org.newdawn.slick.geom
Class Polygon

java.lang.Object
  org.newdawn.slick.geom.Shape
      org.newdawn.slick.geom.Polygon

All Implemented Interfaces:

java.io.Serializable

public class Polygon
extends Shape

A polygon implementation meeting the Shape contract.

Author:

Mark

See Also:

Serialized Form

Field Summary

Fields inherited from class org.newdawn.slick.geom.Shape

boundingCircleRadius, center, maxX, maxY, minX, minY, points, pointsDirty, trianglesDirty, tris, x, y

Constructor Summary

Polygon()
Create an empty polygon

Polygon(float[] points)
Construct a new polygon with 3 or more points.

Method Summary

void	addPoint(float x, float y) Add a point to the polygon
boolean	closed() True if this is a closed shape
Polygon	copy() Provide a copy of this polygon
protected void	createPoints() Subclasses implement this to create the points of the shape.
void	setAllowDuplicatePoints(boolean allowDups) Indicate if duplicate points are allow
void	setClosed(boolean closed) Indicate if the polygon should be closed
void	setX(float x) Set the x position of the left side this shape.
void	setY(float y) Set the y position of the top of this shape.
Shape	transform(Transform transform) Apply a transformation and return a new shape.

Methods inherited from class org.newdawn.slick.geom.Shape

calculateRadius, calculateTriangles, checkPoints, contains, contains, findCenter, getBoundingCircleRadius, getCenter, getCenterX, getCenterY, getHeight, getLocation, getMaxX, getMaxY, getMinX, getMinY, getNormal, getPoint, getPointCount, getPoints, getTriangles, getWidth, getX, getY, hasVertex, includes, increaseTriangulation, indexOf, intersects, preCache, prune, setCenterX, setCenterY, setLocation, setLocation, subtract, union

Methods inherited from class java.lang.Object

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

Constructor Detail

Polygon

public Polygon(float[] points)

Construct a new polygon with 3 or more points. This constructor will take the first set of points and copy them after the last set of points to create a closed shape.

Parameters:

points - An array of points in x, y order.

Polygon

public Polygon()

Create an empty polygon

Method Detail

setAllowDuplicatePoints

public void setAllowDuplicatePoints(boolean allowDups)

Indicate if duplicate points are allow

Parameters:

allowDups - True if duplicate points are allowed

addPoint

public void addPoint(float x,
                     float y)

Add a point to the polygon

Parameters:

x - The x coordinate of the point

y - The y coordinate of the point

transform

public Shape transform(Transform transform)

Apply a transformation and return a new shape. This will not alter the current shape but will return the transformed shape.

Specified by:

transform in class Shape

Parameters:

transform - The transform to be applied

Returns:

The transformed shape.

setX

public void setX(float x)

Description copied from class: Shape

Set the x position of the left side this shape.

Overrides:

setX in class Shape

Parameters:

x - The new x position of the left side this shape.

See Also:

Shape.setX(float)

setY

public void setY(float y)

Description copied from class: Shape

Set the y position of the top of this shape.

Overrides:

setY in class Shape

Parameters:

y - The new y position of the top of this shape.

See Also:

Shape.setY(float)

createPoints

protected void createPoints()

Description copied from class: Shape

Subclasses implement this to create the points of the shape.

Specified by:

createPoints in class Shape

See Also:

Shape.createPoints()

closed

public boolean closed()

Description copied from class: Shape

True if this is a closed shape

Overrides:

closed in class Shape

Returns:

True if this is a closed shape

See Also:

Shape.closed()

setClosed

public void setClosed(boolean closed)

Indicate if the polygon should be closed

Parameters:

closed - True if the polygon should be closed

copy

public Polygon copy()

Provide a copy of this polygon

Returns:

A copy of this polygon