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def new_star args
{ x: 1280.randomize(:ratio),
starting_y: 800,
distance_to_travel: 900 + 100.randomize(:ratio),
duration: 100.randomize(:ratio) + 60,
created_at: args.state.tick_count,
max_alpha: 128.randomize(:ratio) + 128,
b: 255.randomize(:ratio),
g: 200.randomize(:ratio),
w: 1.randomize(:ratio) + 1,
h: 1.randomize(:ratio) + 1 }
end
def new_enemy args
{ x: 1280.randomize(:ratio),
starting_y: 800,
distance_to_travel: -900,
duration: 60.randomize(:ratio) + 180,
created_at: args.state.tick_count,
w: 32,
h: 32,
fire_rate: (30.randomize(:ratio) + (60 - args.state.score)).to_i }
end
def new_bullet args, starting_x, starting_y, enemy_speed
{ x: starting_x,
starting_y: starting_y,
distance_to_travel: -900,
created_at: args.state.tick_count,
duration: 900 / (enemy_speed.abs + 2.0 + (5.0 * args.state.score.fdiv(100))).abs,
w: 5,
h: 5 }
end
def new_player_bullet args, starting_x, starting_y, player_speed
{ x: starting_x,
starting_y: starting_y,
distance_to_travel: 900,
created_at: args.state.tick_count,
duration: 900 / (player_speed + 2.0),
w: 5,
h: 5 }
end
def defaults args
args.outputs.background_color = [0, 0, 0]
args.state.score ||= 0
args.state.stars ||= []
args.state.enemies ||= []
args.state.bullets ||= []
args.state.player_bullets ||= []
args.state.max_stars = 50
args.state.max_enemies = 10
args.state.player.x ||= 640
args.state.player.y ||= 100
args.state.player.w ||= 32
args.state.player.h ||= 32
if args.state.tick_count == 0
args.state.stars.clear
args.state.max_stars.times do
s = new_star args
s[:created_at] += s[:duration].randomize(:ratio)
args.state.stars << s
end
end
if args.state.tick_count == 0
args.state.enemies.clear
args.state.max_enemies.times do
s = new_enemy args
s[:created_at] += s[:duration].randomize(:ratio)
args.state.enemies << s
end
end
end
def input args
if args.inputs.keyboard.left
args.state.player.x -= 5
elsif args.inputs.keyboard.right
args.state.player.x += 5
end
if args.inputs.keyboard.up
args.state.player.y += 5
elsif args.inputs.keyboard.down
args.state.player.y -= 5
end
if args.inputs.keyboard.key_down.space
args.state.player_bullets << new_player_bullet(args,
args.state.player.x + args.state.player.w.half,
args.state.player.y + args.state.player.h, 5)
end
args.state.player.y = args.state.player.y.greater(0).lesser(720 - args.state.player.w)
args.state.player.x = args.state.player.x.greater(0).lesser(1280 - args.state.player.h)
end
def completed? entity
(entity[:created_at] + entity[:duration]).elapsed_time > 0
end
def calc_stars args
if (stars_to_add = args.state.max_stars - args.state.stars.length) > 0
stars_to_add.times { args.state.stars << new_star(args) }
end
args.state.stars = args.state.stars.reject { |s| completed? s }
end
def move_enemies args
if (enemies_to_add = args.state.max_enemies - args.state.enemies.length) > 0
enemies_to_add.times { args.state.enemies << new_enemy(args) }
end
args.state.enemies = args.state.enemies.reject { |s| completed? s }
end
def move_bullets args
args.state.enemies.each do |e|
if args.state.tick_count.mod_zero?(e[:fire_rate])
args.state.bullets << new_bullet(args, e[:x] + e[:w].half, current_y(e), e[:distance_to_travel] / e[:duration])
end
end
args.state.bullets = args.state.bullets.reject { |s| completed? s }
args.state.player_bullets = args.state.player_bullets.reject { |s| completed? s }
end
def intersect? entity_one, entity_two
entity_one.merge(y: current_y(entity_one))
.intersect_rect? entity_two.merge(y: current_y(entity_two))
end
def kill args
bullets_hitting_enemies = []
dead_bullets = []
dead_enemies = []
args.state.player_bullets.each do |b|
args.state.enemies.each do |e|
if intersect? b, e
dead_bullets << b
dead_enemies << e
end
end
end
args.state.score += dead_enemies.length
args.state.player_bullets.reject! { |b| dead_bullets.include? b }
args.state.enemies.reject! { |e| dead_enemies.include? e }
dead = args.state.bullets.any? do |b|
[args.state.player.x,
args.state.player.y,
args.state.player.w,
args.state.player.h].intersect_rect? b.merge(y: current_y(b))
end
return unless dead
args.gtk.reset
defaults args
end
def calc args
calc_stars args
move_enemies args
move_bullets args
kill args
end
def current_y entity
entity[:starting_y] + (entity[:distance_to_travel] * entity[:created_at].ease(entity[:duration], :identity))
end
def render args
args.outputs.solids << args.state.stars.map do |s|
[s[:x],
current_y(s),
s[:w], s[:h], 0, s[:g], s[:b], s[:max_alpha] * s[:created_at].ease(20, :identity)]
end
args.outputs.borders << args.state.enemies.map do |s|
[s[:x],
current_y(s),
s[:w], s[:h], 255, 0, 0]
end
args.outputs.borders << args.state.bullets.map do |b|
[b[:x],
current_y(b),
b[:w], b[:h], 255, 0, 0]
end
args.outputs.borders << args.state.player_bullets.map do |b|
[b[:x],
current_y(b),
b[:w], b[:h], 255, 255, 255]
end
args.borders << [args.state.player.x,
args.state.player.y,
args.state.player.w,
args.state.player.h, 255, 255, 255]
end
def tick args
defaults args
input args
calc args
render args
end
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