C++ GetHeadingFromVector函数代码示例

bool CWeapon::TryTargetRotate(CUnit* unit, bool userTarget){
	float3 tempTargetPos(helper->GetUnitErrorPos(unit,owner->allyteam));
	tempTargetPos+=errorVector*(weaponDef->targetMoveError*30*unit->speed.Length()*(1.0f-owner->limExperience));
	float appHeight=ground->GetApproximateHeight(tempTargetPos.x,tempTargetPos.z)+2;
	if(tempTargetPos.y < appHeight){
		tempTargetPos.y=appHeight;
	}
	short weaponHeadding = GetHeadingFromVector(mainDir.x, mainDir.z);
	short enemyHeadding = GetHeadingFromVector(
		tempTargetPos.x - weaponPos.x, tempTargetPos.z - weaponPos.z);
	return TryTargetHeading(enemyHeadding - weaponHeadding, tempTargetPos,userTarget, unit);
}

void CFarTextureHandler::DrawFarTexture(const CSolidObject* obj, CVertexArray* va)
{
	const int farTextureNum = cache[obj->team][obj->model->id];

	// not found in the atlas
	if (farTextureNum <= 0)
		return;

	const float3 interPos = obj->drawPos + UpVector * obj->model->height * 0.5f;

	// indicates the orientation to draw
	static const int USHRT_MAX_ = (1 << 16);
	const int orient_step = USHRT_MAX_ / numOrientations;

	int orient = GetHeadingFromVector(-camera->forward.x, -camera->forward.z) - obj->heading;
		orient += USHRT_MAX_;          // make it positive only
		orient += (orient_step >> 1);  // we want that frontdir is from -orient_step/2 upto orient_step/2
		orient %= USHRT_MAX_;          // we have an angle so it's periodical
		orient /= orient_step;         // get the final direction index

	const float iconSizeX = float(this->iconSizeX) / texSizeX;
	const float iconSizeY = float(this->iconSizeY) / texSizeY;
	const float2 texcoords = GetTextureCoords(farTextureNum - 1, orient);

	const float3 curad = camera->up *    obj->model->radius;
	const float3 crrad = camera->right * obj->model->radius;

	va->AddVertexQT(interPos - curad + crrad, texcoords.x, texcoords.y );
	va->AddVertexQT(interPos + curad + crrad, texcoords.x, texcoords.y + iconSizeY);
	va->AddVertexQT(interPos + curad - crrad, texcoords.x + iconSizeX, texcoords.y + iconSizeY);
	va->AddVertexQT(interPos - curad - crrad, texcoords.x + iconSizeX, texcoords.y );
}

void HUDDrawer::DrawCameraDirectionArrow(const CUnit* unit)
{
	glDisable(GL_TEXTURE_2D);

	if (unit->moveType->useHeading) {
		glPushMatrix();
			glTranslatef(-0.8f, -0.4f, 0.0f);
			glScalef(0.33f, 0.33f * globalRendering->aspectRatio, 0.33f);

			glRotatef(
				GetHeadingFromVector(camera->forward.x, camera->forward.z) * 180.0f / 32768 + 180,
				0.0f, 0.0f, 1.0f
			);
			glScalef(0.4f, 0.4f, 0.3f);

			glColor4f(0.4f, 0.4f, 1.0f, 0.6f);
			glBegin(GL_TRIANGLE_FAN);
				glVertex2f(-0.2f, -0.3f);
				glVertex2f(-0.2f,  0.3f);
				glVertex2f( 0.0f,  0.5f);
				glVertex2f( 0.2f,  0.3f);
				glVertex2f( 0.2f, -0.3f);
				glVertex2f(-0.2f, -0.3f);
			glEnd();
		glPopMatrix();
	}
}

void CUnit::FinishedBuilding(void)
{
	beingBuilt = false;
	buildProgress = 1.0f;

	if (soloBuilder) {
		DeleteDeathDependence(soloBuilder);
		soloBuilder = NULL;
	}

	if (!(immobile && (mass == 100000))) {
		mass = unitDef->mass;		//set this now so that the unit is harder to move during build
	}

	ChangeLos(realLosRadius,realAirLosRadius);

	if (unitDef->startCloaked) {
		wantCloak = true;
		isCloaked = true;
	}

	if (unitDef->windGenerator>0) {
		if (wind.curStrength > unitDef->windGenerator) {
			cob->Call(COBFN_SetSpeed, (int)(unitDef->windGenerator * 3000.0f));
		} else {
			cob->Call(COBFN_SetSpeed, (int)(wind.curStrength       * 3000.0f));
		}
		cob->Call(COBFN_SetDirection, (int)GetHeadingFromVector(-wind.curDir.x, -wind.curDir.z));
	}

	if (unitDef->activateWhenBuilt) {
		Activate();
	}

	gs->Team(team)->metalStorage  += unitDef->metalStorage;
	gs->Team(team)->energyStorage += unitDef->energyStorage;

	//Sets the frontdir in sync with heading.
	frontdir = GetVectorFromHeading(heading) + float3(0,frontdir.y,0);

	if (unitDef->isAirBase) {
		airBaseHandler->RegisterAirBase(this);
	}

	luaCallIns.UnitFinished(this);
	globalAI->UnitFinished(this);

	if (unitDef->isFeature) {
		UnBlock();
		CFeature* f =
			featureHandler->CreateWreckage(pos, wreckName, heading, buildFacing,
			                               0, team, false, "");
		if (f) {
			f->blockHeightChanges = true;
		}
		KillUnit(false, true, 0);
	}
}

void CUnit::PushWind(float x, float z, float strength)
{
    if(strength > unitDef->windGenerator)
    {
        cob->Call(COBFN_SetSpeed, (int)(unitDef->windGenerator*3000.0f));
    }
    else
    {
        cob->Call(COBFN_SetSpeed, (int)(strength*3000.0f));
    }

    cob->Call(COBFN_SetDirection, (int)GetHeadingFromVector(-x, -z));
}

void CFeature::ForcedSpin(const float3& newDir)
{
	float3 updir = UpVector;
	if (updir == newDir) {
		//FIXME perhaps save the old right,up,front directions, so we can
		// reconstruct the old upvector and generate a better assumption for updir
		updir -= GetVectorFromHeading(heading);
	}
	float3 rightdir = newDir.cross(updir).Normalize();
	updir = rightdir.cross(newDir);
	transMatrix = CMatrix44f(pos, -rightdir, updir, newDir);
	heading = GetHeadingFromVector(newDir.x, newDir.z);
}

void CAirMoveType::SetState(AAirMoveType::AircraftState state)
{
	// this state is only used by CTAAirMoveType
	assert(state != AIRCRAFT_HOVERING);

	if (aircraftState == AIRCRAFT_CRASHING || state == aircraftState)
		return;

	/*
	if (state == AIRCRAFT_LANDING)
		owner->cob->Call(COBFN_Deactivate);
	else if (state == aircraft_flying)
		// cob->Call(COBFN_Activate);
	*/

	if (state == AIRCRAFT_FLYING) {
		owner->Activate();
		owner->script->StartMoving();
	}

	if (state == AIRCRAFT_LANDED) {
		owner->heading = GetHeadingFromVector(owner->frontdir.x, owner->frontdir.z);
		owner->physicalState = CSolidObject::OnGround;
		owner->useAirLos = false;
	} else {
		owner->physicalState = CSolidObject::Flying;
		owner->useAirLos = true;
		if (state != AIRCRAFT_LANDING) {
			reservedLandingPos.x = -1;
			owner->UnBlock();
		}
	}

	if (aircraftState == AIRCRAFT_LANDED && reservedLandingPos.x > 0) {
		reservedLandingPos.x = -1;
	}
	subState = 0;

	// make sure we only go into takeoff if actually landed
	if (state != AIRCRAFT_TAKEOFF || aircraftState == AIRCRAFT_LANDED) {
		aircraftState = state;
	} else {
		aircraftState = AIRCRAFT_TAKEOFF;
	}
}

void CFeature::ForcedSpin(const float3& newDir)
{
/*
	heading = GetHeadingFromVector(newDir.x, newDir.z);
	CalculateTransform();
	if (def->drawType >= DRAWTYPE_TREE) {
		treeDrawer->DeleteTree(pos);
		treeDrawer->AddTree(def->drawType - 1, pos, 1.0f);
	}
*/

	float3 updir = UpVector;
	if (updir == newDir) {
		//FIXME perhaps save the old right,up,front directions, so we can
		// reconstruct the old upvector and generate a better assumption for updir
		updir -= GetVectorFromHeading(heading);
	}
	float3 rightdir = newDir.cross(updir).Normalize();
	updir = rightdir.cross(newDir);
	transMatrix = CMatrix44f(pos, -rightdir, updir, newDir);
	heading = GetHeadingFromVector(newDir.x, newDir.z);
}

void CAirMoveType::SetState(CAirMoveType::AircraftState state)
{
	if(aircraftState==AIRCRAFT_CRASHING || state==aircraftState)
		return;

/*	if (state == AIRCRAFT_LANDING)
		owner->animator->AnimAction(ANIMFN_Deactivate);
		else if (state == aircraft_flying)
		//animator->AnimAction(ANIMFN_Activate); */
	
	if (state == AIRCRAFT_FLYING) {
		owner->Activate();
		owner->animator->AnimAction(ANIMFN_StartMoving);
	}

	if(state==AIRCRAFT_LANDED){
		owner->heading=GetHeadingFromVector(owner->frontdir.x, owner->frontdir.z);
		owner->physicalState = CSolidObject::OnGround;
		owner->useAirLos=false;
	}else{
		owner->physicalState = CSolidObject::Flying;
		owner->useAirLos=true;
		if(state!=AIRCRAFT_LANDING){
			reservedLandingPos.x=-1;
			owner->UnBlock();
		}
	}

	if(aircraftState==AIRCRAFT_LANDED && reservedLandingPos.x>0){
		reservedLandingPos.x=-1;
	}
	subState=0;
	if(state!=AIRCRAFT_TAKEOFF || aircraftState==AIRCRAFT_LANDED)		//make sure we only go into takeoff if actually landed
		aircraftState=state;
	else
		aircraftState=AIRCRAFT_TAKEOFF;
}

void CFactory::UpdateBuild(CUnit* buildee) {
	if (stunned)
		return;

	// factory not under construction and
	// nanolathing unit: continue building
	lastBuildUpdateFrame = gs->frameNum;

	// buildPiece is the rotating platform
	const int buildPiece = GetBuildPiece();
	const float3& buildPos = CalcBuildPos(buildPiece);
	const CMatrix44f& mat = script->GetPieceMatrix(buildPiece);
	const int h = GetHeadingFromVector(mat[2], mat[10]); //! x.z, z.z

	float3 buildeePos = buildPos;

	// rotate unit nanoframe with platform
	buildee->heading = (-h + GetHeadingFromFacing(buildFacing)) & (SPRING_CIRCLE_DIVS - 1);

	if (buildee->unitDef->floatOnWater && (buildeePos.y <= 0.0f))
		buildeePos.y = -buildee->unitDef->waterline;

	buildee->Move3D(buildeePos, false);
	buildee->UpdateDirVectors(false);
	buildee->UpdateMidAndAimPos();

	const CCommandQueue& queue = commandAI->commandQue;

	if (!queue.empty() && (queue.front().GetID() == CMD_WAIT)) {
		buildee->AddBuildPower(0, this);
	} else {
		if (buildee->AddBuildPower(buildSpeed, this)) {
			CreateNanoParticle();
		}
	}
}

bool CHoverAirMoveType::Update()
{
	const float3 lastPos = owner->pos;
	const float4 lastSpd = owner->speed;

	AAirMoveType::Update();

	if ((owner->IsStunned() && !owner->IsCrashing()) || owner->beingBuilt) {
		wantedSpeed = ZeroVector;

		UpdateAirPhysics();
		return (HandleCollisions(collide && !owner->beingBuilt && (padStatus == PAD_STATUS_FLYING) && (aircraftState != AIRCRAFT_TAKEOFF)));
	}

	// allow us to stop if wanted (changes aircraft state)
	if (wantToStop)
		ExecuteStop();

	if (aircraftState != AIRCRAFT_CRASHING) {
		if (owner->UnderFirstPersonControl()) {
			SetState(AIRCRAFT_FLYING);

			const FPSUnitController& con = owner->fpsControlPlayer->fpsController;

			const float3 forward = con.viewDir;
			const float3 right = forward.cross(UpVector);
			const float3 nextPos = lastPos + owner->speed;

			float3 flatForward = forward;
			flatForward.Normalize2D();

			wantedSpeed = ZeroVector;

			if (con.forward) wantedSpeed += flatForward;
			if (con.back   ) wantedSpeed -= flatForward;
			if (con.right  ) wantedSpeed += right;
			if (con.left   ) wantedSpeed -= right;

			wantedSpeed.Normalize();
			wantedSpeed *= maxSpeed;

			if (!nextPos.IsInBounds()) {
				owner->SetVelocityAndSpeed(ZeroVector);
			}

			UpdateAirPhysics();
			wantedHeading = GetHeadingFromVector(flatForward.x, flatForward.z);
		}

		if (reservedPad != NULL) {
			MoveToRepairPad();

			if (padStatus >= PAD_STATUS_LANDING) {
				flyState = FLY_LANDING;
			}
		}
	}

	switch (aircraftState) {
		case AIRCRAFT_LANDED:
			UpdateLanded();
			break;
		case AIRCRAFT_TAKEOFF:
			UpdateTakeoff();
			break;
		case AIRCRAFT_FLYING:
			UpdateFlying();
			break;
		case AIRCRAFT_LANDING:
			UpdateLanding();
			break;
		case AIRCRAFT_HOVERING:
			UpdateHovering();
			break;
		case AIRCRAFT_CRASHING: {
			UpdateAirPhysics();

			if ((CGround::GetHeightAboveWater(owner->pos.x, owner->pos.z) + 5.0f + owner->radius) > owner->pos.y) {
				owner->ClearPhysicalStateBit(CSolidObject::PSTATE_BIT_CRASHING);
				owner->KillUnit(NULL, true, false);
			} else {
				#define SPIN_DIR(o) ((o->id & 1) * 2 - 1)
				wantedHeading = GetHeadingFromVector(owner->rightdir.x * SPIN_DIR(owner), owner->rightdir.z * SPIN_DIR(owner));
				wantedHeight = 0.0f;
				#undef SPIN_DIR
			}

			new CSmokeProjectile(owner, owner->midPos, gs->randVector() * 0.08f, 100 + gs->randFloat() * 50, 5, 0.2f, 0.4f);
		} break;
	}

	if (lastSpd == ZeroVector && owner->speed != ZeroVector) { owner->script->StartMoving(false); }
	if (lastSpd != ZeroVector && owner->speed == ZeroVector) { owner->script->StopMoving(); }

	// Banking requires deltaSpeed.y = 0
	deltaSpeed = owner->speed - lastSpd;
	deltaSpeed.y = 0.0f;

	// Turn and bank and move; update dirs
	UpdateHeading();
//.........这里部分代码省略.........

//.........这里部分代码省略.........

			case FLY_CIRCLING: {
				if ((++waitCounter) > ((GAME_SPEED * 3) + 10)) {
					if (airStrafe) {
						float3 relPos = pos - circlingPos;

						if (relPos.x < 0.0001f && relPos.x > -0.0001f) {
							relPos.x = 0.0001f;
						}

						static CMatrix44f rot(0.0f, fastmath::PI / 4.0f, 0.0f);

						// make sure the point is on the circle, go there in a straight line
						goalPos = circlingPos + (rot.Mul(relPos.Normalize2D()) * goalDistance);
					}
					waitCounter = 0;
				}
			} break;

			case FLY_ATTACKING: {
				if (airStrafe) {
					float3 relPos = pos - circlingPos;

					if (relPos.x < 0.0001f && relPos.x > -0.0001f) {
						relPos.x = 0.0001f;
					}

					CMatrix44f rot;

					if (gs->randFloat() > 0.5f) {
						rot.RotateY(0.6f + gs->randFloat() * 0.6f);
					} else {
						rot.RotateY(-(0.6f + gs->randFloat() * 0.6f));
					}

					// Go there in a straight line
					goalPos = circlingPos + (rot.Mul(relPos.Normalize2D()) * goalDistance);
				}
			} break;

			case FLY_LANDING: {
			} break;
		}
	}

	// not "close" to goal yet, so keep going
	// use 2D math since goal is on the ground
	// but we are not
	goalVec.y = 0.0f;

	// if we are close to our goal, we should
	// adjust speed st. we never overshoot it
	// (by respecting current brake-distance)
	const float curSpeed = owner->speed.Length2D();
	const float brakeDist = (0.5f * curSpeed * curSpeed) / decRate;
	const float goalDist = goalVec.Length() + 0.1f;
	const float goalSpeed =
		(maxSpeed          ) * (goalDist >  brakeDist) +
		(curSpeed - decRate) * (goalDist <= brakeDist);

	if (goalDist > goalSpeed) {
		// update our velocity and heading so long as goal is still
		// further away than the distance we can cover in one frame
		// we must use a variable-size "dead zone" to avoid freezing
		// in mid-air or oscillation behavior at very close distances
		// NOTE:
		//   wantedSpeed is a vector, so even aircraft with turnRate=0
		//   are coincidentally able to reach any goal by side-strafing
		wantedHeading = GetHeadingFromVector(goalVec.x, goalVec.z);
		wantedSpeed = (goalVec / goalDist) * goalSpeed;
	} else {
		// switch to hovering (if !CanLand()))
		if (flyState != FLY_ATTACKING) {
			ExecuteStop();
		}
	}

	// redundant, done in Update()
	// UpdateHeading();
	UpdateAirPhysics();

	// Point toward goal or forward - unless we just passed it to get to another goal
	if ((flyState == FLY_ATTACKING) || (flyState == FLY_CIRCLING)) {
		goalVec = circlingPos - pos;
	} else {
		const bool b0 = (flyState != FLY_LANDING && (owner->commandAI->HasMoreMoveCommands()));
		const bool b1 = (goalDist < brakeDist && goalDist > 1.0f);

		if (b0 && b1) {
			goalVec = owner->frontdir;
		} else {
			goalVec = goalPos - pos;
		}
	}

	if (goalVec.SqLength2D() > 1.0f) {
		// update heading again in case goalVec changed
		wantedHeading = GetHeadingFromVector(goalVec.x, goalVec.z);
	}
}

//.........这里部分代码省略.........
			case FLY_CIRCLING:
				waitCounter++;
				if (waitCounter > 100) {
					//logOutput.Print("moving circlepos");
					float3 relPos = pos - circlingPos;
					if(relPos.x<0.0001f && relPos.x>-0.0001f)
						relPos.x=0.0001f;
					relPos.y = 0;
					relPos.Normalize();
					CMatrix44f rot;
					rot.RotateY(1.0f);
					float3 newPos = rot.Mul(relPos);

					//Make sure the point is on the circle
					newPos = newPos.Normalize() * goalDistance;

					//Go there in a straight line
					goalPos = circlingPos + newPos;
					waitCounter = 0;
				}
				break;
			case FLY_ATTACKING:{
				//logOutput.Print("wait is %d", waitCounter);
				float3 relPos = pos - circlingPos;
				if(relPos.x<0.0001f && relPos.x>-0.0001f)
					relPos.x=0.0001f;
				relPos.y = 0;
				relPos.Normalize();
				CMatrix44f rot;
				if (gs->randFloat()>0.5f)
					rot.RotateY(0.6f+gs->randFloat()*0.6f);
				else
					rot.RotateY(-(0.6f+gs->randFloat()*0.6f));
				float3 newPos = rot.Mul(relPos);
				newPos = newPos.Normalize() * goalDistance;

				//Go there in a straight line
				goalPos = circlingPos + newPos;
//				logOutput.Print("Changed circle pos");
				break;}
			case FLY_LANDING:{
/*				//First check if we can land around here somewhere
				if (!CanLandAt(pos)) {
					//Check the surrounding area for a suitable position
					float3 newPos;
					bool found = FindLandingSpot(pos, newPos);
					if (found) {
						SetState(AIRCRAFT_FLYING);		
						logOutput.Print("Found a landingspot when cruising around");
						goalPos = newPos;			
						return;
					}
				}
				else {
					SetState(AIRCRAFT_LANDING);
					return;
				}

				float3 relPos = pos - circlingPos;
				relPos.y = 0;
				CMatrix44f rot;
				rot.RotateY(2.0f);
				float3 newPos = rot.Mul(relPos);

				//Make sure the point is on the circle
				newPos = newPos.Normalize() * goalDistance;

				//Go there in a straight line
				goalPos = circlingPos + newPos;
				waitCounter = 0;
	*/			break;}
		}
	}
	//no, so go there!
	
	dir.y = 0;
	float realMax = maxSpeed;
	float dist=dir.Length2D();

	//If we are close to our goal, we should go slow enough to be able to break in time
	//if in attack mode dont slow down
	if (flyState!=FLY_ATTACKING && dist < breakDistance) {
		realMax = dist/(speed.Length2D()+0.01f) * decRate;
		//logOutput.Print("Break! %f %f %f", maxSpeed, dir.Length2D(), realMax);
	}

	wantedSpeed = dir.Normalize() * realMax;

	UpdateAirPhysics();


	//Point toward goal or forward
	if ((flyState == FLY_ATTACKING) || (flyState == FLY_CIRCLING)) {
		dir = circlingPos - pos;
	} else {
		dir = goalPos - pos;
	}
	if(dir.SqLength2D()>1)
		wantedHeading = GetHeadingFromVector(dir.x, dir.z);
}

void CTAAirMoveType::Update()
{
	//Handy stuff. Wonder if there is a better way?
	float3 &pos=owner->pos;
	SyncedFloat3 &rightdir = owner->rightdir;
	SyncedFloat3 &frontdir = owner->frontdir;
	SyncedFloat3 &updir = owner->updir;
	float3 &speed = owner->speed;

	//This is only set to false after the plane has finished constructing
	if (useHeading){
		useHeading = false;
		SetState(AIRCRAFT_TAKEOFF);
	}

	//Allow us to stop if wanted
	if (wantToStop)
		ExecuteStop();

	float3 lastSpeed = speed;

	if(owner->stunned){
		wantedSpeed=ZeroVector;
		UpdateAirPhysics();
	} else {
#ifdef DIRECT_CONTROL_ALLOWED
		if(owner->directControl){
			DirectControlStruct* dc=owner->directControl;
			SetState(AIRCRAFT_FLYING);

			float3 forward=dc->viewDir;
			float3 flatForward=forward;
			flatForward.y=0;
			flatForward.Normalize();
			float3 right=forward.cross(UpVector);

			wantedSpeed=ZeroVector;
			if(dc->forward)
				wantedSpeed+=flatForward;
			if(dc->back)
				wantedSpeed-=flatForward;
			if(dc->right)
				wantedSpeed+=right;
			if(dc->left)
				wantedSpeed-=right;
			wantedSpeed.Normalize();
			wantedSpeed*=maxSpeed;
			UpdateAirPhysics();
			wantedHeading=GetHeadingFromVector(flatForward.x,flatForward.z);

		} else 
#endif
		{

			if(reservedPad){
				CUnit* unit=reservedPad->unit;
				float3 relPos=unit->localmodel->GetPiecePos(reservedPad->piece);
				float3 pos=unit->pos + unit->frontdir*relPos.z + unit->updir*relPos.y + unit->rightdir*relPos.x;
				if(padStatus==0){
					if(aircraftState!=AIRCRAFT_FLYING && aircraftState!=AIRCRAFT_TAKEOFF)
						SetState(AIRCRAFT_FLYING);

					goalPos=pos;

					if(pos.distance(owner->pos)<400){
						padStatus=1;
					}
					//geometricObjects->AddLine(owner->pos,pos,1,0,1);
				} else if(padStatus==1){
					if(aircraftState!=AIRCRAFT_FLYING)
						SetState(AIRCRAFT_FLYING);
					flyState=FLY_LANDING;

					goalPos=pos;
					reservedLandingPos=pos;
					wantedHeight=pos.y-ground->GetHeight(pos.x,pos.z);

					if(owner->pos.distance(pos)<3 || aircraftState==AIRCRAFT_LANDED){
						padStatus=2;
					}
					//geometricObjects->AddLine(owner->pos,pos,10,0,1);
				} else {
					if(aircraftState!=AIRCRAFT_LANDED)
						SetState(AIRCRAFT_LANDED);
					
					owner->pos=pos;

					owner->AddBuildPower(unit->unitDef->buildSpeed/30,unit);
					owner->currentFuel = min (owner->unitDef->maxFuel, owner->currentFuel + (owner->unitDef->maxFuel / (GAME_SPEED * owner->unitDef->refuelTime)));

					if(owner->health>=owner->maxHealth-1 && owner->currentFuel >= owner->unitDef->maxFuel){
						airBaseHandler->LeaveLandingPad(reservedPad);
						reservedPad=0;
						padStatus=0;
						goalPos=oldGoalPos;
						SetState(AIRCRAFT_TAKEOFF);
					}
				}
			}

//.........这里部分代码省略.........

bool CHoverAirMoveType::Update()
{
	float3& pos = owner->pos;
	float3& speed = owner->speed;

	AAirMoveType::Update();

	if (owner->stunned || owner->beingBuilt) {
		wantedSpeed = ZeroVector;
		wantToStop = true;
	}

	// Allow us to stop if wanted
	if (wantToStop) {
		ExecuteStop();
	}

	const float3 lastSpeed = speed;

	if (owner->fpsControlPlayer != NULL) {
		SetState(AIRCRAFT_FLYING);

		const FPSUnitController& con = owner->fpsControlPlayer->fpsController;

		const float3 forward = con.viewDir;
		const float3 right = forward.cross(UpVector);
		const float3 nextPos = pos + speed;

		float3 flatForward = forward;
		flatForward.y = 0.0f;
		flatForward.Normalize();

		wantedSpeed = ZeroVector;

		if (con.forward) wantedSpeed += flatForward;
		if (con.back   ) wantedSpeed -= flatForward;
		if (con.right  ) wantedSpeed += right;
		if (con.left   ) wantedSpeed -= right;

		wantedSpeed.Normalize();
		wantedSpeed *= maxSpeed;

		if (!nextPos.IsInBounds()) {
			speed = ZeroVector;
		}

		UpdateAirPhysics();
		wantedHeading = GetHeadingFromVector(flatForward.x, flatForward.z);
	} else {
		if (reservedPad != NULL) {
			MoveToRepairPad();

			if (padStatus >= 1) {
				flyState = FLY_LANDING;
			}
		}

		// Main state handling
		switch (aircraftState) {
			case AIRCRAFT_LANDED:
				UpdateLanded();
				break;
			case AIRCRAFT_TAKEOFF:
				UpdateTakeoff();
				break;
			case AIRCRAFT_FLYING:
				UpdateFlying();
				break;
			case AIRCRAFT_LANDING:
				UpdateLanding();
				break;
			case AIRCRAFT_HOVERING:
				UpdateHovering();
				break;
			case AIRCRAFT_CRASHING:
				break;
		}
	}


	// Banking requires deltaSpeed.y = 0
	deltaSpeed = speed - lastSpeed;
	deltaSpeed.y = 0.0f;

	// Turn and bank and move; update dirs
	UpdateHeading();
	UpdateBanking(aircraftState == AIRCRAFT_HOVERING);

	return (HandleCollisions());
}