[svn] Add Unit::IsWithinCombatDist function to check melee range and spell range (now range is related to the attacker's bounding_radius and target's combat_reach, not sure if both should be combat_reach).

--HG--
branch : trunk

src/bindings/scripts/include/sc_creature.cpp

@@ -133,7 +133,7 @@ void ScriptedAI::DoMeleeAttackIfReady()
     if( m_creature->isAttackReady() && !m_creature->IsNonMeleeSpellCasted(false))
     {
         //If we are within range melee the target
-        if( m_creature->IsWithinDistInMap(m_creature->getVictim(), ATTACK_DISTANCE))
+        if( m_creature->IsWithinCombatDist(m_creature->getVictim(), ATTACK_DISTANCE))
         {
             m_creature->AttackerStateUpdate(m_creature->getVictim());
             m_creature->resetAttackTimer();

src/game/Player.cpp

@@ -1056,7 +1056,7 @@ void Player::Update( uint32 p_time )
 
             if (isAttackReady(BASE_ATTACK))
             {
-                if(!IsWithinDistInMap(pVictim, pldistance))
+                if(!IsWithinCombatDist(pVictim, pldistance))
                 {
                     setAttackTimer(BASE_ATTACK,100);
                     if(m_swingErrorMsg != 1)                // send single time (client auto repeat)
@@ -1093,7 +1093,7 @@ void Player::Update( uint32 p_time )
 
             if ( haveOffhandWeapon() && isAttackReady(OFF_ATTACK))
             {
-                if(!IsWithinDistInMap(pVictim, pldistance))
+                if(!IsWithinCombatDist(pVictim, pldistance))
                 {
                     setAttackTimer(OFF_ATTACK,100);
                 }

src/game/Spell.cpp

@@ -4337,10 +4337,9 @@ uint8 Spell::CheckRange(bool strict)
     if(target && target != m_caster)
     {
         // distance from target center in checks
-        float dist = m_caster->GetDistance(target->GetPositionX(),target->GetPositionY(),target->GetPositionZ());
-        if(dist > max_range)
+        if(!m_caster->IsWithinCombatDist(target, max_range))
             return SPELL_FAILED_OUT_OF_RANGE;               //0x5A;
-        if(dist < min_range)
+        if(min_range && m_caster->IsWithinCombatDist(target, min_range)) // skip this check if min_range = 0
             return SPELL_FAILED_TOO_CLOSE;
         if( m_caster->GetTypeId() == TYPEID_PLAYER &&
             (m_spellInfo->FacingCasterFlags & SPELL_FACING_FLAG_INFRONT) && !m_caster->HasInArc( M_PI, target ) )

src/game/Unit.cpp

@@ -408,6 +408,21 @@ bool Unit::canReachWithAttack(Unit *pVictim) const
     return IsWithinDistInMap(pVictim, reach);
 }
 
+bool Unit::IsWithinCombatDist(Unit *obj, float dist2compare) const
+{
+    if (!obj || !IsInMap(obj)) return false;
+
+    float dx = GetPositionX() - obj->GetPositionX();
+    float dy = GetPositionY() - obj->GetPositionY();
+    float dz = GetPositionZ() - obj->GetPositionZ();
+    float distsq = dx*dx + dy*dy + dz*dz;
+    //not sure here, or combatreach + combatreach?
+    float sizefactor = GetObjectSize() + obj->GetFloatValue(UNIT_FIELD_COMBATREACH);
+    float maxdist = dist2compare + sizefactor;
+
+    return distsq < maxdist * maxdist;
+}
+
 void Unit::RemoveSpellsCausingAura(AuraType auraType)
 {
     if (auraType >= TOTAL_AURAS) return;

src/game/Unit.h

@@ -718,6 +718,7 @@ class TRINITY_DLL_SPEC Unit : public WorldObject
         bool isAttackReady(WeaponAttackType type = BASE_ATTACK) const { return m_attackTimer[type] == 0; }
         bool haveOffhandWeapon() const;
         bool canReachWithAttack(Unit *pVictim) const;
+        bool IsWithinCombatDist(Unit *obj, float dist2compare) const;
         uint32 m_extraAttacks;
 
         void _addAttacker(Unit *pAttacker)                  // must be called only from Unit::Attack(Unit*)