<div>Hi Brian --</div>
<div> </div>
<div>If you wanna go to a lot of work, but not a huge amount, write wrapper class for the Standard Library turtle that intercepts its commands and updates an on-board data structure, representing pixels x pixels, specifying self position, keep color info stashed per each one. That's a lot of data, depending on screen resolution. Consider a thick line option if you have one, make your turtle "wide body". Or stay with thin.</div>
<div> </div>
<div>So then if you go turtle.forward(10) you will send it to your self-made forward method. Stop and smell the pixels, see what color was stashed there, either by another turtle (! -- shared data structure) or by this turtle, or maybe it's still the default untrammeled color.</div>
<div> </div>
<div>You can add new methods, like "glide" or "explode" that translate to the underlying turtle somehow -- use your imagination.</div>
<div> </div>
<div>Kirby</div>
<div><br><br> </div>
<div class="gmail_quote">On Sun, Jan 24, 2010 at 7:29 AM, Brian Blais <span dir="ltr"><<a href="mailto:bblais@bryant.edu">bblais@bryant.edu</a>></span> wrote:<br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">
<div style="WORD-WRAP: break-word">Hello,
<div><br></div>
<div>I am trying to think of things to do with the turtle module with my students, and I have some ideas where I am not sure whether the turtle module can do it.</div>
<div><br></div>
<div>1) is there a way to determine the current screen pixel color? I am thinking about having the turtle go forward until it reaches an object, say a red circle. I can probably do this by making circle objects (drawn with turtles themselves) which know their own position, and check against this info. But I thought it might be useful also for the turtle to know.</div>
<div><br></div>
<div>2) is there a way to put a limit on the extent the turtle can travel? it seems I can keep moving off of the screen. Is there a way to make it so that a forward(50) command, at the edge, either raises an exception (at the wall) or simply doesn't move the turtle because of the limit?</div>
<div><br></div>
<div><br></div>
<div>thanks!</div>
<div><br></div>
<div><br></div>
<div><span style="WHITE-SPACE: pre"></span>bb<br><br>
<div><span style="TEXT-TRANSFORM: none; TEXT-INDENT: 0px; BORDER-COLLAPSE: separate; FONT: medium Monaco; WHITE-SPACE: normal; LETTER-SPACING: normal; COLOR: rgb(0,0,0); WORD-SPACING: 0px"><span style="TEXT-TRANSFORM: none; TEXT-INDENT: 0px; BORDER-COLLAPSE: separate; FONT: 13px Monaco; WHITE-SPACE: normal; LETTER-SPACING: normal; COLOR: rgb(0,0,0); WORD-SPACING: 0px">
<div>-- </div>
<div>Brian Blais</div>
<div><a href="mailto:bblais@bryant.edu" target="_blank">bblais@bryant.edu</a></div>
<div><a href="http://web.bryant.edu/~bblais" target="_blank">http://web.bryant.edu/~bblais</a></div>
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