public class NullRegion
- extends Region
Java interface to the AST NullRegion class
- a boundless region within a Frame.
The NullRegion class implements a Region with no bounds within a Frame.
If the Negated attribute of a NullRegion is false, the NullRegion
represents a Region containing no points. If the Negated attribute of
a NullRegion is true, the NullRegion represents an infinite Region
(that is, all points in the coordinate system are inside the NullRegion).
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public Licence as
published by the Free Software Foundation; either version 2 of
the Licence, or (at your option) any later version.
This program is distributed in the hope that it will be
useful,but WITHOUT ANY WARRANTY; without even the implied
warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the GNU General Public Licence for more details.
You should have received a copy of the GNU General Public Licence
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street,Fifth Floor, Boston, MA
- See Also:
- AST NullRegion
|Methods inherited from class uk.ac.starlink.ast.Region
getAdaptive, getBounded, getClosed, getFillFactor, getMeshSize, getNegated, getRegionBounds, getRegionFrame, getRegionPoints, getUnc, mapRegion, mask, maskB, maskD, maskF, maskI, maskL, maskS, negate, overlap, setAdaptive, setClosed, setFillFactor, setMeshSize, setNegated, setUnc, showMesh
|Methods inherited from class uk.ac.starlink.ast.Frame
angle, axAngle, axDistance, axOffset, convert, distance, findFrame, format, getActiveUnit, getAlignSystem, getBottom, getDigits, getDigits, getDirection, getDomain, getDut1, getEpoch, getFormat, getLabel, getMatchEnd, getMaxAxes, getMinAxes, getNaxes, getNormUnit, getObsLat, getObsLon, getPermute, getPreserveAxes, getSymbol, getSystem, getTitle, getTop, getUnit, intersect, norm, offset, offset2, permAxes, pickAxes, resolve, setActiveUnit, setAlignSystem, setBottom, setDigits, setDigits, setDirection, setDomain, setDut1, setEpoch, setEpoch, setFormat, setLabel, setMatchEnd, setMaxAxes, setMinAxes, setObsLat, setObsLon, setPermute, setPreserveAxes, setSymbol, setSystem, setTitle, setTop, setUnit, unformat
|Methods inherited from class uk.ac.starlink.ast.Mapping
decompose, getInvert, getNin, getNout, getReport, getTranForward, getTranInverse, invert, linearApprox, mapBox, mapSplit, rate, rebin, rebinD, rebinF, rebinI, resample, resampleB, resampleD, resampleF, resampleI, resampleL, resampleS, setInvert, setReport, simplify, tran1, tran2, tranGrid, tranN, tranP
|Methods inherited from class uk.ac.starlink.ast.AstObject
annul, clear, copy, delete, equals, finalize, getAstConstantI, getB, getC, getD, getF, getI, getID, getIdent, getL, getNobject, getObjSize, getRefCount, hashCode, isThreaded, reportVersions, sameObject, set, setB, setC, setD, setF, setI, setID, setIdent, setL, show, test, tune
public NullRegion(Frame frame,
- Create a NullRegion.
This function creates a new NullRegion and optionally initialises its
A NullRegion is a Region with no bounds. If the Negated attribute of a
NullRegion is false, the NullRegion represents a Region containing no
points. If the Negated attribute of a NullRegion is true, the NullRegion
represents an infinite Region containing all points within the
- A null Object pointer (AST__NULL) will be returned if this
function is invoked with the AST error status set, or if it
should fail for any reason.
frame - A pointer to the Frame in which the region is defined. A deep
copy is taken of the supplied Frame. This means that any
subsequent changes made to the Frame using the supplied pointer
will have no effect the Region.
unc - An optional pointer to an existing Region which specifies the
uncertainties associated with positions in the supplied Frame.
The uncertainty in any point in the Frame is found by shifting the
supplied "uncertainty" Region so that it is centred at the point
being considered. The area covered by the shifted uncertainty
Region then represents the uncertainty in the position. The
uncertainty is assumed to be the same for all points.
If supplied, the uncertainty Region must be of a class for which
all instances are centro-symetric (e.g. Box, Circle, Ellipse, etc.)
or be a Prism containing centro-symetric component Regions. A deep
copy of the supplied Region will be taken, so subsequent changes to
the uncertainty Region using the supplied pointer will have no
effect on the created Box. Alternatively,
a NULL Object pointer
may be supplied, in which case a default uncertainty of zero is
AstException - if an error occurred in the AST library
Copyright © 2018 Central Laboratory of the Research Councils. All Rights Reserved.