/*==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==*/

#ifndef plAccessSpan_inc
#define plAccessSpan_inc

#include "plAccessVtxSpan.h"
#include "plAccessTriSpan.h"
#include "plAccessPartySpan.h"

#include "plSpanTypes.h"
#include "plGeometrySpan.h"

class plGeometrySpan;
class plSpan;

class hsGMaterial;

class plAccessSpan
{
public:
    enum AccessType
    {
        kTri        = 0,
        kParty,
        kVtx,
        kUndefined
    };

private:
    union
    {
        plAccessTriSpan     fAccessTri;
        plAccessPartySpan   fAccessParty;
        plAccessVtxSpan     fAccessVtx;
    } fAccess;
    AccessType      fType;

    const hsMatrix44*   fLocalToWorld;
    const hsMatrix44*   fWorldToLocal;
    hsBounds3Ext*       fLocalBounds;
    hsBounds3Ext*       fWorldBounds;

    hsScalar*           fWaterHeight;

    hsGMaterial*        fMaterial;

    void        SetSource(plSpan* s); 
    void        SetSource(plGeometrySpan* s); 
    void        SetMaterial(hsGMaterial* m) { fMaterial = m; }

    friend class plAccessGeometry;
public:

    plAccessSpan() : fType(kUndefined), fLocalToWorld(nil), fWorldToLocal(nil), fLocalBounds(nil), fWorldBounds(nil), fWaterHeight(nil), fMaterial(nil) {}
    plAccessSpan(AccessType t) : fType(t), fLocalToWorld(nil), fWorldToLocal(nil), fLocalBounds(nil), fWorldBounds(nil), fWaterHeight(nil), fMaterial(nil) {}

    void SetType(AccessType t) { fType = t; }
    AccessType GetType() const { return fType; }

    hsBool HasAccessTri() const { return fType == kTri; }
    hsBool HasAccessParty() const { return fType == kParty; }
    hsBool HasAccessVtx() const { return fType != kUndefined; }

    plAccessTriSpan&    AccessTri() { hsAssert(fType == kTri, "Cross type access"); return fAccess.fAccessTri; }
    plAccessPartySpan&  AccessParty() { hsAssert(fType == kParty, "Cross type access"); return fAccess.fAccessParty; }

    inline plAccessVtxSpan& AccessVtx();


    const hsMatrix44&   GetLocalToWorld() const { return *fLocalToWorld; }
    const hsMatrix44&   GetWorldToLocal() const { return *fWorldToLocal; }

    hsGMaterial*        GetMaterial() const { return fMaterial; }

    const hsBounds3Ext& GetLocalBounds() const { return *fLocalBounds; }
    const hsBounds3Ext& GetWorldBounds() const { return *fWorldBounds; }

    void SetLocalBounds(const hsBounds3Ext& bnd) { *fWorldBounds = *fLocalBounds = bnd; fWorldBounds->Transform(fLocalToWorld); }
    void SetWorldBounds(const hsBounds3Ext& wBnd) { *fWorldBounds = wBnd; }

    hsBool HasWaterHeight() const { return nil != fWaterHeight; }
    hsScalar GetWaterHeight() const { hsAssert(HasWaterHeight(), "Check before asking"); return *fWaterHeight; }
};

inline plAccessVtxSpan& plAccessSpan::AccessVtx()
{
    switch( fType )
    {
    case kTri:
        return fAccess.fAccessTri;
    case kParty:
        return fAccess.fAccessParty;
    case kVtx:
        return fAccess.fAccessVtx;

    case kUndefined:
    default:
        break;
    }
    hsAssert(false, "Undefined type");
    return fAccess.fAccessVtx;
}



#endif // plAccessSpan_inc