Game Development Reference
In-Depth Information
update
and
draw
methods would cycle through
@components
and delegate those calls
to each of them in a sequence. It is important to
update
all components first, and only
then
draw
them. Keep in mind that
@components
array order has significance. First
elements will always be updated and drawn before last ones.
We will also provide
removable?
method that would return
true
for objects that
mark_for_removal
was invoked on. This way we will be able to weed out old bullets
and explosions and feed them to GC.
Next up, base
Component
class:
05-refactor/entities/components/component.rb
1
class
Component
2
def
initialize
(game_object
=
nil
)
3
self
.
object
=
game_object
4
end
5
6
def
update
7
# override
8
end
9
10
def
draw
(viewport)
11
# override
12
end
13
14
protected
15
16
def
object
=
(obj)
17
if
obj
18
@object
=
obj
19
obj
.
components
<<
self
20
end
21
end
22
23
def
x
24
@object
.
x
25
end
26
27
def
y
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@object
.
y
29
end
30
31
def
object
32
@object
