Game Development Reference
In-Depth Information
ObjectPool
before placing a spawn point only where there are no other game objects
around in, say, 150 pixel radius:
class
Map
# ...
def
find_spawn_point
while
true
x
=
rand
(
0.
.
MAP_WIDTH
*
TILE_SIZE
)
y
=
rand
(
0.
.
MAP_HEIGHT
*
TILE_SIZE
)
if
can_move_to?(x, y)
&&
@object_pool
.
nearby_point(x, y,
150
)
.
empty?
return
[
x, y
]
end
end
end
# ...
end
How about powerups? They can also spawn in the middle of a forest, and while tanks
are not seeking them yet, we will be implementing this behavior, and leading tanks into
wilderness of trees is not the best idea ever. Let's fix it too:
class
Map
# ...
def
generate_powerups
pups
= 0
target_pups
=
rand
(
20.
.
30
)
while
pups
<
target_pups
do
x
=
rand
(
0.
.
MAP_WIDTH
*
TILE_SIZE
)
y
=
rand
(
0.
.
MAP_HEIGHT
*
TILE_SIZE
)
if
tile_at(x, y)
!=
@water
&&
@object_pool
.
nearby_point(x, y,
150
)
.
empty?
random_powerup
.
new(
@object_pool
, x, y)
pups
+= 1
end
end
end
# ...
end
We could also reduce tree count, but that would make the map look worse, so we are going
to keep this in our pocket as a mean of last resort.
