/*
* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
* its licensors.
*
* For complete copyright and license terms please see the LICENSE at the root of this
* distribution (the "License"). All use of this software is governed by the License,
* or, if provided, by the license below or the license accompanying this file. Do not
* remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
*
*/
// Original file Copyright Crytek GMBH or its affiliates, used under license.

#include "CryLegacy_precompiled.h"
#include "CryModEffMorph.h"

// starts the morphing sequence
void CryModEffMorph::StartMorph (int nMorphTargetId, const CryCharMorphParams& rParams)
{
    m_Params = rParams;
    m_nMorphTargetId = nMorphTargetId;
    m_fTime = rParams.m_fStartTime;
    m_nFlags = rParams.m_nFlags;
}

void CryModEffMorph::stop()
{
    m_nMorphTargetId = -1;
}

// advances the current time of the played animation and returns the blending factor by which this animation affects the bone pose
void CryModEffMorph::Tick (f32 fDeltaTime)
{
    if (m_nMorphTargetId < 0)
    {
        return;
    }

    if (!(m_nFlags & m_Params.FLAGS_FREEZE))
    {
        m_fTime += fDeltaTime * m_Params.m_fSpeed;
    }

    if ((m_nFlags & m_Params.FLAGS_INSTANTANEOUS) ||
        !(m_nFlags & m_Params.FLAGS_NO_BLENDOUT) && m_fTime > m_Params.m_fBlendIn + m_Params.m_fBlendOut + m_Params.m_fLength)
    {
        // we're finished
        m_nMorphTargetId = -1;
    }
}



// returns the blending for the morph target
f32 CryModEffMorph::getBlending() const
{
    f32 fTimeStable = m_fTime - m_Params.m_fBlendIn;

    if (fTimeStable < 0) // blending in...
    {
        return SmoothBlendValue(m_fTime / m_Params.m_fBlendIn) * m_Params.m_fAmplitude;
    }

    if (m_nFlags & m_Params.FLAGS_NO_BLENDOUT)
    {
        return m_Params.m_fAmplitude; // never blending out - stable morph
    }
    f32 fTimeBlendOut = fTimeStable - m_Params.m_fLength;

    if (fTimeBlendOut < 0)
    {
        return m_Params.m_fAmplitude;
    }

    return SmoothBlendValue(1 - fTimeBlendOut / m_Params.m_fBlendOut) * m_Params.m_fAmplitude;
}

// returns false when this morph target is inactive
bool CryModEffMorph::isActive() const
{
    return m_nMorphTargetId >= 0;
}

// returns the morph target, or -1 if none
int CryModEffMorph::getMorphTargetId () const
{
    return m_nMorphTargetId;
}