/indra/newview/app_settings/shaders/class1/lighting/lightFuncSpecularV.glsl
Unknown | 66 lines | 52 code | 14 blank | 0 comment | 0 complexity | 18c2b4889cf53c450e050bd2b8a87f1f MD5 | raw file
Possible License(s): LGPL-2.1
- /**
- * @file lightFuncSpecularV.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
- * $/LicenseInfo$
- */
-
- float calcDirectionalLight(vec3 n, vec3 l)
- {
- float a = max(dot(n,l),0.0);
- return a;
- }
- float calcDirectionalSpecular(vec3 view, vec3 n, vec3 l)
- {
- return pow(max(dot(reflect(view, n),l), 0.0),8.0);
- }
- float calcDirectionalLightSpecular(inout vec4 specular, vec3 view, vec3 n, vec3 l, vec3 lightCol, float da)
- {
-
- specular.rgb += calcDirectionalSpecular(view,n,l)*lightCol*da;
- return max(dot(n,l),0.0);
- }
- vec3 calcPointLightSpecular(inout vec4 specular, vec3 view, vec3 v, vec3 n, vec3 l, float r, float pw, vec3 lightCol)
- {
- //get light vector
- vec3 lv = l-v;
-
- //get distance
- float d = length(lv);
-
- //normalize light vector
- lv *= 1.0/d;
-
- //distance attenuation
- float da = clamp(1.0/(r * d), 0.0, 1.0);
-
- //angular attenuation
-
- da *= calcDirectionalLightSpecular(specular, view, n, lv, lightCol, da);
-
- return da*lightCol;
- }