47 lines
1.3 KiB
Common Lisp
47 lines
1.3 KiB
Common Lisp
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(defpackage :advtrains-helpers
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(:use :cl :parse-float)
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(:nicknames :helpers :aux)
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(:export :parse-lua-number :adj-vector-of
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:v3d :make-v3d :v3d-x :v3d-y :v3d-z :v3d-p
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:string-to-v3d :hash-table-to-v3d))
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(in-package :aux)
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(defmacro adj-vector-of (element-type)
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`(make-array 0
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:element-type ,element-type
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:adjustable t
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:fill-pointer t))
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(deftype lua-number () '(or float integer))
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(defmacro parse-lua-number (str)
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(alexandria:with-gensyms (n)
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`(let ((,n (parse-float ,str :type 'real)))
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(if (typep ,n 'ratio) (coerce ,n 'float) ,n))))
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(defstruct v3d
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(x 0 :type lua-number)
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(y 0 :type lua-number)
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(z 0 :type lua-number))
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(defmethod print-object ((obj v3d) stream)
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(with-accessors ((x v3d-x) (y v3d-y) (z v3d-z)) obj
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(print-unreadable-object (obj stream)
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(format stream "~a,~a,~a" x y z))))
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(defmacro string-to-v3d (str)
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(alexandria:with-gensyms (xs ys zs)
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`(cl-ppcre:register-groups-bind
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(,xs ,ys ,zs)
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("^\\((-?[0-9]+),(-?[0-9]+),(-?[0-9]+)\\)$" ,str)
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(make-v3d :x (parse-integer ,xs)
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:y (parse-integer ,ys)
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:z (parse-integer ,zs)))))
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(defmacro hash-table-to-v3d (ht)
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(alexandria:once-only
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(ht)
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`(make-v3d :x (gethash "x" ,ht)
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:y (gethash "y" ,ht)
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:z (gethash "z" ,ht))))
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