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def tick args
args.state.player.x ||= 100
args.state.player.y ||= 100
args.state.player.w ||= 64
args.state.player.h ||= 64
args.state.player.direction ||= 1
args.state.player.is_moving = false
# get the keyboard input and set player properties
if args.inputs.keyboard.right
args.state.player.x += 3
args.state.player.direction = 1
args.state.player.started_running_at ||= args.state.tick_count
elsif args.inputs.keyboard.left
args.state.player.x -= 3
args.state.player.direction = -1
args.state.player.started_running_at ||= args.state.tick_count
end
if args.inputs.keyboard.up
args.state.player.y += 1
args.state.player.started_running_at ||= args.state.tick_count
elsif args.inputs.keyboard.down
args.state.player.y -= 1
args.state.player.started_running_at ||= args.state.tick_count
end
# if no arrow keys are being pressed, set the player as not moving
if !args.inputs.keyboard.directional_vector
args.state.player.started_running_at = nil
end
# wrap player around the stage
if args.state.player.x > 1280
args.state.player.x = -64
args.state.player.started_running_at ||= args.state.tick_count
elsif args.state.player.x < -64
args.state.player.x = 1280
args.state.player.started_running_at ||= args.state.tick_count
end
if args.state.player.y > 720
args.state.player.y = -64
args.state.player.started_running_at ||= args.state.tick_count
elsif args.state.player.y < -64
args.state.player.y = 720
args.state.player.started_running_at ||= args.state.tick_count
end
# render player as standing or running
if args.state.player.started_running_at
args.outputs.sprites << running_sprite(args)
else
args.outputs.sprites << standing_sprite(args)
end
args.outputs.labels << [30, 700, "Use arrow keys to move around."]
end
def standing_sprite args
{
x: args.state.player.x,
y: args.state.player.y,
w: args.state.player.w,
h: args.state.player.h,
path: "sprites/horizontal-stand.png",
flip_horizontally: args.state.player.direction > 0
}
end
def running_sprite args
if !args.state.player.started_running_at
tile_index = 0
else
how_many_frames_in_sprite_sheet = 6
how_many_ticks_to_hold_each_frame = 3
should_the_index_repeat = true
tile_index = args.state
.player
.started_running_at
.frame_index(how_many_frames_in_sprite_sheet,
how_many_ticks_to_hold_each_frame,
should_the_index_repeat)
end
{
x: args.state.player.x,
y: args.state.player.y,
w: args.state.player.w,
h: args.state.player.h,
path: 'sprites/horizontal-run.png',
tile_x: 0 + (tile_index * args.state.player.w),
tile_y: 0,
tile_w: args.state.player.w,
tile_h: args.state.player.h,
flip_horizontally: args.state.player.direction > 0,
}
end
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