43 lines
1.3 KiB
Racket
43 lines
1.3 KiB
Racket
#lang racket/base
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(require racket/contract
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"geometry.rkt")
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#|
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inet, cidr = family:byte bits:byte is_cidr:byte addrlen:byte addr:be-integer
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is_cidr is ignored
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box = x1 y1 x2 y2 (all float8)
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circle = x y rad (all float8)
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line = not yet implemented
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lseg = x1 y1 x2 y2 (all float8)
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path = closed?:byte #points:int4 (x y : float8)*
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point = x y (all float8)
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polygon = #points:int4 (x y : float8)*
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|#
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(struct pg-box (ne sw)
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#:transparent
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#:guard (lambda (ne sw _n)
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(let ([x1 (point-x ne)]
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[x2 (point-x sw)]
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[y1 (point-y ne)]
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[y2 (point-y sw)])
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(values (point (max x1 x2) (max y1 y2))
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(point (min x1 x2) (min y1 y2))))))
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(struct pg-circle (center radius)
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#:transparent
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#:guard (lambda (center radius _n)
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(values center (exact->inexact radius))))
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(struct pg-path (closed? points)
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#:transparent
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#:guard (lambda (closed? points _n)
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(values (and closed? #t)
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points)))
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(provide/contract
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[struct pg-box ([ne point?] [sw point?])]
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[struct pg-circle ([center point?] [radius (and/c real? (not/c negative?))])]
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[struct pg-path ([closed? any/c] [points (listof point?)])])
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