-
Notifications
You must be signed in to change notification settings - Fork 16
/
15-rotation-and-flipping.lisp
87 lines (79 loc) · 3.2 KB
/
15-rotation-and-flipping.lisp
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
(defpackage #:sdl2-tutorial-15-rotation-and-flipping
(:use :cl)
(:export :run)
(:import-from :sdl2-tutorial-utils :asset-pathname))
(in-package #:sdl2-tutorial-15-rotation-and-flipping)
(defparameter *screen-width* 640)
(defparameter *screen-height* 480)
(defclass tex ()
((renderer
:initarg :renderer
:initform (error "Must supply a renderer"))
(width
:accessor tex-width
:initform 0 )
(height
:accessor tex-height
:initform 0)
(texture
:accessor tex-texture
:initform nil)))
(defun load-texture-from-file (renderer filename)
(let ((tex (make-instance 'tex :renderer renderer)))
(with-slots (renderer texture width height) tex
(let ((surface (sdl2-image:load-image filename)))
(setf width (sdl2:surface-width surface))
(setf height (sdl2:surface-height surface))
(sdl2:set-color-key surface :true (sdl2:map-rgb (sdl2:surface-format surface)
0 #xFF #xFF))
(setf texture (sdl2:create-texture-from-surface renderer surface))))
tex))
(defun set-color (tex r g b)
(sdl2:set-texture-color-mod (tex-texture tex) r g b))
(defun render (tex x y &key clip angle center flip)
(with-slots (renderer texture width height) tex
(sdl2:render-copy-ex renderer
texture
:source-rect clip
:dest-rect (sdl2:make-rect x
y
(if clip (sdl2:rect-width clip) width)
(if clip (sdl2:rect-height clip) height))
:angle angle
:center center
:flip (list flip))))
(defmacro with-window-renderer ((window renderer) &body body)
`(sdl2:with-init (:video)
(sdl2:with-window (,window
:title "SDL2 Tutorial 15"
:w *screen-width*
:h *screen-height*
:flags '(:shown))
(sdl2:with-renderer (,renderer ,window :index -1 :flags '(:accelerated))
,@body))))
(defun run ()
(with-window-renderer (window renderer)
(sdl2-image:init '(:png))
(let ((texture (load-texture-from-file renderer (asset-pathname "assets/15/arrow.png")))
(flip :none)
(degrees 0)
(delta 60))
(sdl2:with-event-loop (:method :poll)
(:quit () t)
(:keydown
(:keysym keysym)
(case (sdl2:scancode keysym)
(:scancode-a (decf degrees delta))
(:scancode-d (incf degrees delta))
(:scancode-q (setf flip :horizontal))
(:scancode-w (setf flip :none))
(:scancode-e (setf flip :vertical))))
(:idle ()
(sdl2:set-render-draw-color renderer #xFF #xFF #xFF #xFF)
(sdl2:render-clear renderer)
(render texture
(round (/ (- *screen-width* (tex-width texture)) 2))
(round (/ (- *screen-height* (tex-height texture)) 2))
:angle degrees
:flip flip)
(sdl2:render-present renderer))))))