CWE-ou-minkata/Sources/Tools/MaxPlasmaMtls/Materials/plPassMtl.cpp

/*==LICENSE==*

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

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combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK,
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*==LICENSE==*/
#include "HeadSpin.h"
#include "hsBitVector.h"
#include "hsWindows.h"
#include "../resource.h"

#include "MaxMain/MaxCompat.h"
#include <iparamm2.h>
#include <stdmat.h>
#pragma hdrstop

#include "plPassMtl.h"
#include "../Shaders.h"
#include "MaxComponent/plMaxAnimUtils.h"

#include "plPassBaseParamIDs.h"
#include "plPassMtlBasicPB.h"
#include "plPassMtlLayersPB.h"

#include "../Layers/plLayerTex.h"
#include "../Layers/plStaticEnvLayer.h"

extern HINSTANCE hInstance;

class plPassMtlClassDesc : public ClassDesc2
{
public:
    int             IsPublic()      { return TRUE; }
    void*           Create(BOOL loading) { return new plPassMtl(loading); }
    const TCHAR*    ClassName()     { return GetString(IDS_PASS_MTL); }
    SClass_ID       SuperClassID()  { return MATERIAL_CLASS_ID; }
    Class_ID        ClassID()       { return PASS_MTL_CLASS_ID; }
    const TCHAR*    Category()      { return NULL; }
    const TCHAR*    InternalName()  { return _T("PlasmaMaterial"); }
    HINSTANCE       HInstance()     { return hInstance; }
};
static plPassMtlClassDesc plPassMtlDesc;
ClassDesc2* GetPassMtlDesc() { return &plPassMtlDesc; }

// For initializing paramblock descriptor
ParamBlockDesc2 *GetPassBasicPB();
ParamBlockDesc2 *GetPassAdvPB();
ParamBlockDesc2 *GetPassLayersPB();

#include "plPassMtlAdvPBDec.h"
#include "plPassMtlBasicPBDec.h"
#include "plPassMtlLayersPBDec.h"
#include "plPassMtlAnimPBDec.h"

#include "plAnimStealthNode.h"

plPassMtl::plPassMtl(BOOL loading) : plPassMtlBase( loading )
{
    plPassMtlDesc.MakeAutoParamBlocks( this );
    fLayersPB->SetValue( kPassLayBase, 0, new plLayerTex );
    fLayersPB->SetValue( kPassLayTop, 0, new plLayerTex );

    // If we do this later (like, when the dialog loads) something blows up,
    // somewhere in Max.  It didn't in 4, it does in 7.  This seems to fix it.
    if (!loading)
        IVerifyStealthPresent(ENTIRE_ANIMATION_NAME);
}

plPassMtl::~plPassMtl()
{
}

void plPassMtl::GetClassName(TSTR& s)
{
    s = GetString(IDS_PASS_MTL);
}

ParamDlg* plPassMtl::CreateParamDlg(HWND hwMtlEdit, IMtlParams *imp) 
{
    fIMtlParams = imp;
    IAutoMParamDlg* masterDlg = plPassMtlDesc.CreateParamDlgs(hwMtlEdit, imp, this);

    return (ParamDlg*)masterDlg;    
}

BOOL plPassMtl::SetDlgThing(ParamDlg* dlg)
{
    return FALSE;
}

Interval plPassMtl::Validity(TimeValue t)
{
#if 0 // mf horse
    Interval valid = FOREVER;       

/*  for (int i = 0; i < fSubTexmap.Count(); i++) 
    {
        if (fSubTexmap[i]) 
            valid &= fSubTexmap[i]->Validity(t);
    }
*/  
//  float u;
//  fPBlock->GetValue(pb_spin,t,u,valid);
    return valid;
#else // mf horse
    const char* name = GetName();

    // mf horse - Hacking in something like real validity checking
    // to get material animations working. No warranty, this is just
    // better than nothing.
    Interval v = FOREVER;
    fBasicPB->GetValidity(t, v);
    fAdvPB->GetValidity(t, v);

    if( fLayersPB->GetTexmap(kPassLayBase) )
        v &= fLayersPB->GetTexmap(kPassLayBase)->Validity(t);
    if( fLayersPB->GetTexmap(kPassLayTop) )
        v &= fLayersPB->GetTexmap(kPassLayTop)->Validity(t);
    return v;
#endif // mf horse
}

//// GetReference ////////////////////////////////////////////////////////////
//  Note: need to overload because MAX for some reason writes out the
//  references by their INDEX. ARRRRGH!

RefTargetHandle plPassMtl::GetReference( int i )
{
    switch( i )
    {
        case kRefBasic:  return fBasicPB;
        case kRefAdv:    return fAdvPB;
        case kRefLayers: return fLayersPB;
        case kRefAnim:   return fAnimPB;
    }

    return plPassMtlBase::GetReference( i );
}

//// SetReference ////////////////////////////////////////////////////////////
//  Note: need to overload because MAX for some reason writes out the
//  references by their INDEX. ARRRRGH!

void plPassMtl::SetReference(int i, RefTargetHandle rtarg)
{
    if (i == kRefBasic)
        fBasicPB = (IParamBlock2 *)rtarg;
    else if (i == kRefAdv)
        fAdvPB = (IParamBlock2 *)rtarg;
    else if (i == kRefLayers)
        fLayersPB = (IParamBlock2 *)rtarg;
    else if (i == kRefAnim)
        fAnimPB = (IParamBlock2 *)rtarg;
    else
        plPassMtlBase::SetReference( i, rtarg );
}

/*===========================================================================*\
 |  Subanim & References support
\*===========================================================================*/

int plPassMtl::NumSubs()
{
    return 6;
}

TSTR plPassMtl::SubAnimName(int i) 
{
    switch (i)
    {
    case 0: return fBasicPB->GetLocalName();
    case 1: return fAdvPB->GetLocalName();
    case 2: return fLayersPB->GetLocalName();
    case 3: return fAnimPB->GetLocalName();
    case 4: return "Base Layer";
    case 5: return "Top Layer";
    }

    return "";
}

Animatable* plPassMtl::SubAnim(int i)
{
    switch (i)
    {
    case 0: return fBasicPB;
    case 1: return fAdvPB;
    case 2: return fLayersPB;
    case 3: return fAnimPB;
    case 4: return fLayersPB->GetTexmap(kPassLayBase);
    case 5:
        if (fLayersPB->GetInt(kPassLayTopOn))
            return fLayersPB->GetTexmap(kPassLayTop);
        break;
    }

    return NULL;
}

int plPassMtl::NumParamBlocks()
{
    return 4;
}

IParamBlock2* plPassMtl::GetParamBlock(int i)
{
    return (IParamBlock2*)GetReference(i);
}

IParamBlock2* plPassMtl::GetParamBlockByID(BlockID id)
{
    if (fBasicPB->ID() == id)
        return fBasicPB;
    else if (fAdvPB->ID() == id)
        return fAdvPB;
    else if (fLayersPB->ID() == id)
        return fLayersPB;
    else if (fAnimPB->ID() == id)
        return fAnimPB;

    return NULL;
}

RefResult plPassMtl::NotifyRefChanged(Interval changeInt, RefTargetHandle hTarget, PartID& partID, RefMessage message) 
{
    return plPassMtlBase::NotifyRefChanged( changeInt, hTarget, partID, message );
}

////////////////////////////////////////////////////////////////////////////////
// Subtexmap access

int plPassMtl::NumSubTexmaps()
{
    return 2;
}

Texmap* plPassMtl::GetSubTexmap(int i)
{
    if (i == 0)
        return fLayersPB->GetTexmap(kPassLayBase);
    else if (i == 1)
        return fLayersPB->GetTexmap(kPassLayTop);

    return NULL;
}

void plPassMtl::SetSubTexmap(int i, Texmap *m)
{
    if (i == 0)
        fLayersPB->SetValue(kPassLayBase, 0, m);
    else if (i == 1)
        fLayersPB->SetValue(kPassLayTop, 0, m);
}

TSTR plPassMtl::GetSubTexmapSlotName(int i)
{
    if (i == 0)
        return "Base";
    else if (i == 1)
        return "Top";

    return "";
}

TSTR plPassMtl::GetSubTexmapTVName(int i)
{
    return GetSubTexmapSlotName(i);
}

int plPassMtl::SubTexmapOn(int i)
{
   if (i == 0)
      return 1;
   else if (i == 1 && fLayersPB->GetInt(kPassLayTopOn))
      return 1;

   return 0;
}


/*===========================================================================*\
 |  Updating and cloning
\*===========================================================================*/

RefTargetHandle plPassMtl::Clone(RemapDir &remap)
{
    plPassMtl *mnew = new plPassMtl(FALSE);
    plPassMtlBase::ICloneBase( mnew, remap );
    return (RefTargetHandle)mnew;
}

void    plPassMtl::ICloneRefs( plPassMtlBase *target, RemapDir &remap )
{
    target->ReplaceReference(kRefBasic, remap.CloneRef(fBasicPB));
    target->ReplaceReference(kRefAdv, remap.CloneRef(fAdvPB));
    target->ReplaceReference(kRefLayers, remap.CloneRef(fLayersPB));
    target->ReplaceReference(kRefAnim, remap.CloneRef(fAnimPB));
}

void plPassMtl::NotifyChanged() 
{
    NotifyDependents(FOREVER, PART_ALL, REFMSG_CHANGE);
}

void plPassMtl::Update(TimeValue t, Interval& valid) 
{   
    // mf horse - Hacking in something like real validity checking
    // to get material animations working. No warranty, this is just
    // better than nothing.
    if (!fIValid.InInterval(t))
    {
        fIValid.SetInfinite();
        if( fLayersPB->GetTexmap(kPassLayBase) )
            fLayersPB->GetTexmap(kPassLayBase)->Update(t, fIValid);
        if( fLayersPB->GetTexmap(kPassLayTop) )
            fLayersPB->GetTexmap(kPassLayTop)->Update(t, fIValid);

//      fLayersPB->GetValue(kMtlLayLayer1On, t, fMapOn[0], fIValid);
/*
        for (int i = 0; i < fSubTexmap.Count(); i++)
        {
            if (fSubTexmap[i]) 
                fSubTexmap[i]->Update(t,fIValid);
        }
*/
    }

    // Our wonderful way of version handling--if the runtimeColor is (-1,-1,-1), we know it's
    // just been initialized, so set it to the static color (this lets us do the right thing for
    // loading old paramBlocks)
    if( fBasicPB )
    {
        Color   run = fBasicPB->GetColor( kPassBasRunColor, 0 );
        if( run == Color(-1,-1,-1) )
        {
            fBasicPB->SetValue( kPassBasRunColor, 0, fBasicPB->GetColor( kPassBasColor, 0 ) );
        }

        // Also, if shineStr is anything other than -1, then it must be an old paramblock and we need
        // to convert to our new specColor (we know this because the original valid range was 0-100)
        int shine = fBasicPB->GetInt( kPassBasShineStr, 0 );
        if( shine != -1 )
        {
            fBasicPB->SetValue( kPassBasSpecColor, 0, Color( (float)shine / 100.f, (float)shine / 100.f, (float)shine / 100.f ) );
            fBasicPB->SetValue( kPassBasShineStr, 0, (int)-1 );
        }       
    }

    valid &= fIValid;
}

/*===========================================================================*\
 |  Determine the characteristics of the material
\*===========================================================================*/

void plPassMtl::SetAmbient(Color c, TimeValue t) {}     
void plPassMtl::SetDiffuse(Color c, TimeValue t) {}     
void plPassMtl::SetSpecular(Color c, TimeValue t) {}
void plPassMtl::SetShininess(float v, TimeValue t) {}
                
Color plPassMtl::GetAmbient(int mtlNum, BOOL backFace)  { return Color(0,0,0); }
Color plPassMtl::GetDiffuse(int mtlNum, BOOL backFace)  { return Color(0,0,0); }
Color plPassMtl::GetSpecular(int mtlNum, BOOL backFace) { return Color(0,0,0); }

float plPassMtl::GetXParency(int mtlNum, BOOL backFace)
{
    int         opacity = fBasicPB->GetInt( kPassBasOpacity, 0 );
    float       alpha = 1.0f - ( (float)opacity / 100.0f );

    return alpha;
}

float plPassMtl::GetShininess(int mtlNum, BOOL backFace)    { return 0.0f; }
float plPassMtl::GetShinStr(int mtlNum, BOOL backFace)  { return 0.0f; }
float plPassMtl::WireSize(int mtlNum, BOOL backFace)        { return 0.0f; }

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

void plPassMtl::SetupGfxMultiMaps(TimeValue t, Material *mtl, MtlMakerCallback &cb)
{
#if 0
    if (texHandleValid.InInterval(t)) {
        mtl->texture.SetCount(numTexHandlesUsed);
        for (int i=0; i<numTexHandlesUsed; i++) {
            if (texHandle[i]) {
                mtl->texture[i].textHandle = texHandle[i]->GetHandle();
                Texmap *tx = (*maps)[useSubForTex[i]].map;
                cb.GetGfxTexInfoFromTexmap(t, mtl->texture[i], tx );        
                SetTexOps(mtl,i,texOpsType[i]);
                }
            }
        return;
        }
#endif

#if 0   // WTF?!?!?!?
    Texmap *tx[2];
    int diffChan = stdIDToChannel[ ID_DI ];
    int opacChan = stdIDToChannel[ ID_OP ];
    tx[0] = (*maps)[diffChan].IsActive()?(*maps)[diffChan].map:NULL;
    tx[1] = (*maps)[opacChan].IsActive()?(*maps)[opacChan].map:NULL;
#endif

    int nsupport = cb.NumberTexturesSupported();
#if 0
    BITMAPINFO *bmi[NTEXHANDLES];

    int nmaps=0;
    for (int i=0; i<NTEXHANDLES; i++) {
        if (tx[i]) nmaps ++;
        bmi[i] = NULL;
        }
    mtl->texture.SetCount(nmaps);
    if (nmaps==0) 
        return;
    for (i=0; i<nmaps; i++)
        mtl->texture[i].textHandle = NULL;
    texHandleValid.SetInfinite();
    Interval  valid;
    BOOL needDecal = FALSE;
    int ntx = 0;
    int op; 

    int forceW = 0;
    int forceH = 0;
    if (tx[0]) {
        cb.GetGfxTexInfoFromTexmap(t, mtl->texture[0], tx[0]);      
        TextureInfo &ti = mtl->texture[0];
        if (ti.tiling[0]==GW_TEX_NO_TILING||ti.tiling[1]==GW_TEX_NO_TILING)
            needDecal = TRUE;
        op = needDecal?TXOP_ALPHABLEND:TXOP_MODULATE;
        bmi[0] = tx[0]->GetVPDisplayDIB(t,cb,valid,FALSE); 
        if (bmi[0]) {
            texHandleValid &= valid;
            useSubForTex[0] = diffChan;
            ntx = 1;
            forceW = bmi[0]->bmiHeader.biWidth;
            forceH = bmi[0]->bmiHeader.biHeight;
            }
        }
    if (tx[1]) {
        cb.GetGfxTexInfoFromTexmap(t, mtl->texture[ntx], tx[1]);        
        if (nsupport>ntx) {
            bmi[1] = tx[1]->GetVPDisplayDIB(t,cb,valid,TRUE); 
            if (bmi[1]) {
                texHandleValid &= valid;
                StuffAlpha(bmi[1], (*maps)[opacChan].amount, GetOpacity(t),ntx?whiteCol:pShader->GetDiffuseClr(t));
                texHandle[ntx] = cb.MakeHandle(bmi[1]); 
                bmi[1] = NULL; 
                mtl->texture[ntx].textHandle = texHandle[ntx]->GetHandle();
                SetTexOps(mtl,ntx,TXOP_OPACITY);
                useSubForTex[ntx] = opacChan;
                ntx++;
                }
            }
        else {
            if (!needDecal) {
                TextureInfo ti;
//              if (SameUV(mtl->texture[0],mtl->texture[1])) {
                    // Not really correct to combine channels for different UV's but what the heck.
                    bmi[1] = tx[1]->GetVPDisplayDIB(t,cb,valid,TRUE, forceW, forceH); 
                    if (bmi[1]) {
                        texHandleValid &= valid;
                        StuffAlphaInto(bmi[1], bmi[0], (*maps)[opacChan].amount, GetOpacity(t));
                        op = TXOP_OPACITY;
                        free(bmi[1]);
                        bmi[1] = NULL;
                        }
//                  }
                }
            }
        }
    if (bmi[0]) {
        texHandle[0] = cb.MakeHandle(bmi[0]); 
        bmi[0] = NULL; 
        mtl->texture[0].textHandle = texHandle[0]->GetHandle();
        SetTexOps(mtl,0,op);
        }
    mtl->texture.SetCount(ntx);
    numTexHandlesUsed = ntx;
#endif
}

/*===========================================================================*\
 |  Actual shading takes place
\*===========================================================================*/

void plPassMtl::GetInterpVtxValue(int channel, ShadeContext &sc, Point3 &val)
{
    Mesh *mesh = sc.globContext->GetRenderInstance(sc.NodeID())->mesh;
    if (mesh != nil)
    {
        Face *maxFace = &mesh->faces[ sc.FaceNumber() ];
        UVVert *map = mesh->mapVerts(channel);
        if (map != nil)
        {
            Point3 p0 = map[maxFace->getVert( 0 )];
            Point3 p1 = map[maxFace->getVert( 1 )];
            Point3 p2 = map[maxFace->getVert( 2 )];
            Point3 interp = sc.BarycentricCoords();
            val.x = interp.x * p0.x + interp.y * p1.x + interp.z * p2.x;
            val.y = interp.x * p0.y + interp.y * p1.y + interp.z * p2.y;
            val.z = interp.x * p0.z + interp.y * p1.z + interp.z * p2.z;
            return;
        }
    }

    // No value defined... set default.
    if (channel == MAP_SHADING)
        val.x = val.y = val.z = 0.0f;
    else
        val.x = val.y = val.z = 1.0f;
}

void plPassMtl::Shade(ShadeContext& sc) 
{
    // Get the background color
    Color backColor, backTrans;
    sc.GetBGColor(backColor, backTrans);

    ShadeWithBackground(sc, backColor);
}

//// Requirements ////////////////////////////////////////////////////////////
//  Tells MAX what we need to render ourselves properly, such as translucency,
//  two-sidedness, etc. Flags are in imtl.h in the MAX SDK.

ULONG   plPassMtl::Requirements( int subMtlNum ) 
{
    ULONG       req = 0;


    req = Mtl::Requirements( subMtlNum );

    // Uncomment this to get the background color fed to our ShadeWithBackground()
    // (slower processing tho)
    //req |= MTLREQ_BGCOL;
    req |= MTLREQ_UV;

    int blendType = fLayersPB->GetInt( kPassLayOutputBlend );
    if( blendType == kBlendAdd )
        req |= MTLREQ_ADDITIVE_TRANSP | MTLREQ_TRANSP;
    else if( blendType == kBlendAlpha )
        req |= MTLREQ_TRANSP;
    else if( fBasicPB->GetInt( kPassBasOpacity, 0 ) != 100 )
        req |= MTLREQ_TRANSP;

    if( fAdvPB->GetInt( kPBAdvTwoSided ) )
        req |= MTLREQ_2SIDE;

    if (req & MTLREQ_FACEMAP)
    {
        int i = 0;
    }
    return req;
}

void plPassMtl::ShadeWithBackground(ShadeContext &sc, Color background, bool useVtxAlpha /* = true */)
{
#if 1

    // old
#if 0
    Color lightCol,rescol, diffIllum0;
    RGBA mval;
    Point3 N0,P;
    BOOL bumped = FALSE;
    int i;

    if (gbufID) 
        sc.SetGBufferID(gbufID);
    
    if (sc.mode == SCMODE_SHADOW) {
        float opac = 0.0;
        for (i=0; i < NumSubTexmaps(); i++)     {
            if (SubTexmapOn(i)) {
                hsMaxLayerBase *hsmLay = (hsMaxLayerBase *)GetSubTexmap(i);
                opac += hsmLay->GetOpacity(t);
            }
        }
        
        float f = 1.0f - opac;
        sc.out.t = Color(f,f,f);
        return;
    }
    
    N0 = sc.Normal();
    P = sc.P();
#endif

    TimeValue t = sc.CurTime();
    Color color(0, 0, 0);
    float alpha = 0.0;

    // Evaluate Base layer
    Texmap *map = fLayersPB->GetTexmap(kPassLayBase);
    if (map && ( map->ClassID() == LAYER_TEX_CLASS_ID 
                || map->ClassID() == STATIC_ENV_LAYER_CLASS_ID ) )
    {
        plLayerTex *layer = (plLayerTex*)map;
        AColor evalColor = layer->EvalColor(sc);

        color = evalColor;
        alpha = evalColor.a;
    }

    // Evaluate Top layer, if it's on
    if (fLayersPB->GetInt(kPassLayTopOn))
    {
        Texmap *map = fLayersPB->GetTexmap(kPassLayTop);
        if (map && ( map->ClassID() == LAYER_TEX_CLASS_ID 
                    || map->ClassID() == STATIC_ENV_LAYER_CLASS_ID 
                    || map->ClassID() == ANGLE_ATTEN_LAYER_CLASS_ID) )
        {
            plPlasmaMAXLayer *layer = (plPlasmaMAXLayer*)map;
            AColor evalColor = layer->EvalColor(sc);

            // Blend layers
            if( !layer->DiscardColor() )
            {
                int blendType = fLayersPB->GetInt(kPassLayBlend);
                switch (blendType)
                {
                case kBlendAdd:
                    color += evalColor * evalColor.a;
                    break;
                case kBlendAlpha:
                    color = (1.0f - evalColor.a) * color + evalColor.a * evalColor;
                    break;
                case kBlendMult:
                    color *= evalColor;
                    break;
                default:    // No blend...
                    color = evalColor;
                    break;
                }
            }
            if( !layer->DiscardAlpha() )
            {
                int alphaType = fLayersPB->GetInt(kPassLayOutputBlend);
                switch( alphaType )
                {
                case kAlphaMultiply:
                    alpha *= evalColor.a;
                    break;
                case kAlphaAdd:
                    alpha += evalColor.a;
                    break;
                case kAlphaDiscard:
                default:
                    break;
                }
            }
        }
    }

#if 1
    AColor black;
    black.Black();
    AColor white;
    white.White();


    SIllumParams ip;
    if (fBasicPB->GetInt(kPassBasEmissive))
    {
        // Emissive objects don't get shaded
        ip.diffIllum = fBasicPB->GetColor(kPassBasColorAmb, t) * color;
        ip.diffIllum.ClampMinMax();
        ip.specIllum = black;
    }
    else
    {
        //
        // Shading setup
        //

        // Setup the parameters for the shader
        ip.amb = fBasicPB->GetColor(kPassBasColorAmb, t);
        ip.diff = fBasicPB->GetColor(kPassBasColor, t) * color;
        ip.diffIllum = black;
        ip.specIllum = black;
        ip.N = sc.Normal();
        ip.V = sc.V();


        //
        // Specularity
        //
        if (fBasicPB->GetInt(kPassBasUseSpec, t))
        {
            ip.sh_str = 1.f;
            ip.spec = fBasicPB->GetColor( kPassBasSpecColor, t );
            ip.ph_exp = (float)pow(2.0f,float(fBasicPB->GetInt(kPassBasShine, t)) / 10.0f);
            ip.shine = float(fBasicPB->GetInt(kPassBasShine, t)) / 100.0f;
        }
        else
        {
            ip.spec = black;
            ip.sh_str = 0;
            ip.ph_exp = 0;
            ip.shine = 0;
        }
        ip.softThresh = 0;

        //

        // Do the shading
        Shader *myShader = GetShader(SHADER_BLINN);
        myShader->Illum(sc, ip);

        // Override shader parameters
        if (fAdvPB->GetInt(kPBAdvNoShade))
        {
            ip.diffIllum = black;
            ip.specIllum = black;
        }
        if (fAdvPB->GetInt(kPBAdvWhite))
        {
            ip.diffIllum = white;
            ip.specIllum = black;
        }

        ip.specIllum.ClampMinMax();
        ip.diffIllum = ip.amb * sc.ambientLight + ip.diff * ip.diffIllum;
        ip.diffIllum.ClampMinMax();
    }

//  AColor returnColor = AColor(opac * ip.diffIllum + ip.specIllum, opac)
#endif

    // Get opacity and combine with alpha
    float opac = float(fBasicPB->GetInt(kPassBasOpacity, t)) / 100.0f;
    alpha *= opac;

    float vtxAlpha = 1.0f;
    if (useVtxAlpha && GetOutputBlend() == plPassMtlBase::kBlendAlpha)
    {
        Point3 p;
        GetInterpVtxValue(MAP_ALPHA, sc, p);
        vtxAlpha = p.x;
    }
    alpha *= vtxAlpha;

    // MAX will do the additive/alpha/no blending for us based on what Requirements()
    // we tell it. However, since MAX's formula is bgnd*sc.out.t + sc.out.c,
    // we have to multiply our output color by the alpha.
    // If we ever need a more complicated blending function, you can request the
    // background color via Requirements() (otherwise it's just black) and then do
    // the blending yourself; however, if the transparency isn't set, the shadows
    // will be opaque, so be careful.
    Color outC = ip.diffIllum + ip.specIllum;

    sc.out.c = ( outC * alpha );
    sc.out.t = Color( 1.f - alpha, 1.f - alpha, 1.f - alpha );

#endif
}

float plPassMtl::EvalDisplacement(ShadeContext& sc)
{
    return 0.0f;
}

Interval plPassMtl::DisplacementValidity(TimeValue t)
{
    Interval iv;
    iv.SetInfinite();

    return iv;  
}

bool plPassMtl::HasAlpha()
{
    return ((plLayerTex *)fLayersPB->GetTexmap(kPassLayBase))->HasAlpha();
}
// Massive list of inherited accessor functions for ParamBlock data

// Advanced Block
int     plPassMtl::GetBasicWire() { return fAdvPB->GetInt(kPBAdvWire); }
int     plPassMtl::GetMeshOutlines() { return fAdvPB->GetInt(kPBAdvMeshOutlines); }
int     plPassMtl::GetTwoSided() { return fAdvPB->GetInt(kPBAdvTwoSided); }
int     plPassMtl::GetSoftShadow() { return fAdvPB->GetInt(kPBAdvSoftShadow); }
int     plPassMtl::GetNoProj() { return fAdvPB->GetInt(kPBAdvNoProj); }
int     plPassMtl::GetVertexShade() { return fAdvPB->GetInt(kPBAdvVertexShade); }
int     plPassMtl::GetNoShade() { return fAdvPB->GetInt(kPBAdvNoShade); }
int     plPassMtl::GetNoFog() { return fAdvPB->GetInt(kPBAdvNoFog); }
int     plPassMtl::GetWhite() { return fAdvPB->GetInt(kPBAdvWhite); }
int     plPassMtl::GetZOnly() { return fAdvPB->GetInt(kPBAdvZOnly); }
int     plPassMtl::GetZClear() { return fAdvPB->GetInt(kPBAdvZClear); }
int     plPassMtl::GetZNoRead() { return fAdvPB->GetInt(kPBAdvZNoRead); }
int     plPassMtl::GetZNoWrite() { return fAdvPB->GetInt(kPBAdvZNoWrite); }
int     plPassMtl::GetZInc() { return fAdvPB->GetInt(kPBAdvZInc); }
int     plPassMtl::GetAlphaTestHigh() { return fAdvPB->GetInt(kPBAdvAlphaTestHigh); }

// Animation block
const char*  plPassMtl::GetAnimName() { return fAnimPB->GetStr(kPBAnimName); }
int     plPassMtl::GetAutoStart() { return fAnimPB->GetInt(kPBAnimAutoStart); }
int     plPassMtl::GetLoop() { return fAnimPB->GetInt(kPBAnimLoop); }
const char*  plPassMtl::GetAnimLoopName() { return fAnimPB->GetStr(kPBAnimLoopName); }
int     plPassMtl::GetEaseInType() { return fAnimPB->GetInt(kPBAnimEaseInType); }
float   plPassMtl::GetEaseInNormLength() { return fAnimPB->GetFloat(kPBAnimEaseInLength); }
float   plPassMtl::GetEaseInMinLength() { return fAnimPB->GetFloat(kPBAnimEaseInMin); }
float   plPassMtl::GetEaseInMaxLength() { return fAnimPB->GetFloat(kPBAnimEaseInMax); }
int     plPassMtl::GetEaseOutType() { return fAnimPB->GetInt(kPBAnimEaseOutType); }
float   plPassMtl::GetEaseOutNormLength() { return fAnimPB->GetFloat(kPBAnimEaseOutLength); }
float   plPassMtl::GetEaseOutMinLength() { return fAnimPB->GetFloat(kPBAnimEaseOutMin); }
float   plPassMtl::GetEaseOutMaxLength() { return fAnimPB->GetFloat(kPBAnimEaseOutMax); }
int     plPassMtl::GetUseGlobal() { return fAnimPB->GetInt(ParamID(kPBAnimUseGlobal)); }
const char*  plPassMtl::GetGlobalVarName() { return fAnimPB->GetStr(ParamID(kPBAnimGlobalName)); }   

// Basic block
int     plPassMtl::GetColorLock() { return fBasicPB->GetInt(kPassBasColorLock); }
Color   plPassMtl::GetAmbColor() { return fBasicPB->GetColor(kPassBasColorAmb); }
Color   plPassMtl::GetColor() { return fBasicPB->GetColor(kPassBasColor); }
int     plPassMtl::GetOpacity() { return fBasicPB->GetInt(kPassBasOpacity); }
int     plPassMtl::GetEmissive() { return fBasicPB->GetInt(kPassBasEmissive); }
int     plPassMtl::GetUseSpec() { return fBasicPB->GetInt(kPassBasUseSpec); }
int     plPassMtl::GetShine() { return fBasicPB->GetInt(kPassBasShine); }
Color   plPassMtl::GetSpecularColor() { return fBasicPB->GetColor(kPassBasSpecColor); }
int     plPassMtl::GetDiffuseColorLock() { return fBasicPB->GetInt(kPassBasDiffuseLock); }
Color   plPassMtl::GetRuntimeColor() { return fBasicPB->GetColor(kPassBasRunColor); }
Control *plPassMtl::GetPreshadeColorController() { return GetParamBlock2Controller(fBasicPB, ParamID(kPassBasColor)); }
Control *plPassMtl::GetAmbColorController() { return GetParamBlock2Controller(fBasicPB, ParamID(kPassBasColorAmb)); }
Control *plPassMtl::GetOpacityController() { return GetParamBlock2Controller(fBasicPB, ParamID(kPassBasOpacity)); }
Control *plPassMtl::GetSpecularColorController() { return GetParamBlock2Controller(fBasicPB, ParamID(kPassBasSpecColor)); }
Control *plPassMtl::GetRuntimeColorController() { return GetParamBlock2Controller(fBasicPB, ParamID(kPassBasRunColor)); }

// Layer block
Texmap *plPassMtl::GetBaseLayer() { return fLayersPB->GetTexmap(kPassLayBase); }
int     plPassMtl::GetTopLayerOn() { return fLayersPB->GetInt(kPassLayTopOn); }
Texmap *plPassMtl::GetTopLayer() { return fLayersPB->GetTexmap(kPassLayTop); }
int     plPassMtl::GetLayerBlend() { return fLayersPB->GetInt(kPassLayBlend); }
int     plPassMtl::GetOutputAlpha() { return fLayersPB->GetInt(kPassLayOutputAlpha); }
int     plPassMtl::GetOutputBlend() { return fLayersPB->GetInt(kPassLayOutputBlend); }