/*==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 HSAFFINEPARTS_inc
#define HSAFFINEPARTS_inc

#include "hsGeometry3.h"
#include "hsQuat.h"

#include "mat_decomp.h"

class hsAffineParts
{

public:
    // Constructors
    hsAffineParts(gemAffineParts *);    // Convert from Gems struct for now
    hsAffineParts();

    void Reset();

    hsVector3   fT; /* Translation components */
    hsQuat      fQ; /* Essential rotation     */
    hsQuat      fU; /* Stretch rotation   */
    hsVector3   fK; /* Stretch factors    */
    float       fF; /* Sign of determinant    */

    void ComposeMatrix(hsMatrix44 *out) const;
    void ComposeInverseMatrix(hsMatrix44 *out) const;
    void SetFromInterp(const hsAffineParts &ap1, const hsAffineParts &ap2, float t);

    void Read(hsStream *);
    void Write(hsStream *);

    int operator==(const hsAffineParts& a) const
        { return (fT == a.fT && fQ == a.fQ && fU == a.fU && fK == a.fK && fF == a.fF); }
};

//
// General set macro can also be used for 3DSMax struct
//
#define AP_SET(dst, src) \
{ \
    dst.fT.Set(src.t.x, src.t.y, src.t.z); \
    dst.fQ.Set(src.q.x, src.q.y, src.q.z, src.q.w); \
    dst.fU.Set(src.u.x, src.u.y, src.u.z, src.u.w); \
    dst.fK.Set(src.k.x, src.k.y, src.k.z); \
    dst.fF = src.f; \
}

#endif