CWE-ou-minkata/Sources/Plasma/PubUtilLib/plGRenderProcs/hsSfxGlobalShade.cpp

/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011  Cyan Worlds, Inc.

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.

You can contact Cyan Worlds, Inc. by email legal@cyan.com
 or by snail mail at:
      Cyan Worlds, Inc.
      14617 N Newport Hwy
      Mead, WA   99021

*==LICENSE==*/

#include "hsTypes.h"
#include "hsMemory.h"
#include "hsSfxGlobalShade.h"
#include "hsStream.h"
//#include "../plPipeline/hsG3DDevice.h"
#include "../plPipeline/plPipeline.h"
#include "../plGLight/hsGProjector3.h"
#include "../plSurface/hsGLayer.h"
#include "../plSurface/hsGMaterial.h"
#include "../plDrawable/plDrawable.h"
#include "../plIntersect/hsBounds.h"


void hsSfxGlobalShade::ISetIntensity(hsPoint3& pos)
{
    if( fGSFlags & kFromFog )
        ISetFromFog(pos);
    else
    if( fGSFlags & kFromClear )
        ISetFromClear(pos);
    else
    if( fGSFlags & kFromLights )
        ISetFromLights(pos);

    fIntensity.a = hsMaximum(fIntensity.r, hsMaximum(fIntensity.g, fIntensity.b));
}

void hsSfxGlobalShade::ISetFromClear(hsPoint3& pos)
{
    fIntensity.Set(0,0,0,0);
#if 0       // Taken out 2.26.2001 mcn 'cause it accesses the (now defunct) 3DDevice directly
    hsG3DDevice* dev = fPipeline->Get3DDevice();
    hsGEnvironment* env = dev->GetEnvironment();
    if( env && (env->GetFlags() & hsGEnvironment::kClearColorSet) )
    {
        fIntensity = env->GetClearColor();
    }
#endif
}

void hsSfxGlobalShade::ISetFromFog(hsPoint3& pos)
{
    fIntensity.Set(0,0,0,0);
#if 0       // Taken out 2.26.2001 mcn 'cause it accesses the (now defunct) 3DDevice directly
    hsG3DDevice* dev = fPipeline->Get3DDevice();
    hsGEnvironment* env = dev->GetEnvironment();
    if( env && (env->GetFlags() & hsGEnvironment::kFogColorSet) )
    {
        fIntensity = env->GetFogColor();
    }
#endif
}

void hsSfxGlobalShade::ISetFromLights(hsPoint3& pos)
{
    fIntensity = ISumLights(pos);
}

hsColorRGBA hsSfxGlobalShade::ISumLights(hsPoint3& pos)
{
    hsColorRGBA accum;
    accum.Set(0,0,0,0);

#if 0       // Taken out 2.26.2001 mcn 'cause it accesses the (now defunct) 3DDevice directly
    hsG3DDevice* dev = fPipeline->Get3DDevice();
    for( dev->FirstProjector(); dev->MoreProjectors(); dev->IncProjector() )
    {
        hsGProjector3* proj = dev->CurrProjector();

        if( proj->IsOmni() )
        {
            hsScalar intensity = proj->AttenuatePoint(&pos) * proj->GetIntensity();
            
            if( intensity > 0.f )
            {
                hsColorRGBA col = intensity * proj->GetLightColor();                
                accum += col;
            }
        }
        else
        if( proj->IsPerspective() ) // spot
        {
            hsPoint4 ang;
            UInt32 clips;
            proj->GetNdcPoints(1, &pos, sizeof(pos), &ang, kClipAll, &clips);

            if( !clips
                || !( proj->IsAttenuated() || proj->AttenuatesAlpha() || (clips & ~kClipYon) )
                )
            {
                hsScalar intensity = proj->AttenuatePoint(&pos) * proj->GetIntensity();
                
                if( intensity > 0.f )
                {
                    hsColorRGBA col = intensity * proj->GetLightColor();                
                    accum += col;
                }
            }
        }
        else // directional
        {
            hsColorRGBA col = proj->GetIntensity() * proj->GetLightColor();             
            accum += col;
        }
    }
#endif
    return accum;
}

void hsSfxGlobalShade::ProcessPreInterpShadeVerts(hsExpander<hsGShadeVertex*>& vList)
{
    if( fCurrentLayer )
    {
        if( fGSFlags & kAffectDiffuse )
            fCurrentLayer->SetColor(fRestoreColor.r, fRestoreColor.g, fRestoreColor.b, fRestoreColor.a);
        else
            fCurrentLayer->SetAmbientColor(fRestoreColor.r, fRestoreColor.g, fRestoreColor.b, fRestoreColor.a);
    }

#if 0       // Taken out 2.26.2001 mcn 'cause it accesses the (now defunct) 3DDevice directly
    hsG3DDevice* dev = fPipeline->Get3DDevice();
    hsRefCnt_SafeAssign(fCurrentLayer, dev->GetCurrentLayer());
    if( fCurrentLayer )
    {
        fRestoreColor = fGSFlags & kAffectDiffuse ? fCurrentLayer->GetColor() : fCurrentLayer->GetAmbientColor();
        hsColorRGBA col = fAmbient;
        if( fGSFlags & kScalarIntensity )
        {
            col.r += fDiffuse.r * fIntensity.a;
            col.g += fDiffuse.g * fIntensity.a;
            col.b += fDiffuse.b * fIntensity.a;
        }
        else
        {
            col.r += fDiffuse.r * fIntensity.r;
            col.g += fDiffuse.g * fIntensity.g;
            col.b += fDiffuse.b * fIntensity.b;
        }
        if( fGSFlags & kAffectDiffuse )
            fCurrentLayer->SetColor(col.r, col.g, col.b, fRestoreColor.a);
        else
            fCurrentLayer->SetAmbientColor(col.r, col.g, col.b, fRestoreColor.a);
    }
#endif
}

hsBool32 hsSfxGlobalShade::BeginObject(plPipeline* pipe, plDrawable* obj)
{
    hsBool32 retVal = hsGRenderProcs::BeginObject(pipe, obj);

    const hsBounds3Ext& bnd = obj->GetLocalBounds();
    hsPoint3 pos = bnd.GetCenter();
    ISetIntensity(pos);

    return retVal;
}

void hsSfxGlobalShade::EndObject()
{
    hsGRenderProcs::EndObject();
    if( fCurrentLayer )
    {
        if( fGSFlags & kAffectDiffuse )
            fCurrentLayer->SetColor(fRestoreColor.r, fRestoreColor.g, fRestoreColor.b, fRestoreColor.a);
        else
            fCurrentLayer->SetAmbientColor(fRestoreColor.r, fRestoreColor.g, fRestoreColor.b, fRestoreColor.a);
        hsRefCnt_SafeUnRef(fCurrentLayer);
        fCurrentLayer = nil;
    }
}

void hsSfxGlobalShade::Read(hsStream* s)
{
    fGSFlags = s->ReadSwap32();
    fAmbient.Read(s);
    fDiffuse.Read(s);
    if( fGSFlags & kFromLights )
        fGSFlags |= kAffectDiffuse;
}

void hsSfxGlobalShade::Write(hsStream* s)
{
    s->WriteSwap32(fGSFlags);
    fAmbient.Write(s);
    fDiffuse.Write(s);
}

hsSfxGlobalShade::hsSfxGlobalShade()
{
    fCurrentLayer = nil;
    fGSFlags = 0;
    fAmbient.Set(0,0,0,0);
    fDiffuse.Set(1.f,1.f,1.f,1.f);
}

hsSfxGlobalShade::~hsSfxGlobalShade()
{
    hsRefCnt_SafeUnRef(fCurrentLayer); // should be nil anyway unless we're destroyed during processing
}