javax.media.j3d
Class LineAttributes

java.lang.Object
  |
  +--javax.media.j3d.SceneGraphObject
        |
        +--javax.media.j3d.NodeComponent
              |
              +--javax.media.j3d.LineAttributes

public class LineAttributes

extends NodeComponent

The LineAttributes object defines all rendering state that can be set as a component object of a Shape3D node. The line attributes that can be defined are:

• Pattern - specifies the pattern used to draw the line:
  • PATTERN_SOLID - draws a solid line with no pattern. This is the default.
  • PATTERN_DASH - draws dashed lines. Ideally, these will be drawn with a repeating pattern of 8 pixels on and 8 pixels off.
  • PATTERN_DOT - draws dotted lines. Ideally, these will be drawn with a repeating pattern of 1 pixel on and 7 pixels off.
  • PATTERN_DASH_DOT - draws dashed-dotted lines. Ideally, these will be drawn with a repeating pattern of 7 pixels on, 4 pixels off, 1 pixel on, and 4 pixels off.
  • PATTERN_USER_DEFINED - draws lines with a user-defined line pattern. See "User-defined Line Patterns," below.

• Antialiasing (enabled or disabled). By default, antialiasing is disabled.

If antialiasing is enabled, the lines are considered transparent for rendering purposes. They are rendered with all the other transparent objects and adhere to the other transparency settings such as the View transparency sorting policy and the View depth buffer freeze transparent enable.

• Width (in pixels). The default is a line width of one pixel.

User-defined Line Patterns

A user-defined line pattern is specified with a pattern mask and an optional scale factor.

The Pattern Mask

The pattern is specified using a 16-bit mask that specifies on and off segments. Bit 0 in the pattern mask corresponds to the first pixel of the line or line strip primitive. A value of 1 for a bit in the pattern mask indicates that the corresponding pixel is drawn, while a value of 0 indicates that the corresponding pixel is not drawn. After all 16 bits in the pattern are used, the pattern is repeated.

For example, a mask of 0x00ff defines a dashed line with a repeating pattern of 8 pixels on followed by 8 pixels off. A value of 0x0101 defines a a dotted line with a repeating pattern of 1 pixel on and 7 pixels off.

The pattern continues around individual line segments of a line strip primitive. It is restarted at the beginning of each new line strip. For line array primitives, the pattern is restarted at the beginning of each line.

The Scale Factor

The pattern is multiplied by the scale factor such that each bit in the pattern mask corresponds to that many consecutive pixels. For example, a scale factor of 3 applied to a pattern mask of 0x001f would produce a repeating pattern of 15 pixels on followed by 33 pixels off. The valid range for this attribute is [1,15]. Values outside this range are clamped.

See Also:

Appearance, View

Field Summary

static int	ALLOW_ANTIALIASING_READ Specifies that this LineAttributes object allows reading its line antialiasing flag.
static int	ALLOW_ANTIALIASING_WRITE Specifies that this LineAttributes object allows writing its line antialiasing flag.
static int	ALLOW_PATTERN_READ Specifies that this LineAttributes object allows reading its line pattern information.
static int	ALLOW_PATTERN_WRITE Specifies that this LineAttributes object allows writing its line pattern information.
static int	ALLOW_WIDTH_READ Specifies that this LineAttributes object allows reading its line width information.
static int	ALLOW_WIDTH_WRITE Specifies that this LineAttributes object allows writing its line width information.
static int	PATTERN_DASH Draw dashed lines.
static int	PATTERN_DASH_DOT Draw dashed-dotted lines.
static int	PATTERN_DOT Draw dotted lines.
static int	PATTERN_SOLID Draw solid lines with no pattern.
static int	PATTERN_USER_DEFINED Draw lines with a user-defined line pattern.

Constructor Summary

LineAttributes()
Constructs a LineAttributes object with default parameters.

LineAttributes(float lineWidth, int linePattern, boolean lineAntialiasing)
Constructs a LineAttributes object with specified values.

Method Summary

NodeComponent	cloneNodeComponent() Deprecated. replaced with cloneNodeComponent(boolean forceDuplicate)
boolean	getLineAntialiasingEnable() Retrieves the state of the line antialiasing flag.
int	getLinePattern() Gets the line pattern for this LineAttributes component object.
float	getLineWidth() Gets the line width for this LineAttributes component object.
int	getPatternMask() Retrieves the line pattern mask.
int	getPatternScaleFactor() Retrieves the line pattern scale factor.
void	setLineAntialiasingEnable(boolean state) Enables or disables line antialiasing for this LineAttributes component object.
void	setLinePattern(int linePattern) Sets the line pattern for this LineAttributes component object.
void	setLineWidth(float lineWidth) Sets the line width for this LineAttributes component object.
void	setPatternMask(int mask) Sets the line pattern mask to the specified value.
void	setPatternScaleFactor(int scaleFactor) Sets the line pattern scale factor to the specified value.

Methods inherited from class javax.media.j3d.NodeComponent

cloneNodeComponent, duplicateNodeComponent, duplicateNodeComponent, getDuplicateOnCloneTree, setDuplicateOnCloneTree

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

ALLOW_WIDTH_READ

public static final int ALLOW_WIDTH_READ

Specifies that this LineAttributes object allows reading its line width information.

See Also:

Constant Field Values

ALLOW_WIDTH_WRITE

public static final int ALLOW_WIDTH_WRITE

Specifies that this LineAttributes object allows writing its line width information.

See Also:

Constant Field Values

ALLOW_PATTERN_READ

public static final int ALLOW_PATTERN_READ

Specifies that this LineAttributes object allows reading its line pattern information.

See Also:

Constant Field Values

ALLOW_PATTERN_WRITE

public static final int ALLOW_PATTERN_WRITE

Specifies that this LineAttributes object allows writing its line pattern information.

See Also:

Constant Field Values

ALLOW_ANTIALIASING_READ

public static final int ALLOW_ANTIALIASING_READ

Specifies that this LineAttributes object allows reading its line antialiasing flag.

See Also:

Constant Field Values

ALLOW_ANTIALIASING_WRITE

public static final int ALLOW_ANTIALIASING_WRITE

Specifies that this LineAttributes object allows writing its line antialiasing flag.

See Also:

Constant Field Values

PATTERN_SOLID

public static final int PATTERN_SOLID

Draw solid lines with no pattern.

See Also:

setLinePattern(int), Constant Field Values

PATTERN_DASH

public static final int PATTERN_DASH

Draw dashed lines. Ideally, these will be drawn with a repeating pattern of 8 pixels on and 8 pixels off.

See Also:

setLinePattern(int), Constant Field Values

PATTERN_DOT

public static final int PATTERN_DOT

Draw dotted lines. Ideally, these will be drawn with a repeating pattern of 1 pixel on and 7 pixels off.

See Also:

setLinePattern(int), Constant Field Values

PATTERN_DASH_DOT

public static final int PATTERN_DASH_DOT

Draw dashed-dotted lines. Ideally, these will be drawn with a repeating pattern of 7 pixels on, 4 pixels off, 1 pixel on, and 4 pixels off.

See Also:

setLinePattern(int), Constant Field Values

PATTERN_USER_DEFINED

public static final int PATTERN_USER_DEFINED

Draw lines with a user-defined line pattern. The line pattern is specified with a pattern mask and scale factor.

Since:

Java 3D 1.2

See Also:

setLinePattern(int), setPatternMask(int), setPatternScaleFactor(int), Constant Field Values

Constructor Detail

LineAttributes

public LineAttributes()

Constructs a LineAttributes object with default parameters. The default values are as follows:

line width : 1
line pattern : PATTERN_SOLID
pattern mask : 0xffff
pattern scale factor : 1
line antialiasing : false

LineAttributes

public LineAttributes(float lineWidth,
                      int linePattern,
                      boolean lineAntialiasing)

Constructs a LineAttributes object with specified values.

Parameters:

lineWidth - the width of lines in pixels

linePattern - the line pattern, one of PATTERN_SOLID, PATTERN_DASH, PATTERN_DOT, or PATTERN_DASH_DOT

lineAntialiasing - flag to set line antialising ON or OFF

Method Detail

setLineWidth

public void setLineWidth(float lineWidth)

Sets the line width for this LineAttributes component object.

Parameters:

lineWidth - the width, in pixels, of line primitives

Throws:

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

getLineWidth

public float getLineWidth()

Gets the line width for this LineAttributes component object.

Returns:

the width, in pixels, of line primitives

Throws:

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

setLinePattern

public void setLinePattern(int linePattern)

Sets the line pattern for this LineAttributes component object.

Parameters:

linePattern - the line pattern to be used, one of: PATTERN_SOLID, PATTERN_DASH, PATTERN_DOT, PATTERN_DASH_DOT, or PATTERN_USER_DEFINED.

Throws:

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

getLinePattern

public int getLinePattern()

Gets the line pattern for this LineAttributes component object.

Returns:

the line pattern

Throws:

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

setPatternMask

public void setPatternMask(int mask)

Sets the line pattern mask to the specified value. This is used when the linePattern attribute is set to PATTERN_USER_DEFINED. In this mode, the pattern is specified using a 16-bit mask that specifies on and off segments. Bit 0 in the pattern mask corresponds to the first pixel of the line or line strip primitive. A value of 1 for a bit in the pattern mask indicates that the corresponding pixel is drawn, while a value of 0 indicates that the corresponding pixel is not drawn. After all 16 bits in the pattern are used, the pattern is repeated. For example, a mask of 0x00ff defines a dashed line with a repeating pattern of 8 pixels on followed by 8 pixels off. A value of 0x0101 defines a a dotted line with a repeating pattern of 1 pixel on and 7 pixels off

The pattern continues around individual line segments of a line strip primitive. It is restarted at the beginning of each new line strip. For line array primitives, the pattern is restarted at the beginning of each line.

Parameters:

mask - the new line pattern mask

Throws:

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

Since:

Java 3D 1.2

See Also:

setPatternScaleFactor(int)

getPatternMask

public int getPatternMask()

Retrieves the line pattern mask.

Returns:

the line pattern mask

Throws:

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

Since:

Java 3D 1.2

setPatternScaleFactor

public void setPatternScaleFactor(int scaleFactor)

Sets the line pattern scale factor to the specified value. This is used in conjunction with the patternMask when the linePattern attribute is set to PATTERN_USER_DEFINED. The pattern is multiplied by the scale factor such that each bit in the pattern mask corresponds to that many consecutive pixels. For example, a scale factor of 3 applied to a pattern mask of 0x001f would produce a repeating pattern of 15 pixels on followed by 33 pixels off. The valid range for this attribute is [1,15]. Values outside this range are clamped.

Parameters:

scaleFactor - the new line pattern scale factor

Throws:

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

Since:

Java 3D 1.2

See Also:

setPatternMask(int)

getPatternScaleFactor

public int getPatternScaleFactor()

Retrieves the line pattern scale factor.

Returns:

the line pattern scale factor

Throws:

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

Since:

Java 3D 1.2

setLineAntialiasingEnable

public void setLineAntialiasingEnable(boolean state)

Enables or disables line antialiasing for this LineAttributes component object.

If antialiasing is enabled, the lines are considered transparent for rendering purposes. They are rendered with all the other transparent objects and adhere to the other transparency settings such as the View transparency sorting policy and the View depth buffer freeze transparent enable.

Parameters:

state - true or false to enable or disable line antialiasing

Throws:

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

See Also:

View

getLineAntialiasingEnable

public boolean getLineAntialiasingEnable()

Retrieves the state of the line antialiasing flag.

Returns:

true if line antialiasing is enabled, false if line antialiasing is disabled

Throws:

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

cloneNodeComponent

public NodeComponent cloneNodeComponent()

Deprecated. replaced with cloneNodeComponent(boolean forceDuplicate)

Overrides:

cloneNodeComponent in class NodeComponent