Game Development Reference
In-Depth Information
We
have
to
add
@speed_modifier
to
Tank
class
and
use
it
in
TankPhysics#update
when calculating movement distance.
# 11-powerups/entities/tank.rb
class
Tank
<
GameObject
# ...
attr_accessor
:speed_modifier
# ...
def
reset_modifiers
# ...
@speed_modifier
= 1
end
# ...
end
# 11-powerups/entities/components/tank_physics.rb
class
TankPhysics
<
Component
# ...
def
update
# ...
new_x, new_y
=
x, y
speed
=
apply_movement_penalty(
@speed
)
shift
=
Utils
.
adjust_speed(speed)
*
object
.
speed_modifier
# ...
end
# ...
end
Camera#update
has also refer to
Tank#speed_modifier
, otherwise the operator
will fail to catch up and camera will be lagging behind.
class
Camera
# ...
def
update
# ...
shift
=
Utils
.
adjust_speed(
@target
.
physics
.
speed)
.
floor
*
@target
.
speed_modifier
+ 1
# ...
end
# ...
end
