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basic camera movement

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Dan Frumin
2019-12-28 15:56:39 +01:00
parent 86c1a85534
commit eba4fd5d5e
1 changed files with 20 additions and 5 deletions
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25
outrun.rkt
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@@ -5,11 +5,11 @@
"noise.rkt") "noise.rkt")
(struct scene-state (struct scene-state
(done? dx dy dsun) (done? dx dy dz dsun)
#:transparent) #:transparent)
(define init-scene-state (define init-scene-state
(scene-state #f 0 0 0)) (scene-state #f 0 0 0 0))
(current-material (material #:ambient 0.1 (current-material (material #:ambient 0.1
#:diffuse 0.6 #:diffuse 0.6
@@ -61,13 +61,20 @@
(angles->dir -30 (* 10 dsun)) (angles->dir -30 (* 10 dsun))
(emitted "white" 1/2))) (emitted "white" 1/2)))
;; Calculate camera position based on the state
(define (camera-position s)
(pos 0 (+ 4 (scene-state-dy s)) (- (scene-state-dz s) 4)))
;; Calculate camera direction based on the state
(define (camera-direction s)
(angles->dir -90 55))
(define (on-draw s n t) (define (on-draw s n t)
(combine (basis 'camera (combine (basis 'camera
(point-at (pos 0 4 -6) origin)) (point-at (camera-position s)
(camera-direction s)))
(make-sunlight (scene-state-dsun s)) (make-sunlight (scene-state-dsun s))
(mesh t) (mesh t)
;; (move-y (rotate-x scene (/ t 20)) 2) (move-y (scene t) 2)))
))
(define (on-key s n t k) (define (on-key s n t k)
(case k (case k
@@ -76,6 +83,14 @@
[dsun (add1 (scene-state-dsun s))])] [dsun (add1 (scene-state-dsun s))])]
[("left") (struct-copy scene-state s [("left") (struct-copy scene-state s
[dsun (sub1 (scene-state-dsun s))])] [dsun (sub1 (scene-state-dsun s))])]
[("up") (struct-copy scene-state s
[dy (+ (scene-state-dy s) 0.1)])]
[("down") (struct-copy scene-state s
[dy (- (scene-state-dy s) 0.1)])]
[("w") (struct-copy scene-state s
[dz (+ (scene-state-dz s) 0.1)])]
[("s") (struct-copy scene-state s
[dz (- (scene-state-dz s) 0.1)])]
[else s])) [else s]))
(define (stop-state? s n t) (scene-state-done? s)) (define (stop-state? s n t) (scene-state-done? s))