tsiva/Buffs/Parasitism.cs

using Siva.Projectiles;
using Terraria;
using Terraria.ModLoader;


namespace Siva.Buffs
{
    public class Parasitism : ModBuff
    {
        public static readonly int BuffType = ModContent.BuffType<Parasitism>();

        public override void SetStaticDefaults()
        {
            Main.debuff[Type] = true;  // Indicates this is a negative effect.
            Main.buffNoSave[Type] = true;  // Indicates that the buff won't save when exiting the game.
            Main.buffNoTimeDisplay[Type] = false; // Shows the duration on the buff icon.
        }

    // What happens while the debuff is a applied
        public override void Update(NPC npc, ref int buffIndex)
        {
            // Do I make them glow red or anything?
        }

        public static int AttachedNaniteCount(NPC npc)
        {
            int attachedNanites = 0;
            foreach (var p in Main.ActiveProjectiles)
            {
                if (p.type == SIVANanite.ProjectileType && p.ai[0] == 1f && p.ai[1] == npc.whoAmI) {
                    attachedNanites++;
                    // Main.NewText($"{attachedNanites}"); // Debug text
                }
            }
            return attachedNanites;
        }

        public static float GetParasitismScaleFactor(int attachedNanites)
        {
            if(attachedNanites <= 5)
            {
                return attachedNanites*0.3f;
            }
            else if(attachedNanites > 5 && attachedNanites < 100)
            {
                return (attachedNanites-5)*0.021f+1.5f;
            }
            else if(attachedNanites >= 100)
            {
                return 3.5f;
            }
            else
            {
                return 0f;
            }
        }

        public class ParasitismScaling : GlobalNPC
        {
            public override bool InstancePerEntity => true;

            public override void ModifyHitByProjectile(NPC npc, Projectile projectile, ref NPC.HitModifiers modifiers)
            {
                if(LogicPerfected.ParasitismOnTarget(npc) && projectile.owner == Main.myPlayer) // Check to make sure the projectile is the local players rather than any other projectils from any other gun. Trying to prevent hypothetical exploits.
                {
                    if(LogicPerfected.NormBullet(projectile))
                    {
                            float scaleFactor = GetParasitismScaleFactor(AttachedNaniteCount(npc));
                            AddableFloat addableScaleFactor = AddableFloat.Zero + scaleFactor;
                            modifiers.ScalingBonusDamage = addableScaleFactor;
                            Main.NewText($"norm {scaleFactor}"); // debug text
                    }
                    else if(LogicPerfected.MasterBulletOrNanite(projectile))
                    {
                            float scaleFactor = GetParasitismScaleFactor(AttachedNaniteCount(npc));
                            AddableFloat addableScaleFactor = AddableFloat.Zero + scaleFactor;
                            modifiers.ScalingBonusDamage = addableScaleFactor;
                            Main.NewText($"master {scaleFactor}"); // debug text
                    }
                }
            }
        }
    }
}