(display-scene
(window ((resolution '(640 480)))
- (bitmap "hello-world.bmp")))
+ (image "hello-world.bmp")))
(display-scene
(window ((resolution '(640 480))
(when-quit counter-quit))
- (bitmap "x.bmp")))
+ (image "x.bmp")))
(define get-pressed-scene #f)
(set! get-pressed-scene
- (let* ((up (bitmap "up.bmp"))
- (down (bitmap "down.bmp"))
- (left (bitmap "left.bmp"))
- (right (bitmap "right.bmp"))
- (press (bitmap "press.bmp"))
+ (let* ((up (image "up.bmp"))
+ (down (image "down.bmp"))
+ (left (image "left.bmp"))
+ (right (image "right.bmp"))
+ (press (image "press.bmp"))
(actived press))
(lambda ()
(if (any-key-down?)
(set! actived press))))
actived)))
-(define press (bitmap "press.bmp"))
-
(display-scene
(window ((resolution '(640 480)))
(lambda ()
(display-scene
(window ((resolution '(640 480)))
- (stretch
- (bitmap "stretch.bmp")
+ (scale
+ (image "stretch.bmp")
2)))
--- /dev/null
+#!/usr/bin/env guile
+!#
+
+;;; Gacela, a GNU Guile extension for fast games development
+;;; Copyright (C) 2017 by Javier Sancho Fernandez <jsf at jsancho dot org>
+;;;
+;;; This program 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.
+;;;
+;;; This program 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/>.
+
+(use-modules (gacela))
+
+(define (tick) (* 3000000 (get-internal-real-time)))
+(define (waggle) (* 200 (cos (* pi (tick)))))
+(define (wiggle) (* 300 (sin (* pi (tick)))))
+
+(display-scene
+ (window ((resolution '(640 480)))
+ (move (image "homer.png")
+ wiggle 0)))
+
+(display-scene
+ (window ((resolution '(640 480)))
+ (move (image "marge.png")
+ 0 waggle)))
#:use-module ((sdl2 render) #:prefix sdl2:)
#:use-module ((sdl2 surface) #:prefix sdl2:)
#:use-module (gl)
- #:export (bitmap
- move-xy
- stretch))
+ #:export (image
+ move
+ scale))
-(define (bitmap filename)
+(define (calculate proc-or-value)
+ (if (procedure? proc-or-value)
+ (proc-or-value)
+ proc-or-value))
+
+(define (image filename)
(make-scene
- "bitmap"
+ "image"
(let ((image (sdl2:load-image filename))
(texture #f)
(w/2 0)
(gl-vertex (- w/2) (- h/2) 0))
(gl-disable (oes-framebuffer-object texture-2d))))))
-(define (move-xy x y scene)
- (define (to-integer n)
- (inexact->exact (round n)))
+(define* (move scene x y #:optional (z 0))
(make-scene
- "move-xy"
+ "move"
(lambda ()
- (let ((xy (list (to-integer (if (procedure? x) (x) x))
- (to-integer (if (procedure? y) (y) y)))))
- (display-scene scene #:xy xy)))))
+ (gl-translate (calculate x)
+ (calculate y)
+ (calculate z))
+ (display-scene scene))))
-(define* (stretch scene x #:optional (y x) (z y))
+(define* (scale scene x #:optional (y x) (z y))
(make-scene
- "stretch"
+ "scale"
(lambda ()
(gl-scale x y z)
(display-scene scene))))