collision.cpp

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#include <se2ez/core/collision.h>

using namespace se2ez;

///
/// ACM
///

void ACM::disable(const std::string &a, const std::string &b)
{
    const auto &item = (a < b) ? std::make_pair(a, b) : std::make_pair(b, a);
    disabled_.emplace(item);
}

void ACM::enable(const std::string &a, const std::string &b)
{
    const auto &item = (a < b) ? std::make_pair(a, b) : std::make_pair(b, a);
    const auto &it = disabled_.find(item);

    if (it != disabled_.end())
        disabled_.erase(it);
}

bool ACM::collide(const std::string &a, const std::string &b) const
{
    if (a != b)
    {
        const auto &item = (a < b) ? std::make_pair(a, b) : std::make_pair(b, a);
        const auto &it = disabled_.find(item);
        return it == disabled_.end();
    }

    return false;
}

void ACM::clear()
{
    disabled_.clear();
}

///
/// Collision Manager
///

void CollisionManager::SignedDistance::flip()
{
    point = point + normal;
    normal = -normal;
}

CollisionManager::CollisionManager() : acm_(std::make_shared<ACM>())
{
}

void CollisionManager::setACM(const ACMPtr &acm)
{
    acm_ = acm;
}

ACMPtr CollisionManager::getACM()
{
    return acm_;
}