org.newdawn.slick.geom
Class Ellipse

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

All Implemented Interfaces:

java.io.Serializable

Direct Known Subclasses:

Circle

public class Ellipse
extends Shape

An ellipse meeting the Shape contract. The ellipse is actually an approximation using a series of points generated around the contour of the ellipse.

Author:

Mark

See Also:

Serialized Form

Field Summary

protected static int

DEFAULT_SEGMENT_COUNT Default number of segments to draw this ellipse with

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

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

Constructor Summary

Ellipse(float centerPointX, float centerPointY, float radius1, float radius2)
Creates a new Ellipse object.

Ellipse(float centerPointX, float centerPointY, float radius1, float radius2, int segmentCount)
Creates a new Ellipse object.

Method Summary

protected void	calculateRadius() Calculate the radius of a circle that can completely enclose this shape.
protected void	createPoints() Generate the points to outline this ellipse.
protected void	findCenter() Get the center of this polygon.
float	getRadius1() Get the horizontal radius of the ellipse
float	getRadius2() Get the vertical radius of the ellipse
void	setRadii(float radius1, float radius2) Change the shape of this Ellipse
void	setRadius1(float radius1) Set the horizontal radius of the ellipse
void	setRadius2(float radius2) Set the vertical radius of the ellipse
Shape	transform(Transform transform) Apply a transformation and return a new shape.

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

calculateTriangles, checkPoints, closed, contains, contains, 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, setX, setY, subtract, union

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_SEGMENT_COUNT

protected static final int DEFAULT_SEGMENT_COUNT

Default number of segments to draw this ellipse with

See Also:

Constant Field Values

Constructor Detail

Ellipse

public Ellipse(float centerPointX,
               float centerPointY,
               float radius1,
               float radius2)

Creates a new Ellipse object.

Parameters:

centerPointX - x coordinate of the center of the ellipse

centerPointY - y coordinate of the center of the ellipse

radius1 - horizontal radius

radius2 - vertical radius

Ellipse

public Ellipse(float centerPointX,
               float centerPointY,
               float radius1,
               float radius2,
               int segmentCount)

Creates a new Ellipse object.

Parameters:

centerPointX - x coordinate of the center of the ellipse

centerPointY - y coordinate of the center of the ellipse

radius1 - horizontal radius

radius2 - vertical radius

segmentCount - how fine to make the ellipse.

Method Detail

setRadii

public void setRadii(float radius1,
                     float radius2)

Change the shape of this Ellipse

Parameters:

radius1 - horizontal radius

radius2 - vertical radius

getRadius1

public float getRadius1()

Get the horizontal radius of the ellipse

Returns:

The horizontal radius of the ellipse

setRadius1

public void setRadius1(float radius1)

Set the horizontal radius of the ellipse

Parameters:

radius1 - The horizontal radius to set

getRadius2

public float getRadius2()

Get the vertical radius of the ellipse

Returns:

The vertical radius of the ellipse

setRadius2

public void setRadius2(float radius2)

Set the vertical radius of the ellipse

Parameters:

radius2 - The vertical radius to set

createPoints

protected void createPoints()

Generate the points to outline this ellipse.

Specified by:

createPoints in class Shape

transform

public Shape transform(Transform transform)

Description copied from class: Shape

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.

See Also:

Shape.transform(org.newdawn.slick.geom.Transform)

findCenter

protected void findCenter()

Description copied from class: Shape

Get the center of this polygon.

Overrides:

findCenter in class Shape

See Also:

Shape.findCenter()

calculateRadius

protected void calculateRadius()

Description copied from class: Shape

Calculate the radius of a circle that can completely enclose this shape.

Overrides:

calculateRadius in class Shape

See Also:

Shape.calculateRadius()