com.sun.j3d.utils.pickfast

Class PickTool

java.lang.Object

com.sun.j3d.utils.pickfast.PickTool

Direct Known Subclasses:

PickCanvas

public class PickTool
extends Object

The base class for optimized picking operations. The picking methods will return a PickInfo object for each object picked, which can then be queried to obtain more detailed information about the specific objects that were picked.

The pick mode specifies the detail level of picking before the PickInfo is returned:

• PickInfo.PICK_BOUNDS - Pick using the only bounds of the pickable nodes.
• PickInfo.PICK_GEOMETRY will pick using the geometry of the pickable nodes. Geometry nodes in the scene must have the ALLOW_INTERSECT capability set for this mode.

The pick flags specifies the content of the PickInfo(s) returned by the pick methods. This is specified as one or more individual bits that are bitwise "OR"ed together to describe the PickInfo data. The flags include :

PickInfo.SCENEGRAPHPATH - request for computed SceneGraphPath.
PickInfo.NODE - request for computed intersected Node.
PickInfo.LOCAL_TO_VWORLD - request for computed local to virtual world transform.
PickInfo.CLOSEST_INTERSECTION_POINT - request for closest intersection point.
PickInfo.CLOSEST_DISTANCE - request for the distance of closest intersection.
PickInfo.CLOSEST_GEOM_INFO - request for only the closest intersection geometry information.
PickInfo.ALL_GEOM_INFO - request for all intersection geometry information.

When using pickAllSorted or pickClosest methods, the picks will be sorted by the distance from the start point of the pick shape to the intersection point.

See Also:

Locale.pickClosest(int,int,javax.media.j3d.PickShape)

Field Summary

Fields

Modifier and Type	Field and Description
static int	TYPE_BRANCH_GROUP Flag to pass to getNode(int) to return a BranchGroup node from the SceneGraphPath.
static int	TYPE_GROUP Flag to pass to getNode(int) to return a Group node from the SceneGraphPath.
static int	TYPE_LINK Flag to pass to getNode(int) to return a Link node from the SceneGraphPath.
static int	TYPE_MORPH Flag to pass to getNode(int) to return a Morph node from the SceneGraphPath.
static int	TYPE_PRIMITIVE Flag to pass to getNode(int) to return a Primitive node from the SceneGraphPath.
static int	TYPE_SHAPE3D Flag to pass to getNode(int) to return a Shape3D node from the SceneGraphPath.
static int	TYPE_SWITCH Flag to pass to getNode(int) to return a Switch node from the SceneGraphPath.
static int	TYPE_TRANSFORM_GROUP Flag to pass to getNode(int) to return a TransformGroup node from the SceneGraphPath.
protected boolean	userDefineShape

Constructor Summary

Constructors

Constructor and Description
PickTool(javax.media.j3d.BranchGroup b) Constructor with BranchGroup to be picked.
PickTool(javax.media.j3d.Locale l) Constructor with the Locale to be picked.

Method Summary

Methods

Modifier and Type	Method and Description
javax.media.j3d.BranchGroup	getBranchGroup() Returns the BranchGroup to be picked if the tool was initialized with a BranchGroup, null otherwise.
int	getFlags() Gets the PickInfo content flags.
javax.media.j3d.Locale	getLocale() Returns the Locale to be picked if the tool was initialized with a Locale, null otherwise.
int	getMode() Gets the picking detail mode.
javax.media.j3d.Node	getNode(javax.media.j3d.PickInfo pickInfo, int type) Get the first node of a certain type up the SceneGraphPath
javax.media.j3d.PickShape	getPickShape() Returns the PickShape for this object.
javax.vecmath.Point3d	getStartPosition() Returns the start postion used for distance measurement.
javax.media.j3d.PickInfo[]	pickAll() Selects all the nodes that intersect the PickShape.
javax.media.j3d.PickInfo[]	pickAllSorted() Select all the nodes that intersect the PickShape, returned sorted.
javax.media.j3d.PickInfo	pickAny() Select one of the nodes that intersect the PickShape
javax.media.j3d.PickInfo	pickClosest() Select the closest node that intersects the PickShape.
void	setFlags(int flags) Sets the PickInfo content flags.
void	setMode(int mode) Sets the picking detail mode.
void	setShape(javax.media.j3d.PickShape ps, javax.vecmath.Point3d startPt) Sets the pick shape to a user-provided PickShape object
void	setShapeBounds(javax.media.j3d.Bounds bounds, javax.vecmath.Point3d startPt) Sets the pick shape to use a user-provided Bounds object
void	setShapeConeRay(javax.vecmath.Point3d start, javax.vecmath.Vector3d dir, double angle) Sets the pick shape to an infinite PickCone.
void	setShapeConeSegment(javax.vecmath.Point3d start, javax.vecmath.Point3d end, double angle) Sets the pick shape to a capped PickCone
void	setShapeCylinderRay(javax.vecmath.Point3d start, javax.vecmath.Vector3d dir, double radius) Sets the pick shape to an infinite PickCylinder.
void	setShapeCylinderSegment(javax.vecmath.Point3d start, javax.vecmath.Point3d end, double radius) Sets the pick shape to a capped PickCylinder
void	setShapeRay(javax.vecmath.Point3d start, javax.vecmath.Vector3d dir) Sets the pick shape to a PickRay.
void	setShapeSegment(javax.vecmath.Point3d start, javax.vecmath.Point3d end) Sets the pick shape to a PickSegment.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

TYPE_SHAPE3D

public static final int TYPE_SHAPE3D

Flag to pass to getNode(int) to return a Shape3D node from the SceneGraphPath.

See Also:

Constant Field Values

TYPE_MORPH

public static final int TYPE_MORPH

Flag to pass to getNode(int) to return a Morph node from the SceneGraphPath.

See Also:

Constant Field Values

TYPE_PRIMITIVE

public static final int TYPE_PRIMITIVE

Flag to pass to getNode(int) to return a Primitive node from the SceneGraphPath.

See Also:

Constant Field Values

TYPE_LINK

public static final int TYPE_LINK

Flag to pass to getNode(int) to return a Link node from the SceneGraphPath.

See Also:

Constant Field Values

TYPE_GROUP

public static final int TYPE_GROUP

Flag to pass to getNode(int) to return a Group node from the SceneGraphPath.

See Also:

Constant Field Values

TYPE_TRANSFORM_GROUP

public static final int TYPE_TRANSFORM_GROUP

Flag to pass to getNode(int) to return a TransformGroup node from the SceneGraphPath.

See Also:

Constant Field Values

TYPE_BRANCH_GROUP

public static final int TYPE_BRANCH_GROUP

Flag to pass to getNode(int) to return a BranchGroup node from the SceneGraphPath.

See Also:

Constant Field Values

TYPE_SWITCH

public static final int TYPE_SWITCH

Flag to pass to getNode(int) to return a Switch node from the SceneGraphPath.

See Also:

Constant Field Values

userDefineShape

protected boolean userDefineShape

Constructor Detail

PickTool

public PickTool(javax.media.j3d.BranchGroup b)

Constructor with BranchGroup to be picked.

PickTool

public PickTool(javax.media.j3d.Locale l)

Constructor with the Locale to be picked.

Method Detail

getBranchGroup

public javax.media.j3d.BranchGroup getBranchGroup()

Returns the BranchGroup to be picked if the tool was initialized with a BranchGroup, null otherwise.

getLocale

public javax.media.j3d.Locale getLocale()

Returns the Locale to be picked if the tool was initialized with a Locale, null otherwise.

setShape

public void setShape(javax.media.j3d.PickShape ps,
            javax.vecmath.Point3d startPt)

Sets the pick shape to a user-provided PickShape object

Parameters:

ps - The pick shape to pick against.

startPt - The start point to use for distance calculations

setShapeBounds

public void setShapeBounds(javax.media.j3d.Bounds bounds,
                  javax.vecmath.Point3d startPt)

Sets the pick shape to use a user-provided Bounds object

Parameters:

bounds - The bounds to pick against.

startPt - The start point to use for distance calculations

setMode

public void setMode(int mode)

Sets the picking detail mode. The default is PickInfo.PICK_BOUNDS.

Parameters:

mode - One of PickInfo.PICK_BOUNDS or PickInfo.PICK_GEOMETRY.

Throws:

IllegalArgumentException - if mode is not a legal value

getMode

public int getMode()

Gets the picking detail mode.

setFlags

public void setFlags(int flags)

Sets the PickInfo content flags. The default is PickInfo.NODE.

Parameters:

flags - specified as one or more individual bits that are bitwise "OR"ed together :

PickInfo.SCENEGRAPHPATH - request for computed SceneGraphPath.
PickInfo.NODE - request for computed intersected Node.
PickInfo.LOCAL_TO_VWORLD - request for computed local to virtual world transform.
PickInfo.CLOSEST_INTERSECTION_POINT - request for closest intersection point.
PickInfo.CLOSEST_DISTANCE - request for the distance of closest intersection.
PickInfo.CLOSEST_GEOM_INFO - request for only the closest intersection geometry information.
PickInfo.ALL_GEOM_INFO - request for all intersection geometry information.

Throws:

IllegalArgumentException - if any other bits besides the above are set.

getFlags

public int getFlags()

Gets the PickInfo content flags.

setShapeRay

public void setShapeRay(javax.vecmath.Point3d start,
               javax.vecmath.Vector3d dir)

Sets the pick shape to a PickRay.

Parameters:

start - The start of the ray

dir - The direction of the ray

setShapeSegment

public void setShapeSegment(javax.vecmath.Point3d start,
                   javax.vecmath.Point3d end)

Sets the pick shape to a PickSegment.

Parameters:

start - The start of the segment

end - The end of the segment

setShapeCylinderSegment

public void setShapeCylinderSegment(javax.vecmath.Point3d start,
                           javax.vecmath.Point3d end,
                           double radius)

Sets the pick shape to a capped PickCylinder

Parameters:

start - The start of axis of the cylinder

end - The end of the axis of the cylinder

radius - The radius of the cylinder

setShapeCylinderRay

public void setShapeCylinderRay(javax.vecmath.Point3d start,
                       javax.vecmath.Vector3d dir,
                       double radius)

Sets the pick shape to an infinite PickCylinder.

Parameters:

start - The start of axis of the cylinder

dir - The direction of the axis of the cylinder

radius - The radius of the cylinder

setShapeConeSegment

public void setShapeConeSegment(javax.vecmath.Point3d start,
                       javax.vecmath.Point3d end,
                       double angle)

Sets the pick shape to a capped PickCone

Parameters:

start - The start of axis of the cone

end - The end of the axis of the cone

angle - The angle of the cone

setShapeConeRay

public void setShapeConeRay(javax.vecmath.Point3d start,
                   javax.vecmath.Vector3d dir,
                   double angle)

Sets the pick shape to an infinite PickCone.

Parameters:

start - The start of axis of the cone

dir - The direction of the axis of the cone

angle - The angle of the cone

getPickShape

public javax.media.j3d.PickShape getPickShape()

Returns the PickShape for this object.

getStartPosition

public javax.vecmath.Point3d getStartPosition()

Returns the start postion used for distance measurement.

pickAll

public javax.media.j3d.PickInfo[] pickAll()

Selects all the nodes that intersect the PickShape.

Returns:

An array of PickInfo objects which will contain information about the picked instances. null if nothing was picked.

pickAny

public javax.media.j3d.PickInfo pickAny()

Select one of the nodes that intersect the PickShape

Returns:

A PickInfo object which will contain information about the picked instance. null if nothing was picked.

pickAllSorted

public javax.media.j3d.PickInfo[] pickAllSorted()

Select all the nodes that intersect the PickShape, returned sorted. The "closest" object will be returned first. See note above to see how "closest" is determined.

Returns:

An array of PickInfo objects which will contain information about the picked instances. null if nothing was picked.

pickClosest

public javax.media.j3d.PickInfo pickClosest()

Select the closest node that intersects the PickShape. See note above to see how "closest" is determined.

Returns:

A PickInfo object which will contain information about the picked instance. null if nothing was picked.

getNode

public javax.media.j3d.Node getNode(javax.media.j3d.PickInfo pickInfo,
                           int type)

Get the first node of a certain type up the SceneGraphPath

Parameters:

type - the type of node we are interested in

Returns:

a Node object

Throws:

NullPointerException - if pickInfo does not contain a Scenegraphpath or a picked node