/indra/newview/app_settings/shaders/class1/lighting/sumLightsV.glsl

 1/**
 2 * @file sumLightsV.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 
26uniform vec4 light_position[8];
27uniform vec3 light_diffuse[8];
28
29float calcDirectionalLight(vec3 n, vec3 l);
30
31vec3 atmosAmbient(vec3 light);
32vec3 atmosAffectDirectionalLight(float lightIntensity);
33vec3 scaleDownLight(vec3 light);
34
35vec4 sumLights(vec3 pos, vec3 norm, vec4 color, vec4 baseLight)
36{
37	vec4 col;
38	col.a = color.a;
39	
40	col.rgb = light_diffuse[1].rgb * calcDirectionalLight(norm, light_position[1].xyz);
41	col.rgb = scaleDownLight(col.rgb);
42	col.rgb += atmosAmbient(baseLight.rgb);
43	col.rgb += atmosAffectDirectionalLight(calcDirectionalLight(norm, light_position[0].xyz));
44	
45	col.rgb = min(col.rgb*color.rgb, 1.0);
46	
47	return col;	
48}
49
50