Initial support for touch callbacks, GuiState now emulates a mouse left click on tap

.gitignore

@@ -1,3 +1,4 @@
+/.idea
 /.bundle/
 /.yardoc
 /_yardoc/

Gemfile.lock

@@ -1,25 +1,37 @@
 PATH
   remote: .
   specs:
-    cyberarm_engine (0.24.5)
+    cyberarm_engine (0.30.0)
       gosu (~> 1.1)
 
 GEM
   remote: https://rubygems.org/
   specs:
-    gosu (1.4.6)
-    minitest (5.25.5)
-    rake (13.2.1)
+    ffi (1.17.4-x86_64-linux-gnu)
+    ffi (1.17.4-x86_64-linux-musl)
+    gosu (1.5.0-x86_64-linux)
+      ffi (~> 1.12)
+    minitest (5.27.0)
+    rake (13.4.2)
 
 PLATFORMS
-  x64-mingw-ucrt
-  x86_64-linux
+  x86_64-linux-gnu
+  x86_64-linux-musl
 
 DEPENDENCIES
-  bundler (~> 2.2)
+  bundler (~> 4)
   cyberarm_engine!
   minitest (~> 5.0)
   rake (~> 13.0)
 
+CHECKSUMS
+  bundler (4.1.0.beta1) sha256=8a2dac8ca276ff4eff5efc2c6457b0044080fc1e431534ad7c5cc6187232b800
+  cyberarm_engine (0.30.0)
+  ffi (1.17.4-x86_64-linux-gnu) sha256=9d3db14c2eae074b382fa9c083fe95aec6e0a1451da249eab096c34002bc752d
+  ffi (1.17.4-x86_64-linux-musl) sha256=3fdf9888483de005f8ef8d1cf2d3b20d86626af206cbf780f6a6a12439a9c49e
+  gosu (1.5.0-x86_64-linux)
+  minitest (5.27.0) sha256=2d3b17f8a36fe7801c1adcffdbc38233b938eb0b4966e97a6739055a45fa77d5
+  rake (13.4.2) sha256=cb825b2bd5f1f8e91ca37bddb4b9aaf345551b4731da62949be002fa89283701
+
 BUNDLED WITH
-   2.6.8
+  4.1.0.beta1

cyberarm_engine.gemspec

@@ -28,9 +28,8 @@ Gem::Specification.new do |spec|
   spec.require_paths = %w[lib assets]
 
   spec.add_dependency "gosu", "~> 1.1"
-  # spec.add_dependency "ffi", :platforms => [:mswin, :mingw] # Required by Clipboard on Windows
 
-  spec.add_development_dependency "bundler", "~> 2.2"
+  spec.add_development_dependency "bundler", "~> 4"
   spec.add_development_dependency "minitest", "~> 5.0"
   spec.add_development_dependency "rake", "~> 13.0"
 end

lib/cyberarm_engine.rb

@@ -42,6 +42,22 @@ require_relative "cyberarm_engine/console/command"
 require_relative "cyberarm_engine/console/subcommand"
 require_relative "cyberarm_engine/console/commands/help_command"
 
+require_relative "cyberarm_engine/pathfinding/graph"
+require_relative "cyberarm_engine/pathfinding/graphs/grid"
+require_relative "cyberarm_engine/pathfinding/graph_search"
+require_relative "cyberarm_engine/pathfinding/graph_searches/breadth_first_search"
+require_relative "cyberarm_engine/pathfinding/graph_searches/dijkstra_search"
+require_relative "cyberarm_engine/pathfinding/graph_searches/astar_search"
+
+require_relative "cyberarm_engine/ecs/entity"
+require_relative "cyberarm_engine/ecs/component"
+require_relative "cyberarm_engine/ecs/system"
+require_relative "cyberarm_engine/ecs/entity_store"
+require_relative "cyberarm_engine/ecs/components/position"
+require_relative "cyberarm_engine/ecs/components/velocity"
+require_relative "cyberarm_engine/ecs/components/render_2d"
+require_relative "cyberarm_engine/ecs/components/team"
+
 require_relative "cyberarm_engine/ui/dsl"
 
 require_relative "cyberarm_engine/ui/theme"

lib/cyberarm_engine/ecs/component.rb

@@ -0,0 +1,119 @@
+module CyberarmEngine
+  module ECS
+    # Components MUST not have "logic," only data.
+    class Component
+      InternalEncoder = Data.define(:pack, :min, :max, :encoder, :decoder)
+
+      # Note: all encoders use big endian
+      INTERNAL_ENCODING_DATA = {
+        float: InternalEncoder.new("g", -Float::INFINITY, Float::INFINITY, nil, nil),
+        double: InternalEncoder.new("G", -Float::INFINITY, Float::INFINITY, nil, nil),
+        int8: InternalEncoder.new("c", -128, 127, nil, nil),
+        uint8: InternalEncoder.new("C", 0, 255, nil, nil),
+        int16: InternalEncoder.new("s>", -32_768, 32_767, nil, nil),
+        uint16: InternalEncoder.new("n", 0, 65_535, nil, nil),
+        int32: InternalEncoder.new("l>", -2_147_483_648, 2_147_483_647, nil, nil),
+        uint32: InternalEncoder.new("N", 0, 4_294_967_295, nil, nil),
+        int64: InternalEncoder.new("q>", -9_223_372_036_854_775_808, 9_223_372_036_854_775_807, nil, nil),
+        uint64: InternalEncoder.new("Q>", 0, 18_446_744_073_709_551_615, nil, nil),
+        string: InternalEncoder.new("Z", nil, nil, nil, nil),
+        vector_float: InternalEncoder.new("g4", nil, nil, ->(v) { [v.x, v.y, v.z, v.w] }, ->(v, a) { v.x = a[0]; v.y = a[1]; v.z = a[2]; v.w = a[4] }),
+        vector_double: InternalEncoder.new("G4", nil, nil, ->(v) { [v.x, v.y, v.z, v.w] }, ->(v, a) { v.x = a[0]; v.y = a[1]; v.z = a[2]; v.w = a[4] }),
+        vector_int8: InternalEncoder.new("c4", nil, nil, ->(v) { [v.x, v.y, v.z, v.w] }, ->(v, a) { v.x = a[0]; v.y = a[1]; v.z = a[2]; v.w = a[4] }),
+        vector_int16: InternalEncoder.new("s>4", nil, nil, ->(v) { [v.x, v.y, v.z, v.w] }, ->(v, a) { v.x = a[0]; v.y = a[1]; v.z = a[2]; v.w = a[4] }),
+        vector_int32: InternalEncoder.new("l>4", nil, nil, ->(v) { [v.x, v.y, v.z, v.w] }, ->(v, a) { v.x = a[0]; v.y = a[1]; v.z = a[2]; v.w = a[4] }),
+      }.freeze
+
+      @identifier = nil
+      @values = []
+
+      def self.register_value(type, name, value, encoder = INTERNAL_ENCODING_DATA[type])
+        pp [type, name, value, encoder]
+      end
+
+      def self.register_custom_value(type, name, value, packed, encoder, decoder)
+        pp [type, name, value, packed, encoder, decoder]
+      end
+
+      def self.identifier(value = nil)
+        unless value
+          value = [File.basename(__FILE__).bytes.each_slice(4).map(&:sum).sum^0xffffffff].pack("N").unpack1("N")
+        end
+
+        @identifier = value
+      end
+
+      def self.float(name, value = 0.0)
+        register_value(:float, name, value)
+      end
+
+      def self.double(name, value = 0.0)
+        register_value(:double, name, value)
+      end
+
+      def self.int8(name, value = 0)
+        register_value(:int8, name, value)
+      end
+
+      def self.uint8(name, value = 0)
+        register_value(:uint8, name, value)
+      end
+
+      def self.int16(name, value = 0)
+        register_value(:int16, name, value)
+      end
+
+      def self.uint16(name, value = 0)
+        register_value(:uint16, name, value)
+      end
+
+      def self.int32(name, value = 0)
+        register_value(:int32, name, value)
+      end
+
+      def self.uint32(name, value = 0)
+        register_value(:uint32, name, value)
+      end
+
+      def self.int64(name, value = 0)
+        register_value(:int64, name, value)
+      end
+
+      def self.uint64(name, value = 0)
+        register_value(:uint64, name, value)
+      end
+
+      def self.string(name, value = "")
+        register_value(:string, name, value)
+      end
+
+      def self.vector_float(name, value = CyberarmEngine.new(0.0, 0.0, 0.0, 0.0))
+        register_value(:vector_float, name, value)
+      end
+
+      def self.vector_double(name, value = CyberarmEngine.new(0.0, 0.0, 0.0, 0.0))
+        register_value(:vector_double, name, value)
+      end
+
+      def self.vector_int8(name, value = CyberarmEngine.new(0, 0, 0, 0))
+        register_value(:vector_int8, name, value)
+      end
+
+      def self.vector_int16(name, value = CyberarmEngine.new(0, 0, 0, 0))
+        register_value(:vector_int16, name, value)
+      end
+
+      def self.vector_int32(name, value = CyberarmEngine.new(0, 0, 0, 0))
+        register_value(:vector_int32, name, value)
+      end
+
+      def self.custom(name, value, pack, encoder, decoder)
+        register_value(:custom, name, value, pack, encoder, decoder)
+      end
+
+      def self.custom_unserializable(name, value)
+        register_value(:custom, name, value)
+      end
+    end
+  end
+end

lib/cyberarm_engine/ecs/components/position.rb

@@ -0,0 +1,19 @@
+module CyberarmEngine
+  module ECS
+    class Component
+      class Position < Component
+        TYPE = 0x00
+
+        attr_reader :position
+
+        def initialize(position:)
+          unless position.is_a?(CyberarmEngine::Vector)
+            raise "Position must be a CyberarmEngine::Vector, got #{position.class}"
+          end
+
+          @position = position
+        end
+      end
+    end
+  end
+end

lib/cyberarm_engine/ecs/components/render_2d.rb

@@ -0,0 +1,24 @@
+module CyberarmEngine
+  module ECS
+    class Component
+      class Render2D < Component
+        TYPE = 0xf0
+
+        attr_reader :image, :scale, :center
+
+        def initialize(image:, scale: CyberarmEngine::Vector.new(1.0, 1.0),
+                       center: CyberarmEngine::Vector.new(0.5, 0.5))
+          raise "Image must be a Gosu::Image, got #{image.class}" unless image.is_a?(Gosu::Image)
+          raise "Scale must be a CyberarmEngine::Vector, got #{scale.class}" unless scale.is_a?(CyberarmEngine::Vector)
+          unless center.is_a?(CyberarmEngine::Vector)
+            raise "Center must be a CyberarmEngine::Vector, got #{center.class}"
+          end
+
+          @image = image
+          @scale = scale
+          @center = center
+        end
+      end
+    end
+  end
+end

lib/cyberarm_engine/ecs/components/team.rb

@@ -0,0 +1,17 @@
+module CyberarmEngine
+  module ECS
+    class Component
+      class Team < Component
+        TYPE = 0x03
+
+        attr_accessor :team
+
+        def initialize(team:)
+          raise "Team must be an Integer, got #{team.class}" unless team.is_a?(Integer)
+
+          @team = team
+        end
+      end
+    end
+  end
+end

lib/cyberarm_engine/ecs/components/velocity.rb

@@ -0,0 +1,19 @@
+module CyberarmEngine
+  module ECS
+    class Component
+      class Velocity < Component
+        TYPE = 0x01
+
+        attr_reader :velocity
+
+        def initialize(velocity:)
+          unless velocity.is_a?(CyberarmEngine::Vector)
+            raise "Velocity must be a CyberarmEngine::Vector, got #{velocity.class}"
+          end
+
+          @velocity = velocity
+        end
+      end
+    end
+  end
+end

lib/cyberarm_engine/ecs/entity.rb

@@ -0,0 +1,35 @@
+module CyberarmEngine
+  module ECS
+    class Entity
+      attr_reader :entity_id, :entity_components
+
+      def initialize(id:)
+        @entity_id = id
+        # there are more cache friendly ways to implement component storage/lookup but right now this is "good enough."
+        @entity_components = []
+      end
+
+      def add_component(component)
+        raise "Component already exists on entity!" if @entity_components.find { |c| c.is_a?(component) }
+
+        @entity_components << component
+      end
+
+      def component(component)
+        @entity_components.find { |c| c.is_a?(component) }
+      end
+
+      def components(components)
+        components.each do |c|
+          return false unless @entity_components.include? { |comp| c.is_a?(comp) }
+        end
+
+        true
+      end
+
+      def remove_component(component)
+        @entity_components.delete_if { |c| c.is_a?(component) }
+      end
+    end
+  end
+end

lib/cyberarm_engine/ecs/entity_store.rb

@@ -0,0 +1,56 @@
+module CyberarmEngine
+  module ECS
+    class EntityStore
+      MAX_ENTITY_ID = 4_294_967_295
+
+      def initialize
+        @current_entity_id = -1
+        @entities = []
+
+        @systems = [
+          System::Movement,
+          System::Render2D
+        ]
+      end
+
+      def create_entity(components)
+        ent = Entity.new(id: next_entity_id)
+
+        components.each do |component|
+          ent.add_component(component)
+        end
+
+        @entities << ent
+
+        ent
+      end
+
+      def find_entity(id)
+        @entities.find { |e| e.id == id }
+      end
+
+      def entities_with(components)
+        @entities.select { |e| e.components(components) }
+      end
+
+      def remove_entity(entity)
+        @entities.delete_if { |e| e == entity }
+      end
+
+      def remove_entities(entities)
+        @entities.delete_if { |e| entities.include?(e) }
+      end
+
+      def remove_all_entities
+        @entities.clear
+      end
+
+      def next_entity_id
+        # NOTE: we'll be sending entity IDs as uint32's (4 bytes with MAX value of MAX_ENTITY_ID [4.29 billion])
+        raise "Next entity ID exceeds maximium value!" if @current_entity_id + 1 > MAX_ENTITY_ID
+
+        @current_entity_id += 1
+      end
+    end
+  end
+end

lib/cyberarm_engine/ecs/system.rb

@@ -0,0 +1,14 @@
+module CyberarmEngine
+  module ECS
+    class System
+      # Array of required components for this system
+      def truple
+        []
+      end
+
+      def update(entity); end
+
+      def fixed_update(entity); end
+    end
+  end
+end

lib/cyberarm_engine/ecs/systems/movement.rb

@@ -0,0 +1,18 @@
+module CyberarmEngine
+  module ECS
+    class System
+      class Movement < System
+        def truple
+          [
+            Component::Position,
+            Component::Velocity
+          ]
+        end
+
+        def update(entity_store); end
+
+        def fixed_update(entity_store); end
+      end
+    end
+  end
+end

lib/cyberarm_engine/ecs/systems/render_2d.rb

@@ -0,0 +1,16 @@
+module CyberarmEngine
+  module ECS
+    class System
+      class Render < System
+        def truple
+          [
+            Component::Position,
+            Component::Render
+          ]
+        end
+
+        def draw(entity_store); end
+      end
+    end
+  end
+end

lib/cyberarm_engine/game_state.rb

@@ -33,6 +33,9 @@ module CyberarmEngine
       @timers.delete_if(&:dead?)
     end
 
+    def fixed_update(dt)
+    end
+
     def needs_redraw?
       true
     end
@@ -50,6 +53,18 @@ module CyberarmEngine
     def gamepad_disconnected(index)
     end
 
+    def touch_began(touch)
+    end
+
+    def touch_moved(touch)
+    end
+
+    def touch_ended(touch)
+    end
+
+    def touch_cancelled(touch)
+    end
+
     def gain_focus
     end
 

lib/cyberarm_engine/pathfinding/graph.rb

@@ -0,0 +1,64 @@
+module CyberarmEngine
+  module Pathfinding
+    class Graph
+      class Node
+        KEY_FORMAT = "%s:%s:%s".freeze
+
+        attr_reader :x, :y, :z, :cost, :key, :edge_nodes
+
+        def initialize(x:, y:, z: 0, cost: 0)
+          @x = x
+          @y = y
+          @z = z
+          @cost = cost
+
+          @key = format(KEY_FORMAT, @x, @y, @z).freeze
+
+          @edge_nodes = []
+        end
+
+        def add_edge_node(node)
+          index = @edge_nodes.find_index { |n| n.key == node.key }
+
+          return if index
+
+          @edge_nodes.push(node)
+        end
+
+        def remove_edge_node(node)
+          index = @edge_nodes.find_index { |n| n.key == node.key }
+
+          return unless index
+
+          @edge_nodes.delete(index)
+        end
+
+        def inspect
+          format "#<%<class>s:%<id>#018x @key=%<key>s @cost=%<cost>s @edge_nodes=%<edge_nodes>s>",
+                 class: self.class,
+                 id: object_id << 1,
+                 key: key.inspect,
+                 cost: cost.inspect,
+                 edge_nodes: edge_nodes.map { |n| n&.key }
+        end
+      end
+
+      def initialize(nodes: {})
+        @nodes = nodes
+      end
+
+      def node(key)
+        @nodes[key]
+      end
+
+      def node_at(x, y, z = 0)
+        key = format(Node::KEY_FORMAT, x, y, z)
+        @nodes[key]
+      end
+
+      def neighbors(node)
+        node.edge_nodes
+      end
+    end
+  end
+end

lib/cyberarm_engine/pathfinding/graph_search.rb

@@ -0,0 +1,6 @@
+module CyberarmEngine
+  module Pathfinding
+    class GraphSearch
+    end
+  end
+end

lib/cyberarm_engine/pathfinding/graph_searches/astar_search.rb

@@ -0,0 +1,6 @@
+module CyberarmEngine
+  module Pathfinding
+    class AStarSearch < GraphSearch
+    end
+  end
+end

lib/cyberarm_engine/pathfinding/graph_searches/breadth_first_search.rb

@@ -0,0 +1,27 @@
+module CyberarmEngine
+  module Pathfinding
+    class BreadthFirstSearch < GraphSearch
+      def self.search(graph:, start:, goal: nil)
+        frontier = []
+        came_from = {}
+
+        frontier.push(start)
+        came_from[start.key] = start
+
+        while(current = frontier.shift)
+          # early exit if we reach our goal
+          break if current == goal
+
+          graph.neighbors(current).each do |neighbor|
+            next if came_from[neighbor.key]
+
+            frontier.push(neighbor)
+            came_from[neighbor.key] = current
+          end
+        end
+
+        came_from
+      end
+    end
+  end
+end

lib/cyberarm_engine/pathfinding/graph_searches/dijkstra_search.rb

@@ -0,0 +1,6 @@
+module CyberarmEngine
+  module Pathfinding
+    class DijkstraSearch < GraphSearch
+    end
+  end
+end

lib/cyberarm_engine/pathfinding/graphs/grid.rb

@@ -0,0 +1,52 @@
+module CyberarmEngine
+  module Pathfinding
+    class Grid < Graph
+      def add_node(x:, y:, z: 0, cost: 0, replace: false)
+        key = format(Node::KEY_FORMAT, x, y, z)
+        node = @nodes[key]
+
+        raise "Node at: #{key} already exists! (#{node})" if node && !replace
+
+        node = Node.new(x: x, y: y, z: z, cost: cost)
+        @nodes[key] = node
+
+        update_node_edge_nodes(node)
+        node
+      end
+
+      def remove_node(node)
+        update_node_edge_nodes(node, remove_node: true)
+
+        @nodes.delete(node.key)
+      end
+
+      def update_node_edge_nodes(node, remove_node: false)
+        x = node.x
+        y = node.y
+        z = node.z
+
+        # add node to neighbors
+        # 2D
+        left = @nodes[format(Node::KEY_FORMAT, x - 1, y, z)]
+        right = @nodes[format(Node::KEY_FORMAT, x + 1, y, z)]
+        top = @nodes[format(Node::KEY_FORMAT, x, y - 1, z)]
+        bottom = @nodes[format(Node::KEY_FORMAT, x, y + 1, z)]
+        # 3D
+        front = @nodes[format(Node::KEY_FORMAT, x, y, z - 1)]
+        back = @nodes[format(Node::KEY_FORMAT, x, y, z + 1)]
+
+        possible_edge_nodes = [left, right, top, bottom, front, back]
+
+        if remove_node
+          possible_edge_nodes.each { |n| n&.remove_edge_node(node) }
+        else
+          possible_edge_nodes.each { |n| n&.add_edge_node(node) }
+        end
+      end
+
+      def update_edge_nodes
+        @nodes.each { |k, n| update_node_edge_nodes(n) }
+      end
+    end
+  end
+end

lib/cyberarm_engine/ui/elements/check_box.rb

@@ -46,7 +46,7 @@ module CyberarmEngine
       end
 
       def value=(bool)
-        old_value = this.value
+        old_value = self.value
 
         @toggle_button.value = bool
         publish(:changed, bool) if bool != old_value

lib/cyberarm_engine/ui/elements/slider.rb

@@ -94,7 +94,7 @@ module CyberarmEngine
       end
 
       def value=(n)
-        old_value = this.value
+        old_value = self.value
 
         @value = n
         position_handle

lib/cyberarm_engine/ui/gui_state.rb

@@ -33,6 +33,9 @@ module CyberarmEngine
       @pending_element_recalculate_requests = []
       @hit_elements = []
 
+      @touch_down_position = {}
+      @min_touch_drag_distance = 50
+
       @needs_repaint = false
 
       @menu = nil
@@ -227,6 +230,31 @@ module CyberarmEngine
       @page&.update
     end
 
+    def touch_began(touch)
+      @touch_down_position[touch.id] = touch
+    end
+
+    def touch_moved(touch)
+      # TODO: Support scrolling containers and dragging elements
+    end
+
+    def touch_ended(touch)
+      touch_down_pos = @touch_down_position[touch.id]
+      distance = Vector.new(touch_down_pos.x, touch_down_pos.y).distance(Vector.new(touch.x, touch.y))
+
+      # emulate mouse click
+      if distance < @min_touch_drag_distance
+        button_down(Gosu::MS_LEFT)
+        button_up(Gosu::MS_LEFT)
+      end
+
+      @touch_down_position.delete(touch.id)
+    end
+
+    def touch_cancelled(touch)
+      @touch_down_position.delete(touch.id)
+    end
+
     def button_down(id)
       super
 

lib/cyberarm_engine/version.rb

@@ -1,4 +1,4 @@
 module CyberarmEngine
   NAME    = "InDev".freeze
-  VERSION = "0.25.1".freeze
+  VERSION = "0.30.0".freeze
 end

lib/cyberarm_engine/window.rb

@@ -6,6 +6,9 @@ module CyberarmEngine
     SAMPLES = {}
     SONGS = {}
 
+    FixedUpdateProperties = Data.define(:fixed_timestep, :fixed_timestep_int_ms, :max_timestep)
+    FixedUpdate = Struct.new(:milliseconds, :accumulator, :interpolation, :alpha)
+
     attr_accessor :show_cursor, :show_stats_plotter
     attr_writer :exit_on_opengl_error
     attr_reader :last_frame_time, :delta_time, :states
@@ -28,7 +31,7 @@ module CyberarmEngine
       @@instance
     end
 
-    def initialize(width: 800, height: 600, fullscreen: false, update_interval: 1000.0 / 60, resizable: false, borderless: false)
+    def initialize(width: 800, height: 600, fullscreen: false, update_interval: 1000.0 / 60, resizable: false, borderless: false, fixed_update_timestep: 1.0 / 125, fixed_update_timestep_int_ms: 8, fixed_max_timestep: 1.0 / 60)
       @show_cursor = false
       @has_focus = false
       @show_stats_plotter = false
@@ -46,6 +49,9 @@ module CyberarmEngine
       preload_default_shaders if respond_to?(:preload_default_shaders)
       @stats_plotter = Stats::StatsPlotter.new(2, 28) # FIXME: Make positioning easy
 
+      @fixed_timestep_data = FixedUpdateProperties.new(1.0 / 125, 8, 1.0 / 60)
+      @fixed_update = FixedUpdate.new(0, 0.0, 0.0, 1.0)
+
       setup
     end
 
@@ -79,11 +85,44 @@ module CyberarmEngine
 
       Stats.frame.start_timing(:update)
       current_state&.update
+      Stats.frame.start_timing(:fixed_update)
+      fixed_update
+      Stats.frame.end_timing(:fixed_update)
       Stats.frame.end_timing(:update)
 
       Stats.frame.start_timing(:interframe_sleep) unless needs_redraw?
     end
 
+    def fixed_update
+      @delta_time = @fixed_timestep_data.max_timestep if @delta_time > @fixed_timestep_data.max_timestep
+      @fixed_update.accumulator += @delta_time
+
+      while @fixed_update.accumulator >= @fixed_timestep_data.fixed_timestep
+        @fixed_update.accumulator -= @fixed_timestep_data.fixed_timestep
+
+        @fixed_update.alpha = @fixed_update.accumulator / @fixed_timestep_data.fixed_timestep
+
+        @fixed_update.milliseconds += @fixed_timestep_data.fixed_timestep_int_ms
+        current_state&.fixed_update(@fixed_timestep_data.fixed_timestep)
+      end
+    end
+
+    def fixed_update_milliseconds
+      @fixed_update.milliseconds
+    end
+
+    def fixed_update_accumulator
+      @fixed_update.accumulator
+    end
+
+    def fixed_update_interpolation
+      @fixed_update.interpolation
+    end
+
+    def fixed_update_alpha
+      @fixed_update.alpha
+    end
+
     def needs_cursor?
       @show_cursor
     end
@@ -104,6 +143,22 @@ module CyberarmEngine
       current_state&.gamepad_disconnected(index)
     end
 
+    def touch_began(touch)
+      current_state&.touch_began(touch)
+    end
+
+    def touch_moved(touch)
+      current_state&.touch_moved(touch)
+    end
+
+    def touch_ended(touch)
+      current_state&.touch_ended(touch)
+    end
+
+    def touch_cancelled(touch)
+      current_state&.touch_cancelled(touch)
+    end
+
     def gain_focus
       @has_focus = true