fixed arrow physics

code/canvas.lua

@@ -0,0 +1,49 @@
+Canvas = {class = "Canvas"}
+
+function Canvas:New(name)
+  local o = {}
+  o.name = name
+  o.width = game.width/game.scale
+  o.height = game.height/game.scale
+  o.canvas = love.graphics.newCanvas(o.width,o.height)
+
+  setmetatable(o, self)
+	self.__index = self
+  Canvas[name] = o
+end
+
+function Canvas:Recreate()
+	self.canvas:release()
+	self = Canvas:New(self.name)
+end
+
+function Canvas:Reset()
+	love.graphics.setCanvas(Canvas[self.name].canvas)
+  love.graphics.setBlendMode("replace")
+	love.graphics.setColor(0,0,0,0)
+	love.graphics.rectangle(
+		"fill",
+		0,
+		0,
+		self.width,
+		self.height
+	)
+	love.graphics.setCanvas()
+end
+
+function Canvas:DrawingStart()
+	self:Reset()
+	love.graphics.setCanvas(Canvas[self.name].canvas)
+end
+
+function Canvas:DrawingEnd()
+	love.graphics.setCanvas()
+	love.graphics.setBlendMode("alpha")
+  love.graphics.setColor(1,1,1,1)
+end
+
+function Canvas:Draw()
+  love.graphics.draw(self.canvas)
+end
+
+require "code/canvasses/darkness"