/// <summary>
/// Triggers a new 3D sound.
/// </summary>
public Cue Play3DCue(string cueName, IAudioEmitter emitter)
{
if (FrameworkCore.gameState != GameState.Play || FrameworkCore.soundbank == null)
{
return(null);
}
Cue3D cue3D;
if (cuePool.Count > 0)
{
// If possible, reuse an existing Cue3D instance.
cue3D = cuePool.Pop();
}
else
{
// Otherwise we have to allocate a new one.
cue3D = new Cue3D();
}
// Fill in the cue and emitter fields.
try
{
cue3D.Cue = FrameworkCore.soundbank.GetCue(cueName);
}
catch
{
}
cue3D.Emitter = emitter;
// Set the 3D position of this cue, and then play it.
Apply3D(cue3D);
try
{
cue3D.Cue.Play();
}
catch
{
}
// Remember that this cue is now active.
activeCues.Add(cue3D);
return(cue3D.Cue);
}
//targeting brain.
public void Update(GameTime gameTime, List <Collideable> ships)
{
turretWeapon.Update(gameTime);
BeamDamageCheck(gameTime);
UpdateBeamSound();
if (updateTimer > 0)
{
updateTimer -= (int)gameTime.ElapsedGameTime.TotalMilliseconds;
if (lastSelectedShip != null && !lastSelectedShip.IsDestroyed)
{
UpdateRotation(gameTime, lastSelectedShip.Position);
}
else
{
ResetTurretOrientation();
}
return;
}
else
{
updateTimer = 300;
}
if (parentShip.targetShip != null && parentShip.targetShip.IsDestroyed)
{
//priority ship is dead. Clear this ship's priority target.
parentShip.SetTargetShip(null);
}
//if we can't fire, then reset all turrets to default orientations.
if (parentShip.OrderEffect != null && !parentShip.OrderEffect.canFire)
{
ResetTurretOrientation();
return;
}
//limit how often the think update happens, limit to the turret weapon's refire rate.
if (turretWeapon.lastFireTime > 0 && turretWeapon.firetype == Weapon.fireType.Projectile)
{
return;
}
SpaceShip targetShip = null;
float nearestDistance = float.MaxValue;
Vector3 finalPredictedPosition = Vector3.Zero;
Matrix orientation = Matrix.CreateFromQuaternion(parentShip.Rotation); //ship orientation
Matrix turretOrientation = Matrix.CreateFromQuaternion(rotateQuat); //turret orientation
//does the ship have a priority target? check if target is in firing arc.
if (parentShip.targetShip != null && !parentShip.targetShip.IsDestroyed)
{
Vector3 muzzleVec = GetMuzzleVec(0);
SpaceShip enemyShip = (SpaceShip)parentShip.targetShip;
Vector3 predictedPosition = GetPredictedPosition(gameTime, muzzleVec, enemyShip);
//now check if the predictedPosition is within the valid firing arc.
Vector3 aimFacing = GetOrientationMatrix(upAimVector, orientation);
float frontDot = Helpers.GetDot(muzzleVec, predictedPosition, aimFacing);
if (frontDot > 0)
{
targetShip = enemyShip;
finalPredictedPosition = predictedPosition;
}
}
//we do not have a priority target. so, let's evaluate every ship.
if (targetShip == null)
{
for (int i = 0; i < ships.Count; i++)
{
//only target spaceships.
if (!Helpers.IsSpaceship(ships[i]))
{
continue;
}
SpaceShip enemy = ships[i] as SpaceShip;
//don't target dead ships.
if (enemy.IsDestroyed)
{
continue;
}
//don't target owner.
if (enemy == parentShip)
{
continue;
}
//don't target friendlies.
if (enemy.owner == parentShip.owner)
{
continue;
}
//same faction. don't target this ship.
if (enemy.owner.factionName == parentShip.owner.factionName)
{
continue;
}
Vector3 aimFacing = GetOrientationMatrix(upAimVector, orientation);
float frontDot = Helpers.GetDot(this.position, enemy.Position, aimFacing);
if (frontDot < 0)
{
continue;
}
//ok, we now have a LIVE ENEMY ship that is in FRONT of us.
//Now get the predicted firing Vector IF the ship is moving.
// if the ship isn't moving, then we don't predict anything - we just directly target the ship.
SpaceShip enemyShip = (SpaceShip)enemy;
Vector3 muzzleVec = GetMuzzleVec(0); //for simplicity sake we only check the first muzzle barrel.
Vector3 predictedPosition = Vector3.Zero;
//if the weapon is not ready to be fired, don't bother calculating the predictedPosition
if (turretWeapon.CurBurstReloadTime <= 0 && turretWeapon.lastFireTime <= 0)
{
predictedPosition = GetPredictedPosition(gameTime, muzzleVec, enemyShip);
}
else
{
predictedPosition = enemy.Position;
}
//now check if the predictedPosition is within the valid firing arc.
frontDot = Helpers.GetDot(muzzleVec, predictedPosition, aimFacing);
if (frontDot < 0)
{
continue;
}
//keep track of the closest predictedPosition.
//enemy ship.
float distanceToEnemyShip = Vector3.Distance(predictedPosition, this.position);
if (distanceToEnemyShip < nearestDistance)
{
nearestDistance = distanceToEnemyShip;
targetShip = (SpaceShip)enemy;
finalPredictedPosition = predictedPosition;
}
}
}
if (targetShip == null)
{
//no valid target found.
//I have no target: so reset turret orientation to default aim position.
ResetTurretOrientation();
return;
}
//now fire the turret.
for (int i = 0; i < muzzleOffsets.Length; i++)
{
Vector3 muzzleVec = position;
muzzleVec +=
(turretOrientation.Right * muzzleOffsets[i].X) +
(turretOrientation.Up * muzzleOffsets[i].Y) +
(turretOrientation.Forward * -muzzleOffsets[i].Z);
if (turretWeapon.Fire(parentShip, finalPredictedPosition, muzzleVec))
{
IAudioEmitter audioEmit = new IAudioEmitter();
audioEmit.Position = this.position;
if (turretWeapon.firetype == Weapon.fireType.Projectile)
{
FrameworkCore.audiomanager.Play3DCue(sounds.Weapon.rifle, audioEmit);
}
PlayBeamSound();
//bolt was created. now create the muzzleflash.
parentShip.Particles.CreateMuzzleFlash(muzzleVec, (finalPredictedPosition - muzzleVec));
if (i >= muzzleOffsets.Length - 1)
{
//and reset the weapon's refire timer.
float fireRateModifier = 1f;
if (parentShip.OrderEffect != null)
{
if (parentShip.OrderEffect.fireRateModifier > 0)
{
fireRateModifier = parentShip.OrderEffect.fireRateModifier;
}
}
turretWeapon.lastFireTime = (int)(turretWeapon.refireTime / fireRateModifier);
//fire rate modifier controls time between shots.
turretWeapon.lastFireTime = Helpers.ApplyFireRateModifier(parentShip, turretWeapon.lastFireTime);
}
}
}
lastSelectedShip = targetShip;
//Handle turret rotation.
UpdateRotation(gameTime, finalPredictedPosition);
}