org.jplot2d.util

Class LineHatchPaint

java.lang.Object

org.jplot2d.util.LineHatchPaint

All Implemented Interfaces:

java.awt.Paint, java.awt.Transparency

public class LineHatchPaint
extends java.lang.Object
implements java.awt.Paint

The LineHatchPaint class provides a way to fill a Shape with line hatch pattern. Because Java require instances of classes implementing Paint must be read-only, this class is more like a factory to create paint instance for renderer threads.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	LineHatchPaint.PointComparatorNX descend X
static class	LineHatchPaint.PointComparatorNY descend Y
static class	LineHatchPaint.PointComparatorX ascend X
static class	LineHatchPaint.PointComparatorY ascend Y

Field Summary

Fields inherited from interface java.awt.Transparency

BITMASK, OPAQUE, TRANSLUCENT

Constructor Summary

Constructors

Constructor and Description
LineHatchPaint(java.awt.Color color, java.awt.BasicStroke stroke, double angle, double spacing) Construct a LineHatchPaint with given arguments.
LineHatchPaint(double angle) Construct a LineHatchPaint with the given angle.
LineHatchPaint(float width, double angle, double spacing) Construct a LineHatchPaint with the given angle.

Method Summary

Modifier and Type	Method and Description
static boolean	approxBetween(double a, double b, double v)
static java.awt.geom.Line2D[]	calcHatchLinesClipped(LineHatchPaint lhp, java.awt.geom.Rectangle2D clip, double scale)
java.awt.Shape[]	calcHatchShapes(java.awt.Shape shape, java.awt.geom.Rectangle2D clip, double scale) Calculate hatch shapes to fill the given shape.
java.awt.PaintContext	createContext(java.awt.image.ColorModel cm, java.awt.Rectangle deviceBounds, java.awt.geom.Rectangle2D userBounds, java.awt.geom.AffineTransform xform, java.awt.RenderingHints hints)
double	getAngle()
java.awt.Color	getColor()
double	getSpacing()
java.awt.BasicStroke	getStroke()
int	getTransparency()
static boolean	intersectLines(java.awt.geom.Line2D line, double x3, double y3, double x4, double y4, double[] point) The method checks up if line and line (x3, y3) - (x4, y4) intersect.

Methods inherited from class java.lang.Object

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

Constructor Detail

LineHatchPaint

public LineHatchPaint(double angle)

Construct a LineHatchPaint with the given angle. The default values:

• color: BLACK
• line width: 0.0
• line style: solid
• line spacing: 6pt

Parameters:

angle - the counterclockwise angle in degrees from horizontal

LineHatchPaint

public LineHatchPaint(float width,
                      double angle,
                      double spacing)

Construct a LineHatchPaint with the given angle. The default values:

• color: BLACK
• line style: solid

Parameters:

width - the line width

angle - the counterclockwise angle in degrees from horizontal

spacing - the spacing, in point(1/72 inch), between the parallel lines

LineHatchPaint

public LineHatchPaint(java.awt.Color color,
                      java.awt.BasicStroke stroke,
                      double angle,
                      double spacing)

Construct a LineHatchPaint with given arguments.

Parameters:

width - the line width

dash - the dash array. null means solid line

angle - the counterclockwise angle in degrees from horizontal

spacing - the spacing, in point(1/72 inch), between the parallel lines

Method Detail

getColor

public java.awt.Color getColor()

getStroke

public java.awt.BasicStroke getStroke()

getAngle

public double getAngle()

getSpacing

public double getSpacing()

createContext

public java.awt.PaintContext createContext(java.awt.image.ColorModel cm,
                                           java.awt.Rectangle deviceBounds,
                                           java.awt.geom.Rectangle2D userBounds,
                                           java.awt.geom.AffineTransform xform,
                                           java.awt.RenderingHints hints)

Specified by:

createContext in interface java.awt.Paint

getTransparency

public int getTransparency()

Specified by:

getTransparency in interface java.awt.Transparency

calcHatchShapes

public java.awt.Shape[] calcHatchShapes(java.awt.Shape shape,
                                        java.awt.geom.Rectangle2D clip,
                                        double scale)

Calculate hatch shapes to fill the given shape.

Parameters:

shape - the shape to hatch

clip - the clip

scale -

Returns:

hatch shapes

calcHatchLinesClipped

public static java.awt.geom.Line2D[] calcHatchLinesClipped(LineHatchPaint lhp,
                                                           java.awt.geom.Rectangle2D clip,
                                                           double scale)

intersectLines

public static boolean intersectLines(java.awt.geom.Line2D line,
                                     double x3,
                                     double y3,
                                     double x4,
                                     double y4,
                                     double[] point)

The method checks up if line and line (x3, y3) - (x4, y4) intersect. If lines intersect then the result parameters are saved to point array. The size of array point must be at least 2. Note the algorithm is not symmetric. The given line is the primary line.

Parameters:

line - the primary line

x3 -

y3 -

x4 -

y4 -

point -

Returns:

true if two lines intersect

approxBetween

public static boolean approxBetween(double a,
                                    double b,
                                    double v)