animation: added entity for playing animations

entities/animation.lua

@@ -0,0 +1,36 @@
+Class = require 'hump.class'
+require 'entities/entity'
+
+Animation = Class{
+    __includes = Entity,
+
+    frames = {},
+
+    curFrame = 0
+
+    init = function(self, x, y, level, basename, numFrames, fps)
+        Entity.init(self, x, y, level)
+
+        for frame = 0,numFrames - 1 do
+            self.frames[frame] = love.graphics.newImage(string.format(basename, frame))
+        end
+
+        self.angle = 0
+        self.width = self.frames[0].getWidth();
+        self.height = self.frames[0].getHeight();
+        self.quad = love.graphics.newQuad(0, 0, self.width, self.height, self.width, self.height)
+    end;
+
+    draw = function(self)
+        if self.health > 0 then
+            local img = self.frames[math.floor(curFrame)]
+            if img then
+                love.graphics.draw(self.frames[0], self.quad, 0, 0, self.angle, 1, 1, self.width / 2, self.width / 2)
+            end
+        end
+    end;
+
+    update = function(self, dt)
+        curFrame += dt * fps
+    end;
+}