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Diffstat (limited to 'src/Items/ItemPotion.h')
| -rw-r--r-- | src/Items/ItemPotion.h | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/src/Items/ItemPotion.h b/src/Items/ItemPotion.h new file mode 100644 index 000000000..e34b251aa --- /dev/null +++ b/src/Items/ItemPotion.h @@ -0,0 +1,137 @@ + +#pragma once + +#include "../Entities/EntityEffects.h" + +class cItemPotionHandler: +public cItemHandler +{ + typedef cItemHandler super; + + 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 + { + // 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; + } +}; |