it would be good to have a tile that only cleaned the graphics and kept the other setting such as current pen thickness, colour, turtle position, heading etc<div><br></div><div>logowriter had a </div><div>rg reset graphics which acted like the TA clean</div>
<div>and a</div><div>clean which acted like I'm suggesting in my first line, other settings not being reset</div><div><br>
</div><div>for example</div><div>I wanted to write a procedure that showed the number of the colour as the colour changed by changing the heading, for instance</div><div><br></div><div>I can do that but it would be much easier and initially more understandable for students if there was a clean that kept other settings</div>
<div><br></div><div>it would even better still if there was a separate way to erase show while the procedure was running</div><div><br></div><div>( I haven't looked at the python yet )</div><div><br></div><div>How to do it with the current TA</div>
<div>store in box1: 0</div><div>repeat 90</div><div> setpensize 10</div><div> right box1</div><div> set color heading</div><div> show heading</div><div> forward 100</div><div> back 100</div><div> wait 10</div><div> store in box1: box1 + 1</div>
<div> clean (everything resets)</div><div><br></div><div>How to do it with a clean that cleans graphics but keeps other settings:</div><div><div> setpensize 10</div><div>repeat 90</div><div><div> forward 100</div><div> back 100</div>
<div> right 1</div><div> set color heading</div></div><div> show heading</div><div> wait 10</div><div> clean (only the graphics are cleaned)</div></div><div><br></div><div>The ability to see how heading works concretely in action and to program this fairly easily would make a difference as to the percentage of students who grasp the concept</div>
<div>Actually for a while there I thought that setpensize was broken because I didn't realise that clean was a total reset</div><div><br></div><div><br></div>