1 files changed, 152 insertions, 0 deletions
diff --git a/not/Sprite.lua b/not/Sprite.lua
new file mode 100644
index 0000000..25d85f1
--- /dev/null
+++ b/not/Sprite.lua
@@ -0,0 +1,152 @@
+--- `Sprite`
+-- Abstract class for drawable animated entities.
+Sprite = {
+	animations =--[[table with animations]]nil,
+	current =--[[animations.default]]nil,
+	image =--[[love.graphics.newImage]]nil,
+	frame = 1,
+	delay = .1,
+}
+Sprite.__index = Sprite
+
+--[[ Constructor of `Sprite`.
+function Sprite:new (imagePath)
+	local o = setmetatable({}, self)
+	o:init(imagePath)
+	return o
+end
+]]
+
+-- Cleans up reference to image on deletion.
+function Sprite:delete ()
+	self.image = nil
+end
+
+-- Initializes new Sprite instance.
+function Sprite:init (imagePath)
+	if type(imagePath) == "string" then
+		self:setImage(Sprite.newImage(imagePath))
+	end
+end
+
+-- Creates new Image object from path. Key-colours two shades of green. Static.
+function Sprite.newImage (path)
+	local imagedata = love.image.newImageData(path)
+	local transparency = function(x, y, r, g, b, a)
+		if (r == 0 and g == 128 and b == 64) or
+		   (r == 0 and g == 240 and b ==  6) then
+			a = 0
+		end
+		return r, g, b, a
+	end
+	imagedata:mapPixel(transparency)
+	local image = love.graphics.newImage(imagedata)
+	return image
+end
+
+-- Sets an Image as an image.
+function Sprite:setImage (image)
+	self.image = image
+end
+-- Returns current image Image.
+function Sprite:getImage ()
+	return self.image
+end
+
+-- Sets new animations list.
+function Sprite:setAnimationsList (t)
+	if t then
+		self.animations = t
+		self:setAnimation("default")
+	end
+end
+
+-- Sets current animation by table key.
+function Sprite:setAnimation (animation)
+	self.frame = 1
+	self.delay = Sprite.delay -- INITIAL from metatable
+	self.current = self.animations[animation]
+end
+-- Returns current animation table.
+function Sprite:getAnimation ()
+	return self.current
+end
+
+-- Get frame quad for drawing.
+function Sprite:getQuad ()
+	if self.animations and self.current then
+		return self.current[self.frame]
+	end
+end
+
+-- TODO: Following five methods are stupid, do something about them!
+-- Sprite can't be moved by itself. Positioning should be handled by children's methods.
+function Sprite:getPosition ()
+	return 0,0
+end
+-- Sprite can't be rotated by itself. Rotation should be handled by children's methods.
+function Sprite:getAngle ()
+	return 0
+end
+-- Sprite can't be mirrored by itself. Mirroring should be handled by children's methods.
+function Sprite:getHorizontalMirror ()
+	return 1
+end
+function Sprite:getVerticalMirror ()
+	return 1
+end
+-- Sprite can't be offset by itself. Offsetting should be handled by children's methods.
+function Sprite:getOffset ()
+	return 0,0
+end
+
+-- Drawing self to LOVE2D buffer.
+-- If there is no Quad, it will draw entire image. It won't draw anything if there is no image.
+-- TODO: it doesn't follow same pattern as `not.Hero.draw`. It should implement so it can be called from `not.World`.
+-- TODO: change children if above changes are in effect: `not.Platform`, `not.Decoration`.
+function Sprite:draw (offset_x, offset_y, scale)
+	local offset_x = offset_x or 0
+	local offset_y = offset_y or 0
+
+	local i, q = self:getImage(), self:getQuad()
+	local x, y = self:getPosition()
+	local angle = self:getAngle()
+
+	local scaleX = self:getHorizontalMirror()*(scale or 1)
+	local scaleY = self:getVerticalMirror()*(scale or 1)
+
+	-- pixel grid ; `approx` selected to prevent floating characters on certain conditions
+	local approx = math.floor
+	if (y - math.floor(y)) > 0.5 then approx = math.ceil end
+	local draw_y = (approx(y) + offset_y) * scale
+	local draw_x = (math.floor(x) + offset_x) * scale
+
+	if i then
+		love.graphics.setColor(255,255,255,255)
+		if q then 
+			love.graphics.draw(i, q, draw_x, draw_y, angle, scaleX, scaleY, self:getOffset())
+		else 
+			love.graphics.draw(i, draw_x, draw_y, angle, scaleX, scaleY, self:getOffset())
+		end
+	end
+end
+
+-- Animation updating.
+function Sprite:update (dt)
+	if self.animations and self.current then
+		self.delay = self.delay - dt
+		if self.delay < 0 then
+			self.delay = self.delay + Sprite.delay -- INITIAL from metatable
+			self:goToNextFrame()
+		end
+	end
+end
+
+-- Moving to the next frame.
+function Sprite:goToNextFrame ()
+	if self.current.repeated or not (self.frame == self.current.frames) then
+		self.frame = (self.frame % self.current.frames) + 1
+	else
+		self:setAnimation("default")
+	end
+end
+\ No newline at end of file