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A Library for Handling
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Description:
This routine applies a
Mapping
to transform the coordinates of a set of points in two dimensions.
Invocation
CALL AST_TRAN2(
THIS, NPOINT, XIN, YIN, FORWARD, XOUT, YOUT, STATUS )
Arguments
THIS = INTEGER
(Given)
Pointer to the Mapping to be applied.
NPOINT = INTEGER (Given)
The number of points
to be transformed.
XIN( NPOINT ) = DOUBLE PRECISION (Given)
An array of X-coordinate
values for the input (untransformed) points.
YIN( NPOINT ) = DOUBLE PRECISION (Given)
An
array of Y-coordinate values for the input (untransformed) points.
FORWARD = LOGICAL (Given)
A .TRUE. value indicates that the Mapping’
s forward coordinate transformation is to be applied,
while a .FALSE. value indicates that the inverse transformation should be used.
XOUT(
NPOINT ) = DOUBLE PRECISION (Returned)
An array into which the X-coordinates of the
output (transformed) points will be written.
YOUT( NPOINT ) = DOUBLE PRECISION
(Returned)
An array into which the Y-coordinates of the output (transformed) points will
be written.
STATUS = INTEGER (Given and Returned)
The global status.
Notes:
Copyright (C) 2017 East Asian Observatory
- ←Prev
- AST
A Library for Handling
World Coordinate
Systems
in Astronomy - Next→
- TOC ↑