the pop block to use the new string) − return + + + + + + + + + + + − def myblock(lc,x): − # push hours, minutes, seconds onto the heap − # use three pop blocks to retrieve the values − # remember: the heap is a FILO (first in, last out) − # the first value you will pop will be seconds − return + + + + + + + + − def myblock(lc,x): − # add a third dimension (gray) to the color model − # calculate the value (brightness) of the current color − # make sure gray is in range from 0 to 100 − # mix in gray − + − return+ + + + + + + + + − def myblock(lc,x)+ − # save a screenshot in the journal+ − − return
Activities/Turtle Art (view source)
Revision as of 15:55, 26 February 2010
, 15:55, 26 February 2010→myblock.py
To use the customized block, select the "view source" block from the Extras palette.
To use the customized block, select the "view source" block from the Extras palette.
Examples:
def myblock(lc, x):
###########################################################################
#
# Set rgb color
#
###########################################################################
r = int(x[0])
while r < 0:
r += 256
while r > 255:
r -= 256
g = int(x[1])
while g < 0:
g += 256
while g > 255:
g -= 256
b = int(x[0])
while b < 0:
b += 256
while b > 255:
b -= 256
rgb = "#%02x%02x%02x" % (r,g,b)
lc.tw.fgcolor = lc.tw.cm.alloc_color(rgb)
return
def myblock(lc, x):
###########################################################################
#
# Draw a dotted line of length x.
#
###########################################################################
try: # make sure x is a number
x = float(x)
except ValueError:
return
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]]
[[Image:TA-dotted-line.png]]
def myblock(lc,x):
def myblock(lc, x):
# push an uppercase version of a string onto the heap
###########################################################################
#
# Push an uppercase version of a string onto the heap.
# Use a 'pop' block to use the new string.
#
###########################################################################
if type(x) != str:
if type(x) != str:
X = str(x).upper()
X = str(x).upper()
else:
else:
X = x.upper()
X = x.upper()
lc.heap.append(X)
lc.heap.append(X)
return
def myblock(lc, x):
###########################################################################
#
# Push hours, minutes, seconds onto the FILO.
# Use three 'pop' blocks to retrieve these values.
# Note: because we use a FILO (first in, last out heap),
# the first value you will pop will be seconds.
#
###########################################################################
lc.heap.append(localtime().tm_hour)
lc.heap.append(localtime().tm_hour)
lc.heap.append(localtime().tm_min)
lc.heap.append(localtime().tm_min)
lc.heap.append(localtime().tm_sec)
lc.heap.append(localtime().tm_sec)
return
def myblock(lc, x):
###########################################################################
#
# Add a third dimension (gray) to the color model.
#
###########################################################################
val = 0.3 * lc.tw.rgb[0] + 0.6 * lc.tw.rgb[1] + 0.1 * lc.tw.rgb[2]
val = 0.3 * lc.tw.rgb[0] + 0.6 * lc.tw.rgb[1] + 0.1 * lc.tw.rgb[2]
if x != 100:
if x != 100:
x = int(x)%100
x = int(x)%100
r = int((val*(100-x) + lc.tw.rgb[0]*x)/100)
r = int((val*(100-x) + lc.tw.rgb[0]*x)/100)
g = int((val*(100-x) + lc.tw.rgb[1]*x)/100)
g = int((val*(100-x) + lc.tw.rgb[1]*x)/100)
b = int((val*(100-x) + lc.tw.rgb[2]*x)/100)
b = int((val*(100-x) + lc.tw.rgb[2]*x)/100)
# reallocate current color
# reallocate current color
lc.tw.fgcolor = lc.tw.cm.alloc_color(r<<8,g<<8,b<<8)
rgb = "#%02x%02x%02x" % (r,g,b)
lc.tw.fgcolor = lc.tw.cm.alloc_color(rgb)
return
def myblock(lc, x):
###########################################################################
#
# Save an image named x to the Sugar Journal.
#
###########################################################################
lc.tw.save_as_image(str(x))
return
lc.tw.activity._do_saveimage_cb(lc.tw.activity)
===From the field===
===From the field===