26 lines
1.1 KiB
Racket
26 lines
1.1 KiB
Racket
#lang scheme
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(require plot)
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(require mzlib/class plot/plot-extend)
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; (number -> number) mumbo-jumbo -> 2d-renderer
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(define-plot-type dashed-line
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fun 2dview (x-min x-max) ((samples 100) (segments 20) (color 'red) (width 1))
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(let* ((dash-size (/ (- x-max x-min) segments))
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(x-lists (build-list (/ segments 2)
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(lambda (index)
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(x-values
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(/ samples segments)
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(+ x-min (* 2 index dash-size))
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(+ x-min (* (add1 ( * 2 index)) dash-size)))))))
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(send* 2dview
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(set-line-color color)
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(set-line-width width))
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(for-each (lambda (dash)
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(send 2dview plot-line
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(map (lambda (x) (vector x (fun x))) dash)))
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x-lists)))
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;
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(plot (dashed-line (lambda (x) x) (color 'red)))
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(plot3d (surface (lambda (x y) (* (sin x) (sin y)))))
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