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/**
* @file class2/deferred/reflectionProbeF.glsl
*
* $LicenseInfo:firstyear=2022&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2022, 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
* $/LicenseInfo$
*/
// Implementation for when reflection probes are disabled
uniform float reflection_probe_ambiance;
uniform samplerCube environmentMap;
uniform mat3 env_mat;
vec3 srgb_to_linear(vec3 c);
vec3 linear_to_srgb(vec3 c);
void sampleReflectionProbes(inout vec3 ambenv, inout vec3 glossenv,
vec2 tc, vec3 pos, vec3 norm, float glossiness, bool transparent, vec3 amblit_linear)
{
ambenv = mix(ambenv, vec3(reflection_probe_ambiance * 0.25), reflection_probe_ambiance);
vec3 refnormpersp = normalize(reflect(pos.xyz, norm.xyz));
vec3 env_vec = env_mat * refnormpersp;
glossenv = srgb_to_linear(texture(environmentMap, env_vec).rgb);
}
void sampleReflectionProbesWater(inout vec3 ambenv, inout vec3 glossenv,
vec2 tc, vec3 pos, vec3 norm, float glossiness, vec3 amblit_linear)
{
sampleReflectionProbes(ambenv, glossenv, tc, pos, norm, glossiness, false, amblit_linear);
}
vec4 sampleReflectionProbesDebug(vec3 pos)
{
// show nothing in debug display
return vec4(0, 0, 0, 0);
}
void sampleReflectionProbesLegacy(inout vec3 ambenv, inout vec3 glossenv, inout vec3 legacyenv,
vec2 tc, vec3 pos, vec3 norm, float glossiness, float envIntensity, bool transparent, vec3 amblit_linear)
{
ambenv = mix(ambenv, vec3(reflection_probe_ambiance * 0.25), reflection_probe_ambiance);
vec3 refnormpersp = normalize(reflect(pos.xyz, norm.xyz));
vec3 env_vec = env_mat * refnormpersp;
legacyenv = texture(environmentMap, env_vec).rgb;
glossenv = legacyenv;
}
void applyGlossEnv(inout vec3 color, vec3 glossenv, vec4 spec, vec3 pos, vec3 norm)
{
}
void applyLegacyEnv(inout vec3 color, vec3 legacyenv, vec4 spec, vec3 pos, vec3 norm, float envIntensity)
{
color = srgb_to_linear(mix(linear_to_srgb(color.rgb), legacyenv*2.0, envIntensity));
}
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