PaperMC/nms-patches/EntityFireball.patch

--- a/net/minecraft/server/EntityFireball.java
+++ b/net/minecraft/server/EntityFireball.java
@@ -2,6 +2,8 @@
 
 import java.util.List;
 
+import org.bukkit.craftbukkit.event.CraftEventFactory; // CraftBukkit
+
 public abstract class EntityFireball extends Entity {
 
     private int e = -1;
@@ -15,6 +17,8 @@
     public double dirX;
     public double dirY;
     public double dirZ;
+    public float bukkitYield = 1; // CraftBukkit
+    public boolean isIncendiary = true; // CraftBukkit
 
     public EntityFireball(World world) {
         super(world);
@@ -38,10 +42,17 @@
     public EntityFireball(World world, EntityLiving entityliving, double d0, double d1, double d2) {
         super(world);
         this.shooter = entityliving;
+        this.projectileSource = (org.bukkit.entity.LivingEntity) entityliving.getBukkitEntity(); // CraftBukkit
         this.setSize(1.0F, 1.0F);
         this.setPositionRotation(entityliving.locX, entityliving.locY, entityliving.locZ, entityliving.yaw, entityliving.pitch);
         this.setPosition(this.locX, this.locY, this.locZ);
         this.motX = this.motY = this.motZ = 0.0D;
+        // CraftBukkit start - Added setDirection method
+        this.setDirection(d0, d1, d2);
+    }
+
+    public void setDirection(double d0, double d1, double d2) {
+        // CraftBukkit end
         d0 += this.random.nextGaussian() * 0.4D;
         d1 += this.random.nextGaussian() * 0.4D;
         d2 += this.random.nextGaussian() * 0.4D;
@@ -117,6 +128,12 @@
 
             if (movingobjectposition != null) {
                 this.a(movingobjectposition);
+
+                // CraftBukkit start - Fire ProjectileHitEvent
+                if (this.dead) {
+                    CraftEventFactory.callProjectileHitEvent(this);
+                }
+                // CraftBukkit end
             }
 
             this.locX += this.motX;
@@ -181,6 +198,8 @@
 
         nbttagcompound.setString("inTile", minecraftkey == null ? "" : minecraftkey.toString());
         nbttagcompound.setByte("inGround", (byte) (this.i ? 1 : 0));
+        // CraftBukkit - Fix direction being mismapped to invalid variables
+        nbttagcompound.set("power", this.a(new double[] { this.dirX, this.dirY, this.dirZ}));
         nbttagcompound.set("direction", this.a(new double[] { this.motX, this.motY, this.motZ}));
     }
 
@@ -195,12 +214,20 @@
         }
 
         this.i = nbttagcompound.getByte("inGround") == 1;
-        if (nbttagcompound.hasKeyOfType("direction", 9)) {
+        // CraftBukkit start - direction -> power
+        if (nbttagcompound.hasKeyOfType("power", 9)) {
+            NBTTagList nbttaglist = nbttagcompound.getList("power", 6);
+
+            this.dirX = nbttaglist.d(0);
+            this.dirY = nbttaglist.d(1);
+            this.dirZ = nbttaglist.d(2);
+        } else if (nbttagcompound.hasKeyOfType("direction", 9)) {
             NBTTagList nbttaglist = nbttagcompound.getList("direction", 6);
 
             this.motX = nbttaglist.d(0);
             this.motY = nbttaglist.d(1);
             this.motZ = nbttaglist.d(2);
+        // CraftBukkit end
         } else {
             this.die();
         }
@@ -221,6 +248,11 @@
         } else {
             this.ac();
             if (damagesource.getEntity() != null) {
+                // CraftBukkit start
+                if (CraftEventFactory.handleNonLivingEntityDamageEvent(this, damagesource, f)) {
+                    return false;
+                }
+                // CraftBukkit end
                 Vec3D vec3d = damagesource.getEntity().ap();
 
                 if (vec3d != null) {
@@ -234,6 +266,7 @@
 
                 if (damagesource.getEntity() instanceof EntityLiving) {
                     this.shooter = (EntityLiving) damagesource.getEntity();
+                    this.projectileSource = (org.bukkit.projectiles.ProjectileSource) this.shooter.getBukkitEntity();
                 }
 
                 return true;