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.TH c_dspnt3d 3NCARG "September 1997-1998" UNIX "NCAR GRAPHICS"
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.SH NAME
c_dspnt3d - interpolate double precision 3D data at specified points
.SH FUNCTION PROTOTYPE
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.cs R 24
void c_dspnt3d(int, double [], double [], double [], double[]
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int, double [], double [], double [], double *, int *);
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.cs R
.SH SYNOPSIS
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.cs R 24
void c_dspnt3d(int n, double xi[], double yi[], double zi[], double ui[],
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               int m, double xo[], double yo[], double zo[], double *uo,
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               int *ier)
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.cs R
.SH DESCRIPTION 
.IP n 12
The number of input data points.
.IP xi 12
An array containing the X coordinates of the input data points.
.IP yi 12
An array containing the Y coordinates of the input data points.
.IP zi 12
An array containing the Z coordinates of the input data points.
.IP ui 12
An array containing the functional values of the input data 
points. That is, ui[l] is the value of the input function at 
coordinate (xi[l],yi[l],zi[l]), for 0 <= l < n .
.IP m 12
The number of output data points (this may be "1"). 
.IP xo 12
An array of dimension m containing the X coordinates of the 
output data. The values in xo may be in any order. 
.IP yo 12
An array of dimension m containing the Y coordinates of the 
output data. The values in xo may be in any order. 
.IP zo 12
An array of dimension m containing the Z coordinates of the 
output data. The values in xo may be in any order. 
.IP uo 12
A pointer to a double. Space for m doubles is allocated for uo by 
dspnt3d. zo[i] is the interpolated value at point 
(xo[i],yo[i],zo[i]) for 0 <= i < n .
.IP ier 12
An error return value. If *ier is returned as 0, then no errors 
were detected. If *ier is non-zero, then refer to the man page
for dsgrid_errors.
.SH USAGE
This function is called to interpolate double precision 3D 
data at a specified point or points.
.SH ACCESS
To use c_dspnt3d, load the NCAR Graphics library ngmath.
.SH SEE ALSO
dsgrid,
dsgrid_params.
.sp
Complete documentation for Dsgrid is available at URL
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http://ngwww.ucar.edu/ngdoc/ng/ngmath/dsgrid/dshome.html
.SH COPYRIGHT
Copyright (C) 2000
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University Corporation for Atmospheric Research
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The use of this Software is governed by a License Agreement.