Game Development Reference
In-Depth Information
Updating enemy sprites
Space Age has four levels; for each level, a special enemy sprite is responsible for the atack
and they are as follows:
F
Level one: Rock
F
Level two: Monster
F
Level three: Robot
F
Level four: Mother Ship
In the starter project, there are only two enemy sprites: Rock and Mother Ship. Both the
Rock and Mother Ship have complete scripts and are ready to paricipate in the game.
We will copy Rock to create Monster and Robot, and then tweak their local variables to
increase the difficulty.
Prepare for lift off
The Rock sprite atacks by crashing and iring ammo. When created as a clone, it coninues
to fall down at a random speed and randomly fires rounds. The speed of falling as well as
the frequency of firing the ammo are configured through
min_speed
,
max_speed
,
and
shoot_random_wait
.
Before duplicaing Rock to create new sprites, irst test the Rock sprite by playing the game.
Click on the green flag, and hit the
Start
buton to start playing. If all is well, you should see
the Level One informaion page scrolling by and the Rock clones shown as a drove. Hold the
ammo, because we have yet to add scripts to the Spaceship Ammo sprite.
