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|
;;;; turtle-system.lisp
(in-package #:l-system)
;;;(matrix* translate rotate scale)
(export 'f)
(defun turtle-system (list radians)
(iter (with seed = sb-cga:+identity-matrix+)
(with vec = (sb-cga:vec 1.0 0.0 0.0))
(with angle = radians)
(for item in list)
(case item
((f)
(collect
(setf seed
(matrix* seed
(translate vec)))))
((j)
(setf seed
(matrix* seed
(translate vec))))
((+)
(setf vec
(transform-point (vec 0.0 0.0 0.0)
(matrix*
(rotate-around (vec 0.0 0.0 1.0) angle)
(translate vec)))))
((-)
(setf vec
(transform-point (vec 0.0 0.0 0.0)
(matrix*
(rotate-around (vec 0.0 0.0 1.0) (- angle))
(translate vec)))))
((&)
(setf vec
(transform-point (vec 0.0 0.0 0.0)
(matrix*
(rotate-around (vec 0.0 1.0 0.0) angle)
(translate vec)))))
((^)
(setf vec
(transform-point (vec 0.0 0.0 0.0)
(matrix*
(rotate-around (vec 0.0 1.0 0.0) (- angle))
(translate vec)))))
((\ )
(setf vec
(transform-point (vec 0.0 0.0 0.0)
(matrix*
(rotate-around (vec 1.0 0.0 0.0) angle)
(translate vec)))))
((/)
(setf vec
(transform-point (vec 0.0 0.0 0.0)
(matrix*
(rotate-around (vec 1.0 0.0 0.0) (- angle))
(translate vec)))))
#|
(([) )
((]) )
|#
)))
(defun temp (list)
(iter (for matrix in list)
(appending
(concatenate 'list
(sb-cga:transform-point (vec 0.0 0.0 0.0)
matrix)))))
|
