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++ // Copyright (C) 2016 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 "axisaccumulator_p.h"
++
++ #include <Qt3DInput/qaxis.h>
++ #include <Qt3DInput/private/inputmanagers_p.h>
++ #include <Qt3DInput/private/qaxisaccumulator_p.h>
++
++ QT_BEGIN_NAMESPACE
++
++ namespace Qt3DInput {
++ namespace Input {
++
++ AxisAccumulator::AxisAccumulator()
++ : BackendNode(ReadWrite)
++ , m_sourceAxisId()
++ , m_sourceAxisType(QAxisAccumulator::Velocity)
++ , m_scale(1.0f)
++ , m_value(0.0f)
++ , m_velocity(0.0f)
++ {
++ }
++
++ void AxisAccumulator::cleanup()
++ {
++ QBackendNode::setEnabled(false);
++ m_sourceAxisId = Qt3DCore::QNodeId();
++ m_sourceAxisType = QAxisAccumulator::Velocity;
++ m_scale = 1.0f;
++ m_value = 0.0f;
++ }
++
++ void AxisAccumulator::setValue(float value)
++ {
++ if (isEnabled() && value != m_value)
++ m_value = value;
++ }
++
++ void AxisAccumulator::setVelocity(float velocity)
++ {
++ if (isEnabled() && velocity != m_velocity)
++ m_velocity = velocity;
++ }
++
++ void AxisAccumulator::syncFromFrontEnd(const Qt3DCore::QNode *frontEnd, bool firstTime)
++ {
++ BackendNode::syncFromFrontEnd(frontEnd, firstTime);
++ const QAxisAccumulator *node = qobject_cast<const QAxisAccumulator *>(frontEnd);
++ if (!node)
++ return;
++
++ m_sourceAxisId = Qt3DCore::qIdForNode(node->sourceAxis());
++ m_sourceAxisType = node->sourceAxisType();
++ m_scale = node->scale();
++
++ if (firstTime) {
++ m_value = 0.f;
++ m_velocity = 0.f;
++ }
++ }
++
++ void AxisAccumulator::stepIntegration(AxisManager *axisManager, float dt)
++ {
++ Axis *sourceAxis = axisManager->lookupResource(m_sourceAxisId);
++ if (!sourceAxis)
++ return;
++
++ const float axisValue = sourceAxis->axisValue();
++ float newVelocity = 0.0f;
++ float newValue = 0.0f;
++ switch (m_sourceAxisType) {
++ case QAxisAccumulator::Velocity:
++ newVelocity = axisValue * m_scale;
++ newValue = m_value + newVelocity * dt;
++ break;
++
++ case QAxisAccumulator::Acceleration:
++ newVelocity = m_velocity + axisValue * m_scale * dt;
++ newValue = m_value + newVelocity * dt;
++ break;
++ }
++ setVelocity(newVelocity);
++ setValue(newValue);
++ }
++
++ } // namespace Input
++ } // namespace Qt3DInput
++
++ QT_END_NAMESPACE