From: Javier Sancho <jsf@jsancho.org>
Date: Thu, 20 Apr 2017 23:41:06 +0000 (+0200)
Subject: Merge branch 'release/0.5'
X-Git-Url: https://git.jsancho.org/?p=gacela.git;a=commitdiff_plain;h=6cc07be7e64e74546bf295ad42b5d2475624e3fc;hp=8875fdf238b6ae7fa548937f103142def7b6c19f

Merge branch 'release/0.5'
---

diff --git a/examples/01-hello-world/01-hello-world.scm b/examples/01-hello-world/01-hello-world.scm
index 61263f1..2a18040 100644
--- a/examples/01-hello-world/01-hello-world.scm
+++ b/examples/01-hello-world/01-hello-world.scm
@@ -21,4 +21,4 @@
 
 (display-scene
  (window ((resolution '(640 480)))
-   (bitmap "hello-world.bmp")))
+   (image "hello-world.bmp")))
diff --git a/examples/02-event-driven-programming/02-event-driven-programming.scm b/examples/02-event-driven-programming/02-event-driven-programming.scm
index b151233..a75eddf 100644
--- a/examples/02-event-driven-programming/02-event-driven-programming.scm
+++ b/examples/02-event-driven-programming/02-event-driven-programming.scm
@@ -31,4 +31,4 @@
 (display-scene
  (window ((resolution '(640 480))
 	  (when-quit counter-quit))
-   (bitmap "x.bmp")))
+   (image "x.bmp")))
diff --git a/examples/03-key-presses/03-key-presses.scm b/examples/03-key-presses/03-key-presses.scm
index 06fa186..ed8a65d 100644
--- a/examples/03-key-presses/03-key-presses.scm
+++ b/examples/03-key-presses/03-key-presses.scm
@@ -23,11 +23,11 @@
 (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?)
@@ -43,8 +43,6 @@
 		 (set! actived press))))
       actived)))
 
-(define press (bitmap "press.bmp"))
-
 (display-scene
  (window ((resolution '(640 480)))
    (lambda ()
diff --git a/examples/04-stretch-images/04-stretch-images.scm b/examples/04-stretch-images/04-stretch-images.scm
index e23daef..6676e1d 100644
--- a/examples/04-stretch-images/04-stretch-images.scm
+++ b/examples/04-stretch-images/04-stretch-images.scm
@@ -21,6 +21,6 @@
 
 (display-scene
  (window ((resolution '(640 480)))
-   (stretch
-    (bitmap "stretch.bmp")
+   (scale
+    (image "stretch.bmp")
     2)))
diff --git a/examples/05-animations/05-animations.scm b/examples/05-animations/05-animations.scm
new file mode 100644
index 0000000..eea8812
--- /dev/null
+++ b/examples/05-animations/05-animations.scm
@@ -0,0 +1,34 @@
+#!/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)))
diff --git a/examples/05-animations/homer.png b/examples/05-animations/homer.png
new file mode 100644
index 0000000..485e01e
Binary files /dev/null and b/examples/05-animations/homer.png differ
diff --git a/examples/05-animations/marge.png b/examples/05-animations/marge.png
new file mode 100644
index 0000000..576092b
Binary files /dev/null and b/examples/05-animations/marge.png differ
diff --git a/gacela/image.scm b/gacela/image.scm
index 1fa861f..e6c8f4e 100644
--- a/gacela/image.scm
+++ b/gacela/image.scm
@@ -23,13 +23,18 @@
   #: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)
@@ -52,19 +57,18 @@
          (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))))