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com.port80.graph.dot.impl
Class DotSpline
java.lang.Objectcom.port80.graph.dot.impl.DotSpline
- public class DotSpline
- extends java.lang.Object
Spline class represent a spline of n-Bezier segments with 3n+1 points. //TODO: Should use int[] x,y instead IntPoint.
| Field Summary | |
private static boolean |
DEBUG
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(package private) DotPoint |
ep
Tail end point (ie. |
(package private) boolean |
isReversed
Head end point (ie. |
private static java.lang.String |
NAME
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(package private) DotPoint[] |
pts
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(package private) int |
size
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(package private) DotPoint |
sp
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private static boolean |
VERBOSE
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private double[][] |
xs
Temp. |
private double[][] |
ys
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| Constructor Summary | |
DotSpline()
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DotSpline(DotSpline s)
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DotSpline(DotSpline s,
int start,
int end)
Create a new spline from the given segment. |
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DotSpline(int n)
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DotSpline(int n,
int size)
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| Method Summary | |
void |
add(DotPoint p)
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void |
add(DotPolyline segment)
Add a new Spline segment of n points to the spline. |
void |
add(double x,
double y)
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void |
bezierAt(int index,
double t,
DotPoint ret)
Evaluate Bezier point on segment start at 'index' at parameter value 't'. |
IntPoint |
bezierAtY(int y)
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DotPoint |
get(int n)
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java.awt.Rectangle |
getBounds()
Determine the bounding rectange for the curve from Control 'c' to this control. |
void |
grow(int n)
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boolean |
intersection(DotPoint ret,
java.awt.Shape shape,
int index)
Binary search in 't' domain for intersection of the spline segment starting from 'index' with shape. |
boolean |
isReversed()
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void |
reset()
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void |
resize(int newsize,
int offset)
Splice point array and keep only points from offset to offset+newsize. |
int |
size()
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void |
splitAt(double t,
int index,
DotSpline left,
DotSpline right,
DotPoint ret)
Split the Bezier curve, started at given index, at a particular parameter value. |
java.lang.String |
toGeneralPath()
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java.lang.String |
toString()
Convert this Object to a human-readable String. |
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
| Field Detail |
NAME
private static final java.lang.String NAME
- See Also:
- Constant Field Values
VERBOSE
private static final boolean VERBOSE
- See Also:
- Constant Field Values
DEBUG
private static final boolean DEBUG
- See Also:
- Constant Field Values
pts
DotPoint[] pts
size
int size
sp
DotPoint sp
ep
DotPoint ep
- Tail end point (ie. tail arrow head).
isReversed
boolean isReversed
- Head end point (ie. head arrow head).
xs
private double[][] xs
- Temp. variables for splitAt().
ys
private double[][] ys
| Constructor Detail |
DotSpline
public DotSpline()
DotSpline
public DotSpline(int n)
DotSpline
public DotSpline(int n,
int size)
DotSpline
public DotSpline(DotSpline s)
DotSpline
public DotSpline(DotSpline s, int start, int end)
- Create a new spline from the given segment.
| Method Detail |
resize
public void resize(int newsize,
int offset)
- Splice point array and keep only points from offset to offset+newsize.
reset
public void reset()
getBounds
public java.awt.Rectangle getBounds()
- Determine the bounding rectange for the curve from Control
'c' to this control. The bounding polygon is given by the
7 control points when dividing the curve into half
(t=0.5): P0(R0)->R1->R2->R3(S0)->S1->S2->S3(P3).
The bounding rectangle is the bounds of the bounding
polygon.
toString
public java.lang.String toString()
- Description copied from class:
java.lang.Object - Convert this Object to a human-readable String.
There are no limits placed on how long this String
should be or what it should contain. We suggest you
make it as intuitive as possible to be able to place
it into System.out.println() 55
and such.
It is typical, but not required, to ensure that this method never completes abruptly with a java.lang.RuntimeException.
This method will be called when performing string concatenation with this object. If the result is
null, string concatenation will instead use"null".The default implementation returns
getClass().getName() + "@" + Integer.toHexString(hashCode()).
toGeneralPath
public java.lang.String toGeneralPath()
add
public void add(DotPolyline segment)
- Add a new Spline segment of n points to the spline. The first
point of the segment should be same as the last point of the
current spline.
add
public void add(DotPoint p)
add
public void add(double x,
double y)
grow
public void grow(int n)
size
public int size()
get
public DotPoint get(int n)
isReversed
public boolean isReversed()
bezierAtY
public IntPoint bezierAtY(int y)
bezierAt
public void bezierAt(int index,
double t,
DotPoint ret)
- Evaluate Bezier point on segment start at 'index' at parameter value 't'.
intersection
public boolean intersection(DotPoint ret, java.awt.Shape shape, int index)
- Binary search in 't' domain for intersection of the spline
segment starting from 'index' with shape.
splitAt
public void splitAt(double t,
int index,
DotSpline left,
DotSpline right,
DotPoint ret)
- Split the Bezier curve, started at given index, at a particular parameter value. Fill
in control points for resulting sub-curves if 'left' and/or
'right' are not null.
(From Glassner's Graphics Gems).
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DETAIL: FIELD | CONSTR | METHOD | ||||||||