blob: fdf253ee87787124a735d3b14c5fc78437134010 (
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
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
;;; Chickadee Game Toolkit
;;; Copyright © 2016 David Thompson <davet@gnu.org>
;;;
;;; Chickadee is free software: you can redistribute it and/or modify
;;; it under the terms of the GNU General Public License as published
;;; by the Free Software Foundation, either version 3 of the License,
;;; or (at your option) any later version.
;;;
;;; Chickadee is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;;; General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with this program. If not, see
;;; <http://www.gnu.org/licenses/>.
(define-module (chickadee)
#:use-module (gl)
#:use-module (sdl2)
#:use-module (sdl2 events)
#:use-module (sdl2 input text)
#:use-module (chickadee color)
#:use-module (chickadee math matrix)
#:use-module (chickadee window)
#:use-module (chickadee render)
#:use-module (chickadee render gl)
#:use-module (chickadee render gpu)
#:use-module (chickadee render viewport)
#:export (load-hook
update-hook
before-draw-hook
draw-hook
after-draw-hook
quit-hook
key-press-hook
key-release-hook
text-input-hook
mouse-press-hook
mouse-release-hook
mouse-move-hook
controller-add-hook
controller-remove-hook
controller-press-hook
controller-release-hook
controller-move-hook
run-game
abort-game
time))
(define load-hook (make-hook 0))
(define update-hook (make-hook 1))
(define before-draw-hook (make-hook 0))
(define after-draw-hook (make-hook 0))
(define draw-hook (make-hook 1))
(define quit-hook (make-hook 0))
(define key-press-hook (make-hook 4))
(define key-release-hook (make-hook 3))
(define text-input-hook (make-hook 1))
(define mouse-press-hook (make-hook 4))
(define mouse-release-hook (make-hook 3))
(define mouse-move-hook (make-hook 5))
(define controller-add-hook (make-hook 1))
(define controller-remove-hook (make-hook 1))
(define controller-press-hook (make-hook 2))
(define controller-release-hook (make-hook 2))
(define controller-move-hook (make-hook 3))
(define open-controller (@@ (chickadee input controller) open-controller))
(define close-controller (@@ (chickadee input controller) close-controller))
(define lookup-controller (@@ (chickadee input controller) lookup-controller))
(define game-loop-prompt-tag (make-prompt-tag 'game-loop))
(define* (run-game #:key
(window-title "Chickadee!")
(window-width 640)
(window-height 480)
window-fullscreen?
(update-hz 60))
(sdl-init)
(start-text-input)
(let ((window (open-window #:title window-title
#:width window-width
#:height window-height
#:fullscreen? window-fullscreen?)))
(define (process-event event)
(cond
((quit-event? event)
(run-hook quit-hook))
((keyboard-down-event? event)
(run-hook key-press-hook
(keyboard-event-key event)
(keyboard-event-scancode event)
(keyboard-event-modifiers event)
(keyboard-event-repeat event)))
((keyboard-up-event? event)
(run-hook key-release-hook
(keyboard-event-key event)
(keyboard-event-scancode event)
(keyboard-event-modifiers event)))
((text-input-event? event)
(run-hook text-input-hook (text-input-event-text event)))
((mouse-button-down-event? event)
(run-hook mouse-press-hook
(mouse-button-event-button event)
(mouse-button-event-clicks event)
(mouse-button-event-x event)
(mouse-button-event-y event)))
((mouse-button-up-event? event)
(run-hook mouse-release-hook
(mouse-button-event-button event)
(mouse-button-event-x event)
(mouse-button-event-y event)))
((mouse-motion-event? event)
(run-hook mouse-move-hook
(mouse-motion-event-x event)
(mouse-motion-event-y event)
(mouse-motion-event-x-rel event)
(mouse-motion-event-y-rel event)
(mouse-motion-event-buttons event)))
((and (controller-device-event? event)
(eq? (controller-device-event-action event) 'added))
(run-hook controller-add-hook
(open-controller (controller-device-event-which event))))
((and (controller-device-event? event)
(eq? (controller-device-event-action event) 'removed))
(let ((controller (lookup-controller
(controller-device-event-which event))))
(run-hook controller-remove-hook controller)
(close-controller controller)))
((controller-button-down-event? event)
(run-hook controller-press-hook
(lookup-controller
(controller-button-event-which event))
(controller-button-event-button event)))
((controller-button-up-event? event)
(run-hook controller-release-hook
(lookup-controller
(controller-button-event-which event))
(controller-button-event-button event)))
((controller-axis-event? event)
(run-hook controller-move-hook
(lookup-controller
(controller-axis-event-which event))
(controller-axis-event-axis event)
(/ (controller-axis-event-value event) 32768.0)))))
(with-window window
(let ((update-interval (round (/ 1000 update-hz)))
(default-viewport
(make-viewport 0 0 window-width window-height))
(default-projection
(orthographic-projection 0 window-width window-height 0 0 1)))
(call-with-prompt game-loop-prompt-tag
(lambda ()
;; Catch SIGINT and kill the loop.
(sigaction SIGINT
(lambda (signum)
(abort-game)))
(run-hook load-hook)
(let loop ((previous-time (sdl-ticks))
(lag 0))
(let* ((current-time (sdl-ticks))
(delta (- current-time previous-time)))
(let update-loop ((lag (+ lag delta)))
(if (>= lag update-interval)
(begin
;; Process all pending events.
(let loop ((event (poll-event)))
(when event
(process-event event)
(loop (poll-event))))
;; Advance the simulation.
(run-hook update-hook update-interval)
(update-loop (- lag update-interval))
;; Free any GPU resources that have been GC'd.
(gpu-reap!))
(begin
;; Render a frame.
(run-hook before-draw-hook)
(with-viewport default-viewport
(with-projection default-projection
(run-hook draw-hook (/ lag update-interval))))
(swap-buffers window)
(run-hook after-draw-hook)
(loop current-time lag)))))))
(lambda (cont callback)
#f))))))
(define (abort-game)
(abort-to-prompt game-loop-prompt-tag #f))
(define (time)
(sdl-ticks))
|
