c_dspnt3d(3NCARG)

💖 c_dspnt3d — bestie edition 💖

okay so this is a page from the NCAR GRAPHICS manual, and it's all about c_dspnt3d, a little function that takes your 3D data and interpolates it at whatever points you want. no cap. let's get into it 🦋

✨ NAME ✨

c_dspnt3d — interpolate double precision 3D data at specified points 💅

🌸 FUNCTION PROTOTYPE 🌸

here's the signature, exactly as it is, don't touch it:

void c_dspnt3d(int, double [], double [], double [], double[]
int, double [], double [], double [], double *, int *);

🎀 SYNOPSIS 🎀

same thing but with the names filled in, and honestly it's giving main character energy:

void c_dspnt3d(int n, double xi[], double yi[], double zi[], double ui[],
               int m, double xo[], double yo[], double zo[], double *uo,
               int *ier)

🫶 DESCRIPTION 🫶

okay so here's every single argument, one by one, no skipping, we're doing this properly:

• n — the number of input data points. that's it, that's the count 🍓
• xi — an array holding the X coordinates of your input data points.
• yi — an array holding the Y coordinates of your input data points.
• zi — an array holding the Z coordinates of your input data points.
• ui — an array holding the functional values of your input data points. so like, ui[l] is the value of the input function at coordinate (xi[l],yi[l],zi[l]), for 0 <= l < n . yes bestie, lowercase L, not a one. iykyk 💀
• m — the number of output data points. and yes, this may be "1" — you can absolutely just ask for one lonely little point, she's valid 🌈
• xo — an array of dimension m containing the X coordinates of the output data. the values in xo may be in any order. (she does not care, she is flexible)
• yo — an array of dimension m containing the Y coordinates of the output data. the values in xo may be in any order. (yes, it says xo here, that's literally what the page says, i'm not fixing it, i'm just reporting it 🙈)
• zo — an array of dimension m containing the Z coordinates of the output data. the values in xo may be in any order. (same energy, same wording, keeping it fr fr)
• uo — a pointer to a double. space for m doubles is allocated for uo by dspnt3d. and zo[i] is the interpolated value at point (xo[i],yo[i],zo[i]) for 0 <= i < n . ✨
• ier — the error return value. if *ier comes back as 0, then no errors were detected, slay. if *ier is non-zero, then go read the man page for dsgrid_errors. it will explain. go. 🏃‍♀️

💜 USAGE 💜

you call this function to interpolate double precision 3D data at a specified point or points. one point, forty points, whatever, she's ready 💅

⭐ ACCESS ⭐

to use c_dspnt3d, load the NCAR Graphics library ngmath. that's the vibe check and it passed 🌸

🔥 SEE ALSO 🔥

• dsgrid
• dsgrid_params

also, complete documentation for Dsgrid is available at this URL, copy it exactly bestie:

http://ngwww.ucar.edu/ngdoc/ng/ngmath/dsgrid/dshome.html

👑 COPYRIGHT 👑

Copyright (C) 2000
University Corporation for Atmospheric Research

The use of this Software is governed by a License Agreement.

okay so real talk — this software is governed by a License Agreement. that's not a vibe suggestion, that's a whole legal situation, so read it. 💀

and that's the whole page, you ate it, you understood it, you're literally a 3D interpolation icon now 🧚

this was c_dspnt3d(3NCARG) from the NCAR GRAPHICS manual, dated September 1997-1998, living its best UNIX life. mwah. 🎀💖