Add PathfinderGoalTame for diff visibility.

src/main/java/net/minecraft/server/PathfinderGoalTame.java

@@ -0,0 +1,63 @@
+package net.minecraft.server;
+
+public class PathfinderGoalTame extends PathfinderGoal {
+
+    private EntityHorse entity;
+    private double b;
+    private double c;
+    private double d;
+    private double e;
+
+    public PathfinderGoalTame(EntityHorse entityhorse, double d0) {
+        this.entity = entityhorse;
+        this.b = d0;
+        this.a(1);
+    }
+
+    public boolean a() {
+        if (!this.entity.isTame() && this.entity.passenger != null) {
+            Vec3D vec3d = RandomPositionGenerator.a(this.entity, 5, 4);
+
+            if (vec3d == null) {
+                return false;
+            } else {
+                this.c = vec3d.c;
+                this.d = vec3d.d;
+                this.e = vec3d.e;
+                return true;
+            }
+        } else {
+            return false;
+        }
+    }
+
+    public void c() {
+        this.entity.getNavigation().a(this.c, this.d, this.e, this.b);
+    }
+
+    public boolean b() {
+        return !this.entity.getNavigation().g() && this.entity.passenger != null;
+    }
+
+    public void e() {
+        if (this.entity.aC().nextInt(50) == 0) {
+            if (this.entity.passenger instanceof EntityHuman) {
+                int i = this.entity.getTemper();
+                int j = this.entity.cq();
+
+                if (j > 0 && this.entity.aC().nextInt(j) < i) {
+                    this.entity.g((EntityHuman) this.entity.passenger);
+                    this.entity.world.broadcastEntityEffect(this.entity, (byte) 7);
+                    return;
+                }
+
+                this.entity.t(5);
+            }
+
+            this.entity.passenger.mount((Entity) null);
+            this.entity.passenger = null;
+            this.entity.cD();
+            this.entity.world.broadcastEntityEffect(this.entity, (byte) 6);
+        }
+    }
+}