java.lang.Object
com.github.weisj.jsvg.geometry.util.ReversePathIterator
- All Implemented Interfaces:
PathIterator
A path iterator which iterates over a path in the reverse direction.
This is missing in the java.awt.geom package, although it's quite simple to implement.
After initialization the original PathIterator is not used any longer.
- Version:
- $Revision: 1.3 $
-
Field Summary
FieldsModifier and TypeFieldDescriptionprivate final double[]
The reversed coordinates.private int
The index into the coordinates during iteration.private int
The index into the segment types during iteration.private final int[]
The reversed segment types.private final int
The winding rule.Fields inherited from interface java.awt.geom.PathIterator
SEG_CLOSE, SEG_CUBICTO, SEG_LINETO, SEG_MOVETO, SEG_QUADTO, WIND_EVEN_ODD, WIND_NON_ZERO
-
Constructor Summary
ConstructorsConstructorDescriptionReversePathIterator
(PathIterator original) Create an inverted path iterator from a standard one, keeping the winding rule.ReversePathIterator
(PathIterator original, int windingRule) Create an inverted path iterator from a standard one. -
Method Summary
Modifier and TypeMethodDescriptionprivate static int
coordinatesForSegmentType
(int segtype) Get the number of coordinates needed for a segment type.int
currentSegment
(double[] coords) Returns the coordinates and type of the current path segment in the iteration.int
currentSegment
(float[] coords) Returns the coordinates and type of the current path segment in the iteration.int
Returns the winding rule for determining the interior of the path.boolean
isDone()
Tests if the iteration is complete.void
next()
Moves the iterator to the next segment of the path forwards along the primary direction of traversal as long as there are more points in that direction.
-
Field Details
-
windingRule
private final int windingRuleThe winding rule. -
coordinates
private final double[] coordinatesThe reversed coordinates. -
segmentTypes
private final int[] segmentTypesThe reversed segment types. -
coordIndex
private int coordIndexThe index into the coordinates during iteration. -
segmentIndex
private int segmentIndexThe index into the segment types during iteration.
-
-
Constructor Details
-
ReversePathIterator
Create an inverted path iterator from a standard one, keeping the winding rule.- Parameters:
original
- original iterator
-
ReversePathIterator
Create an inverted path iterator from a standard one.- Parameters:
original
- original iteratorwindingRule
- winding rule of newly created iterator
-
-
Method Details
-
getWindingRule
public int getWindingRule()Returns the winding rule for determining the interior of the path.- Specified by:
getWindingRule
in interfacePathIterator
- Returns:
- the winding rule.
- See Also:
-
coordinatesForSegmentType
private static int coordinatesForSegmentType(int segtype) Get the number of coordinates needed for a segment type.- Parameters:
segtype
- segment type- Returns:
- coordinates needed
-
next
public void next()Moves the iterator to the next segment of the path forwards along the primary direction of traversal as long as there are more points in that direction.- Specified by:
next
in interfacePathIterator
-
isDone
public boolean isDone()Tests if the iteration is complete.- Specified by:
isDone
in interfacePathIterator
- Returns:
true
if all the segments have been read;false
otherwise.
-
currentSegment
public int currentSegment(double[] coords) Returns the coordinates and type of the current path segment in the iteration. The return value is the path-segment type: SEG_MOVETO, SEG_LINETO, SEG_QUADTO, SEG_CUBICTO, or SEG_CLOSE. A double array of length 6 must be passed in and can be used to store the coordinates of the point(s). Each point is stored as a pair of double x,y coordinates. SEG_MOVETO and SEG_LINETO types returns one point, SEG_QUADTO returns two points, SEG_CUBICTO returns 3 points and SEG_CLOSE does not return any points.- Specified by:
currentSegment
in interfacePathIterator
- Parameters:
coords
- an array that holds the data returned from this method- Returns:
- the path-segment type of the current path segment.
- See Also:
-
currentSegment
public int currentSegment(float[] coords) Returns the coordinates and type of the current path segment in the iteration. The return value is the path-segment type: SEG_MOVETO, SEG_LINETO, SEG_QUADTO, SEG_CUBICTO, or SEG_CLOSE. A float array of length 6 must be passed in and can be used to store the coordinates of the point(s). Each point is stored as a pair of float x,y coordinates. SEG_MOVETO and SEG_LINETO types returns one point, SEG_QUADTO returns two points, SEG_CUBICTO returns 3 points and SEG_CLOSE does not return any points.- Specified by:
currentSegment
in interfacePathIterator
- Parameters:
coords
- an array that holds the data returned from this method- Returns:
- the path-segment type of the current path segment.
- See Also:
-