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| ** |
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| ** This file is part of Qt Quick 3D. |
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| |
| #include "qquick3dfrustumcamera_p.h" |
| |
| #include <QtQuick3DRuntimeRender/private/qssgrendercamera_p.h> |
| |
| #include <QtMath> |
| #include <QtQuick3DUtils/private/qssgutils_p.h> |
| |
| #include "qquick3dutils_p.h" |
| |
| QT_BEGIN_NAMESPACE |
| |
| /*! |
| \qmltype FrustumCamera |
| \inherits PerspectiveCamera |
| \inqmlmodule QtQuick3D |
| \brief Defines a Perspective Frustum Camera for viewing the content of a 3D scene. |
| |
| A Camera is always necessary to view the content of a 3D scene. A camera |
| defines how to project the content of a 3D scene into a 2D coordinate space, |
| which can then be used on a 2D surface. When a camera is present in the scene |
| it can be used to direct what is displayed in a View3D. |
| |
| To determine the projection of this camera a high level API is provided. |
| First it is possible to position this Camera like any other spatial Node in |
| the scene. This determines where the Camera is in the scene, and what |
| direction it is facing. The default direction of the camera is such that the |
| forward vector is looking up the +Z axis, and the up direction vector is up |
| the +Y axis. With this in mind any transformation applied to the camera as |
| well as the transformations inherited from it's parent Nodes you can define |
| exactly where and in what direction your camera is facing. |
| |
| For finer grain control of how the frustum is defined, this is the camera to use. |
| FrustumCamera allows for setting the FrustumCamera::top, FrustumCamera::bottom, |
| FrustumCamera::right, and FrustumCamera::left properties. This is useful in |
| creating asymmetrical frustums. |
| |
| \sa PerspectiveCamera, OrthographicCamera, CustomCamera |
| */ |
| |
| /*! |
| * \internal |
| */ |
| QQuick3DFrustumCamera::QQuick3DFrustumCamera() {} |
| |
| /*! |
| \qmlproperty real FrustumCamera::top |
| |
| This property defines the top plane of the camera view frustum. |
| */ |
| float QQuick3DFrustumCamera::top() const |
| { |
| return m_top; |
| } |
| |
| /*! |
| \qmlproperty real FrustumCamera::bottom |
| |
| This property defines the bottom plane of the camera view frustum. |
| */ |
| float QQuick3DFrustumCamera::bottom() const |
| { |
| return m_bottom; |
| } |
| |
| /*! |
| \qmlproperty real FrustumCamera::right |
| |
| This property defines the right plane of the camera view frustum. |
| */ |
| float QQuick3DFrustumCamera::right() const |
| { |
| return m_right; |
| } |
| |
| /*! |
| \qmlproperty real FrustumCamera::left |
| |
| This property defines the left plane of the camera view frustum. |
| */ |
| 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(); |
| } |
| |
| /*! |
| * \internal |
| */ |
| QSSGRenderGraphObject *QQuick3DFrustumCamera::updateSpatialNode(QSSGRenderGraphObject *node) |
| { |
| if (!node) { |
| markAllDirty(); |
| node = new QSSGRenderCamera(); |
| } |
| |
| QQuick3DNode::updateSpatialNode(node); |
| |
| QSSGRenderCamera *camera = static_cast<QSSGRenderCamera *>(node); |
| camera->flags.setFlag(QSSGRenderNode::Flag::CameraFrustumProjection, true); |
| |
| bool changed = false; |
| changed |= qUpdateIfNeeded(camera->clipNear, clipNear()); |
| changed |= qUpdateIfNeeded(camera->clipFar, clipFar()); |
| changed |= qUpdateIfNeeded(camera->fov, qDegreesToRadians(fieldOfView())); |
| changed |= qUpdateIfNeeded(camera->fovHorizontal, fieldOfViewOrientation() |
| == QQuick3DCamera::FieldOfViewOrientation::Horizontal); |
| changed |= qUpdateIfNeeded(camera->enableFrustumClipping, frustumCullingEnabled()); |
| changed |= qUpdateIfNeeded(camera->top, m_top); |
| changed |= qUpdateIfNeeded(camera->bottom, m_bottom); |
| changed |= qUpdateIfNeeded(camera->right, m_right); |
| changed |= qUpdateIfNeeded(camera->left, m_left); |
| |
| setCameraNode(camera); |
| |
| if (changed) |
| camera->flags.setFlag(QSSGRenderNode::Flag::CameraDirty); |
| return node; |
| } |
| |
| QT_END_NAMESPACE |