From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Owen1212055 <23108066+Owen1212055@users.noreply.github.com>
Date: Tue, 22 Jun 2021 23:41:11 -0400
Subject: [PATCH] More Projectile API

== AT ==
public net.minecraft.world.entity.projectile.FishingHook timeUntilLured
public net.minecraft.world.entity.projectile.FishingHook fishAngle
public net.minecraft.world.entity.projectile.ShulkerBullet targetDeltaX
public net.minecraft.world.entity.projectile.ShulkerBullet targetDeltaY
public net.minecraft.world.entity.projectile.ShulkerBullet targetDeltaZ
public net.minecraft.world.entity.projectile.ShulkerBullet currentMoveDirection
public net.minecraft.world.entity.projectile.ShulkerBullet flightSteps
public net.minecraft.world.entity.projectile.AbstractArrow soundEvent
public net.minecraft.world.entity.projectile.AbstractArrow setPickupItemStack(Lnet/minecraft/world/item/ItemStack;)V
public net.minecraft.world.entity.projectile.ThrownTrident dealtDamage
public net.minecraft.world.entity.projectile.Arrow NO_EFFECT_COLOR
public net.minecraft.world.entity.projectile.Projectile hasBeenShot
public net.minecraft.world.entity.projectile.Projectile leftOwner
public net.minecraft.world.entity.projectile.Projectile ownerUUID
public net.minecraft.world.entity.projectile.Projectile preOnHit(Lnet/minecraft/world/phys/HitResult;)V
public net.minecraft.world.entity.projectile.Projectile canHitEntity(Lnet/minecraft/world/entity/Entity;)Z
public net.minecraft.world.entity.projectile.FireworkRocketEntity getDefaultItem()Lnet/minecraft/world/item/ItemStack;
public net.minecraft.world.item.CrossbowItem FIREWORK_POWER

Co-authored-by: Nassim Jahnke <nassim@njahnke.dev>
Co-authored-by: SoSeDiK <mrsosedik@gmail.com>
Co-authored-by: MelnCat <melncatuwu@gmail.com>
Co-authored-by: Lulu13022002 <41980282+Lulu13022002@users.noreply.github.com>

diff --git a/src/main/java/net/minecraft/world/entity/projectile/FishingHook.java b/src/main/java/net/minecraft/world/entity/projectile/FishingHook.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/world/entity/projectile/FishingHook.java
+++ b/src/main/java/net/minecraft/world/entity/projectile/FishingHook.java
@@ -0,0 +0,0 @@ public class FishingHook extends Projectile {
                 }
             } else {
                 // CraftBukkit start - logic to modify fishing wait time
-                this.timeUntilLured = Mth.nextInt(this.random, this.minWaitTime, this.maxWaitTime);
-                this.timeUntilLured -= (this.applyLure) ? (this.lureSpeed >= this.maxWaitTime ? this.timeUntilLured - 1 : this.lureSpeed ) : 0; // Paper - Fix Lure infinite loop
+                this.resetTimeUntilLured(); // Paper - more projectile api - extract time until lured reset logic
                 // CraftBukkit end
             }
         }
 
     }
+    // Paper start - more projectile api - extract time until lured reset logic
+    public void resetTimeUntilLured() {
+        this.timeUntilLured = Mth.nextInt(this.random, this.minWaitTime, this.maxWaitTime);
+        this.timeUntilLured -= (this.applyLure) ? (this.lureSpeed >= this.maxWaitTime ? this.timeUntilLured - 1 : this.lureSpeed ) : 0; // Paper - Fix Lure infinite loop
+    }
+    // Paper end - more projectile api - extract time until lured reset logic
 
     public boolean calculateOpenWater(BlockPos pos) {
         FishingHook.OpenWaterType entityfishinghook_waterposition = FishingHook.OpenWaterType.INVALID;
diff --git a/src/main/java/net/minecraft/world/entity/projectile/Projectile.java b/src/main/java/net/minecraft/world/entity/projectile/Projectile.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/world/entity/projectile/Projectile.java
+++ b/src/main/java/net/minecraft/world/entity/projectile/Projectile.java
@@ -0,0 +0,0 @@ public abstract class Projectile extends Entity implements TraceableEntity {
     }
 
     // CraftBukkit start - call projectile hit event
-    protected ProjectileDeflection preHitTargetOrDeflectSelf(HitResult movingobjectposition) {
+    public ProjectileDeflection preHitTargetOrDeflectSelf(HitResult movingobjectposition) { // Paper - protected -> public
         org.bukkit.event.entity.ProjectileHitEvent event = org.bukkit.craftbukkit.event.CraftEventFactory.callProjectileHitEvent(this, movingobjectposition);
         this.hitCancelled = event != null && event.isCancelled();
         if (movingobjectposition.getType() == HitResult.Type.BLOCK || !this.hitCancelled) {
diff --git a/src/main/java/net/minecraft/world/entity/projectile/ThrownPotion.java b/src/main/java/net/minecraft/world/entity/projectile/ThrownPotion.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/world/entity/projectile/ThrownPotion.java
+++ b/src/main/java/net/minecraft/world/entity/projectile/ThrownPotion.java
@@ -0,0 +0,0 @@ public class ThrownPotion extends ThrowableItemProjectile {
     @Override
     protected void onHit(HitResult hitResult) {
         super.onHit(hitResult);
+        // Paper start - More projectile API
+        this.splash(hitResult);
+    }
+    public void splash(@Nullable HitResult hitResult) {
+        // Paper end - More projectile API
         Level world = this.level();
-
         if (world instanceof ServerLevel worldserver) {
             ItemStack itemstack = this.getItem();
             PotionContents potioncontents = (PotionContents) itemstack.getOrDefault(DataComponents.POTION_CONTENTS, PotionContents.EMPTY);
@@ -0,0 +0,0 @@ public class ThrownPotion extends ThrowableItemProjectile {
                 if (this.isLingering()) {
                     showParticles = this.makeAreaOfEffectCloud(potioncontents, hitResult); // CraftBukkit - Pass MovingObjectPosition // Paper
                 } else {
-                    showParticles = this.applySplash(worldserver, potioncontents.getAllEffects(), hitResult.getType() == HitResult.Type.ENTITY ? ((EntityHitResult) hitResult).getEntity() : null, hitResult); // CraftBukkit - Pass MovingObjectPosition // Paper
+                    showParticles = this.applySplash(worldserver, potioncontents.getAllEffects(), hitResult != null && hitResult.getType() == HitResult.Type.ENTITY ? ((EntityHitResult) hitResult).getEntity() : null, hitResult); // CraftBukkit - Pass MovingObjectPosition // Paper - More projectile API
                 }
             }
 
@@ -0,0 +0,0 @@ public class ThrownPotion extends ThrowableItemProjectile {
 
     }
 
-    private boolean applySplash(ServerLevel worldserver, Iterable<MobEffectInstance> iterable, @Nullable Entity entity, HitResult position) { // CraftBukkit - Pass MovingObjectPosition // Paper - Fix potions splash events
+    private boolean applySplash(ServerLevel worldserver, Iterable<MobEffectInstance> iterable, @Nullable Entity entity, @Nullable HitResult position) { // CraftBukkit - Pass MovingObjectPosition // Paper - Fix potions splash events & More projectile API
         AABB axisalignedbb = this.getBoundingBox().inflate(4.0D, 2.0D, 4.0D);
         List<net.minecraft.world.entity.LivingEntity> list = worldserver.getEntitiesOfClass(net.minecraft.world.entity.LivingEntity.class, axisalignedbb);
         Map<LivingEntity, Double> affected = new HashMap<LivingEntity, Double>(); // CraftBukkit
@@ -0,0 +0,0 @@ public class ThrownPotion extends ThrowableItemProjectile {
 
     }
 
-    private boolean makeAreaOfEffectCloud(PotionContents potioncontents, HitResult position) { // CraftBukkit - Pass MovingObjectPosition
+    private boolean makeAreaOfEffectCloud(PotionContents potioncontents, @Nullable HitResult position) { // CraftBukkit - Pass MovingObjectPosition // Paper - More projectile API
         AreaEffectCloud entityareaeffectcloud = new AreaEffectCloud(this.level(), this.getX(), this.getY(), this.getZ());
         Entity entity = this.getOwner();
 
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/AbstractProjectile.java b/src/main/java/org/bukkit/craftbukkit/entity/AbstractProjectile.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/AbstractProjectile.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/AbstractProjectile.java
@@ -0,0 +0,0 @@ public abstract class AbstractProjectile extends CraftEntity implements Projecti
     @Override
     public void setBounce(boolean doesBounce) {}
 
+    // Paper start - More projectile API
+    @Override
+    public boolean hasLeftShooter() {
+        return this.getHandle().leftOwner;
+    }
+
+    @Override
+    public void setHasLeftShooter(boolean leftShooter) {
+        this.getHandle().leftOwner = leftShooter;
+    }
+
+    @Override
+    public boolean hasBeenShot() {
+        return this.getHandle().hasBeenShot;
+    }
+
+    @Override
+    public void setHasBeenShot(boolean beenShot) {
+        this.getHandle().hasBeenShot = beenShot;
+    }
+
+    @Override
+    public boolean canHitEntity(org.bukkit.entity.Entity entity) {
+        return this.getHandle().canHitEntity(((CraftEntity) entity).getHandle());
+    }
+
+    @Override
+    public void hitEntity(org.bukkit.entity.Entity entity) {
+        this.getHandle().preHitTargetOrDeflectSelf(new net.minecraft.world.phys.EntityHitResult(((CraftEntity) entity).getHandle()));
+    }
+
+    @Override
+    public void hitEntity(org.bukkit.entity.Entity entity, org.bukkit.util.Vector vector) {
+        this.getHandle().preHitTargetOrDeflectSelf(new net.minecraft.world.phys.EntityHitResult(((CraftEntity) entity).getHandle(), new net.minecraft.world.phys.Vec3(vector.getX(), vector.getY(), vector.getZ())));
+    }
+
+    @Override
+    public net.minecraft.world.entity.projectile.Projectile getHandle() {
+        return (net.minecraft.world.entity.projectile.Projectile) entity;
+    }
+
+    @Override
+    public final org.bukkit.projectiles.ProjectileSource getShooter() {
+        return this.getHandle().projectileSource;
+    }
+
+    @Override
+    public final void setShooter(org.bukkit.projectiles.ProjectileSource shooter) {
+        if (shooter instanceof CraftEntity craftEntity) {
+            this.getHandle().setOwner(craftEntity.getHandle());
+        } else {
+            this.getHandle().setOwner(null);
+        }
+        this.getHandle().projectileSource = shooter;
+    }
+
+    @Override
+    public java.util.UUID getOwnerUniqueId() {
+        return this.getHandle().ownerUUID;
+    }
+    // Paper end - More projectile API
 }
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftAbstractArrow.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftAbstractArrow.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftAbstractArrow.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftAbstractArrow.java
@@ -0,0 +0,0 @@ public class CraftAbstractArrow extends AbstractProjectile implements AbstractAr
         this.getHandle().setCritArrow(critical);
     }
 
-    @Override
-    public ProjectileSource getShooter() {
-        return this.getHandle().projectileSource;
-    }
-
-    @Override
-    public void setShooter(ProjectileSource shooter) {
-        if (shooter instanceof Entity) {
-            this.getHandle().setOwner(((CraftEntity) shooter).getHandle());
-        } else {
-            this.getHandle().setOwner(null);
-        }
-        this.getHandle().projectileSource = shooter;
-    }
+    // Paper - moved to AbstractProjectile
 
     @Override
     public boolean isInBlock() {
@@ -0,0 +0,0 @@ public class CraftAbstractArrow extends AbstractProjectile implements AbstractAr
 
     @Override
     public ItemStack getWeapon() {
+        if (this.getHandle().getWeaponItem() == null) return null; // Paper - fix NPE
         return CraftItemStack.asBukkitCopy(this.getHandle().getWeaponItem());
     }
 
@@ -0,0 +0,0 @@ public class CraftAbstractArrow extends AbstractProjectile implements AbstractAr
     public String toString() {
         return "CraftArrow";
     }
+
+    // Paper start
+    @Override
+    public CraftItemStack getItemStack() {
+        return CraftItemStack.asCraftMirror(this.getHandle().getPickupItem());
+    }
+
+    @Override
+    public void setItemStack(final ItemStack stack) {
+        Preconditions.checkArgument(stack != null, "ItemStack cannot be null");
+        this.getHandle().setPickupItemStack(CraftItemStack.asNMSCopy(stack));
+    }
+
+    @Override
+    public void setLifetimeTicks(int ticks) {
+        this.getHandle().life = ticks;
+    }
+
+    @Override
+    public int getLifetimeTicks() {
+        return this.getHandle().life;
+    }
+
+    @Override
+    public org.bukkit.Sound getHitSound() {
+        return org.bukkit.craftbukkit.CraftSound.minecraftToBukkit(this.getHandle().soundEvent);
+    }
+
+    @Override
+    public void setHitSound(org.bukkit.Sound sound) {
+        this.getHandle().setSoundEvent(org.bukkit.craftbukkit.CraftSound.bukkitToMinecraft(sound));
+    }
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftAreaEffectCloud.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftAreaEffectCloud.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftAreaEffectCloud.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftAreaEffectCloud.java
@@ -0,0 +0,0 @@ public class CraftAreaEffectCloud extends CraftEntity implements AreaEffectCloud
 
     @Override
     public Color getColor() {
-        return Color.fromRGB(this.getHandle().potionContents.getColor());
+        return Color.fromRGB(this.getHandle().potionContents.getColor() & 0x00FFFFFF); // Paper - skip alpha channel
     }
 
     @Override
@@ -0,0 +0,0 @@ public class CraftAreaEffectCloud extends CraftEntity implements AreaEffectCloud
             this.removeCustomEffect(effect.getType());
         }
         this.getHandle().addEffect(CraftPotionUtil.fromBukkit(effect));
-        this.getHandle().updateColor();
+        // this.getHandle().updateColor(); // Paper - already done above
         return true;
     }
 
@@ -0,0 +0,0 @@ public class CraftAreaEffectCloud extends CraftEntity implements AreaEffectCloud
     public void clearCustomEffects() {
         PotionContents old = this.getHandle().potionContents;
         this.getHandle().setPotionContents(new PotionContents(old.potion(), old.customColor(), List.of(), old.customName()));
-        this.getHandle().updateColor();
+        // this.getHandle().updateColor(); // Paper - already done above
     }
 
     @Override
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftArrow.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftArrow.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftArrow.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftArrow.java
@@ -0,0 +0,0 @@ public class CraftArrow extends CraftAbstractArrow implements Arrow {
             this.removeCustomEffect(effect.getType());
         }
         this.getHandle().addEffect(CraftPotionUtil.fromBukkit(effect));
-        this.getHandle().updateColor();
+        // this.getHandle().updateColor(); // Paper - already done above
         return true;
     }
 
@@ -0,0 +0,0 @@ public class CraftArrow extends CraftAbstractArrow implements Arrow {
     public void clearCustomEffects() {
         PotionContents old = this.getHandle().getPotionContents();
         this.getHandle().setPotionContents(new PotionContents(old.potion(), old.customColor(), List.of(), old.customName()));
-        this.getHandle().updateColor();
+        // this.getHandle().updateColor(); // Paper - already done above
     }
 
     @Override
@@ -0,0 +0,0 @@ public class CraftArrow extends CraftAbstractArrow implements Arrow {
 
     @Override
     public void setColor(Color color) {
-        int colorRGB = (color == null) ? -1 : color.asRGB();
+        int colorRGB = (color == null) ? net.minecraft.world.entity.projectile.Arrow.NO_EFFECT_COLOR : color.asARGB(); // Paper
         PotionContents old = this.getHandle().getPotionContents();
         this.getHandle().setPotionContents(new PotionContents(old.potion(), Optional.of(colorRGB), old.customEffects(), old.customName()));
     }
 
     @Override
     public Color getColor() {
-        if (this.getHandle().getColor() <= -1) {
+        int color = this.getHandle().getColor(); // Paper
+        if (color == net.minecraft.world.entity.projectile.Arrow.NO_EFFECT_COLOR) { // Paper
             return null;
         }
-        return Color.fromRGB(this.getHandle().getColor());
+        return Color.fromARGB(color); // Paper
     }
 }
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntityTypes.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntityTypes.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntityTypes.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntityTypes.java
@@ -0,0 +0,0 @@ public final class CraftEntityTypes {
             BlockPos pos = BlockPos.containing(spawnData.x(), spawnData.y(), spawnData.z());
             return new FallingBlockEntity(spawnData.minecraftWorld(), spawnData.x(), spawnData.y(), spawnData.z(), spawnData.world().getBlockState(pos)); // Paper - create falling block entities correctly
         }));
-        register(new EntityTypeData<>(EntityType.FIREWORK_ROCKET, Firework.class, CraftFirework::new, spawnData -> new FireworkRocketEntity(spawnData.minecraftWorld(), spawnData.x(), spawnData.y(), spawnData.z(), net.minecraft.world.item.ItemStack.EMPTY)));
+        register(new EntityTypeData<>(EntityType.FIREWORK_ROCKET, Firework.class, CraftFirework::new, spawnData -> new FireworkRocketEntity(spawnData.minecraftWorld(), spawnData.x(), spawnData.y(), spawnData.z(), FireworkRocketEntity.getDefaultItem()))); // Paper - pass correct default to rocket for data storage
         register(new EntityTypeData<>(EntityType.EVOKER_FANGS, EvokerFangs.class, CraftEvokerFangs::new, spawnData -> new net.minecraft.world.entity.projectile.EvokerFangs(spawnData.minecraftWorld(), spawnData.x(), spawnData.y(), spawnData.z(), (float) Math.toRadians(spawnData.yaw()), 0, null)));
         register(new EntityTypeData<>(EntityType.COMMAND_BLOCK_MINECART, CommandMinecart.class, CraftMinecartCommand::new, createMinecart(net.minecraft.world.entity.EntityType.COMMAND_BLOCK_MINECART)));
         register(new EntityTypeData<>(EntityType.MINECART, RideableMinecart.class, CraftMinecartRideable::new, createMinecart(net.minecraft.world.entity.EntityType.MINECART)));
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftFireball.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftFireball.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftFireball.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftFireball.java
@@ -0,0 +0,0 @@ public class CraftFireball extends AbstractProjectile implements Fireball {
         this.getHandle().bukkitYield = yield;
     }
 
-    @Override
-    public ProjectileSource getShooter() {
-        return this.getHandle().projectileSource;
-    }
-
-    @Override
-    public void setShooter(ProjectileSource shooter) {
-        if (shooter instanceof CraftLivingEntity) {
-            this.getHandle().setOwner(((CraftLivingEntity) shooter).getHandle());
-        } else {
-            this.getHandle().setOwner(null);
-        }
-        this.getHandle().projectileSource = shooter;
-    }
+    // Paper - moved to AbstractProjectile
 
     @Override
     public Vector getDirection() {
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftFirework.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftFirework.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftFirework.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftFirework.java
@@ -0,0 +0,0 @@ import org.bukkit.inventory.meta.FireworkMeta;
 public class CraftFirework extends CraftProjectile implements Firework {
 
     private final Random random = new Random();
-    private final CraftItemStack item;
+    //private CraftItemStack item; // Paper - Remove usage, not accurate representation of current item.
 
     public CraftFirework(CraftServer server, FireworkRocketEntity entity) {
         super(server, entity);
 
-        ItemStack item = this.getHandle().getEntityData().get(FireworkRocketEntity.DATA_ID_FIREWORKS_ITEM);
-
-        if (item.isEmpty()) {
-            item = new ItemStack(Items.FIREWORK_ROCKET);
-            this.getHandle().getEntityData().set(FireworkRocketEntity.DATA_ID_FIREWORKS_ITEM, item);
-        }
-
-        this.item = CraftItemStack.asCraftMirror(item);
-
-        // Ensure the item is a firework...
-        if (this.item.getType() != Material.FIREWORK_ROCKET) {
-            this.item.setType(Material.FIREWORK_ROCKET);
-        }
+        // Paper start - Expose firework item directly
+//        ItemStack item = this.getHandle().getEntityData().get(FireworkRocketEntity.DATA_ID_FIREWORKS_ITEM);
+//
+//        if (item.isEmpty()) {
+//            item = new ItemStack(Items.FIREWORK_ROCKET);
+//            this.getHandle().getEntityData().set(FireworkRocketEntity.DATA_ID_FIREWORKS_ITEM, item);
+//        }
+//
+//        this.item = CraftItemStack.asCraftMirror(item);
+//
+//        // Ensure the item is a firework...
+//        if (this.item.getType() != Material.FIREWORK_ROCKET) {
+//            this.item.setType(Material.FIREWORK_ROCKET);
+//        }
+        // Paper end - Expose firework item directly
     }
 
     @Override
@@ -0,0 +0,0 @@ public class CraftFirework extends CraftProjectile implements Firework {
 
     @Override
     public FireworkMeta getFireworkMeta() {
-        return (FireworkMeta) this.item.getItemMeta();
+        return (FireworkMeta) CraftItemStack.getItemMeta(this.getHandle().getEntityData().get(FireworkRocketEntity.DATA_ID_FIREWORKS_ITEM), org.bukkit.inventory.ItemType.FIREWORK_ROCKET); // Paper - Expose firework item directly
     }
 
     @Override
     public void setFireworkMeta(FireworkMeta meta) {
-        this.item.setItemMeta(meta);
+        applyFireworkEffect(meta); // Paper - Expose firework item directly
 
         // Copied from EntityFireworks constructor, update firework lifetime/power
         this.getHandle().lifetime = 10 * (1 + meta.getPower()) + this.random.nextInt(6) + this.random.nextInt(7);
@@ -0,0 +0,0 @@ public class CraftFirework extends CraftProjectile implements Firework {
         return getHandle().spawningEntity;
     }
     // Paper end
+    // Paper start - Expose firework item directly + manually setting flight
+    @Override
+    public org.bukkit.inventory.ItemStack getItem() {
+        return CraftItemStack.asBukkitCopy(this.getHandle().getItem());
+    }
+
+    @Override
+    public void setItem(org.bukkit.inventory.ItemStack itemStack) {
+        FireworkMeta meta = getFireworkMeta();
+        ItemStack nmsItem = itemStack == null ? FireworkRocketEntity.getDefaultItem() : CraftItemStack.asNMSCopy(itemStack);
+        this.getHandle().getEntityData().set(FireworkRocketEntity.DATA_ID_FIREWORKS_ITEM, nmsItem);
+
+        applyFireworkEffect(meta);
+    }
+
+    @Override
+    public int getTicksFlown() {
+        return this.getHandle().life;
+    }
+
+    @Override
+    public void setTicksFlown(int ticks) {
+        this.getHandle().life = ticks;
+    }
+
+    @Override
+    public int getTicksToDetonate() {
+        return this.getHandle().lifetime;
+    }
+
+    @Override
+    public void setTicksToDetonate(int ticks) {
+        this.getHandle().lifetime = ticks;
+    }
+
+    void applyFireworkEffect(FireworkMeta meta) {
+        ItemStack item = this.getHandle().getItem();
+        CraftItemStack.applyMetaToItem(item, meta);
+
+        this.getHandle().getEntityData().set(FireworkRocketEntity.DATA_ID_FIREWORKS_ITEM, item);
+    }
+    // Paper end - Expose firework item directly + manually setting flight
 }
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftFishHook.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftFishHook.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftFishHook.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftFishHook.java
@@ -0,0 +0,0 @@ public class CraftFishHook extends CraftProjectile implements FishHook {
     public HookState getState() {
         return HookState.values()[this.getHandle().currentState.ordinal()];
     }
+    // Paper start - More FishHook API
+    @Override
+    public int getWaitTime() {
+        return this.getHandle().timeUntilLured;
+    }
+
+    @Override
+    public void setWaitTime(int ticks) {
+        this.getHandle().timeUntilLured = ticks;
+    }
+
+    @Override
+    public int getTimeUntilBite() {
+        return this.getHandle().timeUntilHooked;
+    }
+
+    @Override
+    public void setTimeUntilBite(final int ticks) {
+        com.google.common.base.Preconditions.checkArgument(ticks >= 1, "Cannot set time until bite to less than 1 (%s<1)", ticks);
+        final FishingHook hook = this.getHandle();
+
+        // Reset the fish angle hook only when this call "enters" the fish into the lure stage.
+        final boolean alreadyInLuringPhase = hook.timeUntilHooked > 0 && hook.timeUntilLured <= 0;
+        if (!alreadyInLuringPhase) {
+            hook.fishAngle = net.minecraft.util.Mth.nextFloat(hook.random, hook.minLureAngle, hook.maxLureAngle);
+            hook.timeUntilLured = 0;
+        }
+
+        hook.timeUntilHooked = ticks;
+    }
+
+    @Override
+    public void resetFishingState() {
+        final FishingHook hook = this.getHandle();
+        hook.resetTimeUntilLured();
+        hook.timeUntilHooked = 0; // Reset time until hooked, will be repopulated once lured time is ticked down.
+    }
+    // Paper end
 }
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
@@ -0,0 +0,0 @@ public class CraftLivingEntity extends CraftEntity implements LivingEntity {
     }
 
     @Override
-    @SuppressWarnings("unchecked")
     public <T extends Projectile> T launchProjectile(Class<? extends T> projectile, Vector velocity) {
+        // Paper start - launchProjectile consumer
+        return this.launchProjectile(projectile, velocity, null);
+    }
+
+    @Override
+    @SuppressWarnings("unchecked")
+    public <T extends Projectile> T launchProjectile(Class<? extends T> projectile, Vector velocity, java.util.function.Consumer<? super T> function) {
+        // Paper end - launchProjectile consumer
         Preconditions.checkState(!this.getHandle().generation, "Cannot launch projectile during world generation");
 
         net.minecraft.world.level.Level world = ((CraftWorld) this.getWorld()).getHandle();
@@ -0,0 +0,0 @@ public class CraftLivingEntity extends CraftEntity implements LivingEntity {
             } else {
                 launch = new net.minecraft.world.entity.projectile.Arrow(world, this.getHandle(), new net.minecraft.world.item.ItemStack(net.minecraft.world.item.Items.ARROW), null);
             }
-            ((net.minecraft.world.entity.projectile.AbstractArrow) launch).shootFromRotation(this.getHandle(), this.getHandle().getXRot(), this.getHandle().getYRot(), 0.0F, 3.0F, 1.0F); // ItemBow
+            ((net.minecraft.world.entity.projectile.AbstractArrow) launch).shootFromRotation(this.getHandle(), this.getHandle().getXRot(), this.getHandle().getYRot(), 0.0F, Trident.class.isAssignableFrom(projectile) ? net.minecraft.world.item.TridentItem.SHOOT_POWER : 3.0F, 1.0F); // ItemBow // Paper - see TridentItem
         } else if (ThrownPotion.class.isAssignableFrom(projectile)) {
             if (LingeringPotion.class.isAssignableFrom(projectile)) {
                 launch = new net.minecraft.world.entity.projectile.ThrownPotion(world, this.getHandle(), new net.minecraft.world.item.ItemStack(Items.LINGERING_POTION));
@@ -0,0 +0,0 @@ public class CraftLivingEntity extends CraftEntity implements LivingEntity {
         } else if (Firework.class.isAssignableFrom(projectile)) {
             Location location = this.getEyeLocation();
 
-            launch = new FireworkRocketEntity(world, net.minecraft.world.item.ItemStack.EMPTY, this.getHandle());
-            launch.moveTo(location.getX(), location.getY(), location.getZ(), location.getYaw(), location.getPitch());
+            // Paper start - see CrossbowItem
+            launch = new FireworkRocketEntity(world, FireworkRocketEntity.getDefaultItem(), this.getHandle(), location.getX(), location.getY() - 0.15F, location.getZ(), true); // Paper - pass correct default to rocket for data storage & see CrossbowItem for regular launch without elytra boost
+
+            // Lifted from net.minecraft.world.item.ProjectileWeaponItem.shoot
+            float f2 = /* net.minecraft.world.item.enchantment.EnchantmentHelper.processProjectileSpread((ServerLevel) world, new net.minecraft.world.item.ItemStack(net.minecraft.world.item.Items.CROSSBOW), this.getHandle(), 0.0F); */ 0; // Just shortcut this to 0, no need to do any calculations on a non existing stack
+            int projectileSize = 1;
+            int i = 0;
+
+            float f3 = projectileSize == 1 ? 0.0F : 2.0F * f2 / (float) (projectileSize - 1);
+            float f4 = (float) ((projectileSize - 1) % 2) * f3 / 2.0F;
+            float f5 = 1.0F;
+            float yaw = f4 + f5 * (float) ((i + 1) / 2) * f3;
+
+            // Lifted from net.minecraft.world.item.CrossbowItem.shootProjectile
+            Vec3 vec3 = this.getHandle().getUpVector(1.0F);
+            org.joml.Quaternionf quaternionf = new org.joml.Quaternionf().setAngleAxis((double)(yaw * (float) (Math.PI / 180.0)), vec3.x, vec3.y, vec3.z);
+            Vec3 vec32 = this.getHandle().getViewVector(1.0F);
+            org.joml.Vector3f vector3f = vec32.toVector3f().rotate(quaternionf);
+            ((FireworkRocketEntity) launch).shoot((double)vector3f.x(), (double)vector3f.y(), (double)vector3f.z(), net.minecraft.world.item.CrossbowItem.FIREWORK_POWER, 1.0F);
+            // Paper end
         }
 
         Preconditions.checkArgument(launch != null, "Projectile (%s) not supported", projectile.getName());
@@ -0,0 +0,0 @@ public class CraftLivingEntity extends CraftEntity implements LivingEntity {
         if (velocity != null) {
             ((T) launch.getBukkitEntity()).setVelocity(velocity);
         }
+        // Paper start - launchProjectile consumer
+        if (function != null) {
+            function.accept((T) launch.getBukkitEntity());
+        }
+        // Paper end - launchProjectile consumer
 
         world.addFreshEntity(launch);
         return (T) launch.getBukkitEntity();
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftLlamaSpit.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftLlamaSpit.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftLlamaSpit.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftLlamaSpit.java
@@ -0,0 +0,0 @@ public class CraftLlamaSpit extends AbstractProjectile implements LlamaSpit {
         return "CraftLlamaSpit";
     }
 
-    @Override
-    public ProjectileSource getShooter() {
-        return (this.getHandle().getOwner() != null) ? (ProjectileSource) this.getHandle().getOwner().getBukkitEntity() : null;
-    }
-
-    @Override
-    public void setShooter(ProjectileSource source) {
-        this.getHandle().setOwner((source != null) ? ((CraftLivingEntity) source).getHandle() : null);
-    }
+    // Paper - moved to AbstractProjectile
 }
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftProjectile.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftProjectile.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftProjectile.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftProjectile.java
@@ -0,0 +0,0 @@ public abstract class CraftProjectile extends AbstractProjectile implements Proj
         super(server, entity);
     }
 
-    @Override
-    public ProjectileSource getShooter() {
-        return this.getHandle().projectileSource;
-    }
-
-    @Override
-    public void setShooter(ProjectileSource shooter) {
-        if (shooter instanceof CraftLivingEntity) {
-            this.getHandle().setOwner((LivingEntity) ((CraftLivingEntity) shooter).entity);
-        } else {
-            this.getHandle().setOwner(null);
-        }
-        this.getHandle().projectileSource = shooter;
-    }
+    // Paper - moved to AbstractProjectile
 
     @Override
     public net.minecraft.world.entity.projectile.Projectile getHandle() {
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftShulkerBullet.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftShulkerBullet.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftShulkerBullet.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftShulkerBullet.java
@@ -0,0 +0,0 @@ public class CraftShulkerBullet extends AbstractProjectile implements ShulkerBul
         super(server, entity);
     }
 
+    // Paper - moved to AbstractProjectile
+
+    @Override
+    public org.bukkit.entity.Entity getTarget() {
+        return this.getHandle().getTarget() != null ? this.getHandle().getTarget().getBukkitEntity() : null;
+    }
+
     @Override
-    public ProjectileSource getShooter() {
-        return this.getHandle().projectileSource;
+    public void setTarget(org.bukkit.entity.Entity target) {
+        Preconditions.checkState(!this.getHandle().generation, "Cannot set target during world generation");
+
+        this.getHandle().setTarget(target == null ? null : ((CraftEntity) target).getHandle());
     }
 
     @Override
-    public void setShooter(ProjectileSource shooter) {
-        if (shooter instanceof Entity) {
-            this.getHandle().setOwner(((CraftEntity) shooter).getHandle());
-        } else {
-            this.getHandle().setOwner(null);
+    public org.bukkit.util.Vector getTargetDelta() {
+        net.minecraft.world.entity.projectile.ShulkerBullet bullet = this.getHandle();
+        return new org.bukkit.util.Vector(bullet.targetDeltaX, bullet.targetDeltaY, bullet.targetDeltaZ);
+    }
+
+    @Override
+    public void setTargetDelta(org.bukkit.util.Vector vector) {
+        net.minecraft.world.entity.projectile.ShulkerBullet bullet = this.getHandle();
+        bullet.targetDeltaX = vector.getX();
+        bullet.targetDeltaY = vector.getY();
+        bullet.targetDeltaZ = vector.getZ();
+    }
+
+    @Override
+    public org.bukkit.block.BlockFace getCurrentMovementDirection() {
+        net.minecraft.core.Direction dir = this.getHandle().currentMoveDirection;
+        if (dir == null) {
+            return null; // random dir
         }
-        this.getHandle().projectileSource = shooter;
+        return org.bukkit.craftbukkit.block.CraftBlock.notchToBlockFace(dir);
     }
 
     @Override
-    public org.bukkit.entity.Entity getTarget() {
-        return this.getHandle().getTarget() != null ? this.getHandle().getTarget().getBukkitEntity() : null;
+    public void setCurrentMovementDirection(org.bukkit.block.BlockFace movementDirection) {
+        this.getHandle().currentMoveDirection = org.bukkit.craftbukkit.block.CraftBlock.blockFaceToNotch(movementDirection);
     }
 
     @Override
-    public void setTarget(org.bukkit.entity.Entity target) {
-        Preconditions.checkState(!this.getHandle().generation, "Cannot set target during world generation");
+    public int getFlightSteps() {
+        return this.getHandle().flightSteps;
+    }
 
-        this.getHandle().setTarget(target == null ? null : ((CraftEntity) target).getHandle());
+    @Override
+    public void setFlightSteps(int steps) {
+        this.getHandle().flightSteps = steps;
     }
 
     @Override
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftThrownPotion.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftThrownPotion.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftThrownPotion.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftThrownPotion.java
@@ -0,0 +0,0 @@ public class CraftThrownPotion extends CraftThrowableProjectile implements Throw
     @Override
     public void setItem(ItemStack item) {
         Preconditions.checkArgument(item != null, "ItemStack cannot be null");
-        Preconditions.checkArgument(item.getType() == Material.LINGERING_POTION || item.getType() == Material.SPLASH_POTION, "ItemStack material must be Material.LINGERING_POTION or Material.SPLASH_POTION but was Material.%s", item.getType());
+        // Preconditions.checkArgument(item.getType() == Material.LINGERING_POTION || item.getType() == Material.SPLASH_POTION, "ItemStack material must be Material.LINGERING_POTION or Material.SPLASH_POTION but was Material.%s", item.getType()); // Paper - Projectile API
+        org.bukkit.inventory.meta.PotionMeta meta = (item.getType() == Material.LINGERING_POTION || item.getType() == Material.SPLASH_POTION) ? null : this.getPotionMeta(); // Paper - Projectile API
 
         this.getHandle().setItem(CraftItemStack.asNMSCopy(item));
+        if (meta != null) this.setPotionMeta(meta); // Paper - Projectile API
     }
 
+    // Paper start - Projectile API
+    @Override
+    public org.bukkit.inventory.meta.PotionMeta getPotionMeta() {
+        return (org.bukkit.inventory.meta.PotionMeta) CraftItemStack.getItemMeta(this.getHandle().getItem(), org.bukkit.inventory.ItemType.SPLASH_POTION);
+    }
+
+    @Override
+    public void setPotionMeta(org.bukkit.inventory.meta.PotionMeta meta) {
+        net.minecraft.world.item.ItemStack item = this.getHandle().getItem();
+        CraftItemStack.applyMetaToItem(item, meta);
+        this.getHandle().setItem(item); // Reset item
+    }
+
+    @Override
+    public void splash() {
+        this.getHandle().splash(null);
+    }
+    // Paper end
     @Override
     public net.minecraft.world.entity.projectile.ThrownPotion getHandle() {
         return (net.minecraft.world.entity.projectile.ThrownPotion) this.entity;
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftTrident.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftTrident.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftTrident.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftTrident.java
@@ -0,0 +0,0 @@ public class CraftTrident extends CraftAbstractArrow implements Trident {
         com.google.common.base.Preconditions.checkArgument(loyaltyLevel >= 0 && loyaltyLevel <= 127, "The loyalty level has to be between 0 and 127");
         this.getHandle().setLoyalty((byte) loyaltyLevel);
     }
+
+    @Override
+    public boolean hasDealtDamage() {
+        return this.getHandle().dealtDamage;
+    }
+
+    @Override
+    public void setHasDealtDamage(boolean hasDealtDamage) {
+        this.getHandle().dealtDamage = hasDealtDamage;
+    }
     // Paper end
 }
diff --git a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
+++ b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
@@ -0,0 +0,0 @@ public class CraftEventFactory {
     /**
      * PotionSplashEvent
      */
-    public static PotionSplashEvent callPotionSplashEvent(net.minecraft.world.entity.projectile.ThrownPotion potion, HitResult position, Map<LivingEntity, Double> affectedEntities) {
+    public static PotionSplashEvent callPotionSplashEvent(net.minecraft.world.entity.projectile.ThrownPotion potion, @Nullable HitResult position, Map<LivingEntity, Double> affectedEntities) { // Paper - nullable hitResult
         ThrownPotion thrownPotion = (ThrownPotion) potion.getBukkitEntity();
 
         Block hitBlock = null;
         BlockFace hitFace = null;
-        if (position.getType() == HitResult.Type.BLOCK) {
+        if (position != null && position.getType() == HitResult.Type.BLOCK) { // Paper - nullable hitResult
             BlockHitResult positionBlock = (BlockHitResult) position;
             hitBlock = CraftBlock.at(potion.level(), positionBlock.getBlockPos());
             hitFace = CraftBlock.notchToBlockFace(positionBlock.getDirection());
         }
 
         org.bukkit.entity.Entity hitEntity = null;
-        if (position.getType() == HitResult.Type.ENTITY) {
+        if (position != null && position.getType() == HitResult.Type.ENTITY) { // Paper - nullable hitResult
             hitEntity = ((EntityHitResult) position).getEntity().getBukkitEntity();
         }
 
@@ -0,0 +0,0 @@ public class CraftEventFactory {
         return event;
     }
 
-    public static LingeringPotionSplashEvent callLingeringPotionSplashEvent(net.minecraft.world.entity.projectile.ThrownPotion potion, HitResult position, net.minecraft.world.entity.AreaEffectCloud cloud) {
+    public static LingeringPotionSplashEvent callLingeringPotionSplashEvent(net.minecraft.world.entity.projectile.ThrownPotion potion, @Nullable HitResult position, net.minecraft.world.entity.AreaEffectCloud cloud) { // Paper - nullable hitResult
         ThrownPotion thrownPotion = (ThrownPotion) potion.getBukkitEntity();
         AreaEffectCloud effectCloud = (AreaEffectCloud) cloud.getBukkitEntity();
 
         Block hitBlock = null;
         BlockFace hitFace = null;
-        if (position.getType() == HitResult.Type.BLOCK) {
+        if (position != null && position.getType() == HitResult.Type.BLOCK) { // Paper
             BlockHitResult positionBlock = (BlockHitResult) position;
             hitBlock = CraftBlock.at(potion.level(), positionBlock.getBlockPos());
             hitFace = CraftBlock.notchToBlockFace(positionBlock.getDirection());
         }
 
         org.bukkit.entity.Entity hitEntity = null;
-        if (position.getType() == HitResult.Type.ENTITY) {
+        if (position != null && position.getType() == HitResult.Type.ENTITY) { // Paper
             hitEntity = ((EntityHitResult) position).getEntity().getBukkitEntity();
         }
 
diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemStack.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemStack.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemStack.java
+++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemStack.java
@@ -0,0 +0,0 @@ public final class CraftItemStack extends ItemStack {
     public ItemMeta getItemMeta() {
         return CraftItemStack.getItemMeta(this.handle);
     }
+    // Paper start
+    public static void applyMetaToItem(net.minecraft.world.item.ItemStack itemStack, ItemMeta itemMeta) {
+        final CraftMetaItem.Applicator tag = new CraftMetaItem.Applicator();
+        ((CraftMetaItem) itemMeta).applyToItem(tag);
+        itemStack.applyComponents(tag.build());
+    }
 
     public static ItemMeta getItemMeta(net.minecraft.world.item.ItemStack item) {
+        return getItemMeta(item, null);
+    }
+    public static ItemMeta getItemMeta(net.minecraft.world.item.ItemStack item, org.bukkit.inventory.ItemType metaForType) {
+        // Paper end
         if (!CraftItemStack.hasItemMeta(item)) {
             return CraftItemFactory.instance().getItemMeta(CraftItemStack.getType(item));
         }
 
+        if (metaForType != null) { return ((CraftItemType<?>) metaForType).getItemMeta(item); } // Paper
         return ((CraftItemType<?>) CraftItemType.minecraftToBukkitNew(item.getItem())).getItemMeta(item);
     }
 
diff --git a/src/main/java/org/bukkit/craftbukkit/projectiles/CraftBlockProjectileSource.java b/src/main/java/org/bukkit/craftbukkit/projectiles/CraftBlockProjectileSource.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/org/bukkit/craftbukkit/projectiles/CraftBlockProjectileSource.java
+++ b/src/main/java/org/bukkit/craftbukkit/projectiles/CraftBlockProjectileSource.java
@@ -0,0 +0,0 @@ public class CraftBlockProjectileSource implements BlockProjectileSource {
 
     @Override
     public <T extends Projectile> T launchProjectile(Class<? extends T> projectile, Vector velocity) {
+        // Paper start - launchProjectile consumer
+        return this.launchProjectile(projectile, velocity, null);
+    }
+
+    @Override
+    public <T extends Projectile> T launchProjectile(Class<? extends T> projectile, Vector velocity, java.util.function.Consumer<? super T> function) {
+        // Paper end - launchProjectile consumer
         Preconditions.checkArgument(this.getBlock().getType() == Material.DISPENSER, "Block is no longer dispenser");
+
         // Copied from BlockDispenser.dispense()
         BlockSource sourceblock = new BlockSource((ServerLevel) this.dispenserBlock.getLevel(), this.dispenserBlock.getBlockPos(), this.dispenserBlock.getBlockState(), this.dispenserBlock);
         // Copied from DispenseBehaviorProjectile
@@ -0,0 +0,0 @@ public class CraftBlockProjectileSource implements BlockProjectileSource {
             item = Items.SNOWBALL;
         } else if (Egg.class.isAssignableFrom(projectile)) {
             item = Items.EGG;
-        } else if (EnderPearl.class.isAssignableFrom(projectile)) {
+        } else if (false && EnderPearl.class.isAssignableFrom(projectile)) { // Paper - more projectile API - disallow enderpearl, it is not a projectile item
             item = Items.ENDER_PEARL;
         } else if (ThrownExpBottle.class.isAssignableFrom(projectile)) {
             item = Items.EXPERIENCE_BOTTLE;
@@ -0,0 +0,0 @@ public class CraftBlockProjectileSource implements BlockProjectileSource {
                 item = Items.TIPPED_ARROW;
             } else if (SpectralArrow.class.isAssignableFrom(projectile)) {
                 item = Items.SPECTRAL_ARROW;
-            } else {
+            } else if (org.bukkit.entity.Arrow.class.isAssignableFrom(projectile)) { // Paper - more projectile API - disallow trident
                 item = Items.ARROW;
             }
         } else if (Fireball.class.isAssignableFrom(projectile)) {
-            if (AbstractWindCharge.class.isAssignableFrom(projectile)) {
+            if (org.bukkit.entity.WindCharge.class.isAssignableFrom(projectile)) { // Paper - more projectile API - only allow wind charge not breeze wind charge
                 item = Items.WIND_CHARGE;
-            } else {
+            } else if (org.bukkit.entity.SmallFireball.class.isAssignableFrom(projectile)) { // Paper - more projectile API - only allow firing fire charges.
                 item = Items.FIRE_CHARGE;
             }
         } else if (Firework.class.isAssignableFrom(projectile)) {
             item = Items.FIREWORK_ROCKET;
         }
 
-        Preconditions.checkArgument(item instanceof ProjectileItem, "Projectile not supported");
+        Preconditions.checkArgument(item instanceof ProjectileItem, "Projectile '%s' not supported", projectile.getSimpleName()); // Paper - more projectile API - include simple name in exception
 
         ItemStack itemstack = new ItemStack(item);
         ProjectileItem projectileItem = (ProjectileItem) item;
@@ -0,0 +0,0 @@ public class CraftBlockProjectileSource implements BlockProjectileSource {
         Position iposition = dispenseConfig.positionFunction().getDispensePosition(sourceblock, enumdirection);
         net.minecraft.world.entity.projectile.Projectile launch = projectileItem.asProjectile(world, iposition, itemstack, enumdirection);
 
-        if (Fireball.class.isAssignableFrom(projectile)) {
+        if (false && Fireball.class.isAssignableFrom(projectile)) { // Paper - more project API - dispensers cannot launch anything but fire charges.
             AbstractHurtingProjectile customFireball = null;
             if (WitherSkull.class.isAssignableFrom(projectile)) {
                 launch = customFireball = EntityType.WITHER_SKULL.create(world, EntitySpawnReason.TRIGGERED);
@@ -0,0 +0,0 @@ public class CraftBlockProjectileSource implements BlockProjectileSource {
             }
         }
 
-        if (launch instanceof net.minecraft.world.entity.projectile.AbstractArrow arrow) {
+        if (false && launch instanceof net.minecraft.world.entity.projectile.AbstractArrow arrow) { // Paper - more projectile API - this is set by the respective ArrowItem when constructing the projectile
             arrow.pickup = net.minecraft.world.entity.projectile.AbstractArrow.Pickup.ALLOWED;
         }
         launch.projectileSource = this;
@@ -0,0 +0,0 @@ public class CraftBlockProjectileSource implements BlockProjectileSource {
         if (velocity != null) {
             ((T) launch.getBukkitEntity()).setVelocity(velocity);
         }
+        // Paper start
+        if (function != null) {
+            function.accept((T) launch.getBukkitEntity());
+        }
+        // Paper end
 
         world.addFreshEntity(launch);
         return (T) launch.getBukkitEntity();
