Player stuff

app.rb

@@ -3,8 +3,8 @@ require "gosu"
 load "physobj.rb"
 
 class Window < Gosu::Window
-	attr_accessor :freeze, :caption, :physobjs, :planets
-	attr_reader :width, :height
+	attr_accessor :freeze, :caption, :physobjs, :planets, :controller
+	attr_reader :width, :height, :fonts
 
 	def initialize(title, width, height, physobjs = [], planets = [])
 		super width, height
@@ -14,19 +14,38 @@ class Window < Gosu::Window
 		@physobjs = physobjs
 		@planets = planets
 
-		@font = Gosu::Font.new(self, Gosu::default_font_name, 12)
-		@font2 = Gosu::Font.new(self, Gosu::default_font_name, 18)
+		@font = Gosu::Font.new(self, Gosu::default_font_name, 14)
+		@font2 = Gosu::Font.new(self, Gosu::default_font_name, 20)
+
+		@fonts = {
+			normal: @font,
+			big: @font2
+		}
+
 		@freeze = false
+		@controller = nil
 	end
 
 	def button_up(id)
 		super id
 
+		if( @controller != nil ) then
+			@controller.button_up(id)
+		end
+
 		if( id == Gosu::KbEscape ) then
 			@freeze = !@freeze
 		end
 	end
 
+	def button_down(id)
+		super id
+
+		if( @controller != nil ) then
+			@controller.button_down(id)
+		end
+	end
+
 	def update
 		if( !@freeze ) then
 			@physobjs.each do |obj| 
@@ -40,20 +59,18 @@ class Window < Gosu::Window
 	end
 
 	private def generate_debug_string(obj)
-		return "\n#{obj.name}\nVel:    #{obj.vel.round(4)} (#{obj.vel.magnitude.round(1)})\nAccel:    #{obj.accel.round(4)} (#{obj.accel.magnitude.round(4)})\nPos:    #{obj.pos.round(4)}\n"
+		return "\n#{obj.name}\nVel: #{obj.vel.round(4)} (#{obj.vel.magnitude.round(1)})\nAccel: #{obj.accel.round(4)} (#{obj.accel.magnitude.round(4)})\nPos: #{obj.pos.round(4)}\n"
 	end
 
 	def draw
-		status_text = @freeze ? "FROZEN (Escape to unfreeze)" : "(Escape to freeze)"
-		@font2.draw(status_text, 0, 0, 1, 1.0, 1.0, Gosu::Color::WHITE)
+		@font2.draw("Frozen: #{@freeze}", 0, 0, 1, 1.0, 1.0, Gosu::Color::WHITE)
 
 		@physobjs.each do |obj| 
 			obj.render
 			obj.draw_vector(obj.vel, 10)
 			obj.draw_vector(obj.accel, 500, 0xff_aaffaa)
 			obj.render_path
-
-			@font.draw(self.generate_debug_string(obj), obj.pos[0], obj.pos[1], 1, 1.0, 1.0, Gosu::Color.argb(0xee_aaaaff))
+			obj.draw_direction
 		end
 
 		@planets.each do |planet|
@@ -67,14 +84,18 @@ window = Window.new("Physics!", 1600, 900)
 
 planet = Planet.new("Sol", window, 0xff_ffffaa, 1e2, 20, 120)
 planet.pos = Vector[800, 450]
+planet.show_info = true
 
-cube = PhysCube.new("Cube", window, 8, 8)
+cube = Player.new("Alpha", window, 8, 8)
+cube.show_info = true
 cube.pos = Vector[800, 450 + 200]
 cube.vel = Vector[2.5, 0]
+window.controller = cube
 
-cube2 = PhysCube.new("Cube2", window, 8, 8)
-cube2.pos = Vector[800, 450 - 200]
+cube2 = PhysCube.new("Beta", window, 8, 8)
+cube2.pos = Vector[800, 450 + 300]
 cube2.vel = Vector[-2.5, 0]
+
 planet.orbit([cube, cube2])
 
 window.planets << planet

physobj.rb

@@ -4,7 +4,7 @@ load "gosu_plugin.rb"
 GRAV_CONSTANT = 1e+1
 
 class PhysObj
-	attr_accessor :world, :saved_pos, :pos, :vel, :accel, :x, :y
+	attr_accessor :world, :saved_pos, :pos, :vel, :accel, :x, :y, :show_info, :angle
 	attr_reader :name
 	def initialize(name, world)
 		@name = name
@@ -14,6 +14,8 @@ class PhysObj
 		@accel = Vector.zero(2)
 		@x, @y = 0, 0
 		@saved_pos = []
+		@show_info = false
+		@angle = 0
 	end
 
 	def tick
@@ -34,26 +36,14 @@ class PhysObj
 		end
 	end
 
-end
-
-
-class PhysCube < PhysObj
-	attr_reader :width, :height
-	def initialize(name, world, width, height, color=0xff_ffffff, ela=-0.8)
-		super name, world
-
-		@width, @height = width, height
-		@color = Gosu::Color.argb(color)
-		@ela = ela
-	end
-
-	def render
-		x, y = self.pos[0], self.pos[1]
-		Gosu.draw_quad(x, y, @color, x + self.width, y, @color, x, y + self.height, @color, x + self.width, y + self.height, @color)
+	private def debug_string
+		return "\n#{self.name}\nVel: #{self.vel.magnitude.round(1)} #{self.vel.round(4)}\nAccel: #{self.accel.magnitude.round(4)} #{self.accel.round(4)}\nPos: #{self.pos.round(4)}\nAngle: #{self.angle.round(1)} deg\n"
 	end
 
-	def physics
-		self.tick
+	def render(x_offset=0, y_offset=0, color=Gosu::Color.argb(0xaa_2222ff))
+		if( @show_info ) then
+			self.world.fonts[:normal].draw(self.debug_string, self.pos[0] + x_offset, self.pos[1] + y_offset, 1, 1.0, 1.0, color)
+		end
 	end
 
 	def draw_vector(vec, scale=2, color=0xaf_ffaaaa)
@@ -75,6 +65,32 @@ class PhysCube < PhysObj
 		end
 	end
 
+	def draw_direction
+		rads = (self.angle * Math::PI) / 180
+		dir_vec = Vector[Math::cos(rads), Math::sin(rads)]
+		self.draw_vector(dir_vec, 25, 0xaf_aaaaff)
+	end
+end
+
+
+class PhysCube < PhysObj
+	attr_reader :width, :height
+	def initialize(name, world, width, height, color=0xff_ffffff)
+		super name, world
+
+		@width, @height = width, height
+		@color = Gosu::Color.argb(color)
+	end
+
+	def render
+		super 0, 0, @color
+		x, y = self.pos[0], self.pos[1]
+		Gosu.draw_quad(x, y, @color, x + self.width, y, @color, x, y + self.height, @color, x + self.width, y + self.height, @color)
+	end
+
+	def physics
+		self.tick
+	end
 end
 
 
@@ -107,7 +123,28 @@ class Planet < PhysObj
 		end
 	end
 
+	private def debug_string
+		return "\n#{self.name}\nPos: #{self.pos.round(4)}\nMass: #{self.mass.round(4)}\nRadius: #{self.radius.round(4)} p\nGravity: #{(self.mass*GRAV_CONSTANT).round(2)} p/r^2"
+	end
+
 	def render
+		super @radius*3, @radius*3, Gosu::Color.argb(0xff_ffffff)
 		Gosu.draw_circle(self.pos[0], self.pos[1], @radius, @color, 0, @circle_thickness)
 	end
 end
+
+
+class Player < PhysCube
+	def initialize(name, world, width, height, color=0xff_aaaaaa)
+		super name, world, width, height, color
+	end
+
+	def button_up(id)
+	end
+
+	def button_down(id)
+		if( id == Gosu::KbDown ) then
+			puts("DOWN")
+		end
+	end
+end