qquick3dfrustumcamera.cpp

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// Copyright (C) 2019 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
#include "qquick3dfrustumcamera_p.h"
 
#include <QtQuick3DRuntimeRender/private/qssgrendercamera_p.h>
 
#include <QtMath>
#include <QtQuick3DUtils/private/qssgutils_p.h>
 
#include "qquick3dutils_p.h"
 
#include "qquick3dnode_p_p.h"
 
QT_BEGIN_NAMESPACE
 
QQuick3DFrustumCamera::QQuick3DFrustumCamera(QQuick3DNode *parent)
    : QQuick3DPerspectiveCamera(*(new QQuick3DNodePrivate(QQuick3DNodePrivate::Type::CustomFrustumCamera)), parent)
{}
 
float QQuick3DFrustumCamera::top() const
{
    return m_top;
}
 
float QQuick3DFrustumCamera::bottom() const
{
    return m_bottom;
}
 
float QQuick3DFrustumCamera::right() const
{
    return m_right;
}
 
float QQuick3DFrustumCamera::left() const
{
    return m_left;
}
 
void QQuick3DFrustumCamera::setTop(float top)
{
    if (qFuzzyCompare(m_top, top))
        return;
 
    m_top = top;
    emit topChanged();
    update();
}
 
void QQuick3DFrustumCamera::setBottom(float bottom)
{
    if (qFuzzyCompare(m_bottom, bottom))
        return;
 
    m_bottom = bottom;
    emit bottomChanged();
    update();
}
 
void QQuick3DFrustumCamera::setRight(float right)
{
    if (qFuzzyCompare(m_right, right))
        return;
 
    m_right = right;
    emit rightChanged();
    update();
}
 
void QQuick3DFrustumCamera::setLeft(float left)
{
    if (qFuzzyCompare(m_left, left))
        return;
 
    m_left = left;
    emit leftChanged();
    update();
}
 
QSSGRenderGraphObject *QQuick3DFrustumCamera::updateSpatialNode(QSSGRenderGraphObject *node)
{
    // NOTE: The frustum camera extends the perspective camera!
    QSSGRenderCamera *camera = static_cast<QSSGRenderCamera *>(QQuick3DPerspectiveCamera::updateSpatialNode(node));
    if (camera) {
        const bool changed = ((int(qUpdateIfNeeded(camera->top, m_top))
                              | int(qUpdateIfNeeded(camera->bottom, m_bottom))
                              | int(qUpdateIfNeeded(camera->right, m_right))
                              | int(qUpdateIfNeeded(camera->left, m_left))) != 0);
        if (changed)
            camera->markDirty(QSSGRenderCamera::DirtyFlag::CameraDirty);
    }
 
    return camera;
}
 
QT_END_NAMESPACE