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/**
* @file class1/deferred/globalF.glsl
*
* $LicenseInfo:firstyear=2024&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2024, 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
* $/LicenseInfo$
*/
// Global helper functions included in every fragment shader
// DO NOT declare sampler uniforms here as OS X doesn't compile
// them out
uniform float mirror_flag;
uniform vec4 clipPlane;
uniform float clipSign;
void mirrorClip(vec3 pos)
{
if (mirror_flag > 0.0)
{
if ((dot(pos.xyz, clipPlane.xyz) + clipPlane.w) < 0.0)
{
discard;
}
}
}
vec4 encodeNormal(vec3 n, float env, float gbuffer_flag)
{
float f = sqrt(8 * n.z + 8);
return vec4(n.xy / f + 0.5, env, gbuffer_flag);
}
vec4 decodeNormal(vec4 norm)
{
vec2 fenc = norm.xy*4-2;
float f = dot(fenc,fenc);
float g = sqrt(1-f/4);
vec4 n;
n.xy = fenc*g;
n.z = 1-f/2;
return n;
}
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