13.1 High-level design for ''cCritterArmed'' and ''cCritterBullet''
We make a new class called cCritterArmed to encapsulate shooting behavior, and derive a cCritterArmedPlayer from it. We'll also have a cCritterArmedRobot that will have the feature of always automatically aiming at whatever cCritter * is stored in its _ptarget field. This is illustrated by Figure 13.1.
Figure 13.1. Diagram of the cCritterArmed and cCritterBullet classes
Table 13.1 lists some of the key new methods and overrides of cCritterBullet and cCritterArmed.
And Figure 13.2 is a sequence diagram showing the flow of method calls involved in having an armed critter shoot a bullet at another critter.
Figure 13.2. A sequence diagram for shooting a bullet
|
Class |
New methods |
Overrides |
|---|---|---|
|
cCritterBullet |
initialize isTarget |
update collide collidesWith |
|
cCritterArmed |
aimAt shoot |
draw update |
