Game Development Reference
In-Depth Information
class
TankGraphics
<
Component
# ...
DEBUG_COLORS
= [
Gosu
::
Color
::
RED
,
Gosu
::
Color
::
BLUE
,
Gosu
::
Color
::
YELLOW
,
Gosu
::
Color
::
WHITE
]
# ...
def
draw_bounding_box
i
= 0
object
.
box
.
each_slice(
2
)
do
|
x, y
|
color
=
DEBUG_COLORS
[
i
]
$window
.
draw_triangle(
x
- 3
, y
- 3
, color,
x, y, color,
x
+ 3
, y
- 3
, color,
100
)
i
=
(i
+ 1
)
% 4
end
end
# ...
Now we can visually test bounding box edges and see that they actually are where they
belong.
High precision bounding boxes
Time to pimp our
TankPhysics
to detect those collisions. While our algorithm is pretty
fast, it doesn't make sense to check collisions for objects that are pretty far apart. This is
why we need our
ObjectPool
to know how to query objects in close proximity.
class
ObjectPool
# ...
def
nearby
(object, max_distance)
@objects
.
select
do
|
obj
|
