Yertle the Turtle

[Richmond Mathewson]

Having imported an SVG image of a tortoise into a stack . . .

Being a fan of Seymour Papert . . .

I thought I'd try and implement turtle graphics in Livecode.

But came up against something awkward . . .

[As a caveat, I should like to point out I don't know how the following 
is implemented
in any other languages either]

1. Rotating my turtle widget is easy.

2. But telling the turtle to move forwards or backwards is not easy at all:

In LOGO one can tell the turtle to turn left by, say, 30 degrees, and 
then move forward 20 units.

But in LiveCode, as far as I know, one can either move an object by 
setting 2 coordinates,
or by 'set the loc'.

2.1. Now if I want my turtle, rotated at 30 degrees to move forward by 
20 units I will have to mess
around with SINE and COSINE and probably not end up with the turtle 
moving exactly 20 units at 30
degrees from the vertical.

2.2. I wonder how my turtle will be seen to draw a pen line from the two 
ends of the "line".

Richmond.