Added the trunk/branches/tags directories at repository root, and moved previous root into trunk/

git-svn-id: https://sfml.svn.sourceforge.net/svnroot/sfml/trunk@1002 4e206d99-4929-0410-ac5d-dfc041789085

ruby/RubySFML/RubySFML.rb

@@ -0,0 +1,83 @@
+require "RubySFML.so"
+
+module SFML
+
+	# A simple class for dealing with tiled sprites.
+	class TSprite < Sprite
+		# Use to set/get the tile column
+		attr_accessor :tx
+		# Use to set/get the tile row
+		attr_accessor :ty
+
+		# Pass in the image, the tile width, and the tile height.
+		def initialize(image, w, h)
+			super(image)
+			@tx, @ty, @tw, @th = 0, 0, w, h
+			setRotationCenter(@tw/2, @th/2)
+		end
+
+		# Overrides Sprite::render to call setSubRect() for you to choose a
+		# tile based on tx and ty before the sprite is rendered.
+		def render(win)
+			l, t = @tw*@tx, @th*@ty
+			setSubRect(IntRect.new(l, t, l+@tw, t+@th))
+			super(win)
+		end
+	end
+
+	# A simple class for dealing with sprites and 2D velocity/acceleration
+	class VSprite < TSprite
+		# Use to get/set the x component of the velocity vector
+		attr_accessor :vx
+		# Use to get/set the y component of the velocity vector
+		attr_accessor :vy
+
+		# Pass in the image, the tile width, and the tile height.
+		def initialize(image, w, h)
+			super(image, w, h)
+			@vx = @vy = 0.0
+		end
+
+		# Specify a number of degrees to rotate left
+		def turn_left(degrees) rotate(degrees); end
+		# Specify a number of degrees to rotate right
+		def turn_right(degrees) rotate(-degrees); end
+
+		# Returns the magnitude of the velocity vector
+		def speed
+			return Math.sqrt(@vx**2 + @vy**2)
+		end
+
+		# Returns the direction of the velocity vector
+		def direction
+			s = speed
+			return [@vx/s, @vy/s]
+		end
+
+		# Accelerates the sprite in the direction vector v by the amount "thrust"
+		def accelerate(v, thrust)
+			@vx += v[0] * thrust
+			@vy += v[1] * thrust
+		end
+
+		# Scales the speed component of the velocity
+		def scale_speed(amount)
+			@vx *= amount
+			@vy *= amount
+		end
+
+		# Moves the sprite in the direction vector v by the amound d
+		def move(v, d)
+			self.x += v[0] * d
+			self.y += v[1] * d
+		end
+
+		# Updates the sprite's position based on its velocity and its time slice
+		def update(time)
+			self.x += @vx * time
+			self.y += @vy * time
+		end
+	end
+
+end
+