Implement Skirmisher armor set bonus

Content/Buffs/Debuffs/ThermalMarkDebuff.cs

@@ -0,0 +1,25 @@
+using Terraria;
+using Terraria.ID;
+using Terraria.ModLoader;
+using ForgottenWawiTech.Content.GlobalNPCs;
+
+namespace ForgottenWawiTech.Content.Buffs.Debuffs
+{
+    public class ThermalMarkDebuff : ModBuff
+    {
+        public override void SetStaticDefaults()
+        {
+            Main.debuff[Type] = true;
+            Main.pvpBuff[Type] = true;
+            Main.buffNoSave[Type] = true;
+            BuffID.Sets.LongerExpertDebuff[Type] = true;
+            BuffID.Sets.NurseCannotRemoveDebuff[Type] = true;
+        }
+
+        public override void Update(NPC npc, ref int buffIndex)
+        {
+            npc.GetGlobalNPC<ThermalMarkGlobalNPC>().ThermalMarked = true;
+            Lighting.AddLight(npc.Center, 0.9f, 0.45f, 0.2f);
+        }
+    }
+}

Content/GlobalNPCs/ThermalMarkGlobalNPC.cs

@@ -0,0 +1,26 @@
+using Terraria;
+using Terraria.ModLoader;
+using ForgottenWawiTech.Content.Buffs.Debuffs;
+
+namespace ForgottenWawiTech.Content.GlobalNPCs
+{
+    public class ThermalMarkGlobalNPC : GlobalNPC
+    {
+        public bool ThermalMarked { get; set; }
+
+        public override bool InstancePerEntity => true;
+
+        public override void ResetEffects(NPC npc)
+        {
+            ThermalMarked = false;
+        }
+
+        public override void ModifyIncomingHit(NPC npc, ref NPC.HitModifiers modifiers)
+        {
+            if (npc.HasBuff(ModContent.BuffType<ThermalMarkDebuff>()))
+            {
+                modifiers.FinalDamage *= 1.12f;
+            }
+        }
+    }
+}

Content/Items/Armor/AvaliSkirmisherSet/AvaliSkirmisherCowl.cs

@@ -4,6 +4,9 @@ using Terraria.ModLoader;
 using ForgottenWawiTech.Content.Items.Materials;
 using ForgottenWawiTech.Content.Rarities;
 using ForgottenWawiTech.Content.Items.Armor.AvaliScoutSet;
+using ForgottenWawiTech.Content.Players;
+
+// Pre-hardmode
 
 namespace ForgottenWawiTech.Content.Items.Armor.AvaliSkirmisherSet
 {
@@ -36,7 +39,7 @@ namespace ForgottenWawiTech.Content.Items.Armor.AvaliSkirmisherSet
             player.setBonus = "Summons thermal vision drones that mark enemies\nMarked enemies take 12% more damage\n+2 max minions and +20% summon damage";
             player.maxMinions += 2;
             player.GetDamage(DamageClass.Summon) += 0.20f;
-            // TODO: Implement thermal vision drone marking system
+            player.GetModPlayer<AvaliSkirmisherPlayer>().EnableThermalDrones();
         }
 
         public override void AddRecipes()

Content/Items/Armor/AvaliSkirmisherSet/AvaliSkirmisherHelmet.cs

@@ -4,6 +4,7 @@ using Terraria.ModLoader;
 using ForgottenWawiTech.Content.Items.Materials;
 using ForgottenWawiTech.Content.Rarities;
 using ForgottenWawiTech.Content.Items.Armor.AvaliScoutSet;
+using ForgottenWawiTech.Content.Players;
 
 namespace ForgottenWawiTech.Content.Items.Armor.AvaliSkirmisherSet
 {
@@ -37,7 +38,7 @@ namespace ForgottenWawiTech.Content.Items.Armor.AvaliSkirmisherSet
             player.setBonus = "Summons thermal vision drones that mark enemies\nMarked enemies take 12% more damage\n+15% melee damage and speed";
             player.GetDamage(DamageClass.Melee) += 0.15f;
             player.GetAttackSpeed(DamageClass.Melee) += 0.15f;
-            // TODO: Implement thermal vision drone marking system
+            player.GetModPlayer<AvaliSkirmisherPlayer>().EnableThermalDrones();
         }
 
         public override void AddRecipes()

Content/Items/Armor/AvaliSkirmisherSet/AvaliSkirmisherHood.cs

@@ -4,6 +4,7 @@ using Terraria.ModLoader;
 using ForgottenWawiTech.Content.Items.Materials;
 using ForgottenWawiTech.Content.Rarities;
 using ForgottenWawiTech.Content.Items.Armor.AvaliScoutSet;
+using ForgottenWawiTech.Content.Players;
 
 namespace ForgottenWawiTech.Content.Items.Armor.AvaliSkirmisherSet
 {
@@ -37,7 +38,7 @@ namespace ForgottenWawiTech.Content.Items.Armor.AvaliSkirmisherSet
             player.setBonus = "Summons thermal vision drones that mark enemies\nMarked enemies take 12% more damage\n+20% magic damage and -15% mana cost";
             player.GetDamage(DamageClass.Magic) += 0.20f;
             player.manaCost -= 0.15f;
-            // TODO: Implement thermal vision drone marking system
+            player.GetModPlayer<AvaliSkirmisherPlayer>().EnableThermalDrones();
         }
 
         public override void AddRecipes()

Content/Items/Armor/AvaliSkirmisherSet/AvaliSkirmisherMask.cs

@@ -4,6 +4,7 @@ using Terraria.ModLoader;
 using ForgottenWawiTech.Content.Items.Materials;
 using ForgottenWawiTech.Content.Rarities;
 using ForgottenWawiTech.Content.Items.Armor.AvaliScoutSet;
+using ForgottenWawiTech.Content.Players;
 
 namespace ForgottenWawiTech.Content.Items.Armor.AvaliSkirmisherSet
 {
@@ -36,7 +37,7 @@ namespace ForgottenWawiTech.Content.Items.Armor.AvaliSkirmisherSet
             player.setBonus = "Summons thermal vision drones that mark enemies\nMarked enemies take 12% more damage\n+18% ranged damage and critical strike chance";
             player.GetDamage(DamageClass.Ranged) += 0.18f;
             player.GetCritChance(DamageClass.Ranged) += 18;
-            // TODO: Implement thermal vision drone marking system
+            player.GetModPlayer<AvaliSkirmisherPlayer>().EnableThermalDrones();
         }
 
         public override void AddRecipes()

Content/Players/AvaliSkirmisherPlayer.cs

@@ -0,0 +1,63 @@
+using Microsoft.Xna.Framework;
+using Terraria;
+using Terraria.ID;
+using Terraria.ModLoader;
+using ForgottenWawiTech.Content.Projectiles.Avali;
+
+namespace ForgottenWawiTech.Content.Players
+{
+    public class AvaliSkirmisherPlayer : ModPlayer
+    {
+        private const int DroneCount = 2;
+        private const float SpawnRadius = 60f;
+
+        public bool ThermalDronesActive { get; private set; }
+
+        public override void ResetEffects()
+        {
+            ThermalDronesActive = false;
+        }
+
+        public void EnableThermalDrones()
+        {
+            ThermalDronesActive = true;
+        }
+
+        public override void PostUpdate()
+        {
+            if (!ThermalDronesActive)
+            {
+                return;
+            }
+
+            if (Player.whoAmI != Main.myPlayer)
+            {
+                return;
+            }
+
+            int droneType = ModContent.ProjectileType<AvaliThermalDrone>();
+            int owned = Player.ownedProjectileCounts[droneType];
+            if (owned >= DroneCount)
+            {
+                return;
+            }
+
+            var source = Player.GetSource_Misc("AvaliSkirmisherSet");
+            for (int i = owned; i < DroneCount; i++)
+            {
+                float rotationOffset = MathHelper.TwoPi * i / DroneCount;
+                Vector2 spawnPos = Player.Center + rotationOffset.ToRotationVector2() * SpawnRadius;
+                Projectile.NewProjectile(
+                    source,
+                    spawnPos,
+                    Vector2.Zero,
+                    droneType,
+                    0,
+                    0f,
+                    Player.whoAmI,
+                    i,
+                    DroneCount);
+            }
+        }
+    }
+}

Content/Projectiles/Avali/AvaliThermalDrone.cs

@@ -0,0 +1,107 @@
+using Microsoft.Xna.Framework;
+using Terraria;
+using Terraria.ID;
+using Terraria.ModLoader;
+using ForgottenWawiTech.Content.Buffs.Debuffs;
+using ForgottenWawiTech.Content.Players;
+
+namespace ForgottenWawiTech.Content.Projectiles.Avali
+{
+    public class AvaliThermalDrone : ModProjectile
+    {
+        private const float OrbitSpeed = 0.06f;
+        private const float OrbitRadius = 72f;
+        private const int MarkCooldown = 45;
+        private const float MarkRange = 700f;
+
+        public override void SetStaticDefaults()
+        {
+            ProjectileID.Sets.MinionSacrificable[Type] = false;
+            ProjectileID.Sets.MinionShot[Type] = true;
+        }
+
+        public override void SetDefaults()
+        {
+            Projectile.width = 26;
+            Projectile.height = 26;
+            Projectile.friendly = true;
+            Projectile.DamageType = DamageClass.Summon;
+            Projectile.penetrate = -1;
+            Projectile.tileCollide = false;
+            Projectile.ignoreWater = true;
+            Projectile.timeLeft = 2;
+            Projectile.netImportant = true;
+            Projectile.minion = true;
+            Projectile.minionSlots = 0f;
+        }
+
+        public override void AI()
+        {
+            Player owner = Main.player[Projectile.owner];
+            AvaliSkirmisherPlayer modPlayer = owner.GetModPlayer<AvaliSkirmisherPlayer>();
+            if (!owner.active || owner.dead || !modPlayer.ThermalDronesActive)
+            {
+                Projectile.Kill();
+                return;
+            }
+
+            Projectile.timeLeft = 2;
+
+            float index = Projectile.ai[0];
+            float total = Projectile.ai[1];
+            if (total <= 0f)
+            {
+                total = 2f;
+            }
+
+            float rotation = (Main.GameUpdateCount * OrbitSpeed) + index * MathHelper.TwoPi / total;
+            Vector2 offset = rotation.ToRotationVector2() * OrbitRadius;
+            Projectile.Center = owner.Center + offset;
+            Projectile.velocity = owner.velocity;
+
+            Lighting.AddLight(Projectile.Center, 0.55f, 0.2f, 0.15f);
+
+            if (Projectile.localAI[0]++ >= MarkCooldown)
+            {
+                Projectile.localAI[0] = 0f;
+                if (Projectile.owner == Main.myPlayer)
+                {
+                    NPC target = FindTarget(Projectile.Center, MarkRange);
+                    if (target != null)
+                    {
+                        target.AddBuff(ModContent.BuffType<ThermalMarkDebuff>(), 300);
+                        Vector2 burstDirection = (target.Center - Projectile.Center).SafeNormalize(Vector2.UnitY);
+                        for (int i = 0; i < 6; i++)
+                        {
+                            Dust dust = Dust.NewDustDirect(Projectile.Center, 0, 0, DustID.Torch, burstDirection.X * 4f, burstDirection.Y * 4f, 120, default, 1.1f);
+                            dust.noGravity = true;
+                        }
+                    }
+                }
+            }
+        }
+
+        private static NPC FindTarget(Vector2 center, float range)
+        {
+            NPC selected = null;
+            float sqrRange = range * range;
+            for (int i = 0; i < Main.maxNPCs; i++)
+            {
+                NPC npc = Main.npc[i];
+                if (!npc.active || npc.friendly || npc.dontTakeDamage || npc.life <= 0)
+                {
+                    continue;
+                }
+
+                float dist = Vector2.DistanceSquared(center, npc.Center);
+                if (dist < sqrRange && Collision.CanHitLine(center, 0, 0, npc.Center, 0, 0))
+                {
+                    sqrRange = dist;
+                    selected = npc;
+                }
+            }
+
+            return selected;
+        }
+    }
+}