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/**
* @file class2\wl\atmosphericsF.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
* $/LicenseInfo$
*/
vec3 getAdditiveColor();
vec3 getAtmosAttenuation();
vec3 scaleSoftClipFrag(vec3 light);
vec3 srgb_to_linear(vec3 col);
vec3 linear_to_srgb(vec3 col);
uniform int sun_up_factor;
vec3 atmosFragLighting(vec3 light, vec3 additive, vec3 atten)
{
light *= atten.r;
additive = srgb_to_linear(additive*2.0);
// magic 1.25 here is to match the default RenderSkyHDRScale -- this parameter needs to be plumbed into sky settings or something
// so it's available to all shaders that call atmosFragLighting instead of just softenLightF.glsl
additive *= sun_up_factor*1.25 + 1.0;
light += additive;
return light;
}
vec3 atmosFragLightingLinear(vec3 light, vec3 additive, vec3 atten)
{
return atmosFragLighting(light, additive, atten);
}
vec3 atmosLighting(vec3 light)
{
return atmosFragLighting(light, getAdditiveColor(), getAtmosAttenuation());
}
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