Game Development Reference
In-Depth Information
@implementation Viper02
@synthesize moveToPoint;
+(id)viper:(Example02Controller*)controller{
CGSize gameAreaSize = [controller gameAreaSize];
CGPoint center = CGPointMake(gameAreaSize.width/2, gameAreaSize.height/2);
Viper02* viper = [[Viper02 alloc] initAt:center WithRadius:16 AndImage:@"viper"];
[viper setMoveToPoint:center];
[viper setSpeed:.8];
return [viper autorelease];
}
-(void)step:(Example02Controller*)controller{
CGPoint c = [self center];
float dx = (moveToPoint.x - c.x);
float dy = (moveToPoint.y - c.y);
float theta = atan(dy/dx);
float dxf = cos(theta) * self.speed;
float dyf = sin(theta) * self.speed;
if (dx < 0){
dxf * = −1;
dyf * = −1;
}
c.x += dxf;
c.y += dyf;
if (abs(moveToPoint.x - c.x) < self.speed && abs(moveToPoint.y - c.y) < self.speed){
c.x = moveToPoint.x;
c.y = moveToPoint.y;
}
[self setCenter:c];
}
-(void)doCollision:(Actor02*)actor In:(Example02Controller*)controller{
CGSize gameAreaSize = [controller gameAreaSize];
CGPoint centerOfGame = CGPointMake(gameAreaSize.width/2, gameAreaSize.height/2);
self.center = centerOfGame;
self.moveToPoint = centerOfGame;
[controller removeActor:actor];
}
@end
