lib/tatty/anim.rb in petli-0.0.3 vs lib/tatty/anim.rb in petli-0.0.4

@@ -1,19 +1,61 @@
 module Tatty
   class Anim
-    def initialize(atlas, frame: 0, rate: 2)
+    attr_reader :width, :height, :loop, :rate, :name
+
+    def self.from_atlas(filepath, name: :default)
+      Atlas.new(filepath)[name]
+    end
+
+    def initialize(atlas, width:, height:, **kargs)
       @atlas = atlas
-      @frame = frame
-      @rate = rate
+      @rate = kargs[:speed] || 2
+      @loop = kargs[:loop] || false
+      if kargs[:loop_for].nil?
+        @loop_for = -1
+      else
+        @loop = false
+        @loop_for_start = kargs[:loop_for] || -1
+        @loop_for = @loop_for_start
+      end
+      @name = kargs[:name]
+      @width = width
+      @height = height
+      reset
     end
 
+    def reset
+      @frame = 0
+      @loop_for = @loop_for_start if @loop_for == 0
+    end
+
     def step
       @frame += 1
-      @frame = 0 if self.frame >= @atlas.count
-      @atlas[self.frame]
+      if rate_frame >= @atlas.count
+        reset if self.loop
+        @loop_for -= 1 if @loop_for > 0
+        true
+      else
+        false
+      end
     end
 
-    def frame
+    def display
+      @atlas[rate_frame]
+    end
+
+    def next
+      step
+      display
+    end
+
+    def loop
+      @loop || @loop_for > 0
+    end
+
+    private
+
+    def rate_frame
       (@frame/@rate).ceil
     end
   end
 end