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#pragma once
#include "../Entities/EntityEffect.h"
#include "../Entities/SplashPotionEntity.h"
class cItemPotionHandler:
public cItemHandler
{
typedef cItemHandler super;
int GetPotionName(short a_ItemDamage)
{
// First six bits (least significant)
return a_ItemDamage & 0x3F;
}
cEntityEffect::eType GetEntityEffectType(short a_ItemDamage)
{
// First four bits (least significant)
// Potion effect bits are different from entity effect values
// For reference: http://minecraft.gamepedia.com/Data_values#.22Potion_effect.22_bits
switch (a_ItemDamage & 0xF)
{
case 0x1: return cEntityEffect::effRegeneration;
case 0x2: return cEntityEffect::effSpeed;
case 0x3: return cEntityEffect::effFireResistance;
case 0x4: return cEntityEffect::effPoison;
case 0x5: return cEntityEffect::effInstantHealth;
case 0x6: return cEntityEffect::effNightVision;
case 0x8: return cEntityEffect::effWeakness;
case 0x9: return cEntityEffect::effStrength;
case 0xA: return cEntityEffect::effSlowness;
case 0xC: return cEntityEffect::effInstantDamage;
case 0xD: return cEntityEffect::effWaterBreathing;
case 0xE: return cEntityEffect::effInvisibility;
// No effect potions
case 0x0:
case 0x7:
case 0xB: // Will be potion of leaping in 1.8
case 0xF:
{
break;
}
}
return cEntityEffect::effNoEffect;
}
short GetEntityEffectIntensity(short a_ItemDamage)
{
// Level II potion if fifth bit (from zero) is set
return (a_ItemDamage & 0x20) ? 1 : 0;
}
int GetEntityEffectDuration(short a_ItemDamage)
{
// Base duration in ticks
int base = 0;
double TierCoeff = 1, ExtCoeff = 1, SplashCoeff = 1;
switch (GetEntityEffectType(a_ItemDamage))
{
case cEntityEffect::effRegeneration:
case cEntityEffect::effPoison:
{
base = 900;
break;
}
case cEntityEffect::effSpeed:
case cEntityEffect::effFireResistance:
case cEntityEffect::effNightVision:
case cEntityEffect::effStrength:
case cEntityEffect::effWaterBreathing:
case cEntityEffect::effInvisibility:
{
base = 3600;
break;
}
case cEntityEffect::effWeakness:
case cEntityEffect::effSlowness:
{
base = 1800;
break;
}
}
// If potion is level 2, half the duration. If not, stays the same
TierCoeff = (GetEntityEffectIntensity(a_ItemDamage) > 0) ? 0.5 : 1;
// If potion is extended, multiply duration by 8/3. If not, stays the same
// Extended potion if sixth bit (from zero) is set
ExtCoeff = (a_ItemDamage & 0x40) ? (8.0/3.0) : 1;
// If potion is splash potion, multiply duration by 3/4. If not, stays the same
SplashCoeff = IsDrinkable(a_ItemDamage) ? 1 : 0.75;
// For reference: http://minecraft.gamepedia.com/Data_values#.22Tier.22_bit
// http://minecraft.gamepedia.com/Data_values#.22Extended_duration.22_bit
// http://minecraft.gamepedia.com/Data_values#.22Splash_potion.22_bit
return (int)(base * TierCoeff * ExtCoeff * SplashCoeff);
}
public:
cItemPotionHandler():
super(E_ITEM_POTIONS)
{
}
virtual bool IsDrinkable(short a_ItemDamage) override
{
// Drinkable potion if 13th bit (from zero) is set
// For reference: http://minecraft.gamepedia.com/Potions#Data_value_table
return ((a_ItemDamage & 0x2000) != 0);
}
virtual bool OnItemUse(cWorld * a_World, cPlayer * a_Player, const cItem & a_Item, int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_Dir) override
{
short PotionDamage = a_Item.m_ItemDamage;
// Only called when potion is a splash potion
if (IsDrinkable(PotionDamage))
{
return false;
}
Vector3d Pos = a_Player->GetThrowStartPos();
Vector3d Speed = a_Player->GetLookVector() * 7;
cSplashPotionEntity *Projectile = new cSplashPotionEntity(a_Player, Pos.x, Pos.y, Pos.z, &Speed, GetEntityEffectType(PotionDamage), cEntityEffect(GetEntityEffectDuration(PotionDamage), GetEntityEffectIntensity(PotionDamage)), GetPotionName(PotionDamage));
if (Projectile == NULL)
{
return false;
}
if (!Projectile->Initialize(*a_World))
{
delete Projectile;
return false;
}
if (!a_Player->IsGameModeCreative())
{
a_Player->GetInventory().RemoveOneEquippedItem();
}
return true;
}
virtual bool EatItem(cPlayer * a_Player, cItem * a_Item) override
{
short PotionDamage = a_Item->m_ItemDamage;
// Only called when potion is a drinkable potion
if (!IsDrinkable(a_Item->m_ItemDamage))
{
return false;
}
a_Player->AddEntityEffect(GetEntityEffectType(PotionDamage), GetEntityEffectDuration(PotionDamage), GetEntityEffectIntensity(PotionDamage));
a_Player->GetInventory().RemoveOneEquippedItem();
a_Player->GetInventory().AddItem(E_ITEM_GLASS_BOTTLE);
return true;
}
};
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