Updates, various.
- Naka has been split to a separate file for better readability.
- Naka::Noise2D added. Basically Perlin noise, but it adds a few APIs
to sum stacks of octaves and such. Generation from seed is still
missing even though it’s critical.
- An example map is generated using several Naka::Noise2D.
- Some assets added, and used to display an example map. Objects that
are higher than one tile are displayed, but widths can’t overflow
at the moment.
- Maps are saved to disk. This is still minimal, however, and loading
them from save files is not implemented at the moment.
- Some Naka::Event were added at some point, although they’re still
very much works in progress, and probably incomplete.
- Maps are displayed in a very crude way. Transitions between terrain
types are unsupported, for example.
master
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351
src/main.cr
351
src/main.cr
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@ -1,167 +1,211 @@
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require "sdl"
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require "sdl/image"
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require "json"
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## Helper code comes here
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require "./naka.cr"
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class Naka
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def self.init
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SDL.init SDL::Init::VIDEO
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SDL::IMG.init SDL::IMG::Init::PNG
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class Map
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@save_directory : String
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getter altitude_maps : Naka::Noise2D
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getter humidity_maps : Naka::Noise2D
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getter evil_maps : Naka::Noise2D
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getter flowers_map : Naka::Noise2D
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def initialize(@save_directory)
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Dir.mkdir_p @save_directory
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at_exit { SDL.quit }
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end
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end
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@altitude_maps = Naka::Noise2D.new.tap do |a|
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a.add_octave(32, 1)
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a.add_octave(16, 0.5)
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a.add_octave(8, 0.25)
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a.add_octave(4, 0.125)
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a.add_octave(2, 1/16) # wtf, too smol
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end
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class Naka::Renderer < SDL::Renderer
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end
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@humidity_maps = Naka::Noise2D.new.tap do |a|
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a.add_octave(64, 1)
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a.add_octave(32, 0.5)
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a.add_octave(16, 0.25)
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a.add_octave(8, 0.20)
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a.add_octave(4, 0.15)
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a.add_octave(2, 0.10)
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end
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class Naka::Window
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alias Flags = LibSDL::WindowFlags
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alias Position = LibSDL::WindowPosition
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@evil_maps = Naka::Noise2D.new.tap do |a|
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a.add_octave(48, 0.6)
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a.add_octave(32, 0.6)
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a.add_octave(16, 0.3)
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end
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getter renderer
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def initialize(title, width, height,
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x : Position = Position::UNDEFINED,
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y : Position = Position::UNDEFINED,
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flags : Flags = Flags::SHOWN)
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@window = SDL::Window.new(title, width, height, x, y, flags)
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@renderer = Naka::Renderer.new @window
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@flowers_map = Naka::Noise2D.new(1, 1)
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end
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def newImage(file_path) : SDL::Texture
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SDL::IMG.load file_path, @renderer
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end
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class Object
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getter type : String
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def initialize(@type)
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end
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# FIXME: We’ll probably want options for scaling, rotations, and so on.
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def draw(texture : SDL::Texture, x : Int32, y : Int32)
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@renderer.copy texture,
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dstrect: SDL::Rect[x, y, texture.width, texture.height]
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end
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end
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class Naka::Timer
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getter start
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getter last_update
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def initialize
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@start = Time.now
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@last_update = @start
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end
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def step
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now = Time.now
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dt = now.epoch_ms - @last_update.epoch_ms
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@last_update = now
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dt
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end
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end
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class Naka::Event
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class Quit
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end
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class Draw
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getter window : Naka::Window
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def initialize(@window)
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def to_json(builder)
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builder.object do
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builder.field "type", @type
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end
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end
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end
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class Update
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getter dt : Int64
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class Tile < Array(Object)
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def initialize(element)
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initialize
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def initialize(@dt)
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self << element
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end
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end
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# FIXME: Split in KeyUp and KeyDown.
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class KeyUp
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getter key : LibSDL::Keycode
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getter scan_code : LibSDL::Scancode
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CHUNK_SIZE = 32
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class Chunk
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property tiles : Array(Array(Tile))
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getter x : Int32
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getter y : Int32
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def initialize(@key, @scan_code)
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end
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end
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class KeyDown
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getter key : LibSDL::Keycode
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getter scan_code : LibSDL::Scancode
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getter repeat : Bool
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def initialize(@x, @y, map)
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p "Creating Map::Chunk"
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def initialize(@key, @scan_code, @repeat)
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end
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end
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@tiles = Array.new(CHUNK_SIZE) do |x|
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x += @x * CHUNK_SIZE
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# FIXME: THIS MAIN LOOP IS **NOT** READY FOR PRODUCTION
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# Update events are still missing, and both Draw and Update should
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# be time-based.
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# Why having a `window` parameter instead of making a Window#loop method?
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# Because we may want to have a `windows` parameter in the future, although
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# unlikely. But still possible.
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def self.loop(window, &block)
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max_fps = 60
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max_dt = 1000. / 60
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Array.new(CHUNK_SIZE) do |y|
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y += @y * CHUNK_SIZE
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timer = Naka::Timer.new
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Tile.new(Object.new "stone").tap do |i|
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altitude = map.altitude_maps.get(x, y) + 0.5
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renderer = window.renderer
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humidity = map.humidity_maps.get(x, y) + 0.5
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::loop do
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exit_requested = false
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evil = map.evil_maps.get(x, y)
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while event = SDL::Event.poll
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r_value = yield case event
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when SDL::Event::Quit
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Naka::Event::Quit.new
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when SDL::Event::Keyboard
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keysym = event.keysym
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if event.type == LibSDL::EventType::KEYUP
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Naka::Event::KeyUp.new keysym.sym, keysym.scancode
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elsif event.type == LibSDL::EventType::KEYDOWN
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Naka::Event::KeyDown.new keysym.sym, keysym.scancode, event.repeat != 0
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if altitude < 0.25
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i << Object.new "sand"
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if altitude < 0.175
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i << Object.new "water"
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else
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if humidity < 0.33
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i << Object.new "sand"
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else
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i << Object.new "dirt"
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end
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end
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elsif altitude < 0.75
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i << Object.new "dirt"
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if evil > 0.5
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i << Object.new "haunted"
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else
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i << Object.new "grass"
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end
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if altitude > 0.35 && altitude < 0.65
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if humidity > 0.4
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if humidity > 0.8
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i << Object.new "tree"
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elsif humidity < 0.6
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i << Object.new "pine"
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else
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if Random.rand(2) == 0
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i << Object.new "tree"
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else
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i << Object.new "pine"
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end
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end
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else
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if Random.rand(10) == 0
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i << Object.new "flowers"
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end
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end
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end
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elsif altitude > 0.85
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i << Object.new "rocks"
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end
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end
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else # FIXME: Most event types may need proper Naka:: classes.
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event
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end
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if r_value == Naka::Event::Quit
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exit_requested = true
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break
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end
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end
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break if exit_requested
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dt = timer.step
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r_value = yield Naka::Event::Update.new dt
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break if r_value == Naka::Event::Quit
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renderer.draw_color = SDL::Color[255, 255, 255, 255]
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renderer.clear
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yield Naka::Event::Draw.new window
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renderer.present
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sleep 0.001
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end
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def to_json
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{
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:x => @x,
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:y => @y,
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:tiles => @tiles
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}.to_json
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end
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def get(x, y)
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@tiles[x][y]
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end
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end
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@chunks = Hash(Int32, Hash(Int32, Chunk)).new
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def get_chunk(x, y)
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chunks_list = @chunks[x]?
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if chunks_list.nil?
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chunks_list = Hash(Int32, Chunk).new
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@chunks[x] = chunks_list
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end
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chunk = chunks_list[y]?
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if chunk.nil?
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chunk = Chunk.new x, y, self
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chunks_list[y] = chunk
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save chunk
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end
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chunk
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end
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def save(chunk : Chunk)
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File.write "#{@save_directory}/chunk-#{chunk.x}-#{chunk.y}.json", chunk.to_json
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end
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def get(x, y)
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get_chunk(x / CHUNK_SIZE, y / CHUNK_SIZE).get(x % CHUNK_SIZE, y % CHUNK_SIZE)
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end
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end
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## Actual application code comes here
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class ImagesLoader
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getter grass : SDL::Texture
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getter stone : SDL::Texture
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getter dirt : SDL::Texture
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getter tree : SDL::Texture
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getter pine : SDL::Texture
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getter flowers : SDL::Texture
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getter sand : SDL::Texture
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getter water : SDL::Texture
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getter haunted : SDL::Texture
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getter rocks : SDL::Texture
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def initialize(window)
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@grass = window.newImage "assets/grass.png"
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@stone = window.newImage "assets/stone.png"
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@dirt = window.newImage "assets/dirt.png"
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@tree = window.newImage "assets/tree.png"
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@flowers = window.newImage "assets/flowers.png"
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@sand = window.newImage "assets/sand.png"
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@water = window.newImage "assets/water.png"
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@haunted = window.newImage "assets/haunted.png"
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@pine = window.newImage "assets/tree_pine.png"
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@rocks = window.newImage "assets/rocks.png"
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end
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end
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Naka.init
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window = Naka::Window.new "Test", 640, 480
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window = Naka::Window.new "Test", 16*128, 16*128, flags: LibSDL::WindowFlags::RESIZABLE | LibSDL::WindowFlags::SHOWN | LibSDL::WindowFlags::OPENGL
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naka = window.newImage "naka.png"
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images = ImagesLoader.new window
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connection_font = window.newFont "Connection.otf", 30.5
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window.set_font connection_font
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map = Map.new "map-test-01"
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Naka::Event.loop window do |event|
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case event
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@ -169,7 +213,54 @@ Naka::Event.loop window do |event|
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next Naka::Event::Quit
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when Naka::Event::Update
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when Naka::Event::Draw
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event.window.draw naka, 20, 20
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zoom_level = 1.0
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128.times do |x|
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128.times do |y|
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tile = map.get x, y
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# FIXME:
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# - Please don’t draw more than one layer of ground…
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# - Transitions. (eg. between dirt and grass)
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tile.each do |object|
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image = case object.type
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when "grass"
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images.grass
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when "dirt"
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images.dirt
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when "stone"
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images.stone
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when "tree"
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images.tree
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when "pine"
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images.pine
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when "flowers"
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images.flowers
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when "water"
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images.water
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when "haunted"
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images.haunted
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when "sand"
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images.sand
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when "rocks"
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images.rocks
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else
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images.stone
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end
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window.draw(
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image,
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x: (x * 16 * zoom_level).to_i,
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y: (y * 16 * zoom_level - (image.height - 16) * zoom_level).to_i,
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scale_x: zoom_level,
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scale_y: zoom_level
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)
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end
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end
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end
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# Urgh. This shit eats CPU. Fonts need goddamn fixing.
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#window.print "The quick brown fox jumps over the lazy dog.", 50, 50
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when Naka::Event::KeyUp, Naka::Event::KeyDown
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pp! event
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end
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|
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@ -0,0 +1,203 @@
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require "sdl"
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require "sdl/image"
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require "sdl/ttf"
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class Naka
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end
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require "./noise.cr"
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## Helper code comes here
|
||||
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class Naka
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def self.init
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SDL.init SDL::Init::VIDEO
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SDL::IMG.init SDL::IMG::Init::PNG
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SDL::TTF.init
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at_exit {
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SDL.quit
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SDL::TTF.quit
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}
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end
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end
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class Naka::Renderer < SDL::Renderer
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end
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class Naka::Window
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alias Flags = LibSDL::WindowFlags
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alias Position = LibSDL::WindowPosition
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getter renderer
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@current_font : SDL::TTF::Font? = nil
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def initialize(title, width, height,
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x : Position = Position::UNDEFINED,
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y : Position = Position::UNDEFINED,
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flags : Flags = Flags::SHOWN)
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@window = SDL::Window.new(title, width, height, x, y, flags)
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@renderer = Naka::Renderer.new @window
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@renderer.draw_blend_mode = SDL::BlendMode::BLEND
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end
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|
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def newImage(file_path) : SDL::Texture
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SDL::IMG.load(file_path, @renderer).tap do |texture|
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texture.blend_mode = SDL::BlendMode::BLEND
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end
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end
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def newFont(file_path, font_size = 12) : SDL::TTF::Font
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SDL::TTF::Font.new file_path, font_size
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end
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# FIXME: We’ll probably want options for scaling, rotations, and so on.
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def draw(texture : SDL::Texture, x : Int32, y : Int32, scale_x = 1, scale_y = 1)
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@renderer.copy texture,
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dstrect: SDL::Rect[x, y, (texture.width * scale_x).to_i, (texture.height * scale_y).to_i]
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||||
end
|
||||
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def draw(surface : SDL::Surface, x : Int32, y : Int32)
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@renderer.copy surface,
|
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dstrect: SDL::Rect[x, y, surface.width, surface.height]
|
||||
end
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|
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def set_font(@current_font)
|
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end
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|
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# FIXME:
|
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# - This only prints properly “solid” text. Shaded text (depixelated)
|
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# would need some additional OpenGL manipulations.
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# - This is very inefficient resources-wise. If we are willing to drop
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# ligatures support (is it even supported in SDL::TTF?), we should
|
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# build a textures atlas of all glyphs and use that to render text.
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# - Alternatively, it may be worth it to let users generate a texture of
|
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# some text and draw it, manually.
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def print(text, x, y)
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||||
font = @current_font
|
||||
|
||||
return if font.nil?
|
||||
|
||||
surface = font.render_solid(text, SDL::Color[0, 0, 0, 255], @renderer.draw_color)
|
||||
|
||||
draw surface, x, y
|
||||
end
|
||||
end
|
||||
|
||||
class Naka::Timer
|
||||
getter start
|
||||
getter last_update
|
||||
|
||||
def initialize
|
||||
@start = Time.now
|
||||
@last_update = @start
|
||||
end
|
||||
|
||||
def step
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||||
now = Time.now
|
||||
|
||||
dt = now.epoch_ms - @last_update.epoch_ms
|
||||
|
||||
@last_update = now
|
||||
|
||||
dt
|
||||
end
|
||||
end
|
||||
|
||||
class Naka::Event
|
||||
class Quit
|
||||
end
|
||||
|
||||
class Draw
|
||||
getter window : Naka::Window
|
||||
|
||||
def initialize(@window)
|
||||
end
|
||||
end
|
||||
|
||||
class Update
|
||||
getter dt : Int64
|
||||
|
||||
def initialize(@dt)
|
||||
end
|
||||
end
|
||||
|
||||
# FIXME: Split in KeyUp and KeyDown.
|
||||
class KeyUp
|
||||
getter key : LibSDL::Keycode
|
||||
getter scan_code : LibSDL::Scancode
|
||||
|
||||
def initialize(@key, @scan_code)
|
||||
end
|
||||
end
|
||||
class KeyDown
|
||||
getter key : LibSDL::Keycode
|
||||
getter scan_code : LibSDL::Scancode
|
||||
getter repeat : Bool
|
||||
|
||||
def initialize(@key, @scan_code, @repeat)
|
||||
end
|
||||
end
|
||||
|
||||
# FIXME: THIS MAIN LOOP IS **NOT** READY FOR PRODUCTION
|
||||
# Update events are still missing, and both Draw and Update should
|
||||
# be time-based.
|
||||
# Why having a `window` parameter instead of making a Window#loop method?
|
||||
# Because we may want to have a `windows` parameter in the future, although
|
||||
# unlikely. But still possible.
|
||||
def self.loop(window, &block)
|
||||
max_fps = 60
|
||||
max_dt = 1000. / 60
|
||||
|
||||
timer = Naka::Timer.new
|
||||
|
||||
renderer = window.renderer
|
||||
|
||||
::loop do
|
||||
exit_requested = false
|
||||
|
||||
while event = SDL::Event.poll
|
||||
r_value = yield case event
|
||||
when SDL::Event::Quit
|
||||
Naka::Event::Quit.new
|
||||
when SDL::Event::Keyboard
|
||||
keysym = event.keysym
|
||||
if event.type == LibSDL::EventType::KEYUP
|
||||
Naka::Event::KeyUp.new keysym.sym, keysym.scancode
|
||||
elsif event.type == LibSDL::EventType::KEYDOWN
|
||||
Naka::Event::KeyDown.new keysym.sym, keysym.scancode, event.repeat != 0
|
||||
end
|
||||
else # FIXME: Most event types may need proper Naka:: classes.
|
||||
event
|
||||
end
|
||||
|
||||
if r_value == Naka::Event::Quit
|
||||
exit_requested = true
|
||||
break
|
||||
end
|
||||
end
|
||||
|
||||
break if exit_requested
|
||||
|
||||
dt = timer.step
|
||||
|
||||
r_value = yield Naka::Event::Update.new dt
|
||||
|
||||
break if r_value == Naka::Event::Quit
|
||||
|
||||
renderer.draw_color = SDL::Color[255, 255, 255, 255]
|
||||
renderer.clear
|
||||
|
||||
yield Naka::Event::Draw.new window
|
||||
|
||||
renderer.present
|
||||
|
||||
sleep 0.001
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
|
|
@ -0,0 +1,105 @@
|
|||
|
||||
# FIXME: We may want to generate noise of other numbers of dimensions.
|
||||
class Naka::Noise2D
|
||||
class Octave
|
||||
record Vec2, x : Float64, y : Float64
|
||||
|
||||
private def lerp(a, b, v)
|
||||
a * (1.0 - v) + b * v
|
||||
end
|
||||
|
||||
private def smooth(v)
|
||||
v * v * (3.0 - 2.0 * v)
|
||||
end
|
||||
|
||||
private def gradient(orig, grad, p)
|
||||
sp = Vec2.new(p.x - orig.x, p.y - orig.y)
|
||||
grad.x * sp.x + grad.y * sp.y
|
||||
end
|
||||
|
||||
private def random_gradient
|
||||
v = rand * Math::PI * 2.0
|
||||
Vec2.new(Math.cos(v), Math.sin(v))
|
||||
end
|
||||
|
||||
@frequency : Float64 | Int32
|
||||
@amplitude : Float64 | Int32
|
||||
|
||||
def amplitude
|
||||
@amplitude.to_f
|
||||
end
|
||||
def frequency
|
||||
@frequency.to_f
|
||||
end
|
||||
|
||||
def initialize(@frequency, @amplitude)
|
||||
@rgradients = StaticArray(Vec2, 256).new { random_gradient }
|
||||
@permutations = StaticArray(Int32, 256).new { |i| i }
|
||||
@permutations.shuffle!
|
||||
end
|
||||
|
||||
def get_gradient(x, y)
|
||||
idx = @permutations[x & 255] + @permutations[y & 255]
|
||||
@rgradients[idx & 255]
|
||||
end
|
||||
|
||||
def get_gradients(x, y)
|
||||
x0f = x.floor
|
||||
y0f = y.floor
|
||||
x0 = x0f.to_i
|
||||
y0 = y0f.to_i
|
||||
x1 = x0 + 1
|
||||
y1 = y0 + 1
|
||||
|
||||
{
|
||||
{
|
||||
get_gradient(x0, y0),
|
||||
get_gradient(x1, y0),
|
||||
get_gradient(x0, y1),
|
||||
get_gradient(x1, y1),
|
||||
},
|
||||
{
|
||||
Vec2.new(x0f + 0.0, y0f + 0.0),
|
||||
Vec2.new(x0f + 1.0, y0f + 0.0),
|
||||
Vec2.new(x0f + 0.0, y0f + 1.0),
|
||||
Vec2.new(x0f + 1.0, y0f + 1.0),
|
||||
},
|
||||
}
|
||||
end
|
||||
|
||||
def get(x, y)
|
||||
x = x.to_f / @frequency
|
||||
y = y.to_f / @frequency
|
||||
|
||||
p = Vec2.new(x, y)
|
||||
gradients, origins = get_gradients(x, y)
|
||||
v0 = gradient(origins[0], gradients[0], p)
|
||||
v1 = gradient(origins[1], gradients[1], p)
|
||||
v2 = gradient(origins[2], gradients[2], p)
|
||||
v3 = gradient(origins[3], gradients[3], p)
|
||||
fx = smooth(x - origins[0].x)
|
||||
vx0 = lerp(v0, v1, fx)
|
||||
vx1 = lerp(v2, v3, fx)
|
||||
fy = smooth(y - origins[0].y)
|
||||
|
||||
lerp(vx0, vx1, fy) * @amplitude.to_f
|
||||
end
|
||||
end
|
||||
|
||||
|
||||
@storage = Array(Octave).new
|
||||
def initialize
|
||||
end
|
||||
def initialize(a, f)
|
||||
add_octave a, f
|
||||
end
|
||||
|
||||
def add_octave(a, f)
|
||||
@storage << Octave.new a, f
|
||||
end
|
||||
|
||||
def get(x, y)
|
||||
@storage.reduce 0 { |a, e| a + e.get(x, y) }
|
||||
end
|
||||
end
|
||||
|
||||
Loading…
Reference in New Issue