30 lines
1.1 KiB
Racket
30 lines
1.1 KiB
Racket
#lang racket/base
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(require racket/match
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"../common/math.rkt")
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(provide (all-defined-out))
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(struct shape (alpha center) #:transparent)
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(struct polygon shape (vs normal pen-color pen-width pen-style brush-color brush-style) #:transparent)
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(struct rectangle shape (rect pen-color pen-width pen-style brush-color brush-style) #:transparent)
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(struct line shape (v1 v2 pen-color pen-width pen-style) #:transparent)
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(struct text shape (anchor angle dist str font-size font-family color) #:transparent)
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(struct glyph shape (symbol size pen-color pen-width pen-style brush-color brush-style) #:transparent)
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(struct tick-glyph shape (radius angle pen-color pen-width pen-style) #:transparent)
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(struct arrow-glyph shape (start end pen-color pen-width pen-style) #:transparent)
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(struct shapes shape (list) #:transparent)
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(define (draw-before? cs1 cs2)
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(match-define (cons s1 (vector x1 y1 z1)) cs1)
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(match-define (cons s2 (vector x2 y2 z2)) cs2)
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(or (y1 . > . y2)
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(and (y1 . = . y2)
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(if (z1 . = . z2)
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(and (polygon? s1) (not (polygon? s2)))
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(z1 . < . z2)))))
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(define (depth-sort s+cs)
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(sort s+cs draw-before?))
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