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// Copyright (C) 2017 Klaralvdalens Datakonsult AB (KDAB).
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "lerpclipblend_p.h"
#include <Qt3DAnimation/qlerpclipblend.h>
#include <Qt3DAnimation/private/qlerpclipblend_p.h>
QT_BEGIN_NAMESPACE
namespace Qt3DAnimation {
namespace Animation {
LerpClipBlend::LerpClipBlend()
: ClipBlendNode(ClipBlendNode::LerpBlendType)
, m_startClipId()
, m_endClipId()
, m_blendFactor(0.0f)
{
}
LerpClipBlend::~LerpClipBlend()
{
}
void LerpClipBlend::syncFromFrontEnd(const Qt3DCore::QNode *frontEnd, bool firstTime)
{
BackendNode::syncFromFrontEnd(frontEnd, firstTime);
const QLerpClipBlend *node = qobject_cast<const QLerpClipBlend *>(frontEnd);
if (!node)
return;
m_blendFactor = node->blendFactor();
m_startClipId = Qt3DCore::qIdForNode(node->startClip());
m_endClipId = Qt3DCore::qIdForNode(node->endClip());
}
ClipResults LerpClipBlend::doBlend(const QList<ClipResults> &blendData) const
{
Q_ASSERT(blendData.size() == 2);
Q_ASSERT(blendData[0].size() == blendData[1].size());
const qsizetype elementCount = blendData.first().size();
ClipResults blendResults(elementCount);
for (qsizetype i = 0; i < elementCount; ++i)
blendResults[i] = (1.0f - m_blendFactor) * blendData[0][i] + (m_blendFactor * blendData[1][i]);
return blendResults;
}
double LerpClipBlend::duration() const
{
ClipBlendNode *startNode = clipBlendNodeManager()->lookupNode(m_startClipId);
const double startNodeDuration = startNode ? startNode->duration() : 0.0;
ClipBlendNode *endNode = clipBlendNodeManager()->lookupNode(m_endClipId);
const double endNodeDuration = endNode ? endNode->duration() : 0.0;
return (1.0 - static_cast<double>(m_blendFactor)) * startNodeDuration + static_cast<double>(m_blendFactor) * endNodeDuration;
}
} // Animation
} // Qt3DAnimation
QT_END_NAMESPACE
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