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// Copyright (C) 2015 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 "qabstractphysicaldevicebackendnode_p.h"
#include "qabstractphysicaldevicebackendnode_p_p.h"
#include <Qt3DInput/qabstractphysicaldevice.h>
#include <Qt3DInput/qaxissetting.h>
#include <Qt3DInput/qinputaspect.h>
#include <cmath>
#include <algorithm>
#include <Qt3DInput/private/inputhandler_p.h>
#include <Qt3DInput/private/inputmanagers_p.h>
#include <Qt3DInput/private/qinputaspect_p.h>
#include <Qt3DCore/private/qabstractaspect_p.h>
QT_BEGIN_NAMESPACE
namespace {
constexpr int signum(float v)
{
return (v > 0.0f) - (v < 0.0f);
}
}
namespace Qt3DInput {
QAbstractPhysicalDeviceBackendNodePrivate::QAbstractPhysicalDeviceBackendNodePrivate(Qt3DCore::QBackendNode::Mode mode)
: Qt3DCore::QBackendNodePrivate(mode)
, m_axisSettings()
, m_inputAspect(nullptr)
{
}
void QAbstractPhysicalDeviceBackendNodePrivate::addAxisSetting(int axisIdentifier, Qt3DCore::QNodeId axisSettingsId)
{
Input::AxisIdSetting axisIdSetting;
axisIdSetting.m_axisIdentifier = axisIdentifier;
axisIdSetting.m_axisSettingsId = axisSettingsId;
// Replace if already present, otherwise append
const auto end = m_axisSettings.end();
for (auto it = m_axisSettings.begin(); it != end; ++it) {
if (it->m_axisIdentifier == axisIdentifier) {
*it = axisIdSetting;
return;
}
}
m_axisSettings.push_back(axisIdSetting);
}
void QAbstractPhysicalDeviceBackendNodePrivate::removeAxisSetting(Qt3DCore::QNodeId axisSettingsId)
{
const auto end = m_axisSettings.end();
for (auto it = m_axisSettings.begin(); it != end; ++it) {
if (it->m_axisSettingsId == axisSettingsId) {
m_axisSettings.erase(it);
return;
}
}
}
Input::MovingAverage &QAbstractPhysicalDeviceBackendNodePrivate::getOrCreateFilter(int axisIdentifier)
{
const auto end = m_axisFilters.end();
for (auto it = m_axisFilters.begin(); it != end; ++it) {
if (it->m_axisIdentifier == axisIdentifier)
return it->m_filter;
}
Input::AxisIdFilter axisIdFilter;
axisIdFilter.m_axisIdentifier = axisIdentifier;
m_axisFilters.push_back(axisIdFilter);
return m_axisFilters.last().m_filter;
}
Input::AxisSetting *QAbstractPhysicalDeviceBackendNodePrivate::getAxisSetting(Qt3DCore::QNodeId axisSettingId) const
{
Q_Q(const QAbstractPhysicalDeviceBackendNode);
QInputAspectPrivate *aspectPrivate = static_cast<QInputAspectPrivate *>(Qt3DCore::QAbstractAspectPrivate::get(q->inputAspect()));
Input::InputHandler *handler = aspectPrivate->m_inputHandler.data();
Input::AxisSetting *axisSetting = handler->axisSettingManager()->getOrCreateResource(axisSettingId);
return axisSetting;
}
QAbstractPhysicalDeviceBackendNode::QAbstractPhysicalDeviceBackendNode(QBackendNode::Mode mode)
: Input::BackendNode(*new QAbstractPhysicalDeviceBackendNodePrivate(mode))
{
}
QAbstractPhysicalDeviceBackendNode::QAbstractPhysicalDeviceBackendNode(QAbstractPhysicalDeviceBackendNodePrivate &dd)
: Input::BackendNode(dd)
{
}
void QAbstractPhysicalDeviceBackendNode::cleanup()
{
Q_D(QAbstractPhysicalDeviceBackendNode);
QBackendNode::setEnabled(false);
d->m_axisSettings.clear();
d->m_axisFilters.clear();
d->m_inputAspect = nullptr;
}
void QAbstractPhysicalDeviceBackendNode::syncFromFrontEnd(const Qt3DCore::QNode *frontEnd, bool firstTime)
{
Q_D(QAbstractPhysicalDeviceBackendNode);
BackendNode::syncFromFrontEnd(frontEnd, firstTime);
const Qt3DInput::QAbstractPhysicalDevice *node = qobject_cast<const Qt3DInput::QAbstractPhysicalDevice *>(frontEnd);
if (!node)
return;
auto settings = Qt3DCore::qIdsForNodes(node->axisSettings());
std::sort(std::begin(settings), std::end(settings));
Qt3DCore::QNodeIdVector addedSettings;
Qt3DCore::QNodeIdVector removedSettings;
std::set_difference(std::begin(settings), std::end(settings),
std::begin(d->m_currentAxisSettingIds), std::end(d->m_currentAxisSettingIds),
std::inserter(addedSettings, addedSettings.end()));
std::set_difference(std::begin(d->m_currentAxisSettingIds), std::end(d->m_currentAxisSettingIds),
std::begin(settings), std::end(settings),
std::inserter(removedSettings, removedSettings.end()));
d->m_currentAxisSettingIds = settings;
for (const auto &axisSettingId: std::as_const(addedSettings)) {
Input::AxisSetting *axisSetting = d->getAxisSetting(axisSettingId);
const auto axisIds = axisSetting->axes();
for (int axisId : axisIds)
d->addAxisSetting(axisId, axisSettingId);
}
for (const auto &axisSettingId: std::as_const(removedSettings))
d->removeAxisSetting(axisSettingId);
}
void QAbstractPhysicalDeviceBackendNode::setInputAspect(QInputAspect *aspect)
{
Q_D(QAbstractPhysicalDeviceBackendNode);
d->m_inputAspect = aspect;
}
QInputAspect *QAbstractPhysicalDeviceBackendNode::inputAspect() const
{
Q_D(const QAbstractPhysicalDeviceBackendNode);
return d->m_inputAspect;
}
float QAbstractPhysicalDeviceBackendNode::processedAxisValue(int axisIdentifier)
{
Q_D(QAbstractPhysicalDeviceBackendNode);
// Find axis settings for this axis (if any)
Qt3DCore::QNodeId axisSettingId;
const auto end = d->m_axisSettings.cend();
for (auto it = d->m_axisSettings.cbegin(); it != end; ++it) {
if (it->m_axisIdentifier == axisIdentifier) {
axisSettingId = it->m_axisSettingsId;
break;
}
}
const float rawAxisValue = axisValue(axisIdentifier);
if (axisSettingId.isNull()) {
// No special processing. Just return the raw value
return rawAxisValue;
} else {
// Process the raw value in accordance with the settings
Input::AxisSetting *axisSetting = d->getAxisSetting(axisSettingId);
Q_ASSERT(axisSetting);
float val = rawAxisValue;
// Low pass smoothing
if (axisSetting->isSmoothEnabled()) {
// Get the filter corresponding to this axis
Input::MovingAverage &filter = d->getOrCreateFilter(axisIdentifier);
filter.addSample(val);
val = filter.average();
}
// Deadzone handling
const float d = axisSetting->deadZoneRadius();
if (!qFuzzyIsNull(d)) {
if (std::abs(val) <= d) {
val = 0.0f;
} else {
// Calculate value that goes from 0 to 1 linearly from the boundary of
// the dead zone up to 1. That is we with a dead zone value of d, we do not
// want a step change from 0 to d when the axis leaves the deadzone. Instead
// we want to increase the gradient of the line so that it goes from 0 to 1
// over the range d to 1. So instead of having y = x, the equation of the
// line becomes
//
// y = x / (1-d) - d / (1-d) = (x - d) / (1 - d)
//
// for positive values, and
//
// y = x / (1-d) + d / (1-d) = (x + d) / (1 - d)
//
// for negative values.
val = (val - signum(val) * d) / (1.0f - d);
}
}
return val;
}
}
} // Qt3DInput
QT_END_NAMESPACE
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