net.aerith.misao.util
Class CircumArea

java.lang.Object
  |
  +--net.aerith.misao.util.CircumArea

public class CircumArea

extends java.lang.Object

The CircumArea represents a circumscribed area around the specified circle on the celestial sphere, which consists of the maximum and minimum value of R.A. and Decl. of the specified circle.

Field Summary

private Coor	center_coor The R.A.
private double	center_decl_near_pole The Decl.
private double	corner_decl_far_pole The Decl.
private double	corner_decl_near_pole The Decl.
private double	decl_most_north The Decl.
private double	decl_most_south The Decl.
private static double	sqrt2 The sqrt(2).
private double	width_in_RA The difference between maximum R.A.

Constructor Summary

CircumArea(Coor coor, double radius)
Constructs a CircumArea of the specified circle.

Method Summary

double	getDeclMostNorth() Gets the Decl.
double	getDeclMostSouth() Gets the Decl.
double	getWidthInRA() Gets the difference between maximum R.A.
boolean	inArea(Coor coor) Judges if the specified R.A.
boolean	overlapsArea(Coor start_coor, Coor end_coor) Judges if the specified rectangle area is overlapping on this CircumArea.
protected java.lang.String	paramString() Returns a raw string representation of the state of this object, for debugging use.
java.lang.String	toString() Returns a string representation of the state of this object, for debugging use.

Methods inherited from class java.lang.Object

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

Field Detail

center_coor

private Coor center_coor

The R.A. and Decl. of the center.

center_decl_near_pole

private double center_decl_near_pole

The Decl. of the center point on the line near to the pole.

corner_decl_near_pole

private double corner_decl_near_pole

The Decl. of the corner near to the pole.

corner_decl_far_pole

private double corner_decl_far_pole

The Decl. of the corner far from the pole.

decl_most_north

private double decl_most_north

The Decl. of most to the north.

decl_most_south

private double decl_most_south

The Decl. of most to the south.

width_in_RA

private double width_in_RA

The difference between maximum R.A. and minimum R.A.

sqrt2

private static final double sqrt2

The sqrt(2).

Constructor Detail

CircumArea

public CircumArea(Coor coor,
                  double radius)

Constructs a CircumArea of the specified circle. All the parameters required to judge area overlapping, etc. are calculated in this constructor.

Parameters:

coor - the R.A. and Decl. of the center.

radius - the radius of the circle in degree.

Method Detail

getDeclMostNorth

public double getDeclMostNorth()

Gets the Decl. of most to the north.

Returns:

the Decl. of most to the north.

getDeclMostSouth

public double getDeclMostSouth()

Gets the Decl. of most to the south.

Returns:

the Decl. of most to the south.

getWidthInRA

public double getWidthInRA()

Gets the difference between maximum R.A. and minimum R.A.

Returns:

the difference between maximum R.A. and minimum R.A.

overlapsArea

public boolean overlapsArea(Coor start_coor,
                            Coor end_coor)

Judges if the specified rectangle area is overlapping on this CircumArea.

Parameters:

start_coor - the R.A. and Decl. of the minimal corner.

end_coor - the R.A. and Decl. of the maximal corner.

Returns:

true if the specified rectangle is overlapping.

inArea

public boolean inArea(Coor coor)

Judges if the specified R.A. and Decl. is within this CircumArea.

Parameters:

coor - the R.A. and Decl. to judge.

Returns:

true if the specified R.A. and Decl. is within this area.

paramString

protected java.lang.String paramString()

Returns a raw string representation of the state of this object, for debugging use.

Returns:

a string representation of the state of this object.

toString

public java.lang.String toString()

Returns a string representation of the state of this object, for debugging use.

Overrides:

toString in class java.lang.Object

Returns:

a string representation of the state of this object.