弹丸类以及魂类的构想

UE4里有弹丸的MovementComponent，十分明显需要这个。

但是魂类呢？放在Tick里，我已经实现了，但是总感觉是对资源的浪费

于是

从Learning.C++.by.Creating.Games.with.UE4.2015上复制下来的简单怪物AI代码，

void AMonster::Tick(float DeltaSeconds)
{
Super::Tick( DeltaSeconds );
// basic intel: move the monster towards the player
AAvatar *avatar = Cast<AAvatar>(
UGameplayStatics::GetPlayerPawn(GetWorld(), 0) );
if( !avatar ) return;
FVector toPlayer = avatar->GetActorLocation() - GetActorLocation();
toPlayer.Normalize(); // reduce to unit vector
// Actually move the monster towards the player a bit
AddMovementInput(toPlayer, Speed*DeltaSeconds);
// At least face the target
// Gets you the rotator to turn something
// that looks in the `toPlayer` direction
FRotator toPlayerRotation = toPlayer.Rotation();
toPlayerRotation.Pitch = 0; // 0 off the pitch
RootComponent->SetWorldRotation( toPlayerRotation );
}

看了一下，感觉魂类用ProjectileMovement会比较好,如果需要让物体不停旋转用RotatingMovement

可以少些很多东西

2016.4.6

发现CrowdFollowingComponent，以后可以试着用一下