cz.cuni.jagrlib.iface
Interface StrokeCallback

All Superinterfaces:

java.io.Serializable

public interface StrokeCallback
extends java.io.Serializable

Interface for stroke call-back routines.

Since:

0.02

See Also:

StrokeCallback.java

Field Summary

static int	MASK_ALPHA Use alpha-channel modulation.
static int	MASK_BIT Use bit-mask modulation.
static int	MASK_COLOR Use color modulation.
static int	MASK_PARAMETRIC Use parametric (relative) coordinates.
static int	MASK_WIDTH Use line width modulation.

Method Summary

double	getAlpha(double t, boolean cyclic) Returns alpha-channel information about the given point on the stroke.
double	getAlpha(int i, int length, boolean cyclic) Returns alpha-channel information about the given point on the stroke.
boolean	getBit(double t, boolean cyclic) Returns boolean information about the given point on the stroke.
boolean	getBit(int i, int length, boolean cyclic) Returns boolean information about the given point on the stroke.
void	getColor(double[] color, double t, boolean cyclic) Returns color information (RGB) about the given point on the stroke.
void	getColor(double[] color, int i, int length, boolean cyclic) Returns color information (RGB) about the given point on the stroke.
int	getFeatures() Tells which features are used by this stroke-modulation function.
double	getWidth(double t, boolean cyclic) Returns width of the given point on the stroke.
double	getWidth(int i, int length, boolean cyclic) Returns width of the given point on the stroke.

Field Detail

MASK_BIT

static final int MASK_BIT

Use bit-mask modulation.

See Also:

Constant Field Values

MASK_ALPHA

static final int MASK_ALPHA

Use alpha-channel modulation.

See Also:

Constant Field Values

MASK_COLOR

static final int MASK_COLOR

Use color modulation.

See Also:

Constant Field Values

MASK_WIDTH

static final int MASK_WIDTH

Use line width modulation.

See Also:

Constant Field Values

MASK_PARAMETRIC

static final int MASK_PARAMETRIC

Use parametric (relative) coordinates.

See Also:

Constant Field Values

Method Detail

getFeatures

int getFeatures()

Tells which features are used by this stroke-modulation function.

Returns:

Flags using MASK_* constants.

getBit

boolean getBit(int i,
               int length,
               boolean cyclic)

Returns boolean information about the given point on the stroke.

Parameters:

i - Point's index (from 0 to length-1).

length - Total stroke length.

cyclic - Is that stroke cyclic?.

Returns:

true for the point that has to be drawn.

getBit

boolean getBit(double t,
               boolean cyclic)

Returns boolean information about the given point on the stroke.

Parameters:

t - Point's relative coordinate (from 0.0 to 1.0).

cyclic - Is that stroke cyclic?.

Returns:

true for the point that has to be drawn.

getAlpha

double getAlpha(int i,
                int length,
                boolean cyclic)

Returns alpha-channel information about the given point on the stroke.

Parameters:

i - Point's index (from 0 to length-1).

length - Total stroke length.

cyclic - Is that stroke cyclic?.

Returns:

Alpha (opacity) to draw the point with (from 0.0 to 1.0).

getAlpha

double getAlpha(double t,
                boolean cyclic)

Returns alpha-channel information about the given point on the stroke.

Parameters:

t - Point's relative coordinate (from 0.0 to 1.0).

cyclic - Is that stroke cyclic?.

Returns:

Alpha (opacity) to draw the point with (from 0.0 to 1.0).

getColor

void getColor(double[] color,
              int i,
              int length,
              boolean cyclic)

Returns color information (RGB) about the given point on the stroke.

Parameters:

color - RGB color of the point.

i - Point's index (from 0 to length-1).

length - Total stroke length.

cyclic - Is that stroke cyclic?.

getColor

void getColor(double[] color,
              double t,
              boolean cyclic)

Returns color information (RGB) about the given point on the stroke.

Parameters:

color - RGB color of the point.

t - Point's relative coordinate (from 0.0 to 1.0).

cyclic - Is that stroke cyclic?.

getWidth

double getWidth(int i,
                int length,
                boolean cyclic)

Returns width of the given point on the stroke.

Parameters:

i - Point's index (from 0 to length-1).

length - Total stroke length.

cyclic - Is that stroke cyclic?.

Returns:

Width of the point.

getWidth

double getWidth(double t,
                boolean cyclic)

Returns width of the given point on the stroke.

Parameters:

t - Point's relative coordinate (from 0.0 to 1.0).

cyclic - Is that stroke cyclic?.

Returns:

Width of the point.