From 59f5cb6c28399c84221b728daf4bd8461ab1e230 Mon Sep 17 00:00:00 2001
From: Colin Okay <colin@cicadas.surf>
Date: Fri, 1 Jul 2022 10:53:47 -0500
Subject: [add] sprite class and example

---
 examples/06-sprite.lisp | 96 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 examples/06-sprite.lisp

(limited to 'examples/06-sprite.lisp')

diff --git a/examples/06-sprite.lisp b/examples/06-sprite.lisp
new file mode 100644
index 0000000..2d737e5
--- /dev/null
+++ b/examples/06-sprite.lisp
@@ -0,0 +1,96 @@
+;;;; examples/06-sprite.lisp
+
+(defpackage #:ww.examples/6
+  (:use #:cl)
+  (:export #:start))
+
+(in-package #:ww.examples/6)
+
+(defclass sprite-example (ww::application) ())
+
+(defun set-key-if-not (sprite key )
+  (unless (eql key (ww::frameset-key sprite))
+    (setf (ww::runningp (ww::current-frameset sprite)) nil)
+    (setf (ww::frameset-key sprite) key))
+  (unless (ww::runningp (ww::current-frameset sprite)) 
+    (setf (ww::runningp (ww::current-frameset sprite)) t)))
+
+(define-symbol-macro +walking-speed+ 10)
+
+(ww::defhandler move-dude
+    (ww::on-keydown (target scancode)
+      (case scancode
+        (:scancode-left
+         (set-key-if-not target :left)
+         (decf (ww::x target) +walking-speed+))
+        (:scancode-right
+         (set-key-if-not target :right)
+         (incf (ww::x target) +walking-speed+))
+        (:scancode-up
+         (set-key-if-not target :back)
+         (incf (ww::y target) +walking-speed+))
+        (:scancode-down
+         (set-key-if-not target :front)
+         (decf (ww::y target) +walking-speed+)))))
+
+(ww::defhandler stand
+    (ww::on-keyup (target)
+      (let ((current
+              (ww::current-frameset target)))
+        (setf (ww::runningp current) nil
+              (ww::frameset-index current) 0))))
+
+
+(defmethod ww::boot ((app sprite-example))
+  (let* ((front
+           (ww::make-frameset
+            '("dude/Front_Stand.png"
+              "dude/Front_Left.png"
+              "dude/Front_Stand.png"
+              "dude/Front_Right.png")
+            :fps 3))
+         (back
+           (ww::make-frameset
+            '("dude/Back_Stand.png"
+              "dude/Back_Left.png"
+              "dude/Back_Stand.png"
+              "dude/Back_Right.png")
+            :fps 3))
+         (left
+           (ww::make-frameset
+            '("dude/Left_Stand.png"
+              "dude/Left_Left.png"
+              "dude/Left_Stand.png"
+              "dude/Left_Right.png")
+            :fps 3))
+         (right
+           (ww::make-frameset
+            '("dude/Right_Stand.png"
+              "dude/Right_Left.png"
+              "dude/Right_Stand.png"
+              "dude/Right_Right.png")
+            :fps 3))
+         (dude
+           (make-instance
+            'ww::sprite
+            :framesets (list :front front
+                             :back back
+                             :left left
+                             :right right)
+            :frameset-key :front)))
+
+    (ww::add-handler dude #'move-dude)
+    (ww::add-handler dude #'stand)
+    (ww::refocus-on dude)
+    (ww::add-unit app dude)))
+
+(defun start ()
+  (ww::start (make-instance
+              'sprite-example
+              :fps 30
+              :width 800
+              :height 600
+              :title "Wheelwork Example: An Animated Sprite"
+              :asset-root (merge-pathnames
+                           "examples/"
+                           (asdf:system-source-directory :wheelwork)))))
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