Add sprites

Also namespace `type_id` definitions

3 files changed, 85 insertions, 1 deletions

diff --git a/lib/ruby2d.rb b/lib/ruby2d.rb
index 342e03a..4e41d22 100644
--- a/lib/ruby2d.rb
+++ b/lib/ruby2d.rb
@@ -9,6 +9,7 @@ require 'ruby2d/rectangle'
 require 'ruby2d/square'
 require 'ruby2d/triangle'
 require 'ruby2d/image'
+require 'ruby2d/sprite'
 require 'ruby2d/text'
 require 'ruby2d/exceptions'
 require 'ruby2d/ruby2d'  # load native extension
diff --git a/lib/ruby2d/sprite.rb b/lib/ruby2d/sprite.rb
new file mode 100644
index 0000000..6e3eae4
--- /dev/null
+++ b/lib/ruby2d/sprite.rb
@@ -0,0 +1,83 @@
+# sprite.rb
+
+module Ruby2D
+  class Sprite
+    
+    attr_accessor :x, :y
+    
+    def initialize(x, y, path)
+      
+      unless File.exists? path
+        raise Error, "Cannot find image file `#{path}`"
+      end
+      
+      @type_id = 4
+      @x, @y, @path = x, y, path
+      @clip_x, @clip_y, @clip_w, @clip_h = 0, 0, 0, 0
+      @default = nil
+      @animations = {}
+      @current_animation = nil
+      @current_frame = 0
+      @current_frame_time = 0
+      
+      if defined? DSL
+        Application.add(self)
+      end
+    end
+    
+    def start(x, y, w, h)
+      @default = [x, y, w, h]
+      clip(x, y, w, h)
+    end
+    
+    def add(animations)
+      @animations.merge!(animations)
+    end
+    
+    def animate(animation)
+      if @current_animation != animation
+        @current_frame      = 0
+        @current_frame_time = 0
+        @current_animation  = animation
+      end
+      animate_frames(@animations[animation])
+    end
+    
+    def reset
+      clip(@default[0], @default[1], @default[2], @default[3])
+      @current_animation = nil
+    end
+    
+    def remove
+      if defined? DSL
+        Application.remove(self)
+      end
+    end
+    
+    private
+    
+    def clip(x, y, w, h)
+      @clip_x, @clip_y, @clip_w, @clip_h = x, y, w, h
+    end
+    
+    def animate_frames(frames)
+      if @current_frame_time < frames[@current_frame][4]
+        clip_with_current_frame(frames)
+        @current_frame_time += 1
+      else
+        @current_frame += 1
+        if @current_frame == frames.length
+          @current_frame = 0
+        end
+        clip_with_current_frame(frames)
+        @current_frame_time = 0
+      end
+    end
+    
+    def clip_with_current_frame(frames)
+      clip(frames[@current_frame][0], frames[@current_frame][1],
+           frames[@current_frame][2], frames[@current_frame][3])
+    end
+    
+  end
+end
diff --git a/lib/ruby2d/text.rb b/lib/ruby2d/text.rb
index 9ba4e41..dedfa39 100644
--- a/lib/ruby2d/text.rb
+++ b/lib/ruby2d/text.rb
@@ -13,7 +13,7 @@ module Ruby2D
         @font = resolve_path(font)
       end
       
-      @type_id = 4
+      @type_id = 5
       @x, @y, @size = x, y, size
       @text, @color = msg, c
       update_color(c)