123 lines
2.7 KiB
Ruby
123 lines
2.7 KiB
Ruby
require_relative 'state'
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require_relative 'maze'
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require_relative 'character'
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require 'perlin'
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class Game < Scene
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def initialize
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super
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@font = Gosu::Font.new(24)
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@noise = Perlin::Generator.new(rand(1000), 1.0, 1)
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@floor_image = Gosu::Image.new("assets/images/floor.png", retro: true)
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@maze = Maze.new
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@character = Character.new
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@camera = [0, 0]
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$bus.on(:player_move) do |pos|
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@camera = pos
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end
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$bus.on_retrievable(:collides?) do |rect|
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collisions = []
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collisions << :wall if @maze.collides?(rect)
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collisions << :character if @character.collides?(rect)
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next collisions
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end
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end
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def draw
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draw_floor
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@maze.draw(@camera)
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@character.draw
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draw_fog(@camera)
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draw_debug! if DEBUG
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end
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def draw_debug!
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now = Gosu.milliseconds
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@last_draw_time ||= now
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@draw_count ||= 0
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@fps ||= 0
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@draw_count += 1
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if now - @last_draw_time >= 1000
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@fps = @draw_count
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@draw_count = 0
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@last_draw_time = now
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end
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@font.draw_text("FPS: #{@fps}", 5, 5, Float::INFINITY, 1, 1, Gosu::Color::YELLOW)
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end
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def draw_fog(camera)
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cam_x, cam_y = camera
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cell = 10
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i_radius = 80.0
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o_radius = 360.0
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# Player screen position
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px = SCREEN_SIZE[0] / 2.0
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py = SCREEN_SIZE[1] / 2.0
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tiles_x = (SCREEN_SIZE[0] / cell) + 2
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tiles_y = (SCREEN_SIZE[1] / cell) + 2
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tiles_y.times do |j|
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tiles_x.times do |i|
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sx = i * cell
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sy = j * cell
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dist = Math.sqrt((sx - px)**2 + (sy - py)**2)
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if dist < i_radius
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next # fully clear
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elsif dist > o_radius
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alpha = 255
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else
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t = (dist - i_radius) / (o_radius - i_radius) # 0..1
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world_x = (sx + cam_x) * 0.005
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world_y = (sy + cam_y) * 0.005
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# Sample noise at world position so it scrolls with camera
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noise = (@noise[world_x + Gosu.milliseconds / 5000.0, world_y + Gosu.milliseconds / 6000.0] + 1.0) / 2.0
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alpha = (t * (1.0 + noise) * 255).to_i.clamp(0, 255)
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end
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Gosu.draw_rect(sx, sy, cell, cell, Gosu::Color.new(alpha, 0, 0, 0), 10000 + sy)
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end
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end
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end
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def draw_floor
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cam_x, cam_y = @camera
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tile_size = 60
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offset_x = cam_x % tile_size
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offset_y = cam_y % tile_size
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tiles_x = (SCREEN_SIZE[0] / tile_size) + 2
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tiles_y = (SCREEN_SIZE[1] / tile_size) + 2
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(0...tiles_y).each do |j|
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(0...tiles_x).each do |i|
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sx = i * tile_size - offset_x
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sy = j * tile_size - offset_y
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@floor_image.draw(sx, sy, -1000, 3, 3)
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end
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end
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end
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def update
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@character.update
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end
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def button_down(id, _pos)
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return $bus.emit(:change_scene, Menu.new) if id == Gosu::KB_ESCAPE
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end
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end |