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(**
* display_glut.sml
*
* @copyright (C) 2021 SML# Development Team.
* @author UENO Katsuhiro
* @version $Id: display_glut.sml,v 1.3 2007/04/02 09:42:29 katsu Exp $
*)
structure Display : DISPLAY =
struct
structure PS = PowerSpectrum(
val numSamples = 1024
val samplingFreq = 44100.0
)
structure SA = SpectrumAnalyzer(PS)
structure IN = Input(PS)
val interval = floor (PS.interval * 1000.0) (* msec *)
val interval = interval * 2
fun repeat 0 f = ()
| repeat n f = (f n; repeat (n - 1) f)
open GL GLU GLUT
infix ++
val op ++ = Word.orb
val progname = "smlsharp"
val input = ref NONE : IN.input option ref
val spectrums = ref nil : real array list ref
val summarySize = 100
val x = ref 280.0
val y = ref 50.0
val z = ref 360.0
val vx = ref 80.0
val vy = ref 50.0
val vz = ref 10.0
fun plotSpectrum (ary, z) =
(
Array.appi
(fn (x, h) =>
let
val x = real x
val b = 1.0 - x * 1.0 / real (Array.length ary)
val g = 0.2 + 0.8 * x / real (Array.length ary)
val f = 1.0 - z * 0.008
val f = if f < 1.0 then f * 0.5 else f
in
glColor3d (0.2 * f, g * f, b * f);
glVertex3d (x, 0.0, ~z);
glVertex3d (x, h, ~z)
end)
ary
)
fun plot z nil = nil
| plot z (ary::arrays) =
if z > 100.0 then nil
else ary :: plot (z + 1.0) arrays before plotSpectrum (ary, z)
fun display () =
(
glClear (GL_COLOR_BUFFER_BIT);
glLoadIdentity ();
gluLookAt (!x, !y, !z, !vx, !vy, !vz, 0.0, 1.0, 0.0);
glBegin GL_LINES;
spectrums := plot 0.0 (!spectrums);
glColor3d (0.8, 0.0, 0.0);
glVertex3d (~3.0, 0.0, 0.0);
glVertex3d (~3.0, 100.0, 0.0);
glVertex3d (0.0, 0.0, 0.0);
glVertex3d (100.0, 0.0, 0.0);
repeat 10 (fn n =>
let val x = if n mod 5 = 0 then ~0.5 else ~1.5
val y = real n * 10.0
in glVertex3d (~3.0, y, 0.0);
glVertex3d (x, y, 0.0)
end);
glEnd ();
glutSwapBuffers ()
)
fun resize (w, h) =
(
glViewport (0, 0, w, h);
glMatrixMode GL_PROJECTION;
glLoadIdentity ();
gluPerspective (15.0, real w / real h, 1.0, 2000.0);
glMatrixMode GL_MODELVIEW
)
fun timer n =
let
val ary = Array.array (summarySize, 0.0)
in
IN.read (valOf (!input));
SA.toMonoral (IN.buffer, PS.samples);
PS.calc ();
SA.powerToHeight PS.spectrum;
SA.summarize (PS.spectrum, 0, Array.length PS.spectrum, ary);
spectrums := ary :: !spectrums;
glutPostRedisplay ();
glutTimerFunc (interval, timer, 0)
end
fun idle () =
(
while IN.fill (valOf (!input)) do ();
()
)
fun keyboard (c, _:int, _:int) =
(
case chr c of
#"j" => x := !x + 1.0
| #"k" => y := !y + 1.0
| #"l" => z := !z + 1.0
| #"J" => x := !x - 1.0
| #"K" => y := !y - 1.0
| #"L" => z := !z - 1.0
| #"u" => vx := !vx + 1.0
| #"i" => vy := !vy + 1.0
| #"o" => vz := !vz + 1.0
| #"U" => vx := !vx - 1.0
| #"I" => vy := !vy - 1.0
| #"O" => vz := !vz - 1.0
| _ => ();
print (Real.toString (!x)^", "^
Real.toString (!y)^", "^
Real.toString (!z)^", "^
Real.toString (!vx)^", "^
Real.toString (!vy)^", "^
Real.toString (!vz)^"\n")
)
fun main () =
(
glutInit (ref 1, Array.fromList [progname]);
glutInitDisplayMode (GLUT_RGBA ++ GLUT_DOUBLE);
glutInitWindowSize (640, 480);
glutCreateWindow progname;
glutDisplayFunc display;
(*
glutKeyboardFunc keyboard;
*)
glutReshapeFunc resize;
glutTimerFunc (interval, timer, 0);
input := SOME (IN.openInput ());
glutIdleFunc idle;
glClearColor (0.02, 0.02, 0.02, 1.0);
IN.startInput (valOf (!input));
glutMainLoop ()
)
end
|
