[Etoys] Pen color categoyry

karl karl.ramberg at comhem.se
Mon Mar 31 11:45:24 EDT 2008

karl wrote:
> K. K. Subramaniam wrote:
>> On Sunday 30 Mar 2008 11:40:09 pm karl wrote:
>>> I was playing a little with Etoys and pen use today and found that it's
>>> hard to change pen color of SketchMorphs in scripts because their color
>>> category in the Viewer is not in use. But many times I may want to
>>> change the pen color of a SketchMorph so I thought a Pen Color category
>>> could be nice.
>> +1 with a slight modification.
>> In Logo's Turtle, the pen was a tangible and visible entity which made it easy 
>> for kids to comprehend it. In Etoy, the Pen is an invisible, abstract entity 
>> whose presence is manifest only in the trails it leaves behind. This runs 
>> counter to Morphic principle of directness. Instead, pen methods could be 
>> factored into a separate Morph, say PenMorph, that can be manipulated by kids 
>> directly to affect size, color, shape, trailstyle and up/down state.
>> Subbu
>> _______________________________________________
>> Etoys mailing list
>> Etoys at lists.laptop.org
>> http://lists.laptop.org/listinfo/etoys
> I agree that the current pen is a little abstract and intangible, and it 
> can feel a little left in the background. But then again, Etoys is so 
> wast, many features are hard to grasp and get right away.
Here is a example of the indirection one must go though to get a change 
in pen color. Making pen a first class object would simplify this logic 
a little.

This example is from a simple color filter etoy I made, where some basic 
digital image color manipulation can be experimented with using two 
turtles moving in unison. One turtle for reading and one for writing.

-------------- next part --------------
A non-text attachment was scrubbed...
Name: pencolor.jpeg
Type: image/jpeg
Size: 17602 bytes
Desc: not available
Url : http://lists.laptop.org/pipermail/etoys/attachments/20080331/b0653335/attachment-0001.jpeg 

More information about the Etoys mailing list