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
|
/**
* @file class3\wl\transportF.glsl
*
* $LicenseInfo:firstyear=2007&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2007, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
//////////////////////////////////////////////////////////
// The fragment shader for the terrain atmospherics
//////////////////////////////////////////////////////////
vec3 getAdditiveColor();
vec3 getAtmosAttenuation();
uniform int no_atmo;
vec3 atmosTransportFrag(vec3 light, vec3 additive, vec3 atten)
{
if (no_atmo == 1)
{
return light;
}
return (light + additive) * atten * 2.0;
}
vec3 fullbrightAtmosTransportFrag(vec3 light, vec3 additive, vec3 atten)
{
if (no_atmo == 1)
{
return light;
}
float brightness = dot(light.rgb, vec3(0.33333));
return mix(atmosTransportFrag(light.rgb, additive,atten), light.rgb + additive.rgb, brightness * brightness);
}
vec3 fullbrightShinyAtmosTransportFrag(vec3 light, vec3 additive, vec3 atten)
{
if (no_atmo == 1)
{
return light;
}
float brightness = dot(light.rgb, vec3(0.33333));
return mix(atmosTransportFrag(light.rgb, additive, atten), (light.rgb + additive.rgb) * (2.0 - brightness), brightness * brightness);
}
vec3 atmosTransport(vec3 light)
{
return atmosTransportFrag(light, getAdditiveColor(), getAtmosAttenuation());
}
vec3 fullbrightAtmosTransport(vec3 light)
{
return fullbrightAtmosTransportFrag(light, getAdditiveColor(), getAtmosAttenuation());
}
vec3 fullbrightShinyAtmosTransport(vec3 light)
{
return fullbrightShinyAtmosTransportFrag(light, getAdditiveColor(), getAtmosAttenuation());
}
|
