Commit 17d55f3716f5ff74f3538295cc84e8a6b4a73a14 - Erratic-Turtle-Graphics

Add screenshot and document the command language. Chris Pressey 2 years ago

2 changed file(s) with 19 addition(s) and 4 deletion(s). Raw diff Collapse all Expand all

+19

-4

README.md less more

0	0	Erratic Turtle Graphics
1	1	=======================
2	2
3		![screenshot](images/erratic-circles.png?raw=true)
	3	![screenshot](images/chain1.png?raw=true)
4	4
5		A gewgaw that I prototyped in 2018 sometime I think. I don't
6		remember when I had the original idea, but I think it was not
7		long before that.
	5	This is a gewgaw that I prototyped sometime in (I believe) 2018.
	6	I don't remember when I had the original idea, but I think it was
	7	not long before that.
8	8
9	9	And that idea is: turtle graphics, except there's a small
10	10	margin of error. You might ask for "Turn right 90 degrees"

12	12
13	13	If you use a faint pen, and repeat the drawing instructions
14	14	many times over, you get a nice pencilly noisy effect.
	15
	16	In late 2019 I added a rudimentary command language similar to
	17	Logo, for user-created designs. The commands are:
	18
	19	fd NUM move forward this many pixels
	20	rt NUM rotate right this many degrees
	21	lt NUM rotate left this many degrees
	22	setxyr NUM NUM set the coordinates, as a percentage of the
	23	width and height of the canvas
	24	shiftxyr NUM NUM adjust the coordinates, as a percentage of the
	25	width and height of the canvas
	26	seterr NUM NUM set the error rate for rotations and
	27	movements respectively
	28	shifterr NUM NUM adjust the error rate for rotations and
	29	movements respectively

images/chain1.png less more

Binary diff not shown