/*---------------------------------------------------------------------------*
  Project:  NintendoWare
  File:     gfx_CalculatedTransform.cpp

  Copyright (C)2009-2010 Nintendo Co., Ltd./HAL Laboratory, Inc.  All rights reserved.

  These coded instructions, statements, and computer programs contain
  proprietary information of Nintendo of America Inc. and/or Nintendo
  Company Ltd., and are protected by Federal copyright law.  They may
  not be disclosed to third parties or copied or duplicated in any form,
  in whole or in part, without the prior written consent of Nintendo.

  $Revision: 24123 $
 *---------------------------------------------------------------------------*/

#include "precompiled.h"

#include <nw/gfx/gfx_CalculatedTransform.h>
#include <nw/gfx/res/gfx_ResSkeleton.h>

namespace nw
{
namespace gfx
{

//----------------------------------------
void
CalculatedTransform::Setup(const ResBone bone)
{
    bool translateZeroFlag = false;
    bool rotateZeroFlag = false;

    this->SetTransform(bone.GetTransform());
    if ( ut::CheckFlag(bone.GetFlags(), ResBoneData::FLAG_IS_IDENTITY) )
    {
        this->EnableFlags(CalculatedTransform::FLAG_IS_IDENTITY);
    }
    if ( ut::CheckFlag(bone.GetFlags(), ResBoneData::FLAG_IS_TRANSLATE_ZERO) )
    {
        this->EnableFlags(CalculatedTransform::FLAG_IS_TRANSLATE_ZERO);
        translateZeroFlag = true;
    }
    if ( ut::CheckFlag(bone.GetFlags(), ResBoneData::FLAG_IS_ROTATE_ZERO) )
    {
        this->EnableFlags(CalculatedTransform::FLAG_IS_ROTATE_ZERO);
        rotateZeroFlag = true;
    }
    if ( ut::CheckFlag(bone.GetFlags(), ResBoneData::FLAG_IS_SCALE_ONE) )
    {
        this->EnableFlags(CalculatedTransform::FLAG_IS_SCALE_ONE);
    }
    if ( ut::CheckFlag(bone.GetFlags(), ResBoneData::FLAG_IS_UNIFORM_SCALE) )
    {
        this->EnableFlags(CalculatedTransform::FLAG_IS_UNIFORM_SCALE);
    }
    if ( translateZeroFlag && rotateZeroFlag )
    {
        this->EnableFlags(CalculatedTransform::FLAG_IS_ROTATE_TRANSLATE_ZERO);
    }
}

//----------------------------------------
void
CalculatedTransform::UpdateFlags()
{
    UpdateScaleFlags();
    UpdateRotateFlags();
    UpdateTranslateFlags();
    UpdateCompositeFlags();
}

//----------------------------------------
void
CalculatedTransform::UpdateRotateFlags()
{
    if (this->IsEnabledFlags(FLAG_IS_IGNORE_ROTATE))
    {
        return;
    }

    const math::MTX34& mtx = this->m_TransformMatrix;
    // 回転行列はノルム 1 なので、対角要素を 2 つ判断すればよい。
    if (mtx.f._00 == 1.0f && mtx.f._11 == 1.0f)
    {
        this->EnableFlags(FLAG_IS_ROTATE_ZERO);
    }
    else
    {
        this->DisableFlags(FLAG_IS_ROTATE_ZERO);
    }
}

//----------------------------------------
void
CalculatedTransform::UpdateTranslateFlags()
{
    if (this->IsEnabledFlags(FLAG_IS_IGNORE_TRANSLATE))
    {
        return;
    }

    const math::MTX34& mtx = this->m_TransformMatrix;
    if (mtx.f._03 == 0.0f && mtx.f._13 == 0.0f && mtx.f._23 == 0.0f)
    {
        this->EnableFlags(FLAG_IS_TRANSLATE_ZERO);
    }
    else
    {
        this->DisableFlags(FLAG_IS_TRANSLATE_ZERO);
    }
}

//----------------------------------------
void
CalculatedTransform::UpdateCompositeFlags()
{
    this->DisableFlags(FLAG_IS_ROTATE_TRANSLATE_ZERO | FLAG_IS_IDENTITY);

    if (this->IsEnabledFlags(FLAG_IS_ROTATE_ZERO | FLAG_IS_TRANSLATE_ZERO))
    {
        this->EnableFlags(FLAG_IS_ROTATE_TRANSLATE_ZERO);

        if (this->IsEnabledFlags(FLAG_IS_SCALE_ONE))
        {
            this->EnableFlags(FLAG_IS_IDENTITY);
        }
    }
}

} // namespace gfx
} // namespace nw