/usr/share/doc/libplplot12/examples/ocaml/x08.ml is in libplplot-dev 5.10.0+dfsg-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 | (* $Id: x08.ml 11680 2011-03-27 17:57:51Z airwin $
3-d plot demo.
Copyright (C) 2004 Alan W. Irwin
Copyright (C) 2004 Rafael Laboissiere
Copyright (C) 2008 Hezekiah M. Carty
This file is part of PLplot.
PLplot is free software; you can redistribute it and/or modify
it under the terms of the GNU Library General Public License as published
by the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
PLplot 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 Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with PLplot; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*)
open Plplot
let pi = atan 1.0 *. 4.0
let xpts = 35 (* Data points in x *)
let ypts = 46 (* Data points in y *)
let alt = [|60.0; 20.0|]
let az = [|30.0; 60.0|]
let title =
[|
"#frPLplot Example 8 - Alt=60, Az=30";
"#frPLplot Example 8 - Alt=20, Az=60";
|]
(*--------------------------------------------------------------------------*\
* cmap1_init1
*
* Initializes color map 1 in HLS space.
* Basic grayscale variation from half-dark (which makes more interesting
* looking plot compared to dark) to light.
* An interesting variation on this:
* s[1] = 1.0
\*--------------------------------------------------------------------------*)
let cmap1_init gray =
let i = [|0.0; 1.0|] in (* left and right boundaries *)
let h, l, s =
if gray then (
[|0.0; 0.0|], (* hue -- low: red (arbitrary if s=0) *)
(* hue -- high: red (arbitrary if s=0) *)
[|0.5; 1.0|], (* lightness -- low: half-dark *)
(* lightness -- high: light *)
[|0.0; 0.0|] (* minimum saturation *)
(* minimum saturation *)
)
else (
[|240.0; 0.0|], (* blue -> green -> yellow -> *)
(* -> red *)
[|0.6; 0.6|],
[|0.8; 0.8|]
)
in
plscmap1n 256;
plscmap1l false i h l s None;
()
let levels = 10
(*--------------------------------------------------------------------------*\
* Does a series of 3-d plots for a given data set, with different
* viewing options in each plot.
\*--------------------------------------------------------------------------*)
let () =
let nlevel = levels in
let rosen = true in
(* Parse and process command line arguments *)
plparseopts Sys.argv [PL_PARSE_FULL];
(* Initialize plplot *)
plinit ();
(* Allocate data structures *)
let z = Array.make_matrix xpts ypts 0.0 in
let x =
Array.init xpts (
fun i ->
(float_of_int (i - (xpts / 2)) /. float_of_int (xpts / 2)) *.
if rosen then
1.5
else
1.0
)
in
let y =
Array.init ypts (
fun i ->
float_of_int (i - (ypts / 2)) /. float_of_int (ypts / 2) +.
if rosen then
0.5
else
0.0
)
in
for i = 0 to xpts - 1 do
let xx = x.(i) in
for j = 0 to ypts - 1 do
let yy = y.(j) in
if rosen then (
z.(i).(j) <- (1.0 -. xx)**2. +. 100. *. (yy -. xx**2.)**2.0;
(* The log argument may be zero for just the right grid. *)
if z.(i).(j) > 0.0 then
z.(i).(j) <- log z.(i).(j)
else
z.(i).(j) <- -5. (* -MAXFLOAT would mess-up up the scale *)
)
else (
let r = sqrt (xx *. xx +. yy *. yy) in
z.(i).(j) <- exp (-.r *. r) *. cos (2.0 *. pi *. r)
)
done
done;
let zmax, zmin = plMinMax2dGrid z in
let step = (zmax -. zmin) /. float_of_int (nlevel + 1) in
let clevel =
Array.init nlevel (fun i -> zmin +. step +. step *. float_of_int i)
in
pllightsource 1.0 1.0 1.0;
for k = 0 to 1 do
for ifshade = 0 to 3 do
pladv 0;
plvpor 0.0 1.0 0.0 0.9;
plwind (-1.0) 1.0 (-0.9) 1.1;
plcol0 3;
plmtex "t" 1.0 0.5 0.5 title.(k);
plcol0 1;
if rosen then
plw3d 1.0 1.0 1.0 (-1.5) 1.5 (-0.5) 1.5 zmin zmax alt.(k) az.(k)
else
plw3d 1.0 1.0 1.0 (-1.0) 1.0 (-1.0) 1.0 zmin zmax alt.(k) az.(k);
plbox3 "bnstu" "x axis" 0.0 0
"bnstu" "y axis" 0.0 0
"bcdmnstuv" "z axis" 0.0 0;
plcol0 2;
match ifshade with
0 -> (* diffuse light surface plot *)
cmap1_init true;
plsurf3d x y z [PL_DIFFUSE] [||];
| 1 -> (* magnitude colored plot *)
cmap1_init false;
plsurf3d x y z [PL_MAG_COLOR] [||];
| 2 -> (* magnitude colored plot with faceted
squares *)
cmap1_init false;
plsurf3d x y z [PL_MAG_COLOR; PL_FACETED] [||];
| _ -> (* magnitude colored plot with contours *)
cmap1_init false;
plsurf3d x y z [PL_MAG_COLOR; PL_SURF_CONT; PL_BASE_CONT] clevel;
done
done;
(* Clean up *)
plend ();
()
|