qtquick3d-helpers.qdoc

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// Copyright (C) 2019 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only
 
/*!
    \qmlmodule QtQuick3D.Helpers
    \title Qt Quick 3D Helpers QML Types
    \brief Module containing helpers for creating applications using Qt Quick 3D.
 
    This module provides helper types that make it easier to develop applications
    using \l{Qt Quick 3D}.
*/
 
/*!
    \qmltype AxisHelper
    \inqmlmodule QtQuick3D.Helpers
    \inherits Node
    \brief Visual helper for showing the 3 axes and a grid in a 3D scene.
 
    \image axishelper.jpg
 
    The X axis is red, the Y axis is green, and the Z axis is blue.
 
    The example scene here has a Sphere at position \c{(0, 0, 0)} and an
    AxisHelper object. With the WasdController helper one can conveniently
    navigate the scene.
 
    \badcode
        View3D {
            anchors.fill: parent
            camera: camera
 
            PerspectiveCamera {
                id: camera
                position: Qt.vector3d(0, 0, 600)
            }
 
            DirectionalLight {
                position: Qt.vector3d(-500, 500, -100)
                color: Qt.rgba(0.4, 0.2, 0.6, 1.0)
                ambientColor: Qt.rgba(0.1, 0.1, 0.1, 1.0)
            }
 
            Model {
                source: "#Sphere"
                materials: [ DefaultMaterial { } ]
            }
 
            AxisHelper {
            }
        }
 
        WasdController {
            controlledObject: camera
        }
   \endcode
*/
 
/*! \qmlproperty color AxisHelper::gridColor
    Specifies the color of the grid. The default value is \c{Qt.rgba(0.8, 0.8, 0.8, 1)}.
*/
/*! \qmlproperty real AxisHelper::gridOpacity
    Specifies the opacity of the grid. The default value is 0.5.
*/
/*! \qmlproperty bool AxisHelper::enableXZGrid
    Enables the grid on XZ plane. The default value is true.
*/
/*! \qmlproperty bool AxisHelper::enableXYGrid
    Enables the grid on XY plane. The default value is false.
*/
/*! \qmlproperty bool AxisHelper::enableYZGrid
    Enables the grid on YZ plane. The default value is false.
*/
/*! \qmlproperty bool AxisHelper::enableAxisLines
    Enables showing the axis lines. The default value is true.
*/
 
/*!
    \qmltype WasdController
    \inqmlmodule QtQuick3D.Helpers
    \inherits Item
    \brief Control node position and orientation with keys and mouse.
 
    This helper allows the user to control a node using W, A, S, D, the arrow
    keys, and the mouse. Usually the controlled node is a Camera, specified in
    the controlledObject property.
 
    Adding a WasdController can be highly useful both in applications that wish
    to provide a standard way of navigating the scene, and also as a temporary
    measure during development and troubleshooting, as it allows inspecting the
    scene at run time via familiar keyboard and mouse navigation.
 
    The key bindings are as follows:
 
    \list
    \li \c W or \c up - go forward
    \li \c S or \c down - go backward
    \li \c A or \c left - strafe left
    \li \c D or \c right - strafe right
    \li \c R or \c {page up} - move up
    \li \c F or \c {page down} - move down
    \li \c shift together with other keys - move faster, depending on \l shiftSpeed
    \endlist
 
    The following snippet shows how a WasdController object can be added. By
    default both key and mouse based navigation is active, so in most cases
    there is no further configuration needed:
 
    \badcode
        View3D {
            anchors.fill: parent
            camera: camera
            PerspectiveCamera {
                id: camera
                position: Qt.vector3d(0, 0, 600)
            }
            ...
        }
 
        WasdController {
            controlledObject: camera
        }
    \endcode
*/
 
/*! \qmlproperty QtQuick3D::Node WasdController::controlledObject
    Specifies the node to control. This is typically a Camera object.
*/
/*! \qmlproperty real WasdController::speed
    Specifies the speed of navigation.
*/
/*! \qmlproperty real WasdController::shiftSpeed
    Specifies the speed multiplier that is active when the shift key is pressed.
*/
/*! \qmlproperty real WasdController::forwardSpeed
    Specifies the speed of navigation when the forward key is pressed.
*/
/*! \qmlproperty real WasdController::backSpeed
    Specifies the speed of navigation when the back key is pressed.
*/
/*! \qmlproperty real WasdController::rightSpeed
    Specifies the speed of navigation when the right key is pressed.
*/
/*! \qmlproperty real WasdController::leftSpeed
    Specifies the speed of navigation when the left key is pressed.
*/
/*! \qmlproperty real WasdController::upSpeed
    Specifies the speed of navigation when the up key is pressed.
*/
/*! \qmlproperty real WasdController::downSpeed
    Specifies the speed of navigation when the down key is pressed.
*/
/*! \qmlproperty real WasdController::xSpeed
    Specifies the speed of navigation when the mouse is moved along the X axis.
*/
/*! \qmlproperty real WasdController::ySpeed
    Specifies the speed of navigation when the mouse is moved along the Y axis.
*/
/*! \qmlproperty bool WasdController::xInvert
    Inverts the x-axis controls. The default value is false.
*/
/*! \qmlproperty bool WasdController::yInvert
    Inverts the y-axis controls. The default value is true.
*/
/*! \qmlproperty bool WasdController::mouseEnabled
    Enables mouse controls. The default value is true.
*/
/*! \qmlproperty bool WasdController::keysEnabled
    Enables key controls. The default value is true.
*/
/*! \qmlproperty bool WasdController::inputsNeedProcessing
    This property is true when there are inputs needing processing.
    \readonly
*/
/*! \qmlproperty enumeration WasdController::acceptedButtons
    Specifies the buttons accepted by the controller.
    \sa DragHandler, MultiPointHandler
*/
 
/*!
    \qmltype DebugView
    \inqmlmodule QtQuick3D.Helpers
    \inherits Rectangle
    \brief View to show rendering statistics and perform debug and developer actions.
 
    This helper allows viewing render performance statistics of a View3D. It
    shows the FPS, sync and render times. In addition, it can also show
    detailed statistics about draw calls, render passes, and the textures and
    meshes used by the scene's assets. The showing of such extended information
    is controlled by the resourceDetailsVisible property, which defaults to
    false.
 
    For example, the following snippet shows how a DebugView can be added that
    shows its information in the top-left corner of the Qt Quick scene:
 
    \badcode
        View3D {
            id: v3d
            anchors.fill: parent
            camera: camera
            PerspectiveCamera {
                id: camera
                position: Qt.vector3d(0, 0, 600)
            }
            ...
        }
        DebugView {
            source: v3d
            resourceDetailsVisible: true
        }
    \endcode
 
    In addition, the \c Tools section allows performing actions such as turning
    on wireframe rendering, or visualizing various aspects of the material.
*/
 
/*! \qmlproperty var DebugView::source
    Specifies the source View3D to show the statistics from.
*/
 
/*! \qmlproperty bool DebugView::resourceDetailsVisible
 
    Indicates whether the additional fields with detailed render pass, mesh,
    texture, and other resource statistics should be shown by default.
 
    The default value is false, which means only CPU timings from the last
    rendered frame will be shown, unless the user interactively enables
    additional data via the on-screen checkbox. Change the value to true to make
    more information visible by default. This includes render pass details and
    the active assets for the last rendered frame.
*/
 
/*!
    \qmltype OrbitCameraController
    \inqmlmodule QtQuick3D.Helpers
    \inherits Item
    \brief Camera Controller which rotates around an origin.
 
    This helper provides a way to rotate a camera around an origin. To function
    OrbitCameraController accepts a Node as the origin, and a Camera object
    which should be a child of the originNode to control. By only adjusting the z
    position of the child camera relative to the parent origin it has the effect
    of moving the camera nearer or farther from the target origin. By applying
    a rotation to the origin node, the child camera will be orbited around the
    origin node.
 
    The OrbitCameraController item itself is a 2D item that accepts input events
    so whatever it's size and position will be where input events are accepted.
    To zoom either use the scroll wheel of the mouse or perform a pinch gesture.
    To rotate click or touch and drag the area. To pan, hold control and drag
    the area. Panning will change the position of the origin node. It is also
    possible to perform a panning gesture by performing a two finger drag.
 
    \badcode
        View3D {
            camera: cameraNode
            Node {
                id: originNode
                PerspectiveCamera {
                    id: cameraNode
                    z: 100
                }
            }
            OrbitCameraController {
                anchors.fill: parent
                origin: originNode
                camera: cameraNode
            }
            ...
        }
    \endcode
*/
 
/*! \qmlproperty QtQuick3D::Node OrbitCameraController::origin
    Specifies the origin node to control. This is a required property and should
    be the parent of the \l camera
*/
/*! \qmlproperty QtQuick3D::Camera OrbitCameraController::camera
    Specifies the camera node to control. This is a required property and should
    be a child of the \l origin node.
*/
/*! \qmlproperty real OrbitCameraController::xSpeed
    Specifies the speed of navigation when the mouse is moved along the X axis.
*/
/*! \qmlproperty real OrbitCameraController::ySpeed
    Specifies the speed of navigation when the mouse is moved along the Y axis.
*/
/*! \qmlproperty bool OrbitCameraController::xInvert
    Inverts the x-axis controls. The default value is false.
*/
/*! \qmlproperty bool OrbitCameraController::yInvert
    Inverts the y-axis controls. The default value is true.
*/
/*! \qmlproperty bool OrbitCameraController::mouseEnabled
    Enables mouse controls. The default value is true.
*/
/*! \qmlproperty bool OrbitCameraController::panEnabled
    Enables panning controls. The default value is true.
*/
 
/*!
    \qmltype LodManager
    \inqmlmodule QtQuick3D.Helpers
    \inherits Node
    \brief Manager that handles level of detail visibility changes.
 
    This helper provides a way to handle level of detail changes. It works
    by changing the visibility of its child nodes based on the distance
    to the camera. The thresholds are determined by the user using the
    distances list. The first distance is the threshold when the manager
    changes from showing the first child and the second child etc. The first
    child should be the most detailed one as it is shown when the camera is
    close. If fadeDistance is set, the manager cross-fades between models by
    changing their opacity. Fading only works with model nodes.
 
    \badcode
        View3D {
            LodManager {
                camera: camera
                distances: [50, 100]
                fadeDistance: 10
 
                Model { ... }
                Model { ... }
                Model { ... }
            }
        }
    \endcode
*/
 
/*! \qmlproperty QtQuick3D::Camera LodManager::camera
    Specifies the camera from which the distance to the child nodes is calculated.
*/
 
/*! \qmlproperty list LodManager::distances
    Specifies the thresholds when the detail level changes. The first number
    is the distance when the first node changes to the second one, etc.
*/
 
/*! \qmlproperty real LodManager::fadeDistance
    Specifies the distance at which the cross-fade between the detail levels
    starts.
*/
 
/*!
    \qmltype ExtendedSceneEnvironment
    \inqmlmodule QtQuick3D.Helpers
    \inherits SceneEnvironment
    \brief A SceneEnvironment providing commonly used rendering effects.
    \since 6.5
 
    The \c ExtendedSceneEnvironment is an extension of QtQuick3D's \l
    SceneEnvironment type that comes with a collection of commonly used effects
    built-in. The effects are exposed through a set of properties that are
    prefixed with the name of the effect they control.
 
    When enabling one or more of these effects, the result is similar to
    manually adding post-processing effects to the SceneEnvironment's
    \l{SceneEnvironment::effects}{effects} list. ExtendedSceneEnvironment
    provides however effects that are not available in standalone form, and
    more importantly, \b{it efficiently combines the effects that are enabled,
    reducing the number of additional render passes needed, which can lead to
    significantly better performance than applying individual post-processing
    effects} to the scene. ExtendedSceneEnvironment also plays well with
    tonemapping, even for the more complicated multiple pass effects, and also
    when multiple effects are enabled and combined together. This was not
    always the case with standalone effects.
 
    \note If additional post-processing effects are added to the
    \l{SceneEnvironment::effects}{effects} list of \l SceneEnvironment, then
    those effects will be applied \e before the effects provided by the \l
    ExtendedSceneEnvironment type.
 
    Certain features of SceneEnvironment, such as the tonemapping, are
    inherited and extended with additional properties in
    ExtendedSceneEnvironment. For example, SceneEnvironment offers the
    \l{SceneEnvironment::tonemapMode}{tonemapMode} property, whereas
    ExtendedSceneEnvironment adds control over the exposure, white point,
    sharpening, and dithering settings of the tonemapper as well. The
    \l{SceneEnvironment::tonemapMode}{tonemapMode} property is not duplicated
    however since ExtendedSceneEnvironment inherits everything from
    SceneEnvironment, so the base setting of the tonemapping mode is usable
    regardless of which type of environment is associated with a View3D, but
    the additional properties are available only when using
    ExtendedSceneEnvironment. Other effects, such as screen space ambient
    occlusion (SSAO) or fog are fully part of SceneEnvironment and are usable
    with both types of environments.
 
    \section1 Getting Started with ExtendedSceneEnvironment
 
    To use the additional features offered by ExtendedSceneEnvironment,
    associate the View3D with an instance of it. Do not forget to import the
    \c{QtQuick3D.Helpers} module.
 
    \qml
        import QtQuick3D
        import QtQuick3D.Helpers
 
        View3D {
            environment: ExtendedSceneEnvironment {
                tonemapMode: SceneEnvironment.Filmic
                vignetteEnabled: true
                // ...
            }
        }
    \endqml
 
    \note Experimenting with the effect parameters and tuning the values to
    achieve the desired visual results can often be more productive when done
    visually, with controls such as sliders that give instant feedback in the
    rendered scene when a value is changed. Using a designer tool such as Qt
    Design Studio, or a test bed similar to the \l{Qt Quick 3D - Scene Effects
    Example} is therefore often recommendable when aiming to set up a high
    quality scene that looks visually appealing.
 
    \note Switching SceneEnvironment to ExtendedSceneEnvironment automatically
    implies at least one additional render pass, just as if an Effect with a
    single pass was added to the
    \l{SceneEnvironment::effects}{SceneEnvironment's effect list}.
    This is true regardless of how many of the individual post-processing steps
    are enabled. (the more complex effects may involve more than one additional
    render pass)
 
    \section1 Available Effects
 
    Below is an overview of the effects and related features provided by
    ExtendedSceneEnvironment, including features inherited from
    SceneEnvironment.
 
    \list
 
    \li \l{SceneEnvironment::tonemapMode}{Tonemapping} - Controls how colors
    are tonemapped from high definition range to the 0-1 range before being
    displayed. ExtendedSceneEnvironment adds additional controls over the
    exposure, white point, sharpening, and dithering.
 
    Controlled by the properties \l tonemapMode, \l exposure, \l whitePoint, \l
    ditheringEnabled.
 
    \image extendedsceneenvironment_tonemap.jpg
 
    \li \l{colorAdjustmentsEnabled}{Color adjustments} - Brightness, contrast,
    saturation adjustment.
 
    Controlled by the properties \l colorAdjustmentsEnabled, \l
    adjustmentBrightness, \l adjustmentContrast, \l adjustmentSaturation.
 
    \image extendedsceneenvironment_coloradj.jpg
 
    \li \l{lutEnabled}{Color grading} via lookup table (LUT) textures.
 
    Controlled by the properties \l lutEnabled, \l lutSize, \l lutFilterAlpha.
 
    \image extendedsceneenvironment_colorgrade.jpg
 
    \li \l{depthOfFieldEnabled}{Depth of field}
 
    Controlled by the properties \l depthOfFieldEnabled, \l
    depthOfFieldFocusDistance, \l depthOfFieldFocusRange, \l
    depthOfFieldBlurAmount.
 
    \image extendedsceneenvironment_dof.jpg
 
    \li \l{glowEnabled}{Glow and bloom}
 
    Controlled by the properties \l glowEnabled, \l glowQualityHigh, \l
    glowUseBicubicUpscale, \l glowStrength, \l glowIntensity, \l glowBloom, \l
    glowBlendMode, \l glowHDRMaximumValue, \l glowHDRMinimumValue, \l
    glowHDRScale.
 
    \image extendedsceneenvironment_glow.jpg
 
    \li \l{vignetteEnabled}{Vignette}
 
    Controlled by the properties \l vignetteEnabled, \l vignetteStrength, \l
    vignetteColor, \l vignetteRadius.
 
    \image extendedsceneenvironment_vignette.jpg
 
    \li \l{lensFlareEnabled}{Lens flare}
 
    Controlled by the properties \l lensFlareEnabled, \l lensFlareBloomBias, \l
    lensFlareGhostDispersal, \l lensFlareGhostCount, \l lensFlareHaloWidth, \l
    lensFlareStretchToAspect, \l lensFlareDistortion, \l lensFlareBlurAmount,
    \l lensFlareApplyDirtTexture, \l lensFlareApplyStarburstTexture, \l
    lensFlareCameraDirection, \l lensFlareLensColorTexture, \l
    lensFlareLensDirtTexture, \l lensFlareLensStarburstTexture.
 
    \image extendedsceneenvironment_lensflare.jpg
 
    \li \l{SceneEnvironment::aoStrength}{Screen space ambient occlusion} -
    Provided by \l SceneEnvironment.
 
    Controlled by \l{SceneEnvironment::aoEnabled},
    \l{SceneEnvironment::aoStrength}, \l{SceneEnvironment::aoDistance},
    \l{SceneEnvironment::aoSoftness}, \l{SceneEnvironment::aoDither},
    \l{SceneEnvironment::aoSampleRate}, \l{SceneEnvironment::aoBias}.
 
    \image extendedsceneenvironment_ssao.jpg
 
    \li \l{SceneEnvironment::fog}{Fog} - Provided by \l SceneEnvironment. This
    is not a post-processing type of effect, but is rather applied to the
    materials of the renderable objects in the scene.
 
    Controlled by the \l{QtQuick3D::Fog}{Fog} object associated with the
    \l{SceneEnvironment::fog} property.
 
    \image extendedsceneenvironment_fog.jpg
 
    \li \l{SceneEnvironment::antialiasingMode}{Antialiasing} - Multisampling,
    supersampling, progressive antialiasing, specular antialiasing, temporal
    antialiasing are provided by \l SceneEnvironment. \l
    ExtendedSceneEnvironment adds the option for using \l{fxaaEnabled}{a form
    of FXAA}.
 
    FXAA is controlled by \l fxaaEnabled. Other antialiasing modes are
    controlled by \l{SceneEnvironment::antialiasingMode},
    \l{SceneEnvironment::temporalAAEnabled},
    \l{SceneEnvironment::temporalAAStrength}, and
    \l{SceneEnvironment::specularAAEnabled}.
 
    \image extendedsceneenvironment_aa.jpg
 
    \endlist
 
    \sa SceneEnvironment, {Qt Quick 3D - Scene Effects Example}
*/
 
// Depth of Field Effect
/*! \qmlproperty bool ExtendedSceneEnvironment::depthOfFieldEnabled
    Enables the depth of field blur effect.
 
    \default false
*/
/*! \qmlproperty real ExtendedSceneEnvironment::depthOfFieldFocusDistance
    Sets the distance from the camera at which objects are in focus.
 
    \default 600
 
    Here the
    \l{https://github.com/KhronosGroup/glTF-Sample-Models/tree/master/2.0/Sponza}{Sponza}
    scene has a scale of \c 100 applied in order to have a suitably big range
    to get blur applied to the back and the front of the view. The picture
    below is taken with a focus distance of 753 and a focus range of 482.
 
    \image extendedsceneenvironment_dof.jpg
*/
/*! \qmlproperty real ExtendedSceneEnvironment::depthOfFieldFocusRange
    The distance around the \l
    {ExtendedSceneEnvironment::depthOfFieldFocusDistance}{depthOfFieldFocusDistance}
    where items are fully in focus. The focus then fades away to fully blurred
    by the same distance on both the near and far sides.
 
    \default 100
*/
/*! \qmlproperty real ExtendedSceneEnvironment::depthOfFieldBlurAmount Sets the
    amount of blur applied to objects outside the focus range. Sensible values are
    in the range \b 0 to \b 10. A value of 0 applies no additional blur.
 
    \default 4.0
 
    \table
    \header
    \li Blur amount of 0
    \li Blur amount of 15
    \row
    \li \image extendedsceneenvironment_dof_no_blur.jpg
    \li \image extendedsceneenvironment_dof_15_blur.jpg
    \endtable
*/
// Tonemapper
/*!
    \qmlproperty enumeration ExtendedSceneEnvironment::tonemapMode
 
    This property defines how colors are tonemapped before rendering. All
    rendering in Qt Quick 3D is performed in linear color space and can in
    many cases lead to generating color values that are not displayable. The
    tonemapMode determines the technique that is used to remap colors into a
    displayable range.
 
    The default value is \c SceneEnvironment.TonemapModeLinear
 
    \value SceneEnvironment.TonemapModeNone
        All Tonemapping is bypassed. This mode is useful when performing post
        processing effects.
    \value SceneEnvironment.TonemapModeLinear
        Linear tonemapping is applied. Colors are gamma corrected and returned
        in sRGB color space.
    \value SceneEnvironment.TonemapModeAces
        Academy Color Encoding System tonemapping is applied.
    \value SceneEnvironment.TonemapModeHejlDawson
        Hejl-Dawson tonemapping is applied.
    \value SceneEnvironment.TonemapModeFilmic
        Filmic tonemapping is applied.
 
    \note When using post-processing effects, many effects expect untonemapped
    linear color data. It is important to bypass the built-in tonemapping in
    this case by using the \c SceneEnvironment.TonemapModeNone value. This does
    not apply to the built-in effects of ExtendedSceneEnvironment because those
    automatically take care of proper tonemapping.
 
    \table
    \header
    \li Tonemap mode
    \li Example
    \row
    \li None
    \li \image extendedsceneenvironment_tonemap_none.jpg
    \row
    \li Linear
    \li \image extendedsceneenvironment_tonemap_linear.jpg
    \row
    \li Aces
    \li \image extendedsceneenvironment_tonemap_aces.jpg
    \row
    \li HejlDawson
    \li \image extendedsceneenvironment_tonemap_hejldawson.jpg
    \row
    \li Filmic
    \li \image extendedsceneenvironment_tonemap_filmic.jpg
    \endtable
*/
/*! \qmlproperty real ExtendedSceneEnvironment::exposure
    Exposure level used by the tonemapper.
 
    \default 1.0
 
    \table
    \header
    \li Filmic tonmapping with exposure 8
    \li Filmic tonmapping with exposure set to 0.5
    \row
    \li \image extendedsceneenvironment_tonemap_exposure_8.jpg
    \li \image extendedsceneenvironment_tonemap_exposure_05.jpg
    \endtable
*/
/*! \qmlproperty real ExtendedSceneEnvironment::whitePoint
 
    Reference value for \e white when tonemapping is enabled. The value must be
    larger than 0.
 
    \note This value is ignored when using \l{SceneEnvironment::tonemapMode}{SceneEnvironment.TonemapModeLinear}.
 
    \default 1
 
    \table
    \header
    \li Filmic tonmapping with white point set to 0.1
    \li Filmic tonmapping with white point set to 1
    \row
    \li \image extendedsceneenvironment_tonemap_whitepoint_01.jpg
    \li \image extendedsceneenvironment_tonemap_whitepoint_1.jpg
    \endtable
*/
/*! \qmlproperty bool ExtendedSceneEnvironment::ditheringEnabled
    Enables dithering to reduce banding artifacts.
 
    \default false
*/
/*! \qmlproperty real ExtendedSceneEnvironment::sharpnessAmount
    Set the sharpening amount. Valid values are from \c 0.0 (off) to \c 1.0 (full).
 
    \default 0.0
 
    \table
    \header
    \li Filmic tonmapping with sharpness set to 0
    \li Filmic tonmapping with sharpness set to 1
    \row
    \li \image extendedsceneenvironment_tonemap_sharpness_0.jpg
    \li \image extendedsceneenvironment_tonemap_sharpness_1.jpg
    \endtable
*/
// FXAA
/*! \qmlproperty bool ExtendedSceneEnvironment::fxaaEnabled
    Enables fast approximate anti-aliasing (FXAA).
 
    \table
    \header
    \li FXAA disabled
    \li FXAA enabled
    \row
    \li \image extendedsceneenvironment_without_fxaa.jpg
    \li \image extendedsceneenvironment_with_fxaa.jpg
    \endtable
 
    \default false
*/
// Adjustments
/*! \qmlproperty bool ExtendedSceneEnvironment::colorAdjustmentsEnabled
 
    Enables color adjustments.
 
    \default false
    \sa {ExtendedSceneEnvironment::colorAdjustmentsEnabled}{colorAdjustmentsEnabled}
*/
/*! \qmlproperty real ExtendedSceneEnvironment::adjustmentBrightness
    Adjusts the brightness of the scene.
 
    \table
    \header
    \li Brightness of 1
    \li Brightness of 4
    \row
    \li \image extendedsceneenvironment_brightness_contrast_saturation_at_1.jpg
    \li \image extendedsceneenvironment_brightness_at_4.jpg
    \endtable
 
    \default 1
*/
/*! \qmlproperty real ExtendedSceneEnvironment::adjustmentContrast
    Adjusts the contrast of the scene.
 
    \table
    \header
    \li Contrast of 1
    \li Contrast of 4
    \row
    \li \image extendedsceneenvironment_brightness_contrast_saturation_at_1.jpg
    \li \image extendedsceneenvironment_contrast_at_4.jpg
    \endtable
 
    \default 1
*/
/*! \qmlproperty real ExtendedSceneEnvironment::adjustmentSaturation
    Adjusts the saturation of the scene.
 
    \table
    \header
    \li Saturation of 1
    \li Saturation of 4
    \row
    \li \image extendedsceneenvironment_brightness_contrast_saturation_at_1.jpg
    \li \image extendedsceneenvironment_saturation_at_4.jpg
    \endtable
 
    \default 1
*/
// Color Grading Effect
/*! \qmlproperty bool ExtendedSceneEnvironment::lutEnabled
    Enables color grading with look-up tables (LUTs).
    The look-up table is given as a texture.
 
    \default false
*/
/*! \qmlproperty real ExtendedSceneEnvironment::lutSize
    Sets the size of the LUT texture. The texture should have the dimensions:
 
    \c {width = lutSize * lutSize}
    and
    \c {height = lutSize}
 
    \default 16
*/
/*! \qmlproperty real ExtendedSceneEnvironment::lutFilterAlpha
    Sets the amount of color grading to mix with the scene.
    The value is expected to be between \b 0 and \b 1.
 
    \default 1
*/
/*! \qmlproperty Texture ExtendedSceneEnvironment::lutTexture
    Source of look-up texture. If no texture is set a built-in identity
    table is used.
 
    Pictured below is an example texture with a size of 256x16, matching the
    default \l lutSize of 16.
 
    \image extendedsceneenvironment_lut_texture_used_for_invert.jpg
 
    The result of this effect:
 
    \image extendedsceneenvironment_lut_invert.jpg
*/
// Glow Effect
/*! \qmlproperty bool ExtendedSceneEnvironment::glowEnabled
    Enables the glow effect. It can also provide bloom, when the value of \l
    glowBloom is larger than 0.
 
    \default false
*/
/*! \qmlproperty bool ExtendedSceneEnvironment::glowQualityHigh
    Increases the samples used for the glow when downsampling to improve the
    quality of the glow effect.
 
    \default false
 
    \note Enabling this is a trade off between rendering quality and performance. Consider if
    \l {ExtendedSceneEnvironment::ditheringEnabled}{dithering} can be used instead.
*/
/*! \qmlproperty bool ExtendedSceneEnvironment::glowUseBicubicUpscale
    Reduces the aliasing artifacts and boxing in the glow effect.
 
    \default false
 
    \note Using bi-cubic up-scaling will come at the cost of performance.  Consider if
    \l {ExtendedSceneEnvironment::ditheringEnabled}{dithering} can be used instead.
*/
/*! \qmlproperty real ExtendedSceneEnvironment::glowStrength
    Glow strength. Acceptable values are from \b 0 to \b 2.
 
    The strength is effectively a scale factor (multiplier) that is applied
    per-level. This means the the more levels are enabled in \l glowLevel, the
    more pronounced effect a larger glowStrength has.
 
    In practice the values for \l glowStrength, \l glowIntensity, and \l
    glowBloom will often be tuned together to achieve the desired results.
 
    \default 1
 
    For example, with a glowIntensity of 1.0, glowBloom of 0.25, and the
    first four levels enabled:
 
    \table
    \header
    \li glowStrength of 0.5
    \li glowStrength of 1.5
    \row
    \li \image extendedsceneenvironment_glow_strength_05.jpg
    \li \image extendedsceneenvironment_glow_strength_15.jpg
    \endtable
 
*/
/*! \qmlproperty real ExtendedSceneEnvironment::glowIntensity
    Glow intensity. Expected values are in the range \b 0 to \b 8.
 
    The intensity is effectively a scale factor (multiplier) for the
    accumulated glow color (including all levels).
 
    In practice the values for \l glowStrength, \l glowIntensity, and \l
    glowBloom will often be tuned together to achieve the desired results.
 
    \default 1
 
    For example, with a glowStrength of 1.0 and glowBloom of 0.25:
 
    \table
    \header
    \li glowIntensity of 0.25
    \li glowIntensity of 1.25
    \row
    \li \image extendedsceneenvironment_glow_intensity_025.jpg
    \li \image extendedsceneenvironment_glow_intensity_125.jpg
    \endtable
*/
/*! \qmlproperty real ExtendedSceneEnvironment::glowBloom
    Sets the amount of bloom applied to the glow effect.
    Values from \b 0 to \b 1 are expected.
 
    The \l glowHDRMinimumValue, \l glowHDRMaximumValue, \l glowHDRScale, and \l
    glowBloom values together control the amount of \c{luminance feedback}
    generated by the glow/bloom effect.
 
    \default 0
 
    In practice the values for \l glowStrength, \l glowIntensity, and \l
    glowBloom will often be tuned together to achieve the desired results.
 
    For example, with four glow levels enabled, a strength of 1.5, and an
    intensity of 1:
 
    \table
    \header
    \li glowBloom set to 0
    \li glowBloom set to 0.5
    \row
    \li \image extendedsceneenvironment_glow_level4_strength15_intensity1_bloom0.jpg
    \li \image extendedsceneenvironment_glow_level4_strength15_intensity1_bloom05.jpg
    \endtable
*/
/*! \qmlproperty int ExtendedSceneEnvironment::glowBlendMode
    Blending mode for the glow effect.
 
    Available modes are:
     \list
      \li ExtendedSceneEnvironment.GlowBlendMode.Additive
      \li ExtendedSceneEnvironment.GlowBlendMode.Screen
      \li ExtendedSceneEnvironment.GlowBlendMode.SoftLight
      \li ExtendedSceneEnvironment.GlowBlendMode.Replace
    \endlist
 
    \default ExtendedSceneEnvironment.GlowBlendMode.SoftLight
 
    \c Additive is often recommendable for outdoor scenes, where a sky or sun
    is visible, whereas the default \c SoftLight may work better for in-door
    environments.
 
    \c Replace does not perform any blending, but rather results in displaying
    only the contribution the glow/bloom effect would blend with the actual
    content. In practice this can be useful for experimenting and
    troubleshooting when setting up the parameters of a glow/bloom effect.
 
    \table
    \header
    \li Blend mode
    \li Example
    \row
    \li Glow disabled
    \li \image extendedsceneenvironment_glow_disabled.jpg
    \row
    \li Additive
    \li \image extendedsceneenvironment_glow_additive.jpg
    \row
    \li Screen
    \li \image extendedsceneenvironment_glow_screen.jpg
    \row
    \li SoftLight
    \li \image extendedsceneenvironment_glow_softlight.jpg
    \row
    \li Replace
    \li \image extendedsceneenvironment_glow_replace.jpg
    \endtable
*/
/*! \qmlproperty real ExtendedSceneEnvironment::glowHDRMaximumValue
    Sets the maximum brightness of the glow, in high dynamic range.
    Value range is from \b 0 to \b 256.
 
    The \l glowHDRMinimumValue, \l glowHDRMaximumValue, \l glowHDRScale, and \l
    glowBloom values together control the amount of \c{luminance feedback}
    generated by the glow/bloom effect.
 
    \default 12.0
*/
/*! \qmlproperty real ExtendedSceneEnvironment::glowHDRMinimumValue
    Sets the minimum brightness of the glow, in high dynamic range.
    Expected values are in the range \b 0 to \b 4.
 
    The \l glowHDRMinimumValue, \l glowHDRMaximumValue, \l glowHDRScale, and \l
    glowBloom values together control the amount of \c{luminance feedback}
    generated by the glow/bloom effect.
 
    \default 1.0
*/
/*! \qmlproperty real ExtendedSceneEnvironment::glowHDRScale
    The bleed scale of the HDR glow.
    Expected values are in the range \b 0 to \b 8.
 
    The \l glowHDRMinimumValue, \l glowHDRMaximumValue, \l glowHDRScale, and \l
    glowBloom values together control the amount of \c{luminance feedback}
    generated by the glow/bloom effect.
 
    \default 2.0
*/
/*! \qmlproperty int ExtendedSceneEnvironment::glowLevel
    Sets which of the blur passes get applied to the glow effect. There are a
    total of 7 levels available.
 
    Not having any levels set means that the glow will have no visual effect.
 
    For example, to enable Glow Level \e One and \e Six we just OR the two enums together:
    \badcode
        glowLevel = (ExtendedSceneEnvironment.GlowLevel.One | ExtendedSceneEnvironment.GlowLevel.Six)
    \endcode
 
    \default 1
 
    \table
    \header
    \li glowLevel value
    \li Example
    \row
    \li One
    \li \image extendedsceneenvironment_glow_levels_1.jpg
    \row
    \li One | Two
    \li \image extendedsceneenvironment_glow_levels_1_2.jpg
    \row
    \li One | Two | Three
    \li \image extendedsceneenvironment_glow_levels_1_2_3.jpg
    \row
    \li One | Two | Three | Four
    \li \image extendedsceneenvironment_glow_levels_1_2_3_4.jpg
    \endtable
*/
 
*/
// Vignette
/*! \qmlproperty bool ExtendedSceneEnvironment::vignetteEnabled
    Enables the vignette effect.
 
    \default false
*/
/*! \qmlproperty real ExtendedSceneEnvironment::vignetteStrength
    Sets the strength of the vignette effect. Ranges from \b 0 to \b 15.
 
    \default 15
 
    \table
    \header
    \li Strength of 15
    \li Strength of 10
    \row
    \li \image extendedsceneenvironment_vignette_strength_15.jpg
    \li \image extendedsceneenvironment_vignette_strength_10.jpg
    \endtable
*/
/*! \qmlproperty color ExtendedSceneEnvironment::vignetteColor
    Sets the color of the vignette effect.
 
    \default "gray"
 
    For example, changing the color to red, pictured here with radius 4 and
    strength 15:
 
    \image extendedsceneenvironment_vignette_red.jpg
*/
/*! \qmlproperty real ExtendedSceneEnvironment::vignetteRadius
    Sets the radius of the vignette effect. Ranges from \b 0 to \b 5.
 
    \default 0.35
 
    \table
    \header
    \li Radius of 0.35
    \li Radius of 5.0
    \row
    \li \image extendedsceneenvironment_vignette_radius_default.jpg
    \li \image extendedsceneenvironment_vignette_radius_5.jpg
    \endtable
*/
// Lens Flare
/*! \qmlproperty bool ExtendedSceneEnvironment::lensFlareEnabled
    Enables the lens flare effect.
 
    Once enabled, the first property to tune is typically \l
    lensFlareBloomBias.
 
    \default false
*/
/*! \qmlproperty real ExtendedSceneEnvironment::lensFlareBloomScale
    Sets the scale of the lens flare bloom effect. Expected scale value ranges
    from \b 0 to \b 20.
 
    In practice this acts as a multiplier for the zero-clamped color value with
    the \l lensFlareBloomBias subtracted.
 
    \default 10
 
    \table
    \header
    \li Scale 2, bias 0.81
    \li Scale 20, bias 0.81
    \row
    \li \image extendedsceneenvironment_lensflare_scale_2_bias_081.jpg
    \li \image extendedsceneenvironment_lensflare_scale_20_bias_081.jpg
    \endtable
*/
/*! \qmlproperty real ExtendedSceneEnvironment::lensFlareBloomBias
    Sets the level at which the lens flare bloom starts.
 
    The bias value is subtracted from the high dynamic range color value, with
    the result clamped to 0. This means that, depending on the scene, it may
    sometimes need be set to a quite low value, e.g. below 1, in order to make
    the lens flare obvious. Hence the default of 0.95. Whereas when having a
    higher range of colors, a bigger value may make more sense.
 
    \default 0.95
 
    \table
    \header
    \li Bias of 0.81
    \li Bias of 0.31
    \row
    \li \image extendedsceneenvironment_lensflare_bias_081.jpg
    \li \image extendedsceneenvironment_lensflare_bias_031.jpg
    \endtable
*/
/*! \qmlproperty real ExtendedSceneEnvironment::lensFlareGhostDispersal
    Sets the distance between the lens flare ghosts. Expected values are
    between \b 0 and \b 5. The value should be larger than 0.
 
    \default 0.5
 
    \table
    \header
    \li Ghost dispersal of 0.25
    \li Ghost dispersal of 0.90
    \row
    \li \image extendedsceneenvironment_lensflare_ghostdispersal_025.jpg
    \li \image extendedsceneenvironment_lensflare_ghostdispersal_090.jpg
    \endtable
*/
/*! \qmlproperty int ExtendedSceneEnvironment::lensFlareGhostCount
    Sets the amount of lens flare ghosts. Expected values are from \b 0 to \b 20.
 
    \default 4
 
    \table
    \header
    \li Ghost count of 2
    \li Ghost count of 16
    \row
    \li \image extendedsceneenvironment_lensflare_ghostcount_2.jpg
    \li \image extendedsceneenvironment_lensflare_ghostcount_16.jpg
    \endtable
*/
/*! \qmlproperty real ExtendedSceneEnvironment::lensFlareHaloWidth
    Sets the size of the lens flare halo. Ranges from \b 0 to \b 1.
 
    \default 0.25
*/
/*! \qmlproperty real ExtendedSceneEnvironment::lensFlareStretchToAspect
    Set correction factor for roundness of the lens flare halo.
 
    \default 0.5 [0, 1]
*/
/*! \qmlproperty real ExtendedSceneEnvironment::lensFlareDistortion
    Set amount of chromatic aberration in the lens flare. Expected values
    ranges from \b 0 to \b 20.
 
    \default 5
 
    \table
    \header
    \li Distortion set to 0
    \li Distortion set to 15
    \row
    \li \image extendedsceneenvironment_lensflare_distortion_0.jpg
    \li \image extendedsceneenvironment_lensflare_distortion_15.jpg
    \endtable
*/
/*! \qmlproperty real ExtendedSceneEnvironment::lensFlareBlurAmount
    Set amount of blur to apply to the lens flare. Ranges from \b 0 to \b 50.
 
    \default 3
 
    \table
    \header
    \li Blur amount set to 0
    \li Blur amount set to 30
    \row
    \li \image extendedsceneenvironment_lensflare_0_blur.jpg
    \li \image extendedsceneenvironment_lensflare_30_blur.jpg
    \endtable
 
*/
/*! \qmlproperty bool ExtendedSceneEnvironment::lensFlareApplyDirtTexture
    Set whether to apply a dirt texture to the lens flare.
 
    \default false
 
    \table
    \header
    \li Dirt texture disabled
    \li Default dirty texture enabled
    \row
    \li \image extendedsceneenvironment_lensflare_dirt_off.jpg
    \li \image extendedsceneenvironment_lensflare_dirt_on.jpg
    \endtable
 
    \sa {ExtendedSceneEnvironment::lensFlareLensDirtTexture}{lensFlareLensDirtTexture}
*/
/*! \qmlproperty bool ExtendedSceneEnvironment::lensFlareApplyStarburstTexture
    Set whether to apply a starburst texture to the lens flare.
 
    \default false
 
    \table
    \header
    \li Starburst texture disabled
    \li Default starburst texture enabled
    \row
    \li \image extendedsceneenvironment_lensflare_starburst_off.jpg
    \li \image extendedsceneenvironment_lensflare_starburst_on.jpg
    \endtable
 
    \sa {ExtendedSceneEnvironment::lensFlareLensStarburstTexture}{lensFlareLensStarburstTexture}
*/
/*! \qmlproperty vector3d ExtendedSceneEnvironment::lensFlareCameraDirection
    Sets the direction of the camera in the scene.
 
    \default Qt.vector3d(0, 0, -1)
*/
/*! \qmlproperty Texture ExtendedSceneEnvironment::lensFlareLensColorTexture
    A gradient image used for the lens flare lens color.
 
    By default a built-in 256x256 texture is used:
 
    \image extendedsceneenvironment_lensflare_default_texture.jpg
 */
/*! \qmlproperty Texture ExtendedSceneEnvironment::lensFlareLensDirtTexture
    An image that is used to simulate inperfections on the lens.
 
    Has an effect only when \l lensFlareApplyDirtTexture is enabled.
 
    By default a built-in dirty texture is used:
 
    \image extendedsceneenvironment_lensflare_default_dirt.jpg
 */
/*! \qmlproperty Texture ExtendedSceneEnvironment::lensFlareLensStarburstTexture
    A noise image to augment the starburst effect of the lens flare.
    Has an effect only when \l lensFlareApplyStarburstTexture is enabled.
 
    By default a built-in noise texture is used:
 
    \image extendedsceneenvironment_lensflare_default_noise.jpg
*/