Joonas Rikkonen
348 lines
16 KiB
C#
348 lines
16 KiB
C#
using Barotrauma.Items.Components;
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using Barotrauma.Networking;
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using FarseerPhysics;
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using Microsoft.Xna.Framework;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Xml.Linq;
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namespace Barotrauma
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{
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partial class Explosion
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{
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private static readonly List<Triplet<Explosion, Vector2, float>> prevExplosions = new List<Triplet<Explosion, Vector2, float>>();
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private readonly Attack attack;
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private readonly float force;
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private readonly float cameraShake, cameraShakeRange;
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private readonly Color screenColor;
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private readonly float screenColorRange, screenColorDuration;
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private bool sparks, shockwave, flames, smoke, flash, underwaterBubble;
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private float flashDuration;
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private float? flashRange;
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private readonly string decal;
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private readonly float decalSize;
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public float EmpStrength { get; set; }
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public Explosion(float range, float force, float damage, float structureDamage, float itemDamage, float empStrength = 0.0f)
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{
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attack = new Attack(damage, 0.0f, 0.0f, structureDamage, itemDamage, range)
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{
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SeverLimbsProbability = 1.0f
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};
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this.force = force;
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this.EmpStrength = empStrength;
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sparks = true;
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shockwave = true;
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smoke = true;
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flames = true;
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underwaterBubble = true;
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}
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public Explosion(XElement element, string parentDebugName)
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{
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attack = new Attack(element, parentDebugName + ", Explosion");
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force = element.GetAttributeFloat("force", 0.0f);
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sparks = element.GetAttributeBool("sparks", true);
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shockwave = element.GetAttributeBool("shockwave", true);
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flames = element.GetAttributeBool("flames", true);
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underwaterBubble = element.GetAttributeBool("underwaterbubble", true);
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smoke = element.GetAttributeBool("smoke", true);
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flash = element.GetAttributeBool("flash", true);
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flashDuration = element.GetAttributeFloat("flashduration", 0.05f);
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if (element.Attribute("flashrange") != null) { flashRange = element.GetAttributeFloat("flashrange", 100.0f); }
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EmpStrength = element.GetAttributeFloat("empstrength", 0.0f);
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decal = element.GetAttributeString("decal", "");
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decalSize = element.GetAttributeFloat("decalSize", 1.0f);
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cameraShake = element.GetAttributeFloat("camerashake", attack.Range * 0.1f);
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cameraShakeRange = element.GetAttributeFloat("camerashakerange", attack.Range);
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screenColorRange = element.GetAttributeFloat("screencolorrange", attack.Range * 0.1f);
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screenColor = element.GetAttributeColor("screencolor", Color.Transparent);
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screenColorDuration = element.GetAttributeFloat("screencolorduration", 0.1f);
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}
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public void DisableParticles()
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{
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sparks = false;
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shockwave = false;
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smoke = false;
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flash = false;
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flames = false;
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underwaterBubble = false;
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}
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public List<Triplet<Explosion, Vector2, float>> GetRecentExplosions(float maxSecondsAgo)
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{
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return prevExplosions.FindAll(e => e.Third >= Timing.TotalTime - maxSecondsAgo);
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}
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public void Explode(Vector2 worldPosition, Entity damageSource, Character attacker = null)
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{
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prevExplosions.Add(new Triplet<Explosion, Vector2, float>(this, worldPosition, (float)Timing.TotalTime));
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if (prevExplosions.Count > 100)
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{
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prevExplosions.RemoveAt(0);
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}
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Hull hull = Hull.FindHull(worldPosition);
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ExplodeProjSpecific(worldPosition, hull);
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float displayRange = attack.Range;
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Vector2 cameraPos = Character.Controlled != null ? Character.Controlled.WorldPosition : GameMain.GameScreen.Cam.Position;
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float cameraDist = Vector2.Distance(cameraPos, worldPosition) / 2.0f;
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GameMain.GameScreen.Cam.Shake = cameraShake * Math.Max((cameraShakeRange - cameraDist) / cameraShakeRange, 0.0f);
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#if CLIENT
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if (screenColor != Color.Transparent)
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{
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Color flashColor = Color.Lerp(Color.Transparent, screenColor, Math.Max((screenColorRange - cameraDist) / screenColorRange, 0.0f));
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Screen.Selected.ColorFade(flashColor, Color.Transparent, screenColorDuration);
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}
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#endif
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if (displayRange < 0.1f) { return; }
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if (attack.GetStructureDamage(1.0f) > 0.0f)
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{
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RangedStructureDamage(worldPosition, displayRange, attack.GetStructureDamage(1.0f), attacker);
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}
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if (EmpStrength > 0.0f)
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{
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float displayRangeSqr = displayRange * displayRange;
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foreach (Item item in Item.ItemList)
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{
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float distSqr = Vector2.DistanceSquared(item.WorldPosition, worldPosition);
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if (distSqr > displayRangeSqr) continue;
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float distFactor = 1.0f - (float)Math.Sqrt(distSqr) / displayRange;
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//damage repairable power-consuming items
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var powered = item.GetComponent<Powered>();
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if (powered == null || !powered.VulnerableToEMP) continue;
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if (item.Repairables.Any())
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{
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item.Condition -= 100 * EmpStrength * distFactor;
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}
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//discharge batteries
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var powerContainer = item.GetComponent<PowerContainer>();
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if (powerContainer != null)
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{
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powerContainer.Charge -= powerContainer.Capacity * EmpStrength * distFactor;
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}
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}
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}
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if (MathUtils.NearlyEqual(force, 0.0f) && MathUtils.NearlyEqual(attack.Stun, 0.0f) && MathUtils.NearlyEqual(attack.GetTotalDamage(false), 0.0f))
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{
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return;
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}
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DamageCharacters(worldPosition, attack, force, damageSource, attacker);
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if (GameMain.NetworkMember == null || !GameMain.NetworkMember.IsClient)
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{
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if (flames)
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{
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foreach (Item item in Item.ItemList)
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{
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if (item.CurrentHull != hull || item.FireProof || item.Condition <= 0.0f) { continue; }
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//don't apply OnFire effects if the item is inside a fireproof container
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//(or if it's inside a container that's inside a fireproof container, etc)
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Item container = item.Container;
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bool fireProof = false;
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while (container != null)
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{
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if (container.FireProof) { fireProof = true; break; }
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container = container.Container;
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}
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if (fireProof || Vector2.Distance(item.WorldPosition, worldPosition) > attack.Range * 0.5f) { continue; }
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item.ApplyStatusEffects(ActionType.OnFire, 1.0f);
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if (item.Condition <= 0.0f && GameMain.NetworkMember != null && GameMain.NetworkMember.IsServer)
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{
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GameMain.NetworkMember.CreateEntityEvent(item, new object[] { NetEntityEvent.Type.ApplyStatusEffect, ActionType.OnFire });
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}
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if (item.Prefab.DamagedByExplosions && !item.Indestructible)
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{
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float limbRadius = item.body == null ? 0.0f : item.body.GetMaxExtent();
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float dist = Vector2.Distance(item.WorldPosition, worldPosition);
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dist = Math.Max(0.0f, dist - ConvertUnits.ToDisplayUnits(limbRadius));
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if (dist > attack.Range) { continue; }
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float distFactor = 1.0f - dist / attack.Range;
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float damageAmount = attack.GetItemDamage(1.0f);
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item.Condition -= damageAmount * distFactor;
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}
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}
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}
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}
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}
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partial void ExplodeProjSpecific(Vector2 worldPosition, Hull hull);
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public static void DamageCharacters(Vector2 worldPosition, Attack attack, float force, Entity damageSource, Character attacker)
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{
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if (attack.Range <= 0.0f) return;
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//long range for the broad distance check, because large characters may still be in range even if their collider isn't
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float broadRange = Math.Max(attack.Range * 10.0f, 10000.0f);
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foreach (Character c in Character.CharacterList)
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{
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if (!c.Enabled ||
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Math.Abs(c.WorldPosition.X - worldPosition.X) > broadRange ||
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Math.Abs(c.WorldPosition.Y - worldPosition.Y) > broadRange)
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{
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continue;
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}
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Vector2 explosionPos = worldPosition;
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if (c.Submarine != null) { explosionPos -= c.Submarine.Position; }
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Hull hull = Hull.FindHull(explosionPos, null, false);
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bool underWater = hull == null || explosionPos.Y < hull.Surface;
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explosionPos = ConvertUnits.ToSimUnits(explosionPos);
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Dictionary<Limb, float> distFactors = new Dictionary<Limb, float>();
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foreach (Limb limb in c.AnimController.Limbs)
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{
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float dist = Vector2.Distance(limb.WorldPosition, worldPosition);
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//calculate distance from the "outer surface" of the physics body
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//doesn't take the rotation of the limb into account, but should be accurate enough for this purpose
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float limbRadius = Math.Max(Math.Max(limb.body.width * 0.5f, limb.body.height * 0.5f), limb.body.radius);
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dist = Math.Max(0.0f, dist - ConvertUnits.ToDisplayUnits(limbRadius));
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if (dist > attack.Range) { continue; }
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float distFactor = 1.0f - dist / attack.Range;
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//solid obstacles between the explosion and the limb reduce the effect of the explosion by 90%
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if (Submarine.CheckVisibility(limb.SimPosition, explosionPos) != null) distFactor *= 0.1f;
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distFactors.Add(limb, distFactor);
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List<Affliction> modifiedAfflictions = new List<Affliction>();
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foreach (Affliction affliction in attack.Afflictions.Keys)
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{
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modifiedAfflictions.Add(affliction.CreateMultiplied(distFactor / c.AnimController.Limbs.Length));
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}
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c.LastDamageSource = damageSource;
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if (attacker == null)
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{
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if (damageSource is Item item)
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{
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attacker = item.GetComponent<Projectile>()?.User;
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if (attacker == null) attacker = item.GetComponent<MeleeWeapon>()?.User;
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}
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}
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//use a position slightly from the limb's position towards the explosion
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//ensures that the attack hits the correct limb and that the direction of the hit can be determined correctly in the AddDamage methods
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Vector2 hitPos = limb.WorldPosition + (worldPosition - limb.WorldPosition) / dist * 0.01f;
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c.AddDamage(hitPos, modifiedAfflictions, attack.Stun * distFactor, false, attacker: attacker);
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if (attack.StatusEffects != null && attack.StatusEffects.Any())
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{
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attack.SetUser(attacker);
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var statusEffectTargets = new List<ISerializableEntity>() { c, limb };
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foreach (StatusEffect statusEffect in attack.StatusEffects)
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{
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statusEffect.Apply(ActionType.OnUse, 1.0f, damageSource, statusEffectTargets);
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statusEffect.Apply(ActionType.Always, 1.0f, damageSource, statusEffectTargets);
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statusEffect.Apply(underWater ? ActionType.InWater : ActionType.NotInWater, 1.0f, damageSource, statusEffectTargets);
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}
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}
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if (limb.WorldPosition != worldPosition && !MathUtils.NearlyEqual(force, 0.0f))
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{
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Vector2 limbDiff = Vector2.Normalize(limb.WorldPosition - worldPosition);
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if (!MathUtils.IsValid(limbDiff)) limbDiff = Rand.Vector(1.0f);
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Vector2 impulse = limbDiff * distFactor * force;
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Vector2 impulsePoint = limb.SimPosition - limbDiff * limbRadius;
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limb.body.ApplyLinearImpulse(impulse, impulsePoint, maxVelocity: NetConfig.MaxPhysicsBodyVelocity);
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}
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}
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//sever joints
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if (c.IsDead && attack.SeverLimbsProbability > 0.0f)
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{
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foreach (Limb limb in c.AnimController.Limbs)
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{
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if (!distFactors.ContainsKey(limb)) { continue; }
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if (Rand.Range(0.0f, 1.0f) < attack.SeverLimbsProbability * distFactors[limb])
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{
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c.TrySeverLimbJoints(limb, 1.0f);
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}
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}
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}
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}
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}
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/// <summary>
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/// Returns a dictionary where the keys are the structures that took damage and the values are the amount of damage taken
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/// </summary>
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public static Dictionary<Structure, float> RangedStructureDamage(Vector2 worldPosition, float worldRange, float damage, Character attacker = null)
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{
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List<Structure> structureList = new List<Structure>();
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float dist = 600.0f;
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foreach (MapEntity entity in MapEntity.mapEntityList)
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{
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if (!(entity is Structure structure)) { continue; }
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if (structure.HasBody &&
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!structure.IsPlatform &&
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Vector2.Distance(structure.WorldPosition, worldPosition) < dist * 3.0f)
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{
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structureList.Add(structure);
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}
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}
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Dictionary<Structure, float> damagedStructures = new Dictionary<Structure, float>();
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foreach (Structure structure in structureList)
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{
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for (int i = 0; i < structure.SectionCount; i++)
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{
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float distFactor = 1.0f - (Vector2.Distance(structure.SectionPosition(i, true), worldPosition) / worldRange);
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if (distFactor <= 0.0f) continue;
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structure.AddDamage(i, damage * distFactor, attacker);
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if (damagedStructures.ContainsKey(structure))
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{
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damagedStructures[structure] += damage * distFactor;
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}
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else
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{
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damagedStructures.Add(structure, damage * distFactor);
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}
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}
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}
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return damagedStructures;
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}
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}
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}
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