62 lines
1.7 KiB
GLSL
62 lines
1.7 KiB
GLSL
/**
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* @file class1/deferred/globalF.glsl
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*
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* $LicenseInfo:firstyear=2024&license=viewerlgpl$
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* Second Life Viewer Source Code
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* Copyright (C) 2024, Linden Research, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License only.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
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* $/LicenseInfo$
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*/
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// Global helper functions included in every fragment shader
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// DO NOT declare sampler uniforms here as OS X doesn't compile
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// them out
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uniform float mirror_flag;
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uniform vec4 clipPlane;
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uniform float clipSign;
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void mirrorClip(vec3 pos)
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{
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if (mirror_flag > 0)
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{
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if ((dot(pos.xyz, clipPlane.xyz) + clipPlane.w) < 0.0)
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{
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discard;
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}
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}
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}
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vec4 encodeNormal(vec3 n, float env, float gbuffer_flag)
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{
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float f = sqrt(8 * n.z + 8);
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return vec4(n.xy / f + 0.5, env, gbuffer_flag);
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}
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vec4 decodeNormal(vec4 norm)
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{
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vec2 fenc = norm.xy*4-2;
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float f = dot(fenc,fenc);
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float g = sqrt(1-f/4);
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vec4 n;
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n.xy = fenc*g;
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n.z = 1-f/2;
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return n;
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}
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