/indra/newview/app_settings/shaders/class2/windlight/atmosphericsHelpersV.glsl

 1/**
 2 * @file atmosphericsHelpersV.glsl
 3 *
 4 * $LicenseInfo:firstyear=2005&license=viewerlgpl$
 5 * Second Life Viewer Source Code
 6 * Copyright (C) 2005, Linden Research, Inc.
 7 * 
 8 * This library is free software; you can redistribute it and/or
 9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation;
11 * version 2.1 of the License only.
12 * 
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16 * Lesser General Public License for more details.
17 * 
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
21 * 
22 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
23 * $/LicenseInfo$
24 */
25 
26
27
28// Output variables
29vec3 getSunlitColor();
30vec3 getAmblitColor();
31vec3 getAdditiveColor();
32vec3 getAtmosAttenuation();
33vec3 getPositionEye();
34
35uniform float scene_light_strength;
36
37vec3 atmosAmbient(vec3 light)
38{
39	return getAmblitColor() + light / 2.0;
40}
41
42vec3 atmosAffectDirectionalLight(float lightIntensity)
43{
44	return getSunlitColor() * lightIntensity;
45}
46
47vec3 atmosGetDiffuseSunlightColor()
48{
49	return getSunlitColor();
50}
51
52vec3 scaleDownLight(vec3 light)
53{
54	return (light / scene_light_strength );
55}
56
57vec3 scaleUpLight(vec3 light)
58{
59	return (light * scene_light_strength);
60}
61