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#pragma once
#include "../Entities/EntityEffects.h"
#include "../Entities/SplashPotionEntity.h"
class cItemPotionHandler:
public cItemHandler
{
typedef cItemHandler super;
int GetPotionName(short a_ItemDamage)
{
return a_ItemDamage & 63;
}
cEntityEffect::eType GetEntityEffectType(short a_ItemDamage)
{
// Potion effect bits are different from entity effect values
// For reference: http://minecraft.gamepedia.com/Data_values#.22Potion_effect.22_bits
switch (a_ItemDamage & 15)
{
case 1: return cEntityEffect::efRegeneration;
case 2: return cEntityEffect::efSpeed;
case 3: return cEntityEffect::efFireResistance;
case 4: return cEntityEffect::efPoison;
case 5: return cEntityEffect::efInstantHealth;
case 6: return cEntityEffect::efNightVision;
case 8: return cEntityEffect::efWeakness;
case 9: return cEntityEffect::efStrength;
case 10: return cEntityEffect::efSlowness;
case 12: return cEntityEffect::efInstantDamage;
case 13: return cEntityEffect::efWaterBreathing;
case 14: return cEntityEffect::efInvisibility;
// No effect potions
case 0:
case 7:
case 11:
case 15:
{
break;
}
}
return cEntityEffect::efNoEffect;
}
short GetEntityEffectIntensity(short a_ItemDamage)
{
// Level II potion if fifth bit is set
if (a_ItemDamage & 32) return 1;
else return 0;
}
int GetEntityEffectDuration(short a_ItemDamage)
{
// Base duration in ticks
int base = 0;
double tier_multi = 1, ext_multi = 1, splash_multi = 1;
switch (GetEntityEffectType(a_ItemDamage))
{
case cEntityEffect::efRegeneration:
case cEntityEffect::efPoison:
{
base = 900;
break;
}
case cEntityEffect::efSpeed:
case cEntityEffect::efFireResistance:
case cEntityEffect::efNightVision:
case cEntityEffect::efStrength:
case cEntityEffect::efWaterBreathing:
case cEntityEffect::efInvisibility:
{
base = 3600;
break;
}
case cEntityEffect::efWeakness:
case cEntityEffect::efSlowness:
{
base = 1800;
break;
}
}
// If potion is level 2, half the duration. If not, stays the same
tier_multi = 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 is set
ext_multi = a_ItemDamage & 64 ? (8.0/3.0) : 1;
// If potion is splash potion, multiply duration by 3/4. If not, stays the same
splash_multi = !IsDrinkable(a_ItemDamage) ? 0.75 : 1;
// 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 base * tier_multi * ext_multi * splash_multi;
}
bool IsDrinkable(short a_ItemDamage)
{
// Drinkable potion if 13th bit is set
// For reference: http://minecraft.gamepedia.com/Potions#Data_value_table
return a_ItemDamage & 8192;
}
public:
cItemPotionHandler():
super(E_ITEM_POTIONS)
{
}
virtual bool IsDrinkable(const cItem * a_Item) override
{
return IsDrinkable(a_Item->m_ItemDamage);
}
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
{
Vector3d Speed = a_Player->GetLookVector() * 10;
short potion_damage = a_Item.m_ItemDamage;
cProjectileEntity * Projectile = new cSplashPotionEntity(a_Player,
(double)a_BlockX,
(double)a_BlockY,
(double)a_BlockZ,
&Speed,
GetEntityEffectType(potion_damage),
cEntityEffect(GetEntityEffectDuration(potion_damage),
GetEntityEffectIntensity(potion_damage),
a_Player),
GetPotionName(potion_damage));
if (Projectile == NULL)
{
return false;
}
if (!Projectile->Initialize(*a_World))
{
delete Projectile;
return false;
}
if (!a_Player->IsGameModeCreative())
{
a_Player->GetInventory().RemoveOneEquippedItem();
}
// Called when potion is a splash potion
return true;
}
virtual bool EatItem(cPlayer * a_Player, cItem * a_Item) override
{
// Called when potion is a drinkable potion
short potion_damage = a_Item->m_ItemDamage;
a_Player->AddEntityEffect(GetEntityEffectType(potion_damage),
cEntityEffect(GetEntityEffectDuration(potion_damage),
GetEntityEffectIntensity(potion_damage),
a_Player));
a_Player->GetInventory().RemoveOneEquippedItem();
a_Player->GetInventory().AddItem(E_ITEM_GLASS_BOTTLE);
return true;
}
};
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