void UParabolicMovementComponent::InitComputeParams()
{
//无目标时if (!bHasTarget){
//      指定出射角度时计算方法
//      FQuat quat = UpdatedComponent->GetComponentQuat() * FQuat(Rotation);
//      DirHorz = quat.Rotator().Vector();
//      float Theta = DirHorz.Z / DirHorz.Size2D();
//      VerticalSpeed = HorzSpeed * tan(Theta);
//      DirHorz.Z = 0;//指定最大高度时计算方法
DirHorz = UpdatedComponent->GetComponentRotation().Vector();DirHorz.Z = 0;DirHorz.Normalize();
//若无目标则默认G=980.0fVerticalSpeed = FMath::Sqrt(2 * Gravity * MaxHeight);}
//有目标时else{DirHorz = GetTargetPosition() - GetHostPosition();float HeightDist = DirHorz.Z;DirHorz.Z = 0;float Dist = DirHorz.Size();DirHorz.Normalize();TotalTime = Dist / HorzSpeed;VerticalSpeed = (2.0f * (MaxHeight + FMath::Sqrt(MaxHeight*MaxHeight - MaxHeight*HeightDist))) / TotalTime;Gravity = VerticalSpeed * VerticalSpeed / (2.0f * MaxHeight);//VerticalSpeed = HeightDist / TotalTime + .5f * Gravity * TotalTime;}CurrentTime = 0;StartPos = GetHostPosition();Velocity = DirHorz * HorzSpeed + FVector::UpVector * VerticalSpeed;UpdateComponentVelocity();
}//计算当前时刻所在位置
void UParabolicMovementComponent::ComputeMovement(float DeltaTime, FVector& OutMoveDelta)
{CurrentTime += DeltaTime;if(bHasTarget){if (CurrentTime >= TotalTime){CurrentTime = TotalTime;bStop = true;}}float CurrentVertSpeed = VerticalSpeed - Gravity * CurrentTime;float fVertDist = .5f * (VerticalSpeed + CurrentVertSpeed) * CurrentTime;OutMoveDelta = StartPos + CurrentTime * HorzSpeed * DirHorz + fVertDist * FVector::UpVector - GetHostPosition();Velocity = DirHorz * HorzSpeed + FVector::UpVector * CurrentVertSpeed;//OutNewRotation = Velocity.Rotation().Quaternion();
}

物体以某个初速度方向出发后，先保持稳定线性速度，以一定角速度向目标点旋转，当速度方向和自身-目标方向的夹角小于一定角度后，速度方向立刻改为自身-目标方向，进行直线加速。

void UMissleMovementComponent::InitComputeParams()
{Dir = (UpdatedComponent->GetComponentQuat() * Rotation.Quaternion()).Rotator().Vector();Dir.Normalize();Velocity = Dir * StartSpeed;CurrentSpeed = StartSpeed;UpdateComponentVelocity();
}void UMissleMovementComponent::ComputeMovement(float DeltaTime, FVector& OutMoveDelta)
{float MinDist = GetMinimalDistance();static const float fLimit = (float)cos(FMath::DegreesToRadians(LimitDegree));FVector vDir;vDir = GetTargetPosition() - GetHostPosition();float fLeft = vDir.Size();vDir.Normalize();float fDist = CurrentSpeed * DeltaTime;  if (fDist >= fLeft){fDist = fLeft;bStop = true;}float fAngle = Velocity.GetSafeNormal() | vDir;//如果小于最小距离;或者角度相近，使用直线if (fLeft < MinDist || fAngle > fLimit){CurrentSpeed += LinearAcc * DeltaTime;OutMoveDelta = vDir * fDist;Velocity = vDir * CurrentSpeed;}else{OutMoveDelta = Velocity * DeltaTime;FVector vUp = Velocity ^ vDir;vUp.Normalize();FQuat q(vUp, RotationSpeed * DeltaTime);Velocity = q.RotateVector(Velocity);}//OutNewRotation = Velocity.ToOrientationQuat();//OutNewRotation = Velocity.Rotation().Quaternion();
}
float UMissleMovementComponent::GetMinimalDistance()
{float d = 2.0f * StartSpeed / RotationSpeed;return d;
}