public class LutMap extends Mapping
Each input coordinate value is first scaled to give the index of an entry in the table by subtracting a starting value (the input coordinate corresponding to the first table entry) and dividing by an increment (the difference in input coordinate value between adjacent table entries).
The resulting index will usually contain a fractional part, so the output coordinate value is then generated by interpolating linearly between the appropriate entries in the table. If the index lies outside the range of the table, linear extrapolation is used based on the two nearest entries (i.e. the two entries at the start or end of the table, as appropriate). If either of the entries used for the interplation has a value of AST__BAD, then the interpolated value is returned as AST__BAD.
If the lookup table entries increase or decrease monotonically (ignoring any flat sections), then the inverse transformation may also be performed.
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 021101301, USA
Mapping.Interpolator, Mapping.Spreader
LINEAR_INTERPOLATOR, LINEAR_SPREADER, NEAREST_INTERPOLATOR, NEAREST_SPREADER
AST__BAD, AST__TUNULL, pointer
Constructor and Description 

LutMap(double[] lut,
double start,
double inc)
Create a LutMap.

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
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 LutMap(double[] lut, double start, double inc)
lut
 An array containing the lookup table entries. There must be
at least two elements.start
 The input coordinate value which corresponds to the first lookup
table entry.inc
 The lookup table spacing (the increment in input coordinate
value between successive lookup table entries). This value
may be positive or negative, but must not be zero.AstException
 if an error occurred in the AST libraryCopyright © 2024 Central Laboratory of the Research Councils. All Rights Reserved.