Code(feat) fighter ai

data/gegno/gegno intro missions.txt

@@ -60,7 +60,7 @@ mission "First Contact: Gegno Vi"
 					goto watch
 				`	(Try to help the alien defeat the beast.)`
 			label help
-			`	You aim your sidearm at the beast, preparing to fire. Instead of digging back under the surface, the beast continues to thrash about where it is while the alien batters it down with their spear weapon. Making sure you don't accidentally hit them, you hold your breath and wait until the right moment comes, aiming for the creature's head. The flailing creature begins to gets closer, and your pulse begins to race. A gust of sand blasts directly towards you, and once it clears you fire your weapon. A laser shot flies directly into the face of the beast.`
+			`	You aim your sidearm at the beast, preparing to fire. Instead of digging back under the surface, the beast continues to thrash about where it is while the alien batters it down with their spear weapon. Making sure you don't accidentally hit them, you hold your breath and wait until the right moment comes, aiming for the creature's head. The flailing creature begins to get closer, and your pulse begins to race. A gust of sand blasts directly towards you, and once it clears you fire your weapon. A laser shot flies directly into the face of the beast.`
 			`	Much to your dismay, the shot almost immediately ricochets off of it. You watch as the massive monster tumbles over you, just barely leaping into the air above. The monster plunges into the earth behind you, and you fall to your back with the wind knocked out of you. You raise your sidearm once more. The creature explodes out of the ground with its gaping mouth pointed upward to the sky. With shaking hands, you take aim once again and pull the trigger.`
 			`	A loud, cannon-like bang follows, but it most certainly did not come from your weapon. The beast before you falls downward in a cloud of black smoke, blasting sand and rubble everywhere with a thud. Once you come to your senses, you see the alien marching out of the creature's mouth.`
 			choice
@@ -283,7 +283,7 @@ mission "Giaru Gegno: Quarg Contact"
 			label "has met gegno"
 			action
 				set "gegno: met gegno before quarg"
-			`The visual of a complete Quarg Ringworld is drastically different than the Gegno homeworld you were on before. Such a pristine, advanced structure is quite the opposite of the disorderly industry of Gegno civilisation. The population of Quarg here must be at least around the trillions, many times more than the population of the Gegno homeworld. What's even more interesting is there are other aliens of the kind you met before here on the ring too. The Quarg must have some kind of relations with them, perhaps through trade, maintenance, or other services. Despite them being present, the Quarg seem to be very dismissive of them. However, a few of the aliens occasionally glance over at you with hints of interest.`
+			`The visual of a complete Quarg Ringworld is drastically different than the Gegno homeworld you were on before. Such a pristine, advanced structure is quite the opposite of the disorderly industry of Gegno civilization. The population of Quarg here must be at least around the trillions, many times more than the population of the Gegno homeworld. What's even more interesting is there are other aliens of the kind you met before here on the ring too. The Quarg must have some kind of relations with them, perhaps through trade, maintenance, or other services. Despite them being present, the Quarg seem to be very dismissive of them. However, a few of the aliens occasionally glance over at you with hints of interest.`
 			`	Soon enough, a few Quarg start to rush towards you much faster than the others and begin a conversation between themselves. You aren't sure what language they are speaking, but judging by the tones and pronunciations, it sounds similar to the one you've heard the aliens speaking before. After a moment or so, one of them motions you to follow them.`
 
 			label "walking"

source/AI.cpp

@@ -2046,6 +2046,39 @@ bool AI::MoveTo(Ship &ship, Command &command, const Point &targetPosition,
 
 
 
+bool AI::MoveThrough(Ship &ship, Command &command, const Point &targetPosition,
+	const Point &targetVelocity, double radius, double slow)
+{
+	const Point &position = ship.Position();
+	const Point &velocity = ship.Velocity();
+	const Angle &angle = ship.Facing();
+	Point dp = targetPosition - position;
+	Point dv = targetVelocity - velocity;
+
+	double speed = dv.Length();
+
+	bool isClose = (dp.Length() < radius);
+	if(isClose && speed < slow)
+		return true;
+
+	bool shouldReverse = false;
+	// dp = targetPosition - StoppingPoint(ship, targetVelocity, shouldReverse);
+	bool isFacing = (dp.Unit().Dot(angle.Unit()) > .95);
+	if(!isClose || (!isFacing && !shouldReverse))
+		command.SetTurn(TurnToward(ship, dp));
+	if(isFacing)
+		command.SetThrust(1.);
+	else if(shouldReverse)
+	{
+		command.SetTurn(TurnToward(ship, velocity));
+		command.SetThrust(-1.);
+	}
+
+	return false;
+}
+
+
+
 bool AI::Stop(Ship &ship, Command &command, double maxSpeed, const Point direction)
 {
 	const Point &velocity = ship.Velocity();
@@ -2113,6 +2146,180 @@ bool AI::Stop(Ship &ship, Command &command, double maxSpeed, const Point directi
 
 
 
+void AI::StrikeThrough(Ship& ship, Command& command, const Ship& target)
+{
+	int targetTurretRange = target.GetAICache().TurretRange();
+	int weaponsRange = 864; // need to calculate turn around distance v attacker gun range.
+	Point direction = ship.Position() - target.Position();
+	double length = direction.Length();
+
+	Point northUnit = target.Facing().Unit();
+	Point westUnit(northUnit.Y(), -northUnit.X());
+	Point eastUnit(-northUnit.Y(), northUnit.X());
+
+	// Point east = (target.Position() + eastUnit * targetTurretRange);
+	// Point west = (target.Position() + westUnit * targetTurretRange);
+
+	// Point frontAvoid = (direction.Unit().Cross(target.Facing().Unit()) < 0. ? west : east);
+	// Point velocity = ship.Velocity();
+	bool inFront = direction.Unit().Dot(target.Facing().Unit()) > .9;
+	bool isFacing = direction.Unit().Dot(ship.Facing().Unit()) < 0;
+	bool outerRadius = direction.Length() < targetTurretRange * 1.2; // should be max target gun & turget turret range
+	// double speed = ship.MaxVelocity();
+
+	if(outerRadius)
+	{
+		// if(inFront && isFacing)
+			// {
+			// MoveThrough(ship, command, frontAvoid, target.Velocity(), 20., speed);
+			// if(command.Has(Command::FORWARD) && ShouldUseAfterburner(ship))
+			// command |= Command::AFTERBURNER;
+		// }
+		// else if(inFront)
+		// {
+			// command |= Command::FORWARD;
+		// }
+
+		if(inFront && isFacing)
+		{
+			command.SetTurn(TurnToward(ship, TargetAim(ship, target)));
+			command.SetLateralThrust(-1);
+			command.SetThrust(1.);
+		}
+		else if(length >= weaponsRange)
+		{
+			command.SetTurn(TurnToward(ship, TargetAim(ship, target)));
+			command.SetThrust(1.);
+		}
+		else if(length < weaponsRange && ship.Facing().Unit().Dot(ship.Velocity().Unit()) > .7)
+		{
+			command.SetTurn(TurnToward(ship, TargetAim(ship, target)));
+			command.SetThrust(1.);
+		}
+		else if(length < weaponsRange && ship.Facing().Unit().Dot(ship.Velocity().Unit()) < .7)
+		{
+			command.SetTurn(TurnToward(ship, TargetAim(ship, target)));
+		}
+		else if(length < weaponsRange)
+		{
+			command.SetThrust(1.);
+		}
+	}
+	else
+	{
+		command.SetTurn(TurnToward(ship, TargetAim(ship, target)));
+		command.SetThrust(1.);
+	}
+}
+
+
+
+void AI::AttackRear(Ship& ship, Command& command, const Ship& target)
+{
+	int weaponsRange = 370; // attacker weapon range this will be passed in eventually
+	int targetTurretRange = target.GetAICache().TurretRange();
+	Point offset = target.Position() - target.Facing().Unit() * weaponsRange;
+	Point direction = ship.Position() - target.Position();
+	Point d = (target.Position() + target.Velocity()) - (ship.Position() + ship.Velocity());
+
+	Point northUnit = target.Facing().Unit();
+	Point southUnit = -target.Facing().Unit();
+	Point westUnit(northUnit.Y(), -northUnit.X());
+	Point eastUnit(-northUnit.Y(), northUnit.X());
+
+	Point northWestUnit(northUnit.X() + westUnit.X(), northUnit.Y() + westUnit.Y());
+	Point northWest = (target.Position() + northWestUnit * targetTurretRange / 1.41);
+
+	Point northEastUnit(northUnit.X() + eastUnit.X(), northUnit.Y() + eastUnit.Y());
+	Point northEast = (target.Position() + northEastUnit * targetTurretRange / 1.41);
+
+	Point southWestUnit(southUnit.X() + westUnit.X(), southUnit.Y() + westUnit.Y());
+	Point southWest = (target.Position() + southWestUnit * targetTurretRange / 1.41);
+
+	Point southEastUnit(southUnit.X() + eastUnit.X(), southUnit.Y() + eastUnit.Y());
+	Point southEast = (target.Position() + southEastUnit * targetTurretRange / 1.41);
+
+	Point frontAvoid = (direction.Cross(ship.Facing().Unit()) < 0. ? northWest : northEast);
+	Point rearAvoid = (direction.Cross(target.Facing().Unit()) > 0. ? southWest : southEast);
+
+	bool isBehind = direction.Unit().Dot(target.Facing().Unit()) < -.90;
+	bool justLeft = direction.Unit().Dot(target.Facing().Unit()) < -.8 && direction.Cross(target.Facing().Unit()) > 0;
+	bool justRight = direction.Unit().Dot(target.Facing().Unit()) < -.8 && direction.Cross(target.Facing().Unit()) <= 0;
+	bool inFront = direction.Unit().Dot(target.Facing().Unit()) > .75;
+
+	bool atSide = (!inFront && !isBehind);
+	bool inRange = direction.Length() < weaponsRange;
+	bool tooClose = direction.Length() < weaponsRange * .9;
+	bool outerRadius = direction.Length() < weaponsRange * 2;
+	double reverseSpeed = ship.MaxReverseVelocity();
+	double speed = ship.MaxVelocity();
+
+
+	if (outerRadius)
+	{
+		if (!isBehind) // not behind the target
+		{
+			command.SetTurn(TurnToward(ship, TargetAim(ship, target))-0.2);
+			command.SetLateralThrust(TurnToward(ship, TargetAim(ship, target)));
+			if(!inRange) command.SetThrust(1.);
+			ship.SetSwizzle(27);
+		}
+		/*if (inFront)
+		{
+			MoveThrough(ship, command, frontAvoid, target.Velocity(), 20., speed);
+			ship.SetSwizzle(27);
+		}
+		else if(atSide)
+		{
+			MoveThrough(ship, command, rearAvoid, target.Velocity(), 20., speed);
+			ship.SetSwizzle(0);
+		}
+		else if(!isBehind) // not behind target
+		{
+			MoveTo(ship, command, offset, target.Velocity(), 80., 20);
+			ship.SetSwizzle(8);
+		}
+		else if(!inRange) // behind but too far away
+		{
+			command.SetTurn(TurnToward(ship, TargetAim(ship, target)));
+			command.SetThrust(1.);
+			ship.SetSwizzle(5);
+		}*/
+		else if(tooClose) // behind target but too close
+		{
+			if(reverseSpeed && target.Velocity().Dot(-d.Unit()) <= reverseSpeed)
+			{
+				command.SetTurn(TurnToward(ship, d)-0.2);
+				command.SetLateralThrust(-1.);
+				if(ship.Facing().Unit().Dot(d) >= 0.)
+					command.SetThrust(-1.);
+			}
+			else
+			{
+				command.SetTurn(TurnToward(ship, d) - 0.2);
+				command.SetLateralThrust(-1.);
+			}
+			ship.SetSwizzle(14);
+		}
+		else if(inRange) // behind target, in sweet spot.
+		{
+			// if(justRight) command.SetLateralThrust(-1.);
+			// else if(justLeft) command.SetLateralThrust(1.);
+			command.SetLateralThrust(-1.);
+			command.SetTurn(TurnToward(ship, TargetAim(ship, target)));
+			ship.SetSwizzle(3);
+		}
+	}
+	else
+	{
+		command.SetTurn(TurnToward(ship, TargetAim(ship, target)));
+		command.SetThrust(1.);
+		ship.SetSwizzle(26);
+	}
+}
+
+
+
 void AI::PrepareForHyperspace(Ship &ship, Command &command)
 {
 	bool hasHyperdrive = ship.JumpNavigation().HasHyperdrive();
@@ -2316,7 +2523,10 @@ void AI::Attack(Ship &ship, Command &command, const Ship &target)
 		MoveToAttack(ship, command, target);
 		return;
 	}
-
+	if(target.TrueTurnRate() < ship.Acceleration() * 1.2)
+	{
+		AttackRear(ship, command, target);
+	}
 	// Check if this ship is fast enough to keep distance from target.
 	// Have a 10% minimum to avoid ships getting in a chase loop.
 	const bool isAbleToRun = target.MaxVelocity() * SAFETY_MULTIPLIER < ship.MaxVelocity();
@@ -2376,6 +2586,9 @@ void AI::Attack(Ship &ship, Command &command, const Ship &target)
 		}
 	}
 	// Fire if we can or move closer to use all weapons.
+	if(target.TrueTurnRate() < ship.Acceleration() * 1.2) AttackRear(ship, command, target);
+	else if(ship.Attributes().Get("rear")) StrikeThrough(ship, command, target);
+	else if(ship.Attributes().Get("strike")) StrikeThrough(ship, command, target);
 	else
 		if(weaponDistanceFromTarget < shortestRange * .75)
 			AimToAttack(ship, command, target);

source/AI.h

@@ -108,9 +108,13 @@ template <class Type>
 	static bool MoveToPlanet(Ship &ship, Command &command);
 	static bool MoveTo(Ship &ship, Command &command, const Point &targetPosition,
 		const Point &targetVelocity, double radius, double slow);
+	static bool MoveThrough(Ship &ship, Command &command, const Point &targetPosition,
+		const Point &targetVelocity, double radius, double slow);
 	static bool Stop(Ship &ship, Command &command, double maxSpeed = 0., const Point direction = Point());
 	static void PrepareForHyperspace(Ship &ship, Command &command);
 	static void CircleAround(Ship &ship, Command &command, const Body &target);
+	static void StrikeThrough(Ship &ship, Command &command, const Ship &target);
+	static void AttackRear(Ship &ship, Command &command, const Ship &target);
 	static void Swarm(Ship &ship, Command &command, const Body &target);
 	static void KeepStation(Ship &ship, Command &command, const Body &target);
 	static void Attack(Ship &ship, Command &command, const Ship &target);