63 lines
1.7 KiB
Racket
63 lines
1.7 KiB
Racket
#lang racket
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(require pict3d
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pict3d/universe
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"pict3d-lib.rkt")
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(struct scene-state
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(done? dx dy sun-dir)
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#:transparent)
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(define init-scene-state
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(scene-state #f 0 0 (dir 1 (- 3) 0)))
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(current-material (material #:ambient 0.1
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#:diffuse 0.6
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#:specular 0.3
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#:roughness 0.5))
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(define (mesh)
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(with-color (rgba-hex "05ffa1")
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(let* ([lines
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(for*/list ([i (in-range -10 10)]
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[j (in-range 0 10)])
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(move (cylinder (pos (- 0.1) (- 0.1) -5)
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(pos 0.1 0.1 10))
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(dir i 0 j)))]
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[lines-frozen (freeze (apply combine lines))])
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(combine lines-frozen
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(move (rotate-y lines-frozen 90)
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(dir -7 0 5))))))
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(define scene
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(rotate-y (cube (pos 0 0 0) 1) 30))
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(define (make-sunlight d)
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(sunlight
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d
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(emitted "white" 1/2)))
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(define (on-draw s n t)
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(combine (basis 'camera
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(point-at (pos 0 4 -6) origin))
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(make-sunlight (scene-state-sun-dir s))
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(mesh)
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(move-y (rotate-x scene (/ t 20)) 2)))
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(define (on-key s n t k)
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(case k
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[("escape" "q") (struct-copy scene-state s [done? #t])]
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[("right") (struct-copy scene-state s
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[sun-dir (dir+ +x (scene-state-sun-dir s))])]
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[("left") (struct-copy scene-state s
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[sun-dir (dir+ -x (scene-state-sun-dir s))])]
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[else s]))
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(define (stop-state? s n t) (scene-state-done? s))
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(big-bang3d init-scene-state
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#:on-draw on-draw
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#:on-key on-key
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#:stop-state? stop-state?
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#:name "Outrun")
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