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/*
* IMarket.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 "IMarket.h"
#include "CArtHandler.h"
#include "CCreatureHandler.h"
#include "CGObjectInstance.h"
#include "CObjectHandler.h"
#include "../VCMI_Lib.h"
VCMI_LIB_NAMESPACE_BEGIN
bool IMarket::allowsTrade(const EMarketMode mode) const
{
return vstd::contains(availableModes(), mode);
}
bool IMarket::getOffer(int id1, int id2, int &val1, int &val2, EMarketMode mode) const
{
switch(mode)
{
case EMarketMode::RESOURCE_RESOURCE:
{
double effectiveness = std::min((getMarketEfficiency() + 1.0) / 20.0, 0.5);
double r = VLC->objh->resVals[id1]; //value of given resource
double g = VLC->objh->resVals[id2] / effectiveness; //value of wanted resource
if(r>g) //if given resource is more expensive than wanted
{
val2 = static_cast<int>(ceil(r / g));
val1 = 1;
}
else //if wanted resource is more expensive
{
val1 = static_cast<int>((g / r) + 0.5);
val2 = 1;
}
}
break;
case EMarketMode::CREATURE_RESOURCE:
{
const double effectivenessArray[] = {0.0, 0.3, 0.45, 0.50, 0.65, 0.7, 0.85, 0.9, 1.0};
double effectiveness = effectivenessArray[std::min(getMarketEfficiency(), 8)];
double r = VLC->creatures()->getByIndex(id1)->getRecruitCost(EGameResID::GOLD); //value of given creature in gold
double g = VLC->objh->resVals[id2] / effectiveness; //value of wanted resource
if(r>g) //if given resource is more expensive than wanted
{
val2 = static_cast<int>(ceil(r / g));
val1 = 1;
}
else //if wanted resource is more expensive
{
val1 = static_cast<int>((g / r) + 0.5);
val2 = 1;
}
}
break;
case EMarketMode::RESOURCE_PLAYER:
val1 = 1;
val2 = 1;
break;
case EMarketMode::RESOURCE_ARTIFACT:
{
double effectiveness = std::min((getMarketEfficiency() + 3.0) / 20.0, 0.6);
double r = VLC->objh->resVals[id1]; //value of offered resource
double g = VLC->artifacts()->getByIndex(id2)->getPrice() / effectiveness; //value of bought artifact in gold
if(id1 != 6) //non-gold prices are doubled
r /= 2;
val1 = std::max(1, static_cast<int>((g / r) + 0.5)); //don't sell arts for less than 1 resource
val2 = 1;
}
break;
case EMarketMode::ARTIFACT_RESOURCE:
{
double effectiveness = std::min((getMarketEfficiency() + 3.0) / 20.0, 0.6);
double r = VLC->artifacts()->getByIndex(id1)->getPrice() * effectiveness;
double g = VLC->objh->resVals[id2];
// if(id2 != 6) //non-gold prices are doubled
// r /= 2;
val1 = 1;
val2 = std::max(1, static_cast<int>((r / g) + 0.5)); //at least one resource is given in return
}
break;
case EMarketMode::CREATURE_EXP:
{
val1 = 1;
val2 = (CreatureID(id1).toEntity(VLC)->getAIValue() / 40) * 5;
}
break;
case EMarketMode::ARTIFACT_EXP:
{
val1 = 1;
int givenClass = ArtifactID(id1).toArtifact()->getArtClassSerial();
if(givenClass < 0 || givenClass > 3)
{
val2 = 0;
return false;
}
static constexpr int expPerClass[] = {1000, 1500, 3000, 6000};
val2 = expPerClass[givenClass];
}
break;
default:
assert(0);
return false;
}
return true;
}
int IMarket::availableUnits(const EMarketMode mode, const int marketItemSerial) const
{
switch(mode)
{
case EMarketMode::RESOURCE_RESOURCE:
case EMarketMode::ARTIFACT_RESOURCE:
case EMarketMode::CREATURE_RESOURCE:
return -1;
default:
return 1;
}
}
IMarket::IMarket()
:altarArtifactsStorage(std::make_unique<CArtifactSetAltar>())
{
}
IMarket::~IMarket() = default;
CArtifactSet * IMarket::getArtifactsStorage() const
{
if (availableModes().count(EMarketMode::ARTIFACT_EXP))
return altarArtifactsStorage.get();
else
return nullptr;
}
std::vector<TradeItemBuy> IMarket::availableItemsIds(const EMarketMode mode) const
{
std::vector<TradeItemBuy> ret;
switch(mode)
{
case EMarketMode::RESOURCE_RESOURCE:
case EMarketMode::ARTIFACT_RESOURCE:
case EMarketMode::CREATURE_RESOURCE:
for(const auto & res : GameResID::ALL_RESOURCES())
ret.push_back(res);
}
return ret;
}
VCMI_LIB_NAMESPACE_END
|
