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flapper.rb
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flapper.rb
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require 'raylib'
include Raylib
####################################################################################################
class Game
attr_reader :high_score, :config, :current_score, :state_timer
STATES = [:Ready, :Playing, :GameOver]
StageConfig = Struct.new(:screen_width, :screen_height, keyword_init: true)
STATE_READY_DURATION = 0.25
STATE_GAMEOVER_DURATION = 1.0
def initialize
@config = StageConfig.new(screen_width: 480, screen_height: 720)
@high_score = 0
reset
end
def reset(keep_high_score: true)
@state = :Ready
@current_score = 0
@high_score = 0 unless :keep_high_score
@state_timer = 0.0
end
def update(dt)
@state_timer += dt
case @state
when :Ready
if @state_timer > STATE_READY_DURATION && (IsKeyDown(KEY_SPACE) || IsMouseButtonDown(MOUSE_BUTTON_LEFT))
@state_timer = 0.0
@state = :Playing
end
end
end
def set_state(new_state)
raise ArgumentError unless STATES.include? new_state
@state = new_state
@state_timer = 0.0
end
private :set_state
def finish = set_state(:GameOver)
def ready? = @state == :Ready
def game_over? = @state == :GameOver
def current_score=(new_score)
@current_score = new_score
@high_score = @current_score if @current_score > @high_score
end
end
####################################################################################################
class Dot
attr_accessor :pos
attr_reader :radius, :large
SCORE_NORMAL = 10
SCORE_LARGE = 50
FONT_SIZE_NORMAL = 12
FONT_SIZE_LARGE = 14
RADIUS_NORMAL = 8.0
RADIUS_LARGE = 24.0
def initialize(pos_x, pos_y, large_on:)
@pos = Vector2.create(pos_x, pos_y)
@size = Vector2.create
reset(large_on:)
end
def reset(large_on: false)
@large = large_on
@radius = large_on ? RADIUS_LARGE : RADIUS_NORMAL
@size.set(@radius, @radius)
@active = true
end
def hit?(offset, circle_center, circle_radius)
hit = CheckCollisionCircles(Vector2.create(@pos.x + offset, @pos.y), @radius, circle_center, circle_radius)
return hit, hit ? score() : 0
end
def eaten? = !@active
def hide = @active = false
def score = @large ? SCORE_LARGE : SCORE_NORMAL
def render(offset_x)
if @large
DrawCircle(offset_x + @pos.x + @radius * 0.5 - RADIUS_NORMAL, @pos.y - @radius * 0.25 + RADIUS_NORMAL, @radius, ORANGE)
else
DrawRectangle(offset_x + @pos.x, @pos.y, @size.x, @size.y, ORANGE)
end
end
def render_score(offset_x)
if @large
DrawText(SCORE_LARGE.to_s, offset_x + @pos.x, @pos.y, FONT_SIZE_LARGE, RED)
else
DrawText(SCORE_NORMAL.to_s, offset_x + @pos.x, @pos.y, FONT_SIZE_NORMAL, RED)
end
end
end
####################################################################################################
class Obstacle
attr_reader :width, :top, :bottom, :pos_x
def initialize(width, top, bottom, stage_height, pos_x)
stage_height = 0.0 if stage_height < 0.0
top = 0.0 if top < 0.0
bottom = stage_height if bottom > stage_height
bottom = top if bottom < top
@width = width
@top = top
@bottom = bottom
@stage_height = stage_height
@pos_x = pos_x
end
def gap_center_y = (@top + @bottom) * 0.5
def hit?(offset, circle_center, circle_radius)
check_height = 1000000.0
rect_top = Rectangle.create(offset + 0.0, -check_height, @width, check_height + @top)
return true if CheckCollisionCircleRec(circle_center, circle_radius, rect_top)
rect_bottom = Rectangle.create(offset + 0.0, @bottom, @width, @stage_height - @bottom)
return true if CheckCollisionCircleRec(circle_center, circle_radius, rect_bottom)
return false
end
def render(offset)
DrawRectangle(offset + @pos_x + 0.0, 0.0, @width, @top, BLUE)
DrawRectangle(offset + @pos_x + 2.0, 0.0, @width - 2.0 * 2.0, @top - 2.0, BLACK)
DrawRectangleLinesEx(Rectangle.create(offset + @pos_x + 6.0, -2.0, @width - 2.0 * 6.0, @top - 4.0), 2.0, BLUE)
DrawRectangle(offset + @pos_x + 0.0, @bottom, @width, @stage_height - @bottom + 1.0, BLUE)
DrawRectangle(offset + @pos_x + 2.0, @bottom + 2.0, @width - 2.0 * 2.0, @stage_height - @bottom, BLACK)
DrawRectangleLinesEx(Rectangle.create(offset + @pos_x + 6.0, @bottom + 6.0, @width - 2.0 * 6.0, @stage_height - @bottom - 8.0), 2.0, BLUE)
end
end
class Area
attr_reader :stage_width
SCORE_BONUS = 200
FONT_SIZE_BONUS = 18
def initialize(stage_width, stage_height, ground_height, obstacle_width, obstacle_interval, gap_height)
@stage_width = stage_width
@stage_height = stage_height
@ground_height = ground_height
@obstacle_width = obstacle_width
@obstacle_interval = obstacle_interval
@gap_height = gap_height
@obstacles = []
@dots = []
@eaten_all_dots = false
end
def clear
@obstacles.clear
@dots.clear
end
def make_obstacles
obstacle_min_height = 5.0
top_min = obstacle_min_height
top_max = @stage_height - @ground_height - @gap_height - obstacle_min_height
obstacles_conut = (@stage_width / (@obstacle_width + @obstacle_interval)).to_i
current_pos_x = 0.0
obstacles_conut.times do |i|
top = (rand() * (@stage_height - @gap_height)).clamp(top_min, top_max)
bottom = top + @gap_height
@obstacles << Obstacle.new(@obstacle_width, top, bottom, @stage_height - @ground_height, current_pos_x)
current_pos_x += (@obstacle_width + @obstacle_interval)
end
end
private :make_obstacles
def make_dots
@obstacles.each do |obstacle|
@dots << Dot.new(obstacle.pos_x + obstacle.width * 0.5, obstacle.gap_center_y, large_on: true)
end
obstacles_conut = (@stage_width / (@obstacle_width + @obstacle_interval)).to_i
current_pos_x = @obstacle_width + @obstacle_interval * 1.0
current_pos_y = Dot::RADIUS_LARGE + Dot::RADIUS_NORMAL
@dots << Dot.new(current_pos_x, current_pos_y, large_on: true)
y_interval = Dot::RADIUS_NORMAL * 4.0
current_pos_y += Dot::RADIUS_LARGE + y_interval
16.times do |i|
@dots << Dot.new(current_pos_x, current_pos_y, large_on: false)
current_pos_y += y_interval
end
current_pos_y += Dot::RADIUS_LARGE
@dots << Dot.new(current_pos_x, current_pos_y, large_on: true)
end
private :make_dots
def eaten_dots_count
@dots.count {|dot| dot.eaten? }
end
private :eaten_dots_count
def left_dots_count
@dots.length - eaten_dots_count()
end
private :eaten_dots_count
def make
@obstacles.clear
make_obstacles()
@dots.clear
make_dots()
end
def hit?(offset, circle_center, circle_radius)
score_total = 0
left_dots_count_before = left_dots_count()
@dots.each do |dot|
unless dot.eaten?
hit, score = dot.hit?(offset, circle_center, circle_radius)
if hit
score_total += score
dot.hide
end
end
end
left_dots_count_after = left_dots_count()
if left_dots_count_before > 0 && left_dots_count_after == 0
@eaten_all_dots = true
score_total += SCORE_BONUS
end
@obstacles.each do |obstacle|
hit = obstacle.hit?(offset, circle_center, circle_radius)
return hit, score_total if hit
end
return false, score_total
end
def render(offset)
@obstacles.each do |obstacle|
obstacle.render(offset)
end
@dots.each do |dot|
unless dot.eaten?
dot.render(offset)
else
dot.render_score(offset)
end
end
if @eaten_all_dots && !@dots.empty?
DrawText('Perfect!', offset + @dots.last.pos.x + 30.0, @stage_height * 0.5, FONT_SIZE_BONUS, RED)
DrawText(SCORE_BONUS.to_s, offset + @dots.last.pos.x + 30.0, @stage_height * 0.5 + FONT_SIZE_BONUS, FONT_SIZE_BONUS, RED)
end
end
end
####################################################################################################
class Stage
attr_reader :width, :height, :center
BACKGROUND_COLOR_0 = Color.from_u8(10, 20, 120, 255)
BACKGROUND_COLOR_1 = Color.from_u8(235, 250, 220, 255)
BORDER_COLOR = Color.from_u8(80, 60, 170, 255)
LAWN_COLOR_0 = Color.from_u8(50, 90, 230, 255)
LAWN_COLOR_1 = Color.from_u8(10, 50, 200, 255)
DIRT_COLOR = Color.from_u8(215, 215, 215, 255)
BUILDING_COLOR_00 = Color.from_u8(200, 225, 225, 255)
BUILDING_COLOR_10 = Color.from_u8(160, 170, 210, 255)
BUILDING_COLOR_11 = Color.from_u8(180, 190, 230, 255)
def initialize(width, height)
@width = width
@height = height
@center = Vector2.create(@width * 0.5, @height * 0.5)
@building_scroll_speed = 1.0
@building_pattern_offset = 0.0
@building_pattern_width = 130
@ground_height = 60.0
@lawn_height = 20.0
@border_height = 2.0
@lawn_scroll_speed = 2.0
@lawn_pattern_offset = 0.0
@lawn_pattern_width = @lawn_height
@areas_scroll_speed = 2.0
@areas_pattern_offset = 0.0
@areas_pattern_width = @width
@obstacle_width = 150.0
@obstacle_interval = 150.0
@gap_height = 300.0
@areas = [
Area.new(@width, @height, @ground_height, @obstacle_width, @obstacle_interval, @gap_height),
Area.new(@width, @height, @ground_height, @obstacle_width, @obstacle_interval, @gap_height),
]
@building_pattern = lambda {|offset_x|
# Layer0
DrawRectangle(offset_x + 5.0, 560.0, 25.0, @height, BUILDING_COLOR_00)
DrawRectangle(offset_x + 35.0, 580.0, 25.0, @height, BUILDING_COLOR_00)
DrawRectangle(offset_x + 85.0, 600.0, 25.0, @height, BUILDING_COLOR_00)
DrawRectangle(offset_x + 115.0, 590.0, 25.0, @height, BUILDING_COLOR_00)
# Layer1-1
DrawRectangle(offset_x + 20.0, 600.0, 20.0, @height, BUILDING_COLOR_10)
DrawRectangle(offset_x + 20.0 + 2.0, 600.0 + 2.0, 20.0 - 2.0 * 2.0, @height, BUILDING_COLOR_11)
DrawRectangle(offset_x + 65.0, 570.0, 30.0, @height, BUILDING_COLOR_10)
DrawRectangle(offset_x + 65.0 + 2.0, 570.0 + 2.0, 30.0 - 2.0 * 2.0, @height, BUILDING_COLOR_11)
# Layer1-2
DrawRectangle(offset_x + 50.0, 550.0, 30.0, @height, BUILDING_COLOR_10)
DrawRectangle(offset_x + 50.0 + 2.0, 550.0 + 2.0, 30.0 - 2.0 * 2.0, @height, BUILDING_COLOR_11)
DrawRectangle(offset_x + 100.0, 580.0, 30.0, @height, BUILDING_COLOR_10)
DrawRectangle(offset_x + 100.0 + 2.0, 580.0 + 2.0, 30.0 - 2.0 * 2.0, @height, BUILDING_COLOR_11)
# Layer1-3
DrawRectangle(offset_x + 35.0, 620.0, 20.0, @height, BUILDING_COLOR_10)
DrawRectangle(offset_x + 35.0 + 2.0, 620.0 + 2.0, 20.0 - 2.0 * 2.0, @height, BUILDING_COLOR_11)
DrawRectangle(offset_x + 75.0, 610.0, 30.0, @height, BUILDING_COLOR_10)
DrawRectangle(offset_x + 75.0 + 2.0, 610.0 + 2.0, 30.0 - 2.0 * 2.0, @height, BUILDING_COLOR_11)
}
@lawn_pattern = lambda {|offset_x, base_y|
len = @lawn_pattern_width
repeat = 1 + (@width / (2 * len)).to_i
repeat.times do |i|
DrawRectangle(offset_x + i * len * 2, base_y, len, len, LAWN_COLOR_1)
end
}
reset()
end
def reset
@building_pattern_offset = 0.0
@lawn_pattern_offset = 0.0
@areas_pattern_offset = 0.0
@areas[0].clear
@areas[1].make
end
def update(dt)
@building_pattern_offset -= @building_scroll_speed
@building_pattern_offset = 0.0 if @building_pattern_offset.abs >= @building_pattern_width
@lawn_pattern_offset -= @lawn_scroll_speed
@lawn_pattern_offset = 0.0 if @lawn_pattern_offset.abs >= (2 * @lawn_pattern_width)
@areas_pattern_offset -= @areas_scroll_speed
if @areas_pattern_offset.abs >= @areas_pattern_width
@areas_pattern_offset = 0.0
@areas[0] = @areas[1]
@areas[1] = Area.new(@width, @height, @ground_height, @obstacle_width, @obstacle_interval, @gap_height)
@areas[1].make
end
end
def ground_hit?(circle_center, circle_radius)
base_y = @height - @ground_height
rect_ground = Rectangle.create(0.0, base_y, @width, @ground_height)
if CheckCollisionCircleRec(circle_center, circle_radius, rect_ground)
return true
end
return false
end
private :ground_hit?
def hit?(circle_center, circle_radius)
hit_any = false
score_total = 0
@areas.length.times do |i|
offset = @areas_pattern_offset + i * @areas[i].stage_width
hit, score = @areas[i].hit?(offset, circle_center, circle_radius)
hit_any = true if hit
score_total += score
end
unless hit_any
hit_any = ground_hit?(circle_center, circle_radius)
end
return hit_any, score_total
end
def render
# Sky
DrawRectangleGradientV(0.0, 0.0, @width, @height, BACKGROUND_COLOR_0, BACKGROUND_COLOR_1)
# Background
5.times do |i|
@building_pattern.call(@building_pattern_offset + i * @building_pattern_width)
end
# Ground
base_y = @height - @ground_height
DrawRectangle(0.0, base_y, @width, @ground_height, DIRT_COLOR)
DrawRectangle(0.0, base_y, @width, @border_height, BORDER_COLOR)
DrawRectangle(0.0, base_y + @border_height, @width, @lawn_height, LAWN_COLOR_0)
@lawn_pattern.call(@lawn_pattern_offset, base_y + @border_height)
@areas.length.times do |i|
offset = @areas_pattern_offset + i * @areas[i].stage_width
@areas[i].render(offset)
end
end
end
####################################################################################################
class Player
attr_reader :hit_radius
attr_accessor :pos
STATES = [:Alive, :Failed]
DRAW_RADIUS = 50.0
HIT_RADIUS = 40.0
GRAVITY = 9.8 * 6
VEL_BOOST = 9.8 * 1.5
ANGLE_OFFSET_LIMIT = 45.0
def initialize
@pos = Vector2.create
reset
end
def reset
@pos.set(0.0, 0.0)
@draw_radius = DRAW_RADIUS
@hit_radius = HIT_RADIUS
@anim_mouse_timer = 0.0
@anim_mouse_open = true
@anim_failed_timer = 0.0
@anim_failed_scale = 1.0
@state = :Alive
@vel_y = 0
@angle_offset = 0
end
def set_state(new_state)
raise ArgumentError unless STATES.include? new_state
@state = new_state
end
private :set_state
def finish = set_state(:Failed)
def failed? = @state == :Failed
def update(dt)
if not failed? and (IsKeyPressed(KEY_SPACE) || IsMouseButtonPressed(MOUSE_BUTTON_LEFT))
@vel_y = -VEL_BOOST
end
if @state == :Alive
@vel_y = @vel_y + GRAVITY * dt
@pos.y = @pos.y + @vel_y
end
angle_rot_rate = @vel_y.clamp(-VEL_BOOST, VEL_BOOST) / VEL_BOOST
@angle_offset = ANGLE_OFFSET_LIMIT * angle_rot_rate
case @state
when :Alive
@anim_mouse_open = @anim_mouse_timer <= ((1.0 / 60.0) * 4)
@anim_mouse_timer += dt
@anim_mouse_timer = 0.0 if @anim_mouse_timer >= ((1.0 / 60.0) * 8)
when :Failed
@anim_failed_scale = 1.0 - @anim_failed_timer
@anim_failed_scale = 0.0 if @anim_failed_scale < 0.0
@anim_failed_timer += dt
end
end
def render
radius = @draw_radius
radius *= @anim_failed_scale if failed?
body_color = failed? ? Fade(YELLOW, @anim_failed_scale) : YELLOW
if @anim_mouse_open
DrawCircleSector(@pos, radius, 30 + @angle_offset, 330 + @angle_offset, 36, body_color)
else
DrawCircle(@pos.x, @pos.y, radius, body_color)
end
end
end
####################################################################################################
if __FILE__ == $PROGRAM_NAME
# Load raylib
shared_lib_path = Gem::Specification.find_by_name('raylib-bindings').full_gem_path + '/lib/'
case RUBY_PLATFORM
when /mswin|msys|mingw/ # Windows
Raylib.load_lib(shared_lib_path + 'libraylib.dll')
when /darwin/ # macOS
arch = RUBY_PLATFORM.split('-')[0]
Raylib.load_lib(shared_lib_path + "libraylib.#{arch}.dylib")
when /linux/ # Ubuntu Linux (x86_64 or aarch64)
arch = RUBY_PLATFORM.split('-')[0]
Raylib.load_lib(shared_lib_path + "libraylib.#{arch}.so")
else
raise RuntimeError, "Unknown system: #{RUBY_PLATFORM}"
end
game = Game.new
screen_width, screen_height = game.config.screen_width, game.config.screen_height
# Start raylib
SetTraceLogLevel(LOG_ERROR)
InitWindow(screen_width, screen_height, 'Yet Another Ruby-raylib bindings : flapper')
SetTargetFPS(60)
# Initialize objects
stage = Stage.new(screen_width, screen_height)
player = Player.new
reset_game = lambda {
game.reset
stage.reset
player.reset
player.pos.set(stage.center.x, screen_height * 0.5)
}
reset_game.call
until WindowShouldClose()
# Press R (or Space/Click when game is finished) to restart
reset_requested = IsKeyPressed(KEY_R) || (game.game_over? && (game.state_timer > Game::STATE_GAMEOVER_DURATION) && (IsKeyPressed(KEY_SPACE) || IsMouseButtonPressed(MOUSE_BUTTON_LEFT)))
reset_game.call if reset_requested
dt = GetFrameTime()
# Update objects
game.update(dt)
unless game.ready?
player.update(dt)
unless game.game_over?
stage.update(dt)
# Check collision : player vs stage
hit, score = stage.hit?(player.pos, player.hit_radius)
if hit
game.finish
player.finish
end
game.current_score += score
end
end
# Render scene
BeginDrawing()
ClearBackground(Stage::BACKGROUND_COLOR_0)
# Render objects
stage.render
player.render
# Render UI
# Event message
msg_font_size = 35
if game.ready?
text_widths = [
MeasureText('READY?', msg_font_size),
MeasureText('Space/Click to start', msg_font_size)
]
q = game.state_timer.divmod(0.1)[0]
DrawText('READY?', 0.5 * screen_width - text_widths[0] * 0.5, 70, msg_font_size, RED) if q % 2 == 0
DrawText('Space/Click to start', 0.5 * screen_width - text_widths[1] * 0.5, 130, msg_font_size, RED) if q % 2 == 0
elsif game.game_over?
text_widths = [
MeasureText('GAME OVER', msg_font_size),
MeasureText('Space/Click to restart', msg_font_size)
]
DrawText('GAME OVER', 0.5 * screen_width - text_widths[0] * 0.5, 0.5 * screen_height - 30, msg_font_size, RED)
DrawText('Space/Click to restart', 0.5 * screen_width - text_widths[1] * 0.5, 0.5 * screen_height + 30, msg_font_size, RED) if game.state_timer > Game::STATE_GAMEOVER_DURATION
end
# Scores
DrawText('1UP', 20, 10, 25, RED)
DrawText("#{game.current_score}", 20, 35, 25, WHITE)
score_font_size = 25
hiscore_header = 'HIGH SCORE'
hiscore_header_width = MeasureText(hiscore_header, score_font_size)
hiscore_value = "%10d" % game.high_score
hiscore_value_width = MeasureText(hiscore_value, score_font_size)
hiscore_value_offset = (hiscore_header_width - hiscore_value_width).abs
hiscore_header_x = 0.5 * screen_width - hiscore_header_width * 0.5
hiscore_value_x = hiscore_header_x + hiscore_value_offset
DrawText(hiscore_header, hiscore_header_x, 10, score_font_size, RED)
DrawText(hiscore_value, hiscore_value_x, 35, score_font_size, WHITE)
# Help message
if game.ready?
help_base_x = screen_width - 220
help_base_y = screen_height - 100
help_msg_x = help_base_x + 10
help_msg_base_y = help_base_y + 10
DrawRectangle(help_base_x, help_base_y, 205, 80, Fade(MAROON, 0.8))
DrawRectangleLines(help_base_x, help_base_y, 205, 80, GRAY)
DrawText('Space/Click : jump', help_msg_x, help_msg_base_y + 0, 20, WHITE)
DrawText('R : restart game', help_msg_x, help_msg_base_y + 20, 20, WHITE)
DrawText('ESC : exit', help_msg_x, help_msg_base_y + 40, 20, WHITE)
end
EndDrawing()
end
CloseWindow()
end