Game Development Reference
In-Depth Information
11-powerups/entities/components/powerup_graphics.rb
1
class
PowerupGraphics
<
Component
2
def
initialize
(object, type)
3
super
(object)
4
@type
=
type
5
end
6
7
def
draw
(viewport)
8
image
.
draw(x
- 12
, y
- 12
,
1
)
9
Utils
.
mark_corners(object
.
box)
if
$debug
10
end
11
12
private
13
14
def
image
15
@image
||=
images
.
frame(
"
#{
@type
}
.png"
)
16
end
17
18
def
images
19
@@images
||=
Gosu
::
TexturePacker
.
load_json(
$window
,
Utils
.
media_path(
'pickups.json'
))
20
21
end
22
end
Implementing Powerup Sounds
It's even simpler with sounds. All powerups will emit a mellow “bleep” when picked
up,
so
PowerupSounds
can
be
completely
static,
like
ExplosionSounds
or
BulletSounds
:
11-powerups/entities/components/powerup_sounds.rb
1
class
PowerupSounds
2
class
<<
self
3
def
play
(object, camera)
4
volume, pan
=
Utils
.
volume_and_pan(object, camera)
5
sound
.
play(object
.
object_id, pan, volume)
6
end
7
8
private
9
10
def
sound
11
@@sound
||=
StereoSample
.
new(
$window
,
Utils
.
media_path(
'powerup.mp3'
))
12
13
end
