Game Development Reference
In-Depth Information
1
class
Powerup
<
GameObject
2
def
initialize
(object_pool, x, y)
3
super
4
PowerupGraphics
.
new(
self
, graphics)
5
end
6
7
def
box
8
[
x
- 8
, y
- 8
,
x
+ 8
, y
- 8
,
9
x
+ 8
, y
+ 8
,
10
x
- 8
, y
+ 8]
11
12
end
13
14
def
on_collision
(object)
15
if
pickup(object)
16
PowerupSounds
.
play(object, object_pool
.
camera)
17
remove
18
end
19
end
20
21
def
pickup
(object)
22
# override and implement application
23
end
24
25
def
remove
26
object_pool
.
powerup_respawn_queue
.
enqueue(
27
respawn_delay,
28
self
.
class, x, y)
29
mark_for_removal
30
end
31
32
def
respawn_delay
33
30
34
end
35
end
Ignore
Powerup#remove
,
we
will
get
to
it
when
implementing
PowerupRespawnQueue
. The rest should be straightforward.
Implementing Powerup Graphics
All
powerups
will
use
the
same
sprite
sheet,
so
there
could
be
a
single
PowerupGraphics
class
that
will
be
rendering
given
sprite
type.
We
will
use
gosu-texture-packer
gem, since sprite sheet is conveniently packed already.
