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#Copyright (c) 2009, Walter Bender
#Permission is hereby granted, free of charge, to any person obtaining a copy
#of this software and associated documentation files (the "Software"), to deal
#in the Software without restriction, including without limitation the rights
#to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
#copies of the Software, and to permit persons to whom the Software is
#furnished to do so, subject to the following conditions:
#The above copyright notice and this permission notice shall be included in
#all copies or substantial portions of the Software.
#THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
#IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
#FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
#AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
#LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
#OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
#THE SOFTWARE.
#
# 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
# below. Try uncommenting an example or write your own Python code.
#
# To uncomment code, remove the #s before python code
#
def myblock(lc,x):
###########################################################################
#
# draw a dotted line of length x
#
###########################################################################
try: # make sure x is a number
x = float(x)
except:
return
pen = lc.tw.turtle.pendown # save current turtle pen state
dist = 0
while dist+lc.tw.turtle.pensize < x: # repeat drawing dots
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)
forward(lc.tw.turtle, x-dist) # make sure we have moved x
setpen(lc.tw.turtle, pen) # restore pen state
###########################################################################
#
# push an uppercase version of a string onto the heap
#
###########################################################################
# if type(x) != str:
# X = str(x).upper()
# else:
# X = x.upper()
# push result onto heap (use the pop block to use the new string)
# lc.heap.append(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
#
###########################################################################
# lc.heap.append(localtime().tm_hour)
# lc.heap.append(localtime().tm_min)
# lc.heap.append(localtime().tm_sec)
###########################################################################
#
# add a third dimension (gray) to the color model
# calculate the value (brightness) of the current color
# val = 0.3 * lc.tw.rgb[0] + 0.6 * lc.tw.rgb[1] + 0.1 * lc.tw.rgb[2]
# make sure gray is in range from 0 to 100
#
###########################################################################
# if x != 100:
# x = int(x)%100
# mix in gray
# r = int((val*(100-x) + lc.tw.rgb[0]*x)/100)
# g = int((val*(100-x) + lc.tw.rgb[1]*x)/100)
# b = int((val*(100-x) + lc.tw.rgb[2]*x)/100)
# reallocate current color
# lc.tw.fgcolor = lc.tw.cm.alloc_color(r<<8,g<<8,b<<8)
###########################################################################
#
# save a screen- image in the journal
#
###########################################################################
# lc.tw.activity._do_save_as_image_cb(lc.tw.activity)
return
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