97 lines
3.3 KiB
Racket
Executable File
97 lines
3.3 KiB
Racket
Executable File
#!/bin/sh
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#| -*- scheme -*-
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exec gracket "$0" "$@"
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|#
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#lang scheme
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(require plot file/md5 scheme/runtime-path)
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(define-runtime-path here "./")
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(define (read-file file)
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(with-input-from-file file (lambda () (read-bytes (file-size file)))))
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(define-syntax run-test
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(syntax-rules ()
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[(_ description (plot args ...) file-name)
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(let* ([result-file-name
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(build-path here (string-append file-name "-out.png"))]
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[expected-file-name
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(build-path here (string-append file-name ".png"))])
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(plot args ... #:out-file result-file-name)
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;; WILL COMPARE by MD5 hash.
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(printf "testing \"~a\" ... " description)
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(if (equal? (md5 (read-file result-file-name))
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(md5 (read-file expected-file-name)))
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(begin (display "passed\n") (delete-file result-file-name))
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(printf "failed! expected results in ~a, plot produced results in ~a\n"
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expected-file-name
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result-file-name)))]))
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(run-test "Line"
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(plot (line (lambda (x) x) #:color 'red))
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"red-identity")
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(run-test "Vector Field"
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(plot (vector-field (gradient (lambda (x y) (* (sin x) (cos y))))
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#:samples 25)
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#:title "gradient field of F(x,y) = sin(x) * sin(y)")
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"vector-field")
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(define (trig x y) (* (sin x) (sin y)))
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(run-test "Shading"
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(plot (shade trig)
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#:x-min -1.5 #:x-max 1.5 #:y-min -1.5 #:y-max 1.5
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#:title "shdade of F(x,y) = sin(x) * sin(y)")
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"shade")
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(run-test "Contours"
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(plot (contour trig)
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#:x-min -1.5 #:x-max 1.5 #:y-min -1.5 #:y-max 1.5
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#:title "contours of F(x,y) = sin(x) * sin(y)")
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"contours")
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(run-test "Mix of all three"
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(plot (mix (shade trig)
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(contour trig)
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(vector-field (gradient trig) #:samples 25))
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#:x-min -1.5 #:x-max 1.5 #:y-min -1.5 #:y-max 1.5
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#:title "gradient field & shade & contours")
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"mix")
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(run-test "3d mesg"
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(plot3d (mesh3d trig)
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#:x-min -3.5 #:x-max 3.5
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#:y-min -3.5 #:y-max 3.5
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#:z-min -1.0 #:z-max 1.5
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#:bgcolor '(0 0 0) #:fgcolor '(255 0 0))
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"3d-mesh")
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(require 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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(run-test "Simple plot-extend"
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(plot (dashed-line (lambda (x) x) [color 'red]))
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"dashed-line")
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(run-test "canvas sizing"
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(plot (line sin) #:height 100 #:width 100)
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"size")
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