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/* Required by some nodes. */
#pragma BLENDER_REQUIRE(common_hair_lib.glsl)
#pragma BLENDER_REQUIRE(common_utiltex_lib.glsl)
#pragma BLENDER_REQUIRE(common_math_lib.glsl)
#pragma BLENDER_REQUIRE(common_math_geom_lib.glsl)
#pragma BLENDER_REQUIRE(closure_eval_surface_lib.glsl)
#pragma BLENDER_REQUIRE(surface_lib.glsl)
#pragma BLENDER_REQUIRE(volumetric_lib.glsl)
#pragma BLENDER_REQUIRE(renderpass_lib.glsl)
#ifdef USE_ALPHA_BLEND
/* Use dual source blending to be able to make a whole range of effects. */
layout(location = 0, index = 0) out vec4 outRadiance;
layout(location = 0, index = 1) out vec4 outTransmittance;
#else /* OPAQUE */
layout(location = 0) out vec4 outRadiance;
layout(location = 1) out vec2 ssrNormals;
layout(location = 2) out vec4 ssrData;
layout(location = 3) out vec3 sssIrradiance;
layout(location = 4) out float sssRadius;
layout(location = 5) out vec3 sssAlbedo;
#endif
uniform float backgroundAlpha;
#ifdef EEVEE_DISPLACEMENT_BUMP
# ifndef GPU_METAL
/* Prototype. */
vec3 displacement_exec();
# endif
/* Return new shading normal. */
vec3 displacement_bump()
{
vec2 dHd;
dF_branch(dot(displacement_exec(), g_data.N + dF_impl(g_data.N)), dHd);
vec3 dPdx = dFdx(g_data.P);
vec3 dPdy = dFdy(g_data.P);
/* Get surface tangents from normal. */
vec3 Rx = cross(dPdy, g_data.N);
vec3 Ry = cross(g_data.N, dPdx);
/* Compute surface gradient and determinant. */
float det = dot(dPdx, Rx);
vec3 surfgrad = dHd.x * Rx + dHd.y * Ry;
float facing = FrontFacing ? 1.0 : -1.0;
return normalize(abs(det) * g_data.N - facing * sign(det) * surfgrad);
}
#endif
void main()
{
g_data = init_globals();
#ifdef EEVEE_DISPLACEMENT_BUMP
g_data.N = displacement_bump();
#endif
#if defined(WORLD_BACKGROUND) || defined(PROBE_CAPTURE)
attrib_load();
#endif
out_ssr_color = vec3(0.0);
out_ssr_roughness = 0.0;
out_ssr_N = g_data.N;
out_sss_radiance = vec3(0.0);
out_sss_radius = 0.0;
out_sss_color = vec3(0.0);
Closure cl = nodetree_exec();
#ifdef WORLD_BACKGROUND
if (!renderPassEnvironment) {
cl.holdout += 1.0 - backgroundAlpha;
cl.radiance *= backgroundAlpha;
}
#endif
float holdout = saturate(1.0 - cl.holdout);
float transmit = saturate(avg(cl.transmittance));
float alpha = 1.0 - transmit;
#ifdef USE_ALPHA_BLEND
vec2 uvs = gl_FragCoord.xy * volCoordScale.zw;
vec3 vol_transmit, vol_scatter;
volumetric_resolve(uvs, gl_FragCoord.z, vol_transmit, vol_scatter);
/* Removes part of the volume scattering that have
* already been added to the destination pixels.
* Since we do that using the blending pipeline we need to account for material transmittance. */
vol_scatter -= vol_scatter * cl.transmittance;
cl.radiance = cl.radiance * holdout * vol_transmit + vol_scatter;
outRadiance = vec4(cl.radiance, alpha * holdout);
outTransmittance = vec4(cl.transmittance, transmit) * holdout;
#else
outRadiance = vec4(cl.radiance, holdout);
ssrNormals = normal_encode(normalize(mat3(ViewMatrix) * out_ssr_N), vec3(0.0));
ssrData = vec4(out_ssr_color, out_ssr_roughness);
sssIrradiance = out_sss_radiance;
sssRadius = out_sss_radius;
sssAlbedo = out_sss_color;
#endif
#ifdef USE_REFRACTION
/* SSRefraction pass is done after the SSS pass.
* In order to not lose the diffuse light totally we
* need to merge the SSS radiance to the main radiance. */
const bool use_refraction = true;
#else
const bool use_refraction = false;
#endif
/* For Probe capture */
if (!sssToggle || use_refraction) {
outRadiance.rgb += out_sss_radiance * out_sss_color;
}
#ifndef USE_ALPHA_BLEND
float alpha_div = safe_rcp(alpha);
outRadiance.rgb *= alpha_div;
ssrData.rgb *= alpha_div;
sssAlbedo.rgb *= alpha_div;
if (renderPassAOV) {
if (aov_is_valid) {
outRadiance = vec4(out_aov, 1.0);
}
else {
outRadiance = vec4(0.0);
}
}
#endif
#ifdef LOOKDEV
/* Lookdev spheres are rendered in front. */
gl_FragDepth = 0.0;
#endif
}
/* Only supported attrib for world/background shaders. */
vec3 attr_load_orco(vec4 orco)
{
/* Retain precision better than g_data.P (see T99128). */
return -normal_view_to_world(viewCameraVec(viewPosition));
}
/* Unsupported. */
vec4 attr_load_tangent(vec4 tangent)
{
return vec4(0);
}
vec4 attr_load_vec4(vec4 attr)
{
return vec4(0);
}
vec3 attr_load_vec3(vec3 attr)
{
return vec3(0);
}
vec2 attr_load_vec2(vec2 attr)
{
return vec2(0);
}
/* Passthrough. */
float attr_load_temperature_post(float attr)
{
return attr;
}
vec4 attr_load_color_post(vec4 attr)
{
return attr;
}
vec4 attr_load_uniform(vec4 attr, const uint attr_hash)
{
return attr;
}
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