math.geom2d.polygon

Interface Polygon2D

All Superinterfaces:

CirculinearDomain2D, CirculinearShape2D, Domain2D, GeometricObject2D, Shape2D

All Known Implementing Classes:

HRectangle2D, MultiPolygon2D, Rectangle2D, SimplePolygon2D

public interface Polygon2D
extends CirculinearDomain2D

Represent any class made of a finite set of simply connected edges. This include simple polygons, multiple polygons, or more specialized shapes like rectangles, squares... The boundary of a polygon is a collection of LinearRing2D.

Field Summary

Fields inherited from interface math.geom2d.Shape2D

ACCURACY

Method Summary

Modifier and Type	Method and Description
void	addVertex(Point2D point) Adds a vertex as last vertex of this polygon.
double	area() Returns the signed area of the polygon.
CirculinearContourArray2D<? extends LinearRing2D>	boundary() Overrides the definition of boundary() such that the boundary of a polygon is defined as a set of LinearRing2D.
Point2D	centroid() Returns the centroid (center of mass) of the polygon.
Polygon2D	clip(Box2D box) Clip the shape with the given box, and returns a new shape.
int	closestVertexIndex(Point2D point) Returns the index of the closest vertex to the input point.
Polygon2D	complement() Returns the complementary polygon.
java.util.Collection<? extends LinearRing2D>	contours() Returns the set of contours that enclose this domain.
int	edgeNumber() Returns the number of edges of the polygon
java.util.Collection<? extends LineSegment2D>	edges() Return the edges as line segments of the polygon
void	insertVertex(int index, Point2D point) Inserts a vertex at the specified position.
void	removeVertex(int index) Removes the vertex at the given index.
void	setVertex(int i, Point2D point) Sets the position of the i-th vertex
Polygon2D	transform(AffineTransform2D trans) Returns the new Polygon created by an affine transform of this polygon.
Point2D	vertex(int i) Returns the i-th vertex of the polygon.
int	vertexNumber() Returns the number of vertices of the polygon
java.util.Collection<Point2D>	vertices() Returns the vertices (singular points) of the polygon

Methods inherited from interface math.geom2d.circulinear.CirculinearDomain2D

transform

Methods inherited from interface math.geom2d.circulinear.CirculinearShape2D

buffer

Methods inherited from interface math.geom2d.domain.Domain2D

asPolygon, draw, fill

Methods inherited from interface math.geom2d.Shape2D

boundingBox, contains, contains, distance, distance, isBounded, isEmpty

Methods inherited from interface math.geom2d.GeometricObject2D

almostEquals

Method Detail

vertices

java.util.Collection<Point2D> vertices()

Returns the vertices (singular points) of the polygon

vertex

Point2D vertex(int i)

Returns the i-th vertex of the polygon.

Parameters:

i - index of the vertex, between 0 and the number of vertices

setVertex

void setVertex(int i,
               Point2D point)

Sets the position of the i-th vertex

Parameters:

i - the vertex index

point - the new position of the vertex

Throws:

java.lang.UnsupportedOperationException - if this polygon implementation does not support vertex modification

addVertex

void addVertex(Point2D point)

Adds a vertex as last vertex of this polygon.

Parameters:

point - the position of the new vertex

Throws:

java.lang.UnsupportedOperationException - if this polygon implementation does not support vertex modification

insertVertex

void insertVertex(int index,
                  Point2D point)

Inserts a vertex at the specified position.

Parameters:

index - index at which the specified vertex is to be inserted

point - the position of the new vertex

Throws:

java.lang.UnsupportedOperationException - if this polygon implementation does not support vertex modification

removeVertex

void removeVertex(int index)

Removes the vertex at the given index.

Parameters:

index - index of the vertex to remove

Throws:

java.lang.UnsupportedOperationException - if this polygon implementation does not support vertex modification

vertexNumber

int vertexNumber()

Returns the number of vertices of the polygon

Since:

0.6.3

closestVertexIndex

int closestVertexIndex(Point2D point)

Returns the index of the closest vertex to the input point.

edges

java.util.Collection<? extends LineSegment2D> edges()

Return the edges as line segments of the polygon

edgeNumber

int edgeNumber()

Returns the number of edges of the polygon

centroid

Point2D centroid()

Returns the centroid (center of mass) of the polygon.

area

double area()

Returns the signed area of the polygon.

boundary

CirculinearContourArray2D<? extends LinearRing2D> boundary()

Overrides the definition of boundary() such that the boundary of a polygon is defined as a set of LinearRing2D.

Specified by:

boundary in interface CirculinearDomain2D

Specified by:

boundary in interface Domain2D

Returns:

the boundary of the domain

contours

java.util.Collection<? extends LinearRing2D> contours()

Description copied from interface: Domain2D

Returns the set of contours that enclose this domain. The result is a collection of shapes that implement the Contour2D interface.

Specified by:

contours in interface CirculinearDomain2D

Specified by:

contours in interface Domain2D

See Also:

Contour2D

complement

Polygon2D complement()

Returns the complementary polygon.

Specified by:

complement in interface CirculinearDomain2D

Specified by:

complement in interface Domain2D

Returns:

the polygon complementary to this

transform

Polygon2D transform(AffineTransform2D trans)

Returns the new Polygon created by an affine transform of this polygon.

Specified by:

transform in interface Domain2D

Specified by:

transform in interface Shape2D

Parameters:

trans - an affine transform

Returns:

the transformed shape

clip

Polygon2D clip(Box2D box)

Description copied from interface: Shape2D

Clip the shape with the given box, and returns a new shape. The box must be bounded.

Specified by:

clip in interface Domain2D

Specified by:

clip in interface Shape2D

Parameters:

box - the clipping box

Returns:

the clipped shape