blob: 357a7c735af50f11af7037a1db411c80e2eac13d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
(use-modules (chickadee)
(chickadee math)
(chickadee math matrix)
(chickadee math vector)
(chickadee graphics engine)
(chickadee graphics model)
(chickadee graphics text)
(ice-9 format))
(define projection (perspective-projection (/ pi 3) (/ 4.0 3.0) 0.1 500.0))
(define translation (make-identity-matrix4))
(define view-matrix (make-identity-matrix4))
(define model-matrix (make-identity-matrix4))
(define position (vec3 0.0 0.0 0.0))
(define velocity (vec3 0.0 0.0 0.0))
(define model #f)
(define text-position (vec2 4.0 464.0))
(define text "")
(define y-rotation 0.0)
(define rotate-paused? #f)
(define (reset-position)
(set-vec3! position 0.0 0.0 -4.0))
(define (load)
(set! model (load-gltf "models/Suzanne/Suzanne.gltf"))
(reset-position))
(define (draw alpha)
(with-projection projection
(draw-model model
#:model-matrix model-matrix
#:view-matrix view-matrix
#:camera-position position))
(draw-text text text-position))
(define (update dt)
;; Update camera position
(set-vec3! velocity
(+ (if (key-pressed? 'd) -1.0 0.0)
(if (key-pressed? 'a) 1.0 0.0))
0.0
(+ (if (key-pressed? 's) -1.0 0.0)
(if (key-pressed? 'w) 1.0 0.0)))
(vec3-normalize! velocity)
(vec3-mult! velocity 0.1)
(vec3-add! position velocity)
(set! text (format #f "(~6,2f, ~6,2f, ~6,2f)"
(vec3-x position)
(vec3-y position)
(vec3-z position)))
;; Compute new view matrix
(look-at! view-matrix
position
(vec3+ position (vec3 0.0 0.0 1.0))
(vec3 0.0 1.0 0.0))
;; Rotate the model about the y-axis
(unless rotate-paused?
(set! y-rotation (+ y-rotation 0.03))
(matrix4-rotate-y! model-matrix y-rotation)))
(define (key-press key modifiers repeat?)
(case key
((q)
(abort-game))
((r)
(reset-position))
((space)
(set! rotate-paused? (not rotate-paused?)))))
(run-game #:window-title "3D!"
#:load load
#:draw draw
#:update update
#:key-press key-press)
|
