summaryrefslogtreecommitdiffstats
path: root/src/Items/ItemPotion.h
blob: c2441fa48b133d1747e6fd49b6833d897fd2ae2c (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163

#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::effRegeneration;
			case 2:  return cEntityEffect::effSpeed;
			case 3:  return cEntityEffect::effFireResistance;
			case 4:  return cEntityEffect::effPoison;
			case 5:  return cEntityEffect::effInstantHealth;
			case 6:  return cEntityEffect::effNightVision;
			case 8:  return cEntityEffect::effWeakness;
			case 9:  return cEntityEffect::effStrength;
			case 10: return cEntityEffect::effSlowness;
			case 12: return cEntityEffect::effInstantDamage;
			case 13: return cEntityEffect::effWaterBreathing;
			case 14: return cEntityEffect::effInvisibility;
			
			// No effect potions
			case 0:
			case 7:
			case 11:
			case 15:
			{
				break;
			}
		}
		
		return cEntityEffect::effNoEffect;
	}
	
	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::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
		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;
	}
	
public:
	cItemPotionHandler():
	super(E_ITEM_POTIONS)
	{
	}
	
	virtual bool IsDrinkable(short a_ItemDamage) override
	{
		// Drinkable potion if 13th bit is set
		// For reference: http://minecraft.gamepedia.com/Potions#Data_value_table
		return a_ItemDamage & 8192;
	}
	
	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 Pos = a_Player->GetThrowStartPos();
		Vector3d Speed = a_Player->GetLookVector() * 7;
		
		short potion_damage = a_Item.m_ItemDamage;
		cSplashPotionEntity *Projectile = new cSplashPotionEntity(a_Player, Pos.x, Pos.y, Pos.z, &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;
	}
};