javax.media.j3d
Class OrientedShape3D

java.lang.Object
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  +--javax.media.j3d.SceneGraphObject
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        +--javax.media.j3d.Node
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              +--javax.media.j3d.Leaf
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                    +--javax.media.j3d.Shape3D
                          |
                          +--javax.media.j3d.OrientedShape3D

public class OrientedShape3D

extends Shape3D

The OrientedShape3D leaf node is a Shape3D node that is oriented along a specified axis or about a specified point. It defines an alignment mode and a rotation point or axis. This will cause the local +z axis of the object to point at the viewer's eye position. This is done regardless of the transforms above this OrientedShape3D node in the scene graph. It optionally defines a scale value along with a constant scale enable flag that causes this node to be scale invariant, subject only to its scale.

OrientedShape3D is similar in functionality to the Billboard behavior, but OrientedShape3D nodes will orient themselves correctly for each view, and they can be used within a SharedGroup.

If the alignment mode is ROTATE_ABOUT_AXIS, then the rotation will be around the specified axis. If the alignment mode is ROTATE_ABOUT_POINT, then the rotation will be about the specified point, with an additional rotation to align the +y axis of the TransformGroup with the +y axis in the View.

If the constant scale enable flag is set, the object will be drawn the same size in absolute screen coordinates (meters), regardless of the following: any transforms above this OrientedShape3D node in the scene graph, the view scale, the window scale, or the effects of perspective correction. This is done by scaling the geometry about the local origin of this node, such that 1 unit in local coordinates is equal to the number of meters specified by this node's scale value. If the constant scale enable flag is set to false, then the scale is not used. The default scale is 1.0 meters.

OrientedShape3D nodes are ideal for drawing screen-aligned text or for drawing roughly-symmetrical objects. A typical use might consist of a quadrilateral that contains a texture of a tree.

Since:

Java 3D 1.2

See Also:

Billboard

Field Summary

static int	ALLOW_AXIS_READ Specifies that this OrientedShape3D node allows reading its alignment axis information.
static int	ALLOW_AXIS_WRITE Specifies that this OrientedShape3D node allows writing its alignment axis information.
static int	ALLOW_MODE_READ Specifies that this OrientedShape3D node allows reading its alignment mode information.
static int	ALLOW_MODE_WRITE Specifies that this OrientedShape3D node allows writing its alignment mode information.
static int	ALLOW_POINT_READ Specifies that this OrientedShape3D node allows reading its rotation point information.
static int	ALLOW_POINT_WRITE Specifies that this OrientedShape3D node allows writing its rotation point information.
static int	ALLOW_SCALE_READ Specifies that this OrientedShape3D node allows reading its scale and constant scale enable information.
static int	ALLOW_SCALE_WRITE Specifies that this OrientedShape3D node allows writing its scale and constant scale enable information.
static int	ROTATE_ABOUT_AXIS Specifies that rotation should be about the specified axis.
static int	ROTATE_ABOUT_POINT Specifies that rotation should be about the specified point and that the children's Y-axis should match the view object's Y-axis.
static int	ROTATE_NONE Specifies that no rotation is done.

Fields inherited from class javax.media.j3d.Shape3D

ALLOW_APPEARANCE_OVERRIDE_READ, ALLOW_APPEARANCE_OVERRIDE_WRITE, ALLOW_APPEARANCE_READ, ALLOW_APPEARANCE_WRITE, ALLOW_COLLISION_BOUNDS_READ, ALLOW_COLLISION_BOUNDS_WRITE, ALLOW_GEOMETRY_READ, ALLOW_GEOMETRY_WRITE

Fields inherited from class javax.media.j3d.Node

ALLOW_AUTO_COMPUTE_BOUNDS_READ, ALLOW_AUTO_COMPUTE_BOUNDS_WRITE, ALLOW_BOUNDS_READ, ALLOW_BOUNDS_WRITE, ALLOW_COLLIDABLE_READ, ALLOW_COLLIDABLE_WRITE, ALLOW_LOCAL_TO_VWORLD_READ, ALLOW_PICKABLE_READ, ALLOW_PICKABLE_WRITE, ENABLE_COLLISION_REPORTING, ENABLE_PICK_REPORTING

Constructor Summary

OrientedShape3D()
Constructs an OrientedShape3D node with default parameters.

OrientedShape3D(Geometry geometry, Appearance appearance, int mode, Point3f point)
Constructs an OrientedShape3D node with the specified geometry component, appearance component, mode, and rotation point.

OrientedShape3D(Geometry geometry, Appearance appearance, int mode, Point3f point, boolean constantScaleEnable, double scale)
Constructs an OrientedShape3D node with the specified geometry component, appearance component, mode, and rotation point.

OrientedShape3D(Geometry geometry, Appearance appearance, int mode, Vector3f axis)
Constructs an OrientedShape3D node with the specified geometry component, appearance component, mode, and axis.

OrientedShape3D(Geometry geometry, Appearance appearance, int mode, Vector3f axis, boolean constantScaleEnable, double scale)
Constructs an OrientedShape3D node with the specified geometry component, appearance component, mode, axis, constant scale enable flag, and scale The specified axis must not be parallel to the Z axis--(0,0,z) for any value of z.

Method Summary

Node	cloneNode(boolean forceDuplicate) Used to create a new instance of the node.
void	duplicateNode(Node originalNode, boolean forceDuplicate) Copies all node information from originalNode into the current node.
void	getAlignmentAxis(Vector3f axis) Retrieves the alignment axis of this OrientedShape3D node, and copies it into the specified vector.
int	getAlignmentMode() Retrieves the alignment mode.
boolean	getConstantScaleEnable() Retrieves the constant scale enable flag.
void	getRotationPoint(Point3f point) Retrieves the rotation point of this OrientedShape3D node, and copies it into the specified vector.
double	getScale() Retrieves the scale value for this OrientedShape3D.
void	setAlignmentAxis(float x, float y, float z) Sets the new alignment axis.
void	setAlignmentAxis(Vector3f axis) Sets the new alignment axis.
void	setAlignmentMode(int mode) Sets the alignment mode.
void	setConstantScaleEnable(boolean constantScaleEnable) Sets the constant scale enable flag.
void	setRotationPoint(float x, float y, float z) Sets the new rotation point.
void	setRotationPoint(Point3f point) Sets the new rotation point.
void	setScale(double scale) Sets the scale for this OrientedShape3D.

Methods inherited from class javax.media.j3d.Shape3D

addGeometry, getAllGeometries, getAppearance, getAppearanceOverrideEnable, getBounds, getCollisionBounds, getGeometry, getGeometry, indexOfGeometry, insertGeometry, intersect, intersect, intersect, numGeometries, removeAllGeometries, removeGeometry, removeGeometry, setAppearance, setAppearanceOverrideEnable, setCollisionBounds, setGeometry, setGeometry

Methods inherited from class javax.media.j3d.Node

cloneTree, cloneTree, cloneTree, cloneTree, cloneTree, cloneTree, getBoundsAutoCompute, getCollidable, getLocalToVworld, getLocalToVworld, getParent, getPickable, setBounds, setBoundsAutoCompute, setCollidable, setPickable

Methods inherited from class javax.media.j3d.SceneGraphObject

clearCapability, clearCapabilityIsFrequent, duplicateSceneGraphObject, getCapability, getCapabilityIsFrequent, getUserData, isCompiled, isLive, setCapability, setCapabilityIsFrequent, setUserData, updateNodeReferences

Methods inherited from class java.lang.Object

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

Field Detail

ROTATE_ABOUT_AXIS

public static final int ROTATE_ABOUT_AXIS

Specifies that rotation should be about the specified axis.

See Also:

setAlignmentMode(int), Constant Field Values

ROTATE_ABOUT_POINT

public static final int ROTATE_ABOUT_POINT

Specifies that rotation should be about the specified point and that the children's Y-axis should match the view object's Y-axis.

See Also:

setAlignmentMode(int), Constant Field Values

ROTATE_NONE

public static final int ROTATE_NONE

Specifies that no rotation is done. The OrientedShape3D will not be aligned to the view.

Since:

Java 3D 1.3

See Also:

setAlignmentMode(int), Constant Field Values

ALLOW_MODE_READ

public static final int ALLOW_MODE_READ

Specifies that this OrientedShape3D node allows reading its alignment mode information.

See Also:

Constant Field Values

ALLOW_MODE_WRITE

public static final int ALLOW_MODE_WRITE

Specifies that this OrientedShape3D node allows writing its alignment mode information.

See Also:

Constant Field Values

ALLOW_AXIS_READ

public static final int ALLOW_AXIS_READ

Specifies that this OrientedShape3D node allows reading its alignment axis information.

See Also:

Constant Field Values

ALLOW_AXIS_WRITE

public static final int ALLOW_AXIS_WRITE

Specifies that this OrientedShape3D node allows writing its alignment axis information.

See Also:

Constant Field Values

ALLOW_POINT_READ

public static final int ALLOW_POINT_READ

Specifies that this OrientedShape3D node allows reading its rotation point information.

See Also:

Constant Field Values

ALLOW_POINT_WRITE

public static final int ALLOW_POINT_WRITE

Specifies that this OrientedShape3D node allows writing its rotation point information.

See Also:

Constant Field Values

ALLOW_SCALE_READ

public static final int ALLOW_SCALE_READ

Specifies that this OrientedShape3D node allows reading its scale and constant scale enable information.

Since:

Java 3D 1.3

See Also:

Constant Field Values

ALLOW_SCALE_WRITE

public static final int ALLOW_SCALE_WRITE

Specifies that this OrientedShape3D node allows writing its scale and constant scale enable information.

Since:

Java 3D 1.3

See Also:

Constant Field Values

Constructor Detail

OrientedShape3D

public OrientedShape3D()

Constructs an OrientedShape3D node with default parameters. The default values are as follows:

alignment mode : ROTATE_ABOUT_AXIS
alignment axis : Y-axis (0,1,0)
rotation point : (0,0,1)
constant scale enable : false
scale : 1.0

OrientedShape3D

public OrientedShape3D(Geometry geometry,
                       Appearance appearance,
                       int mode,
                       Vector3f axis)

Constructs an OrientedShape3D node with the specified geometry component, appearance component, mode, and axis. The specified axis must not be parallel to the Z axis--(0,0,z) for any value of z. It is not possible for the +Z axis to point at the viewer's eye position by rotating about itself. The target transform will be set to the identity if the axis is (0,0,z).

Parameters:

geometry - the geometry component with which to initialize this shape node

appearance - the appearance component of the shape node

mode - alignment mode, one of: ROTATE_ABOUT_AXIS, ROTATE_ABOUT_POINT, or ROTATE_NONE

axis - the ray about which the OrientedShape3D rotates

OrientedShape3D

public OrientedShape3D(Geometry geometry,
                       Appearance appearance,
                       int mode,
                       Point3f point)

Constructs an OrientedShape3D node with the specified geometry component, appearance component, mode, and rotation point.

Parameters:

geometry - the geometry component with which to initialize this shape node

appearance - the appearance component of the shape node

mode - alignment mode, one of: ROTATE_ABOUT_AXIS, ROTATE_ABOUT_POINT, or ROTATE_NONE

point - the position about which the OrientedShape3D rotates

OrientedShape3D

public OrientedShape3D(Geometry geometry,
                       Appearance appearance,
                       int mode,
                       Vector3f axis,
                       boolean constantScaleEnable,
                       double scale)

Constructs an OrientedShape3D node with the specified geometry component, appearance component, mode, axis, constant scale enable flag, and scale The specified axis must not be parallel to the Z axis--(0,0,z) for any value of z. It is not possible for the +Z axis to point at the viewer's eye position by rotating about itself. The target transform will be set to the identity if the axis is (0,0,z).

Parameters:

geometry - the geometry component with which to initialize this shape node

appearance - the appearance component of the shape node

mode - alignment mode, one of: ROTATE_ABOUT_AXIS, ROTATE_ABOUT_POINT, or ROTATE_NONE

axis - the ray about which the OrientedShape3D rotates

constantScaleEnable - a flag indicating whether to enable constant scale

scale - scale value used when constant scale is enabled

Since:

Java 3D 1.3

OrientedShape3D

public OrientedShape3D(Geometry geometry,
                       Appearance appearance,
                       int mode,
                       Point3f point,
                       boolean constantScaleEnable,
                       double scale)

Constructs an OrientedShape3D node with the specified geometry component, appearance component, mode, and rotation point.

Parameters:

geometry - the geometry component with which to initialize this shape node

appearance - the appearance component of the shape node

mode - alignment mode, one of: ROTATE_ABOUT_AXIS, ROTATE_ABOUT_POINT, or ROTATE_NONE

point - the position about which the OrientedShape3D rotates

constantScaleEnable - a flag indicating whether to enable constant scale

scale - scale value used when constant scale is enabled

Since:

Java 3D 1.3

Method Detail

setAlignmentMode

public void setAlignmentMode(int mode)

Sets the alignment mode.

Parameters:

mode - alignment mode, one of: ROTATE_ABOUT_AXIS, ROTATE_ABOUT_POINT, or ROTATE_NONE

Throws:

CapabilityNotSetException - if appropriate capability is not set and this object is part of live or compiled scene graph

getAlignmentMode

public int getAlignmentMode()

Retrieves the alignment mode.

Returns:

one of: ROTATE_ABOUT_AXIS, ROTATE_ABOUT_POINT, or ROTATE_NONE

Throws:

CapabilityNotSetException - if appropriate capability is not set and this object is part of live or compiled scene graph

setAlignmentAxis

public void setAlignmentAxis(Vector3f axis)

Sets the new alignment axis. This is the ray about which this OrientedShape3D rotates when the mode is ROTATE_ABOUT_AXIS. The specified axis must not be parallel to the Z axis--(0,0,z) for any value of z. It is not possible for the +Z axis to point at the viewer's eye position by rotating about itself. The target transform will be set to the identity if the axis is (0,0,z).

Parameters:

axis - the new alignment axis

Throws:

CapabilityNotSetException - if appropriate capability is not set and this object is part of live or compiled scene graph

setAlignmentAxis

public void setAlignmentAxis(float x,
                             float y,
                             float z)

Sets the new alignment axis. This is the ray about which this OrientedShape3D rotates when the mode is ROTATE_ABOUT_AXIS. The specified axis must not be parallel to the Z axis--(0,0,z) for any value of z. It is not possible for the +Z axis to point at the viewer's eye position by rotating about itself. The target transform will be set to the identity if the axis is (0,0,z).

Parameters:

x - the x component of the alignment axis

y - the y component of the alignment axis

z - the z component of the alignment axis

Throws:

CapabilityNotSetException - if appropriate capability is not set and this object is part of live or compiled scene graph

getAlignmentAxis

public void getAlignmentAxis(Vector3f axis)

Retrieves the alignment axis of this OrientedShape3D node, and copies it into the specified vector.

Parameters:

axis - the vector that will contain the alignment axis

Throws:

CapabilityNotSetException - if appropriate capability is not set and this object is part of live or compiled scene graph

setRotationPoint

public void setRotationPoint(Point3f point)

Sets the new rotation point. This is the point about which the OrientedShape3D rotates when the mode is ROTATE_ABOUT_POINT.

Parameters:

point - the new rotation point

Throws:

CapabilityNotSetException - if appropriate capability is not set and this object is part of live or compiled scene graph

setRotationPoint

public void setRotationPoint(float x,
                             float y,
                             float z)

Sets the new rotation point. This is the point about which the OrientedShape3D rotates when the mode is ROTATE_ABOUT_POINT.

Parameters:

x - the x component of the rotation point

y - the y component of the rotation point

z - the z component of the rotation point

Throws:

CapabilityNotSetException - if appropriate capability is not set and this object is part of live or compiled scene graph

getRotationPoint

public void getRotationPoint(Point3f point)

Retrieves the rotation point of this OrientedShape3D node, and copies it into the specified vector.

Throws:

CapabilityNotSetException - if appropriate capability is not set and this object is part of live or compiled scene graph

setConstantScaleEnable

public void setConstantScaleEnable(boolean constantScaleEnable)

Sets the constant scale enable flag.

Parameters:

constantScaleEnable - a flag indicating whether to enable constant scale

Throws:

CapabilityNotSetException - if appropriate capability is not set and this object is part of live or compiled scene graph

Since:

Java 3D 1.3

getConstantScaleEnable

public boolean getConstantScaleEnable()

Retrieves the constant scale enable flag.

Returns:

the current constant scale enable flag

Throws:

CapabilityNotSetException - if appropriate capability is not set and this object is part of live or compiled scene graph

Since:

Java 3D 1.3

setScale

public void setScale(double scale)

Sets the scale for this OrientedShape3D. This scale is used when the constant scale enable flag is set to true.

Parameters:

scale - the scale value

Throws:

CapabilityNotSetException - if appropriate capability is not set and this object is part of live or compiled scene graph

Since:

Java 3D 1.3

getScale

public double getScale()

Retrieves the scale value for this OrientedShape3D.

Returns:

the current scale value

Throws:

CapabilityNotSetException - if appropriate capability is not set and this object is part of live or compiled scene graph

Since:

Java 3D 1.3

cloneNode

public Node cloneNode(boolean forceDuplicate)

Used to create a new instance of the node. This routine is called by cloneTree to duplicate the current node. cloneNode should be overridden by any user subclassed objects. All subclasses must have their cloneNode method consist of the following lines:

     public Node cloneNode(boolean forceDuplicate) {
         UserSubClass usc = new UserSubClass();
         usc.duplicateNode(this, forceDuplicate);
         return usc;
     }
 

Overrides:

cloneNode in class Shape3D

Parameters:

forceDuplicate - when set to true, causes the duplicateOnCloneTree flag to be ignored. When false, the value of each node's duplicateOnCloneTree variable determines whether NodeComponent data is duplicated or copied.

See Also:

Node.cloneTree(), Node.duplicateNode(javax.media.j3d.Node, boolean), NodeComponent.setDuplicateOnCloneTree(boolean)

duplicateNode

public void duplicateNode(Node originalNode,
                          boolean forceDuplicate)

Copies all node information from originalNode into the current node. This method is called from the cloneNode method which is, in turn, called by the cloneTree method.

For any NodeComponent objects contained by the object being duplicated, each NodeComponent object's duplicateOnCloneTree value is used to determine whether the NodeComponent should be duplicated in the new node or if just a reference to the current node should be placed in the new node. This flag can be overridden by setting the forceDuplicate parameter in the cloneTree method to true.
NOTE: Applications should not call this method directly. It should only be called by the cloneNode method.

Overrides:

duplicateNode in class Shape3D

Parameters:

originalNode - the original node to duplicate.

forceDuplicate - when set to true, causes the duplicateOnCloneTree flag to be ignored. When false, the value of each node's duplicateOnCloneTree variable determines whether NodeComponent data is duplicated or copied.

Throws:

java.lang.ClassCastException - if originalNode is not an instance of Shape3D

See Also:

Node.cloneTree(), Node.cloneNode(boolean), NodeComponent.setDuplicateOnCloneTree(boolean)