public static void DamageCharacters(Vector2 worldPosition, Attack attack, float force, Entity damageSource, Character attacker)
{
if (attack.Range <= 0.0f) { return; }
//long range for the broad distance check, because large characters may still be in range even if their collider isn't
float broadRange = Math.Max(attack.Range * 10.0f, 10000.0f);
foreach (Character c in Character.CharacterList)
{
if (!c.Enabled ||
Math.Abs(c.WorldPosition.X - worldPosition.X) > broadRange ||
Math.Abs(c.WorldPosition.Y - worldPosition.Y) > broadRange)
{
continue;
}
Vector2 explosionPos = worldPosition;
if (c.Submarine != null) { explosionPos -= c.Submarine.Position; }
Hull hull = Hull.FindHull(explosionPos, null, false);
bool underWater = hull == null || explosionPos.Y < hull.Surface;
explosionPos = ConvertUnits.ToSimUnits(explosionPos);
Dictionary<Limb, float> distFactors = new Dictionary<Limb, float>();
Dictionary<Limb, float> damages = new Dictionary<Limb, float>();
List<Affliction> modifiedAfflictions = new List<Affliction>();
foreach (Limb limb in c.AnimController.Limbs)
{
if (limb.IsSevered || limb.IgnoreCollisions || !limb.body.Enabled) { continue; }
float dist = Vector2.Distance(limb.WorldPosition, worldPosition);
//calculate distance from the "outer surface" of the physics body
//doesn't take the rotation of the limb into account, but should be accurate enough for this purpose
float limbRadius = limb.body.GetMaxExtent();
dist = Math.Max(0.0f, dist - ConvertUnits.ToDisplayUnits(limbRadius));
if (dist > attack.Range) { continue; }
float distFactor = 1.0f - dist / attack.Range;
//solid obstacles between the explosion and the limb reduce the effect of the explosion
distFactor *= GetObstacleDamageMultiplier(explosionPos, worldPosition, limb.SimPosition);
distFactors.Add(limb, distFactor);
modifiedAfflictions.Clear();
foreach (Affliction affliction in attack.Afflictions.Keys)
{
//previously the damage would be divided by the number of limbs (the intention was to prevent characters with more limbs taking more damage from explosions)
//that didn't work well on large characters like molochs and endworms: the explosions tend to only damage one or two of their limbs, and since the characters
//have lots of limbs, they tended to only take a fraction of the damage they should
//now we just divide by 10, which keeps the damage to normal-sized characters roughly the same as before and fixes the large characters
modifiedAfflictions.Add(affliction.CreateMultiplied(distFactor / 10));
}
c.LastDamageSource = damageSource;
if (attacker == null)
{
if (damageSource is Item item)
{
attacker = item.GetComponent<Projectile>()?.User;
if (attacker == null)
{
attacker = item.GetComponent<MeleeWeapon>()?.User;
}
}
}
//use a position slightly from the limb's position towards the explosion
//ensures that the attack hits the correct limb and that the direction of the hit can be determined correctly in the AddDamage methods
Vector2 dir = worldPosition - limb.WorldPosition;
Vector2 hitPos = limb.WorldPosition + (dir.LengthSquared() <= 0.001f ? Rand.Vector(1.0f) : Vector2.Normalize(dir)) * 0.01f;
AttackResult attackResult = c.AddDamage(hitPos, modifiedAfflictions, attack.Stun * distFactor, false, attacker: attacker);
damages.Add(limb, attackResult.Damage);
if (attack.StatusEffects != null && attack.StatusEffects.Any())
{
attack.SetUser(attacker);
var statusEffectTargets = new List<ISerializableEntity>() { c, limb };
foreach (StatusEffect statusEffect in attack.StatusEffects)
{
statusEffect.Apply(ActionType.OnUse, 1.0f, damageSource, statusEffectTargets);
statusEffect.Apply(ActionType.Always, 1.0f, damageSource, statusEffectTargets);
statusEffect.Apply(underWater ? ActionType.InWater : ActionType.NotInWater, 1.0f, damageSource, statusEffectTargets);
}
}
if (limb.WorldPosition != worldPosition && !MathUtils.NearlyEqual(force, 0.0f))
{
Vector2 limbDiff = Vector2.Normalize(limb.WorldPosition - worldPosition);
if (!MathUtils.IsValid(limbDiff)) { limbDiff = Rand.Vector(1.0f); }
Vector2 impulse = limbDiff * distFactor * force;
Vector2 impulsePoint = limb.SimPosition - limbDiff * limbRadius;
limb.body.ApplyLinearImpulse(impulse, impulsePoint, maxVelocity: NetConfig.MaxPhysicsBodyVelocity * 0.2f);
}
}
if (c == Character.Controlled && !c.IsDead)
{
Limb head = c.AnimController.GetLimb(LimbType.Head);
if (damages.TryGetValue(head, out float headDamage) && headDamage > 0.0f && distFactors.TryGetValue(head, out float headFactor))
{
PlayTinnitusProjSpecific(headFactor);
}
}
//sever joints
if (attack.SeverLimbsProbability > 0.0f)
{
foreach (Limb limb in c.AnimController.Limbs)
{
if (limb.character.Removed || limb.Removed) { continue; }
if (limb.IsSevered) { continue; }
if (!c.IsDead && !limb.CanBeSeveredAlive) { continue; }
if (distFactors.TryGetValue(limb, out float distFactor))
{
if (damages.TryGetValue(limb, out float damage))
{
c.TrySeverLimbJoints(limb, attack.SeverLimbsProbability * distFactor, damage, allowBeheading: true);
}
}
}
}
}
}
public void Explode(Vector2 worldPosition, Entity damageSource, Character attacker = null)
{
prevExplosions.Add(new Triplet<Explosion, Vector2, float>(this, worldPosition, (float)Timing.TotalTime));
if (prevExplosions.Count > 100)
{
prevExplosions.RemoveAt(0);
}
Hull hull = Hull.FindHull(worldPosition);
ExplodeProjSpecific(worldPosition, hull);
if (hull != null && !string.IsNullOrWhiteSpace(decal) && decalSize > 0.0f)
{
hull.AddDecal(decal, worldPosition, decalSize, isNetworkEvent: false);
}
float displayRange = attack.Range;
Vector2 cameraPos = Character.Controlled != null ? Character.Controlled.WorldPosition : GameMain.GameScreen.Cam.Position;
float cameraDist = Vector2.Distance(cameraPos, worldPosition) / 2.0f;
GameMain.GameScreen.Cam.Shake = cameraShake * Math.Max((cameraShakeRange - cameraDist) / cameraShakeRange, 0.0f);
#if CLIENT
if (screenColor != Color.Transparent)
{
Color flashColor = Color.Lerp(Color.Transparent, screenColor, Math.Max((screenColorRange - cameraDist) / screenColorRange, 0.0f));
Screen.Selected.ColorFade(flashColor, Color.Transparent, screenColorDuration);
}
#endif
if (displayRange < 0.1f) { return; }
if (attack.GetStructureDamage(1.0f) > 0.0f)
{
RangedStructureDamage(worldPosition, displayRange, attack.GetStructureDamage(1.0f), attack.GetLevelWallDamage(1.0f), attacker);
}
if (BallastFloraDamage > 0.0f)
{
RangedBallastFloraDamage(worldPosition, displayRange, BallastFloraDamage, attacker);
}
if (EmpStrength > 0.0f)
{
float displayRangeSqr = displayRange * displayRange;
foreach (Item item in Item.ItemList)
{
float distSqr = Vector2.DistanceSquared(item.WorldPosition, worldPosition);
if (distSqr > displayRangeSqr) continue;
float distFactor = 1.0f - (float)Math.Sqrt(distSqr) / displayRange;
//damage repairable power-consuming items
var powered = item.GetComponent<Powered>();
if (powered == null || !powered.VulnerableToEMP) continue;
if (item.Repairables.Any())
{
item.Condition -= item.MaxCondition * EmpStrength * distFactor;
}
//discharge batteries
var powerContainer = item.GetComponent<PowerContainer>();
if (powerContainer != null)
{
powerContainer.Charge -= powerContainer.Capacity * EmpStrength * distFactor;
}
}
}
if (MathUtils.NearlyEqual(force, 0.0f) && MathUtils.NearlyEqual(attack.Stun, 0.0f) && MathUtils.NearlyEqual(attack.GetTotalDamage(false), 0.0f))
{
return;
}
DamageCharacters(worldPosition, attack, force, damageSource, attacker);
if (GameMain.NetworkMember == null || !GameMain.NetworkMember.IsClient)
{
foreach (Item item in Item.ItemList)
{
if (item.Condition <= 0.0f) { continue; }
float dist = Vector2.Distance(item.WorldPosition, worldPosition);
float itemRadius = item.body == null ? 0.0f : item.body.GetMaxExtent();
dist = Math.Max(0.0f, dist - ConvertUnits.ToDisplayUnits(itemRadius));
if (dist > attack.Range) { continue; }
if (dist < attack.Range * 0.5f && applyFireEffects && !item.FireProof)
{
//don't apply OnFire effects if the item is inside a fireproof container
//(or if it's inside a container that's inside a fireproof container, etc)
Item container = item.Container;
bool fireProof = false;
while (container != null)
{
if (container.FireProof)
{
fireProof = true;
break;
}
container = container.Container;
}
if (!fireProof)
{
item.ApplyStatusEffects(ActionType.OnFire, 1.0f);
if (item.Condition <= 0.0f && GameMain.NetworkMember != null && GameMain.NetworkMember.IsServer)
{
GameMain.NetworkMember.CreateEntityEvent(item, new object[] { NetEntityEvent.Type.ApplyStatusEffect, ActionType.OnFire });
}
}
}
if (item.Prefab.DamagedByExplosions && !item.Indestructible)
{
float distFactor = 1.0f - dist / attack.Range;
float damageAmount = attack.GetItemDamage(1.0f) * item.Prefab.ExplosionDamageMultiplier;
Vector2 explosionPos = worldPosition;
if (item.Submarine != null) { explosionPos -= item.Submarine.Position; }
damageAmount *= GetObstacleDamageMultiplier(ConvertUnits.ToSimUnits(explosionPos), worldPosition, item.SimPosition);
item.Condition -= damageAmount * distFactor;
}
}
}
}
