CWE-ou-minkata/Sources/Plasma/PubUtilLib/plSurface/plGrassShaderMod.cpp

/*==LICENSE==*

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*==LICENSE==*/
#include "plGrassShaderMod.h"

#include "hsTimer.h"
#include "hsResMgr.h"
#include "plgDispatch.h"

#include "pnKeyedObject/plUoid.h"

//#include "pnSceneObject/plDrawInterface.h"

#include "pnMessage/plObjRefMsg.h"
#include "pnMessage/plTimeMsg.h"
#include "plMessage/plMatRefMsg.h"
#include "plMessage/plAgeLoadedMsg.h"
#include "plMessage/plLayRefMsg.h"

#include "plDrawable/plAccessGeometry.h"
#include "plDrawable/plAccessSpan.h"
#include "plDrawable/plAccessVtxSpan.h"

#include "plSurface/hsGMaterial.h"
#include "plSurface/plShader.h"
#include "plSurface/plLayer.h"

void plGrassWave::Write(hsStream *s)
{
    s->WriteLEScalar(fDistX);
    s->WriteLEScalar(fDistY);
    s->WriteLEScalar(fDistZ);
    s->WriteLEScalar(fDirX);
    s->WriteLEScalar(fDirY);
    s->WriteLEScalar(fSpeed);
}

void plGrassWave::Read(hsStream *s)
{
    fDistX = s->ReadLEScalar();
    fDistY = s->ReadLEScalar();
    fDistZ = s->ReadLEScalar();
    fDirX = s->ReadLEScalar();
    fDirY = s->ReadLEScalar();
    fSpeed = s->ReadLEScalar();
}

/////////////////////////////////////////////////////////////////////////////////////////////

plGrassShaderMod::~plGrassShaderMod()
{
    plgDispatch::Dispatch()->UnRegisterForExactType(plEvalMsg::Index(), GetKey());
    plgDispatch::Dispatch()->UnRegisterForExactType(plInitialAgeStateLoadedMsg::Index(), GetKey());
    plgDispatch::Dispatch()->UnRegisterForExactType(plAgeLoadedMsg::Index(), GetKey());
}

void plGrassShaderMod::ResetWaves()
{
    int i;
    for (i = 0; i < kNumWaves; i++)
    {
        fWaves[i].fDistX = 0.F;
        fWaves[i].fDistY = 0.F;
        fWaves[i].fDistZ = 0.F;
        fWaves[i].fDirX = 0.F;
        fWaves[i].fDirY = 0.F;
        fWaves[i].fSpeed = 0.F;
    }
    RefreshWaves();
}

void plGrassShaderMod::RefreshWaves()
{
    IRefreshWaves(fVShader);
}

void plGrassShaderMod::IRefreshWaves(plShader *vShader)
{
    // Dynamic params, set by artist
    vShader->SetVector(plGrassVS::kWaveDistX, fWaves[0].fDistX, fWaves[1].fDistX, fWaves[2].fDistX, fWaves[3].fDistX);
    vShader->SetVector(plGrassVS::kWaveDistY, fWaves[0].fDistY, fWaves[1].fDistY, fWaves[2].fDistY, fWaves[3].fDistY);
    vShader->SetVector(plGrassVS::kWaveDistZ, fWaves[0].fDistZ, fWaves[1].fDistZ, fWaves[2].fDistZ, fWaves[3].fDistZ);
    vShader->SetVector(plGrassVS::kWaveDirX, fWaves[0].fDirX, fWaves[1].fDirX, fWaves[2].fDirX, fWaves[3].fDirX);
    vShader->SetVector(plGrassVS::kWaveDirY, fWaves[0].fDirY, fWaves[1].fDirY, fWaves[2].fDirY, fWaves[3].fDirY);
    vShader->SetVector(plGrassVS::kWaveSpeed, fWaves[0].fSpeed, fWaves[1].fSpeed, fWaves[2].fSpeed, fWaves[3].fSpeed);
}

void plGrassShaderMod::AddTarget(plSceneObject *object)
{
    fTarget = object;
}

void plGrassShaderMod::RemoveTarget(plSceneObject *object)
{
    fTarget = nil;
}

bool plGrassShaderMod::MsgReceive(plMessage *msg)
{
    plGenRefMsg* refMsg = plGenRefMsg::ConvertNoRef(msg);
    if (refMsg)
    {
        if (refMsg->GetContext() & (plRefMsg::kOnCreate | plRefMsg::kOnRequest | plRefMsg::kOnReplace))
        {
            switch (refMsg->fType)
            {
            case kRefGrassVS:
                fVShader = plShader::ConvertNoRef(refMsg->GetRef());
                break;
            case kRefGrassPS:
                fPShader = plShader::ConvertNoRef(refMsg->GetRef());
                break;
            case kRefMaterial:
                fMaterial = hsGMaterial::ConvertNoRef(refMsg->GetRef());
                break;
            default:
                break;
            }
        }
        else
        {   
            switch (refMsg->fType)
            {
            case kRefGrassVS:
                fVShader = nil;
                break;
            case kRefGrassPS:
                fPShader = nil;
                break;
            case kRefMaterial:
                fMaterial = nil;
                break;
            default:
                break;
            }
        }
        return true;
    }

    plAgeLoadedMsg* ageLoaded = plAgeLoadedMsg::ConvertNoRef(msg);
    if( (ageLoaded && ageLoaded->fLoaded) || plInitialAgeStateLoadedMsg::ConvertNoRef(msg) )
    {
        ISetupShaders();
        return true;
    }

    return plModifier::MsgReceive(msg);
}

void plGrassShaderMod::Write(hsStream *stream, hsResMgr *mgr)
{
    plModifier::Write(stream, mgr);

    mgr->WriteKey(stream, fMaterial ? fMaterial->GetKey() : nil);

    int i;
    for (i = 0; i < kNumWaves; i++)
        fWaves[i].Write(stream);
}

void plGrassShaderMod::Read(hsStream *stream, hsResMgr *mgr)
{
    plModifier::Read(stream, mgr);

    mgr->ReadKeyNotifyMe(stream, new plGenRefMsg(GetKey(), plRefMsg::kOnRequest, 0, kRefMaterial), plRefFlags::kActiveRef);

    int i;
    for (i = 0; i < kNumWaves; i++)
        fWaves[i].Read(stream);

    plgDispatch::Dispatch()->RegisterForExactType(plEvalMsg::Index(), GetKey());
    plgDispatch::Dispatch()->RegisterForExactType(plInitialAgeStateLoadedMsg::Index(), GetKey());
    plgDispatch::Dispatch()->RegisterForExactType(plAgeLoadedMsg::Index(), GetKey());
}

bool plGrassShaderMod::IEval(double secs, float del, uint32_t dirty)
{
    if (fVShader)
    {
        fVShader->SetVector(plGrassVS::kAppConsts, float(hsTimer::GetSysSeconds()), 0.f, 0.f, 0.f);
    }

    return true;
}

void plGrassShaderMod::ISetupShaders()
{
    if (!fVShader)
    {
        plShader* vShader = new plShader;
        plString buff = plFormat("{}_GrassVS", GetKey()->GetName());
        hsgResMgr::ResMgr()->NewKey(buff, vShader, GetKey()->GetUoid().GetLocation());
        vShader->SetIsPixelShader(false);
        vShader->SetInputFormat(1);
        vShader->SetOutputFormat(0);

        vShader->SetNumConsts(plGrassVS::kNumConsts);
        vShader->SetVector(plGrassVS::kNumericConsts, 0.f, 0.5f, 1.f, 2.f);
        vShader->SetVector(plGrassVS::kPiConsts, 1.f / (8.f*M_PI*4.f*4.f), M_PI/2.f, M_PI, M_PI*2.f);
        vShader->SetVector(plGrassVS::kSinConsts, -1.f/6.f, 1.f/120.f, -1.f/5040.f, 1.f/362880.f);

        IRefreshWaves(vShader);

        vShader->SetNumPipeConsts(1);
        vShader->SetPipeConst(0, plPipeConst::kLocalToNDC, plGrassVS::kLocalToNDC);

        vShader->SetDecl(plShaderTable::Decl(plShaderID::vs_GrassShader));
        hsgResMgr::ResMgr()->SendRef(vShader->GetKey(), new plGenRefMsg(GetKey(), plRefMsg::kOnRequest, 0, kRefGrassVS), plRefFlags::kActiveRef);
    }

    if (!fPShader)
    {
        plShader* pShader = new plShader;
        plString buff = plFormat("{}_GrassPS", GetKey()->GetName());
        hsgResMgr::ResMgr()->NewKey(buff, pShader, GetKey()->GetUoid().GetLocation());
        pShader->SetIsPixelShader(true);
        pShader->SetNumConsts(0);
        pShader->SetInputFormat(0);
        pShader->SetOutputFormat(0);
        pShader->SetDecl(plShaderTable::Decl(plShaderID::ps_GrassShader));
        hsgResMgr::ResMgr()->SendRef(pShader->GetKey(), new plGenRefMsg(GetKey(), plRefMsg::kOnRequest, 0, kRefGrassPS), plRefFlags::kActiveRef);
    }

    plLayer* layer = plLayer::ConvertNoRef(fMaterial->GetLayer(0)->BottomOfStack());
    if (layer && (layer->GetVertexShader() != fVShader))
    {
        plLayRefMsg* refMsg = new plLayRefMsg(layer->GetKey(), plRefMsg::kOnCreate, 0, plLayRefMsg::kVertexShader); 
        hsgResMgr::ResMgr()->SendRef(fVShader->GetKey(), refMsg, plRefFlags::kActiveRef);
    }
    if (layer && (layer->GetPixelShader() != fPShader))
    {
        plLayRefMsg* refMsg = new plLayRefMsg(layer->GetKey(), plRefMsg::kOnCreate, 0, plLayRefMsg::kPixelShader);  
        hsgResMgr::ResMgr()->SendRef(fPShader->GetKey(), refMsg, plRefFlags::kActiveRef);
    }
}