lt.monarch.chart.engine
Interface Projector

All Superinterfaces:

java.lang.Cloneable

All Known Subinterfaces:

Projector2D

All Known Implementing Classes:

DirectProjector, PolarProjector, Projector3D, SimpleProjector2D, SimpleProjector3D

public interface Projector
extends java.lang.Cloneable

Projector is responsible for mapping n-dimensional points to 2D points.

Method Summary

Modifier and Type	Method and Description
java.lang.Object	clone() Clones this projector
Rectangle2D	getProjectionArea() Returns a 2D projection space
Rectangle2D	getProjectionAreaReference() Returns a 2D projection space reference
void	prepare() Prepares the projector.
GeneralPoint	project(GeneralPoint point) Projects a n-dimensional point into a 2D Point.
GeneralPoint	project(GeneralPoint point, GeneralPoint template) Projects a n-dimensional point into a 2D Point.
Polygon2D	project(Rectangle2D r) Projects a rectangle into polygon.
void	setProjectionArea(Rectangle2D r) Sets a 2D projection space

Method Detail

setProjectionArea

void setProjectionArea(Rectangle2D r)

Sets a 2D projection space

Parameters:

r - projection space

getProjectionArea

Rectangle2D getProjectionArea()

Returns a 2D projection space

Returns:

projection space

getProjectionAreaReference

Rectangle2D getProjectionAreaReference()

Returns a 2D projection space reference

Returns:

projection space

project

GeneralPoint project(GeneralPoint point)

Projects a n-dimensional point into a 2D Point.

Parameters:

point - n-dimensional point

Returns:

creates and returns a 2D Point

project

GeneralPoint project(GeneralPoint point,
                     GeneralPoint template)

Projects a n-dimensional point into a 2D Point. A 2D point is template is used to avoid unnecessary object creation

Parameters:

point - n-dimensional point

template - point object, to be changed

Returns:

template value

project

Polygon2D project(Rectangle2D r)

Projects a rectangle into polygon.

Parameters:

r - 2D rectangle

Returns:

projected polygon

prepare

void prepare()

Prepares the projector. Allows the projector to do some tedious calculations in advance.

clone

java.lang.Object clone()

Clones this projector

Returns:

cloned projector