Module javafx.graphics
Package javafx.scene

Class PerspectiveCamera

  • All Implemented Interfaces:
    Styleable, EventTarget

    public class PerspectiveCamera
extends Camera
    Specifies a perspective camera for rendering a scene.

    This camera defines a viewing volume for a perspective projection; a truncated right pyramid. The fieldOfView value can be used to change viewing volume. By default, this camera is located at center of the scene and looks along the positive z-axis. The coordinate system defined by this camera has its origin in the upper left corner of the panel with the Y-axis pointing down and the Z axis pointing away from the viewer (into the screen). If a PerspectiveCamera node is added to the scene graph, the transformed position and orientation of the camera will define the position of the camera and the direction that the camera is looking.

    In the default camera, where fixedEyeAtCameraZero is false, the Z value of the eye position is adjusted in Z such that the projection matrix generated using the specified fieldOfView will produce units at Z = 0 (the projection plane), in device-independent pixels, matches that of the ParallelCamera. When the Scene is resized, the objects in the scene at the projection plane (Z = 0) will stay the same size, but more or less content of the scene is viewable.

    If fixedEyeAtCameraZero is true, the eye position is fixed at (0, 0, 0) in the local coordinates of the camera. The projection matrix is generated using the specified fieldOfView and the projection volume is mapped onto the viewport (window) such that it is stretched over more or fewer device-independent pixels at the projection plane. When the Scene is resized, the objects in the scene will shrink or grow proportionally, but the visible portion of the content is unchanged.

    We recommend setting fixedEyeAtCameraZero to true if you are going to transform (move) the camera. Transforming the camera when fixedEyeAtCameraZero is set to false may lead to results that are not intuitive.

    Note that this is a conditional feature. See ConditionalFeature.SCENE3D for more information.

    Since:
    JavaFX 2.0

    • Constructor Detail

      • PerspectiveCamera

        public PerspectiveCamera​()
        Creates an empty instance of PerspectiveCamera.

      • PerspectiveCamera

        public PerspectiveCamera​(boolean fixedEyeAtCameraZero)
        Constructs a PerspectiveCamera with the specified fixedEyeAtCameraZero flag.

        In the default camera, where fixedEyeAtCameraZero is false, the Z value of the eye position is adjusted in Z such that the projection matrix generated using the specified fieldOfView will produce units at Z = 0 (the projection plane), in device-independent pixels, matches that of the ParallelCamera. When the Scene is resized, the objects in the scene at the projection plane (Z = 0) will stay the same size, but more or less content of the scene is viewable.

        If fixedEyeAtCameraZero is true, the eye position is fixed at (0, 0, 0) in the local coordinates of the camera. The projection matrix is generated using the specified fieldOfView and the projection volume is mapped onto the viewport (window) such that it is stretched over more or fewer device-independent pixels at the projection plane. When the Scene is resized, the objects in the scene will shrink or grow proportionally, but the visible portion of the content is unchanged.

        We recommend setting fixedEyeAtCameraZero to true if you are going to transform (move) the camera. Transforming the camera when fixedEyeAtCameraZero is set to false may lead to results that are not intuitive.

        Parameters:
        fixedEyeAtCameraZero - true if the the eye position is fixed at (0, 0, 0) in the local coordinates of the camera.
        Since:
        JavaFX 8.0

    • Method Detail

      • setFieldOfView

        public final void setFieldOfView​(double value)
        Sets the value of the property fieldOfView.
        Property description:
        Specifies the field of view angle of the camera's projection, measured in degrees.
        Default value:
        30.0

      • getFieldOfView

        public final double getFieldOfView​()
        Gets the value of the property fieldOfView.
        Property description:
        Specifies the field of view angle of the camera's projection, measured in degrees.
        Default value:
        30.0

      • setVerticalFieldOfView

        public final void setVerticalFieldOfView​(boolean value)
        Sets the value of the property verticalFieldOfView.
        Property description:
        Defines whether the fieldOfView property will apply to the vertical dimension of the projection. If it is false, fieldOfView will apply to the horizontal dimension of the projection.
        Default value:
        true
        Since:
        JavaFX 8.0

      • isVerticalFieldOfView

        public final boolean isVerticalFieldOfView​()
        Gets the value of the property verticalFieldOfView.
        Property description:
        Defines whether the fieldOfView property will apply to the vertical dimension of the projection. If it is false, fieldOfView will apply to the horizontal dimension of the projection.
        Default value:
        true
        Since:
        JavaFX 8.0

      • verticalFieldOfViewProperty

        public final BooleanProperty verticalFieldOfViewProperty​()
        Defines whether the fieldOfView property will apply to the vertical dimension of the projection. If it is false, fieldOfView will apply to the horizontal dimension of the projection.
        Default value:
        true
        Since:
        JavaFX 8.0
        See Also:
        isVerticalFieldOfView(), setVerticalFieldOfView(boolean)

      • isFixedEyeAtCameraZero

        public final boolean isFixedEyeAtCameraZero​()
        Returns a flag indicating whether this camera uses a fixed eye position at the origin of the camera. If fixedEyeAtCameraZero is true, the the eye position is fixed at (0, 0, 0) in the local coordinates of the camera. This attribute is immutable.
        Returns:
        a flag indicating whether this camera uses a fixed eye position at the origin of the camera
        Since:
        JavaFX 8.0