metaforce/Runtime/World/CHUDBillboardEffect.cpp

#include "CHUDBillboardEffect.hpp"
#include "TCastTo.hpp"
#include "CStateManager.hpp"
#include "Camera/CGameCamera.hpp"
#include "GameGlobalObjects.hpp"
#include "Graphics/CBooRenderer.hpp"
#include "World/CPlayer.hpp"
#include "World/CWorld.hpp"

namespace urde
{

u32 CHUDBillboardEffect::g_IndirectTexturedBillboardCount = 0;
u32 CHUDBillboardEffect::g_BillboardCount = 0;

CHUDBillboardEffect::CHUDBillboardEffect(const std::experimental::optional<TToken<CGenDescription>>& particle,
                                         const std::experimental::optional<TToken<CElectricDescription>>& electric,
                                         TUniqueId uid, bool active, std::string_view name, float dist,
                                         const zeus::CVector3f& scale0, const zeus::CColor& color,
                                         const zeus::CVector3f& scale1, const zeus::CVector3f& translation)
: CEffect(uid, CEntityInfo(kInvalidAreaId, CEntity::NullConnectionList), active, name, zeus::CTransform::Identity())
{
    xec_translation = translation;
    xec_translation.y += dist;
    xf8_localScale = scale1 * scale0;
    x104_24_renderAsParticleGen = true;
    x104_25_enableRender = false;
    x104_26_isElementGen = false;
    x104_27_runIndefinitely = false;

    if (particle)
    {
        x104_26_isElementGen = true;
        xe8_generator = std::make_unique<CElementGen>(*particle);
        if (static_cast<CElementGen&>(*xe8_generator).IsIndirectTextured())
            ++g_IndirectTexturedBillboardCount;
    }
    else
    {
        xe8_generator = std::make_unique<CParticleElectric>(*electric);
    }
    ++g_BillboardCount;
    xe8_generator->SetModulationColor(color);
    xe8_generator->SetLocalScale(xf8_localScale);
}

CHUDBillboardEffect::~CHUDBillboardEffect()
{
    --g_BillboardCount;
    if (xe8_generator->Get4CharId() == FOURCC('PART'))
        if (static_cast<CElementGen&>(*xe8_generator).IsIndirectTextured())
            --g_IndirectTexturedBillboardCount;
}

void CHUDBillboardEffect::Accept(IVisitor& visitor) { visitor.Visit(this); }

float CHUDBillboardEffect::CalcGenRate()
{
    float f1;
    if (g_BillboardCount + g_IndirectTexturedBillboardCount <= 4)
        f1 = 0.f;
    else
        f1 = g_BillboardCount * 0.2f + g_IndirectTexturedBillboardCount * 0.1f;
    return 1.f - std::min(f1, 0.8f);
}

void CHUDBillboardEffect::Think(float dt, CStateManager& mgr)
{
    if (GetActive())
    {
        mgr.SetActorAreaId(*this, mgr.GetWorld()->GetCurrentAreaId());
        float oldGenRate = xe8_generator->GetGeneratorRate();
        xe8_generator->SetGeneratorRate(oldGenRate * CalcGenRate());
        xe8_generator->Update(dt);
        xe8_generator->SetGeneratorRate(oldGenRate);
        if (!x104_27_runIndefinitely)
        {
            x108_timeoutTimer += dt;
            if (x108_timeoutTimer > 30.f)
            {
                mgr.FreeScriptObject(GetUniqueId());
                return;
            }
        }
        if (xe8_generator->IsSystemDeletable())
            mgr.FreeScriptObject(GetUniqueId());
    }
}

void CHUDBillboardEffect::AddToRenderer(const zeus::CFrustum& frustum, const CStateManager& mgr) const
{
    if (x104_25_enableRender && x104_24_renderAsParticleGen)
    {
        g_Renderer->AddParticleGen(*xe8_generator);
    }
}

void CHUDBillboardEffect::PreRender(CStateManager& mgr, const zeus::CFrustum& frustum)
{
    if (mgr.GetPlayer().GetCameraState() == CPlayer::EPlayerCameraState::FirstPerson)
    {
        zeus::CTransform camXf = mgr.GetCameraManager()->GetCurrentCameraTransform(mgr);
        xe8_generator->SetGlobalTranslation(camXf * xec_translation);
        xe8_generator->SetGlobalOrientation(camXf);
        x104_25_enableRender = true;
    }
    else
    {
        x104_25_enableRender = false;
    }
    x104_24_renderAsParticleGen = !mgr.RenderLast(GetUniqueId());
}

void CHUDBillboardEffect::Render(const CStateManager& mgr) const
{
    if (x104_25_enableRender && !x104_24_renderAsParticleGen)
    {
        xe8_generator->Render();
    }
}

float CHUDBillboardEffect::GetNearClipDistance(CStateManager& mgr)
{
    return mgr.GetCameraManager()->GetCurrentCamera(mgr)->GetNearClipDistance() + 0.01f;
}

zeus::CVector3f CHUDBillboardEffect::GetScaleForPOV(CStateManager& mgr)
{
    return {0.155f, 1.f, 0.155f};
}

}