Class PerspectiveCamera

java.lang.Object
com.luciad.cameras.Camera
com.luciad.cameras.PerspectiveCamera
All Implemented Interfaces:
AutoCloseable

public final class PerspectiveCamera extends Camera implements AutoCloseable
A camera that uses an perspective projection.

Also known as a pinhole camera.

The Camera API is a low-level API. For simple map navigation use cases, it's recommended to use the higher-level API. The MapNavigator API works in both 2D and 3D, on all map references. If you use the low-level Camera API, keep in mind that the same camera manipulation implementation might not work for other types of cameras (OrthographicCamera vs PerspectiveCamera) or other (types of) map references (projected vs. geocentric).

A camera transforms points from the map reference to the view (device independent pixel coordinates).

Besides the position, orientation and size properties that it inherits from Camera, the perspective camera defines its projection using a field of view: the angle, in degrees, that determines the vertical viewing angle of the camera. The horizontal field-of-view angle can be derived from the vertical field-of-view and the camera's aspect ratio.

Perspective Camera
Perspective Camera

Cameras in LuciadCPillar are immutable. You can manipulate the map's camera by creating a modified copy using the builder. The new camera can then be set on the map.

Currently, the PerspectiveCamera is only used in combination with geocentric (3D) map references (aka 3D maps). For now, you cannot use this camera if the map has a projected (grid) reference.

To manipulate a perspective camera in a geocentric reference, consider using lookAt or lookFrom. This allows you to reason about the camera in terms of yaw (angle from north direction), pitch (angle wrt. horizon) and roll. You could also just manipulate the camera's eye position and forward/up directions directly, if that's a better fit for your use case.

Map navigation constraints configured on MapNavigator are not enforced when this camera is updated on the map. Constraints are only respected when using MapNavigator.

Example:

// low-level manipulation of perspective camera: put camera looking over Europe, faced towards the north
var perspectiveCamera = (PerspectiveCamera) map.getCamera();
Camera.Look newCameraPosition = new Camera.Look(
new Coordinate(6214861.581912037, 710226.7751339739, 4927634.769711619),
new Coordinate(0.9588725076044676, -0.12713997961061635, -0.25376946180526144),
new Coordinate(-0.2469197372006221, -0.06727846255744102, 0.9666976010400992)
);
Camera newCamera = perspectiveCamera.asBuilder().look(newCameraPosition).build();
// ...
// Set the camera on the map, for example by using Map#getAnimationManager
map.setCamera(newCamera);
  • Method Details Link icon

    • finalize Link icon

      protected void finalize()
      Overrides:
      finalize in class Camera
    • close Link icon

      public void close()
      Specified by:
      close in interface AutoCloseable
      Overrides:
      close in class Camera
    • asBuilder Link icon

      @NotNull public PerspectiveCamera.Builder asBuilder()
      Returns a Builder that is initially configured to build cameras identical to this camera.

      You can then change a subset of the camera properties using this builder to create a new camera.

      Returns:
      a Builder that is initially configured to build cameras identical to this camera.
    • getFovY Link icon

      @NotNull public Angle getFovY()
      Returns the vertical field of view of the camera.
      Returns:
      the vertical field of view of the camera.
      See Also:
    • asLook Link icon

      @NotNull public Camera.Look asLook()
      Returns the position and orientation of the camera.
      Returns:
      the position and orientation of the camera.
    • asLookAt Link icon

      @NotNull public Camera.LookAt asLookAt(double distance)
      Returns a LookAt that matches the position and orientation of this camera.
      Returns:
      a LookAt that matches the position and orientation of this camera.
    • asLookFrom Link icon

      @NotNull public Camera.LookFrom asLookFrom()
      Returns a LookFrom that matches the position and orientation of this camera.
      Returns:
      a LookFrom that matches the position and orientation of this camera.