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# full documenation is at http://docs.dragonruby.org
# be sure to come to the discord if you hit any snags: http://discord.dragonruby.org
def tick args
# ====================================================
# initialize default variables
# ====================================================
# ruby has an operator called ||= which means "only initialize this if it's nil"
args.state.count_down ||= 20 * 60 # set the count down to 20 seconds
# set the initial position of the target
args.state.target ||= { x: args.grid.w.half,
y: args.grid.h.half,
w: 20,
h: 20 }
# set the initial position of the player
args.state.player ||= { x: 50,
y: 50,
w: 20,
h: 20 }
# set the player movement speed
args.state.player_speed ||= 5
# set the score
args.state.score ||= 0
args.state.teleports ||= 3
# set the instructions
args.state.instructions ||= "Get to the red goal! Use arrow keys to move. Spacebar to teleport (use them carefully)!"
# ====================================================
# render the game
# ====================================================
args.outputs.labels << { x: args.grid.w.half, y: args.grid.h - 10,
text: args.state.instructions,
alignment_enum: 1 }
# check if it's game over. if so, then render game over
# otherwise render the current time left
if game_over? args
args.outputs.labels << { x: args.grid.w.half,
y: args.grid.h - 40,
text: "game over! (press r to start over)",
alignment_enum: 1 }
else
args.outputs.labels << { x: args.grid.w.half,
y: args.grid.h - 40,
text: "time left: #{(args.state.count_down.idiv 60) + 1}",
alignment_enum: 1 }
end
# render the score
args.outputs.labels << { x: args.grid.w.half,
y: args.grid.h - 70,
text: "score: #{args.state.score}",
alignment_enum: 1 }
# render the player with teleport count
args.outputs.sprites << { x: args.state.player.x,
y: args.state.player.y,
w: args.state.player.w,
h: args.state.player.h,
path: 'sprites/square-green.png' }
args.outputs.labels << { x: args.state.player.x + 10,
y: args.state.player.y + 40,
text: "teleports: #{args.state.teleports}",
alignment_enum: 1, size_enum: -2 }
# render the target
args.outputs.sprites << { x: args.state.target.x,
y: args.state.target.y,
w: args.state.target.w,
h: args.state.target.h,
path: 'sprites/square-red.png' }
# ====================================================
# run simulation
# ====================================================
# count down calculation
args.state.count_down -= 1
args.state.count_down = -1 if args.state.count_down < -1
# ====================================================
# process player input
# ====================================================
# if it isn't game over let them move
if !game_over? args
dir_y = 0
dir_x = 0
# determine the change horizontally
if args.inputs.keyboard.up
dir_y += args.state.player_speed
elsif args.inputs.keyboard.down
dir_y -= args.state.player_speed
end
# determine the change vertically
if args.inputs.keyboard.left
dir_x -= args.state.player_speed
elsif args.inputs.keyboard.right
dir_x += args.state.player_speed
end
# determine if teleport can be used
if args.inputs.keyboard.key_down.space && args.state.teleports > 0
args.state.teleports -= 1
dir_x *= 20
dir_y *= 20
end
# apply change to player
args.state.player.x += dir_x
args.state.player.y += dir_y
else
# if r is pressed, reset the game
if args.inputs.keyboard.key_down.r
$gtk.reset
return
end
end
# ====================================================
# determine score
# ====================================================
# calculate new score if the player is at goal
if !game_over? args
# if the player is at the goal, then move the goal
if args.state.player.intersect_rect? args.state.target
# increment the goal
args.state.score += 1
# move the goal to a random location
args.state.target = { x: (rand args.grid.w), y: (rand args.grid.h), w: 20, h: 20 }
# make sure the goal is inside the view area
if args.state.target.x < 0
args.state.target.x += 20
elsif args.state.target.x > 1280
args.state.target.x -= 20
end
# make sure the goal is inside the view area
if args.state.target.y < 0
args.state.target.y += 20
elsif args.state.target.y > 720
args.state.target.y -= 20
end
end
end
end
def game_over? args
args.state.count_down < 0
end
$gtk.reset
|
