//https://www.reddit.com/r/Unity3D/comments/3xw8uc/cluster_homing_missiles_c_code/
private void UpdateRandomSwirlMethod(LaunchedMissileComp lmc)
{
if (lmc.projectileInfo.target != null)
{
if (lmc.TimeAlive > lmc.projectileInfo.DispersalTime + 1.5f)
{
if ((lmc.projectileInfo.target.position - lmc.transform.position).magnitude > 50)
{
lmc.randomSwirlOffset = 100.0f;
lmc.randomSwirlRotation = 90f;
}
else
{
lmc.randomSwirlOffset = 15f;
//if close to target
if ((lmc.projectileInfo.target.position - lmc.transform.position).magnitude < 10)
{
lmc.randomSwirlOffset = 0f;
lmc.randomSwirlRotation = 180f;
}
}
}
Vector3 direction = lmc.projectileInfo.target.position - lmc.transform.position + Random.insideUnitSphere * lmc.randomSwirlOffset;
direction.Normalize();
lmc.transform.rotation = Quaternion.RotateTowards(lmc.transform.rotation,
Quaternion.LookRotation(direction),
lmc.randomSwirlRotation * Time.deltaTime);
lmc.transform.position += lmc.transform.forward * Time.deltaTime * lmc.projectileInfo.FlightSpeed;
}
}
private void UpdateChaseMethod(LaunchedMissileComp lmc)
{
lmc.transform.rotation = Quaternion.Lerp(lmc.transform.rotation,
Quaternion.LookRotation(lmc.projectileInfo.target.position - lmc.transform.position),
Time.deltaTime * lmc.projectileInfo.RotationSpeed);
lmc.transform.position += lmc.transform.forward * Time.deltaTime * lmc.projectileInfo.FlightSpeed;
}
private static void CalculateDispersalTarget(LaunchedMissileComp lmc)
{
var randomX = Random.Range(-15, 15);
var randomY = Random.Range(-15, 15);
var zDistance = lmc.projectileInfo.DispersalTime * lmc.projectileInfo.FlightSpeed;
lmc.dispersalTarget = lmc.transform.position + new Vector3(randomX, randomY, zDistance);
}
private bool CheckPastTimeToLive(LaunchedMissileComp lmc)
{
if (lmc.TimeAlive > lmc.projectileInfo.TimeToLive)
{
RangedCombatHelper.PerformAreaExplosion(lmc);
return(true);
}
return(false);
}
private void HandleDetonationDistance(LaunchedMissileComp lmc)
{
if (lmc.detonationDistance.IsAlmost(0))
{
return;
}
if (lmc.projectileInfo.target != null && Vector3.SqrMagnitude(lmc.transform.position - lmc.projectileInfo.target.position) <= lmc.detonationDistance)
{
RangedCombatHelper.PerformAreaExplosion(lmc);
}
}
private void UpdatePIDMethod(LaunchedMissileComp lmc)
{
Vector3 hitPos = RangedCombatHelper.Predict(lmc.transform.position, lmc.projectileInfo.target.position, lmc.targetLastPos, lmc.projectileInfo.FlightSpeed);
lmc.targetLastPos = lmc.projectileInfo.target.position;
lmc.transform.rotation = Quaternion.Lerp(lmc.transform.rotation,
Quaternion.LookRotation(hitPos - lmc.transform.position),
Time.deltaTime * lmc.projectileInfo.RotationSpeed);
lmc.transform.position += lmc.transform.forward * Time.deltaTime * lmc.projectileInfo.FlightSpeed;
}
public void MissileUpdate(LaunchedMissileComp lmc)
{
lmc.TimeAlive += Time.deltaTime;
if (!CheckPastTimeToLive(lmc))
{
// Navigate
if (lmc.projectileInfo.missileFireType == MissileFireType.Dumbfire)
{
UpdateDumbfireMethod(lmc);
}
else if (lmc.projectileInfo.target != null)
{
if (lmc.projectileInfo.ShouldDisperse)
{
UpdateDispersalMethod(lmc);
}
else
{
switch (lmc.projectileInfo.missileHomingMethod)
{
case MissileHomingMethod.Chase:
UpdateChaseMethod(lmc);
break;
case MissileHomingMethod.PID:
UpdatePIDMethod(lmc);
break;
case MissileHomingMethod.AdvNav:
UpdateAdvancedNavMethod(lmc);
break;
case MissileHomingMethod.Cluster:
UpdateClusterMethod(lmc);
break;
case MissileHomingMethod.Swirl:
UpdateRandomSwirlMethod(lmc);
break;
default:
Debug.LogError("Missile homing method not found");
break;
}
}
}
HandleDetonationDistance(lmc);
}
}
private void UpdateDispersalMethod(LaunchedMissileComp lmc)
{
if (lmc.TimeAlive < lmc.projectileInfo.DispersalTime)
{
if (lmc.dispersalTarget == Vector3.zero)
{
CalculateDispersalTarget(lmc);
}
lmc.transform.rotation = Quaternion.Lerp(lmc.transform.rotation,
Quaternion.LookRotation(lmc.dispersalTarget - lmc.transform.position), // lmc.transform.up),
Time.deltaTime * lmc.projectileInfo.RotationSpeed);
lmc.transform.position += lmc.transform.forward * Time.deltaTime * lmc.projectileInfo.FlightSpeed;
}
else
{
lmc.projectileInfo.ShouldDisperse = false;
}
}
public static void PerformAreaExplosion(LaunchedMissileComp lmc)
{
if (lmc.projectileInfo.ExplosionImpactRadius > 0)
{
try
{
var mdc = lmc.Owner.AddComponent <MissileAreaDamageComp>(ComponentTypes.MissileAreaDamageComp);
mdc.AreaRadius = lmc.projectileInfo.ExplosionImpactRadius;
mdc.ExplosionCenter = lmc.GetComponent <PositionComp>().transform.position;
}
catch (Exception)
{
Debug.Log($"exception");
}
}
else //just self destruct
{
lmc.Owner.AddComponent(ComponentTypes.DamageComp);
}
}
private void UpdateAdvancedNavMethod(LaunchedMissileComp lmc)
{
lmc.previousLos = lmc.los;
lmc.los = lmc.projectileInfo.target.position - lmc.transform.position;
lmc.losDelta = lmc.los - lmc.previousLos;
lmc.losDelta = lmc.losDelta - Vector3.Project(lmc.losDelta, lmc.los);
if (lmc.UseAdvancedMode)
{
lmc.desiredRotation = (Time.deltaTime * lmc.los) + (lmc.losDelta * lmc.navigationalConstant) + (Time.deltaTime * lmc.desiredRotation * lmc.navigationalConstant * 0.5f); // Augmented version of proportional navigation.
}
else
{
lmc.desiredRotation = (Time.deltaTime * lmc.los) + (lmc.losDelta * lmc.navigationalConstant); // Plain proportional navigation.
}
lmc.transform.rotation = Quaternion.Lerp(lmc.transform.rotation,
Quaternion.LookRotation(lmc.desiredRotation),
Time.deltaTime * lmc.projectileInfo.RotationSpeed);
lmc.transform.position += lmc.transform.forward * Time.deltaTime * lmc.projectileInfo.FlightSpeed;
}
//http://answers.unity3d.com/questions/698009/swarm-missile-adding-random-movement-to-a-homing-m.html
private void UpdateClusterMethod(LaunchedMissileComp lmc)
{
//defines a new random float for x,y,z every frame only if the time specfied has elapsed. Creates random changes in x, y, z, variables at random times.
if (Time.time > lmc.timeRandom)
{
lmc.xRandom = Random.Range(-lmc.clusterRandomRange, lmc.clusterRandomRange);
lmc.yRandom = Random.Range(-lmc.clusterRandomRange, lmc.clusterRandomRange);
lmc.zRandom = Random.Range(0, lmc.clusterRandomRange);
lmc.timeRandom = Time.time + Random.Range(0.01f, 2);
}
//Perform swarming slide behavior
if ((lmc.projectileInfo.target.position - lmc.transform.position).magnitude > 10)
{
lmc.transform.Translate(lmc.xRandom, lmc.yRandom, lmc.zRandom, lmc.projectileInfo.target);
}
//keeps the missile looking at its target
lmc.transform.rotation = Quaternion.Slerp(lmc.transform.rotation,
Quaternion.LookRotation(lmc.projectileInfo.target.position - lmc.transform.position), // lmc.transform.up),
Time.deltaTime * lmc.projectileInfo.RotationSpeed);
lmc.transform.position += lmc.transform.forward * Time.deltaTime * lmc.projectileInfo.FlightSpeed;
}
private void UpdateDumbfireMethod(LaunchedMissileComp lmc)
{
lmc.transform.rotation = Quaternion.LookRotation(lmc.projectileInfo.fireDirection);
lmc.transform.position += lmc.transform.forward * Time.deltaTime * lmc.projectileInfo.FlightSpeed;
}
public void DeactivateBeforeRelease(LaunchedMissileComp lmc)
{
Physics.IgnoreCollision(lmc.myCollider, lmc.ownerCollider, false);
}
