LSystem.Turtle

Standard Turtle graphics.

Documentation

data Turtle

Turtle.

Constructors

Turtle

Fields

ta :: Double

turning angle

tai :: Double

turning angle increment

loc :: Pt

location

hdg :: Double

heading

ll :: Double

line length

ls :: Double

length scalar

stk :: [Turtle]

turtle stack

turnRight :: Turtle -> Turtle

Right turn by ta.

turnLeft :: Turtle -> Turtle

Left turn by ta.

turnBack :: Turtle -> Turtle

180 degree turn.

incrLine :: Turtle -> Turtle

Increment line length (ll) by multiplying by line scalar (ls).

decrLine :: Turtle -> Turtle

Decrement line length (ll) by dividing by line scalar (ls).

forward :: Turtle -> Turtle

Move loc of Turtle by ll on current hdg.

push :: Turtle -> Turtle

Push Turtle onto stk.

pop :: Turtle -> Turtle

Fetch Turtle from stk.

stepTurtle :: (t -> Pt -> Pt -> b) -> Turtle -> t -> (Turtle, b)

Given state processing function f, a Turtle and an initial state, step Turtle and state.