[Bugs] #1330 UNSP: turtle art clean brick

[SugarLabs Bugs]

#1330: turtle art clean brick
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    Reporter:  walter                     |          Owner:  walter                     
        Type:  enhancement                |         Status:  new                        
    Priority:  Unspecified by Maintainer  |      Milestone:  Unspecified by Release Team
   Component:  Turtleart                  |        Version:  Unspecified                
    Severity:  Unspecified                |       Keywords:                             
Distribution:  Unspecified                |   Status_field:  Unconfirmed                
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 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

 logowriter had a
 rg reset graphics which acted like the TA clean
 and a
 clean which acted like I'm suggesting in my first line, other settings not
 being reset

 for example
 I wanted to write a procedure that showed the number of the colour as the
 colour changed by changing the heading, for instance

 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

 it would even better still if there was a separate way to erase show while
 the procedure was running

 ( I haven't looked at the python yet )

 How to do it with the current TA
 store in box1: 0
 repeat 90
  setpensize 10
  right box1
  set color heading
  show heading
  forward 100
  back 100
  wait 10
  store in box1: box1 + 1
  clean (everything resets)

 How to do it with a clean that cleans graphics but keeps other settings:
  setpensize 10
 repeat 90
   forward 100
   back 100
   right 1
   set color heading
   show heading
   wait 10
   clean (only the graphics are cleaned)

 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
 Actually for a while there I thought that setpensize was broken because I
 didn't realise that clean was a total reset


 --Bill Kerr

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Ticket URL: <http://dev.sugarlabs.org/ticket/1330>
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