source: golgotha/src/i4/sound/simple_sound3d.cc @ 80

Last change on this file since 80 was 80, checked in by Sam Hocevar, 12 years ago
  • Adding the Golgotha source code. Not sure what's going to be interesting in there, but since it's all public domain, there's certainly stuff to pick up.
File size: 2.3 KB
Line 
1/********************************************************************** <BR>
2  This file is part of Crack dot Com's free source code release of
3  Golgotha. <a href="http://www.crack.com/golgotha_release"> <BR> for
4  information about compiling & licensing issues visit this URL</a>
5  <PRE> If that doesn't help, contact Jonathan Clark at
6  golgotha_source@usa.net (Subject should have "GOLG" in it)
7***********************************************************************/
8
9#include "sound/simple_sound3d.hh"
10#include "error/error.hh"
11
12#define speed_of_sound 512.0
13#define position_to_volume 0.1
14
15i4_simple_3d_sound_manager_class i4_simple_3d_sound;
16
17
18void i4_simple_3d_voice_class::play()
19//{{{
20{
21  update();
22  voc->play();
23}
24//}}}
25
26
27void i4_simple_3d_voice_class::update()
28//{{{
29{
30  i4_frequency freq;
31  i4_volume vol, pan;
32
33  i4_3d_vector a(position);
34  i4_float len = a.length();
35
36  pan = (i4_volume)(a.x*position_to_volume);
37  pan =
38    (pan>=I4_SOUND_VOLUME_LEVELS)? I4_SOUND_VOLUME_LEVELS-1 :
39    ((pan<=-I4_SOUND_VOLUME_LEVELS)? -I4_SOUND_VOLUME_LEVELS+1 : pan);
40
41  if (len<0.0001)
42    a.set(0,0,0);
43  else
44    a /= len;
45  i4_float vel = a.dot(velocity);
46
47  freq = (i4_frequency)((i4_float)frequency)*((-vel + speed_of_sound)/speed_of_sound);
48
49  vol = volume - (i4_volume)(len*position_to_volume);
50  vol = (vol<0)? 0 : vol;
51
52  voc->set_frequency(freq);
53  voc->set_volume(vol);
54  voc->set_pan(pan);
55}
56//}}}
57
58
59void i4_simple_3d_sound_manager_class::init()
60//{{{
61{
62  i4_3d_sound_manager_class::init();
63
64  // note: should theoretically turn itself off if the only sound manager
65  //   available is the null_sound_manager;
66}
67//}}}
68
69
70void i4_simple_3d_sound_manager_class::load_sounds(w32 max_sounds)
71//{{{
72{
73  i4_sound_man->load_sounds(max_sounds);
74}
75//}}}
76
77
78i4_3d_voice_class *i4_simple_3d_sound_manager_class::alloc(i4_sound_id sound_id,
79                                                           const i4_3d_sound_parameters& param)
80//{{{
81{
82  i4_sound_manager_class::sound_parameters dummy;
83
84  dummy.looping = param.looping;
85  dummy.reverb = param.reverb;
86
87  i4_voice_class *voc = i4_sound_man->alloc(sound_id, dummy);
88
89  if (voc)
90    return new i4_simple_3d_voice_class(voc, param);
91  else
92    return 0;
93}
94//}}}
95
96
97//{{{ Emacs Locals
98// Local Variables:
99// folded-file: t
100// End:
101//}}}
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