axisaccumulator.cpp

Enable keyboard shortcuts

// 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