From b02a81678c22b00955bc3b2b87ceed55027bb35a Mon Sep 17 00:00:00 2001
From: Tiger Wang <ziwei.tiger@hotmail.co.uk>
Date: Sun, 22 Dec 2013 20:04:17 +0000
Subject: Implemented knockback and critical hit

---
 src/Entities/Entity.cpp | 25 +++++++++++++++++++++----
 1 file changed, 21 insertions(+), 4 deletions(-)

diff --git a/src/Entities/Entity.cpp b/src/Entities/Entity.cpp
index 8fcdcc82f..0f5ed7262 100644
--- a/src/Entities/Entity.cpp
+++ b/src/Entities/Entity.cpp
@@ -13,6 +13,7 @@
 #include "../Bindings/PluginManager.h"
 #include "../Tracer.h"
 #include "Minecart.h"
+#include "Player.h"
 
 
 
@@ -239,10 +240,14 @@ void cEntity::TakeDamage(eDamageType a_DamageType, cEntity * a_Attacker, int a_R
 	TDI.Attacker = a_Attacker;
 	TDI.RawDamage = a_RawDamage;
 	TDI.FinalDamage = a_FinalDamage;
-	Vector3d Heading;
-	Heading.x = sin(GetRotation());
-	Heading.y = 0.4;  // TODO: adjust the amount of "up" knockback when testing
-	Heading.z = cos(GetRotation());
+	
+	Vector3d Heading(0, 0, 0);
+	if (a_Attacker != NULL)
+	{
+		Heading = a_Attacker->GetLookVector() * (a_Attacker->IsSprinting() ? 10 : 8);
+	}
+	Heading.y += 3;
+
 	TDI.Knockback = Heading * a_KnockbackAmount;
 	DoTakeDamage(TDI);
 }
@@ -297,6 +302,16 @@ void cEntity::DoTakeDamage(TakeDamageInfo & a_TDI)
 		return;
 	}
 
+	if ((a_TDI.Attacker != NULL) && (a_TDI.Attacker->IsPlayer()))
+	{
+		// IsOnGround() only is true if the player is moving downwards
+		if (!((cPlayer *)a_TDI.Attacker)->IsOnGround()) // TODO: Better damage increase, and check for enchantments (and use magic critical instead of plain)
+		{
+			a_TDI.FinalDamage + 2;
+			m_World->BroadcastEntityAnimation(*this, 4); // Critical hit
+		}
+	}
+
 	m_Health -= (short)a_TDI.FinalDamage;
 	
 	// TODO: Apply damage to armor
@@ -306,6 +321,8 @@ void cEntity::DoTakeDamage(TakeDamageInfo & a_TDI)
 		m_Health = 0;
 	}
 
+	AddSpeed(a_TDI.Knockback * 3);
+
 	m_World->BroadcastEntityStatus(*this, ENTITY_STATUS_HURT);
 
 	if (m_Health <= 0)
-- 
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