DirectX Media for Animation Java Reference

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PickableGeometryBvr Class

public class PickableGeometryBvr extends GeometryBvr {
    // Constructor
    public PickableGeometryBvr(GeometryBvr geo);

    // Method
    public DXMEvent getPickEvent();
}

Creates an object representing a pickable geometry behavior. The behavior is identical to a geometry behavior except that an event occurs whenever the mouse pointer is "in" the geometry.

Applets typically use the event returned by the getPickEvent method to set an event handler or to create a reactive behavior with the until or untilNotify method.

When the pick event occurs, the event data is a PairObject object. The first element is a Point3Bvr object representing the intersection point, and the second element is a Vector3Bvr object that is a time-varying vector. The vector gives the model-coordinate offset to the point that (from the camera's image plane) is in the plane perpendicular to the viewing direction, and is under the two-dimensional mouse's location.

Constructor

PickableGeometryBvr

public PickableGeometryBvr(GeometryBvr geo);

Creates a pickable geometry behavior.

Parameter	Description
geo	A new instance of a GeometryBvr that is pickable.

Methods

getPickEvent

public DXMEvent getPickEvent();

Creates an event for the pickable geometry behavior. Use this event to set an event handler or create a reactive behavior with the until or untilNotify method.

Return Value:

Returns a DXMEvent object. Its data is a PairObject. The first member is the intersection point that is in the plane perpendicular to the viewing direction and is under the mouse. The second member is a time-varying vector that gives the model-coordinate offset to the intersection point. Each sample taken while the mouse is over the object returns a new point and a new time-varying vector. Each time-varying vector tracks the mouse, relative to the associated intersection point.