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
|
/*
* Catapult.cpp, part of VCMI engine
*
* Authors: listed in file AUTHORS in main folder
*
* License: GNU General Public License v2.0 or later
* Full text of license available in license.txt file, in main folder
*
*/
#include "StdInc.h"
#include "Catapult.h"
#include "Registry.h"
#include "../ISpellMechanics.h"
#include "../../NetPacks.h"
#include "../../battle/IBattleState.h"
#include "../../battle/CBattleInfoCallback.h"
#include "../../battle/Unit.h"
#include "../../mapObjects/CGTownInstance.h"
#include "../../serializer/JsonSerializeFormat.h"
static const std::string EFFECT_NAME = "core:catapult";
namespace spells
{
namespace effects
{
VCMI_REGISTER_SPELL_EFFECT(Catapult, EFFECT_NAME);
Catapult::Catapult()
: LocationEffect(),
targetsToAttack(0)
{
}
Catapult::~Catapult() = default;
bool Catapult::applicable(Problem & problem, const Mechanics * m) const
{
auto town = m->cb->battleGetDefendedTown();
if(nullptr == town)
{
return m->adaptProblem(ESpellCastProblem::NO_APPROPRIATE_TARGET, problem);
}
if(CGTownInstance::NONE == town->fortLevel())
{
return m->adaptProblem(ESpellCastProblem::NO_APPROPRIATE_TARGET, problem);
}
if(m->isSmart() && m->casterSide != BattleSide::ATTACKER)
{
//if spell targeting is smart, then only attacker can use it
return m->adaptProblem(ESpellCastProblem::NO_APPROPRIATE_TARGET, problem);
}
const auto attackableBattleHexes = m->cb->getAttackableBattleHexes();
if(attackableBattleHexes.empty())
return m->adaptProblem(ESpellCastProblem::NO_APPROPRIATE_TARGET, problem);
return true;
}
void Catapult::apply(BattleStateProxy * battleState, RNG & rng, const Mechanics * m, const EffectTarget & /* eTarget */) const
{
//start with all destructible parts
static const std::set<EWallPart::EWallPart> possibleTargets =
{
EWallPart::KEEP,
EWallPart::BOTTOM_TOWER,
EWallPart::BOTTOM_WALL,
EWallPart::BELOW_GATE,
EWallPart::OVER_GATE,
EWallPart::UPPER_WALL,
EWallPart::UPPER_TOWER,
EWallPart::GATE
};
assert(possibleTargets.size() == EWallPart::PARTS_COUNT);
CatapultAttack ca;
ca.attacker = -1;
BattleUnitsChanged removeUnits;
for(int i = 0; i < targetsToAttack; i++)
{
//Any destructible part can be hit regardless of its HP. Multiple hit on same target is allowed.
EWallPart::EWallPart target = *RandomGeneratorUtil::nextItem(possibleTargets, rng);
auto state = m->cb->battleGetWallState(target);
if(state == EWallState::DESTROYED || state == EWallState::NONE)
continue;
CatapultAttack::AttackInfo attackInfo;
attackInfo.damageDealt = 1;
attackInfo.attackedPart = target;
attackInfo.destinationTile = m->cb->wallPartToBattleHex(target);
ca.attackedParts.push_back(attackInfo);
//removing creatures in turrets / keep if one is destroyed
BattleHex posRemove;
switch(target)
{
case EWallPart::KEEP:
posRemove = -2;
break;
case EWallPart::BOTTOM_TOWER:
posRemove = -3;
break;
case EWallPart::UPPER_TOWER:
posRemove = -4;
break;
}
if(posRemove != BattleHex::INVALID && state - attackInfo.damageDealt <= 0) //HP enum subtraction not intuitive, consider using SiegeInfo::applyDamage
{
auto all = m->cb->battleGetUnitsIf([=](const battle::Unit * unit)
{
return !unit->isGhost();
});
for(auto & elem : all)
{
if(elem->getPosition() == posRemove)
{
removeUnits.changedStacks.emplace_back(elem->unitId(), UnitChanges::EOperation::REMOVE);
break;
}
}
}
}
battleState->apply(&ca);
if(!removeUnits.changedStacks.empty())
battleState->apply(&removeUnits);
}
void Catapult::serializeJsonEffect(JsonSerializeFormat & handler)
{
//TODO: add configuration unifying with Catapult ability
handler.serializeInt("targetsToAttack", targetsToAttack);
}
}
}
|
