render_raytrace.rmiss.glsl

/*
* Copyright (c) 2024-2025, NVIDIA CORPORATION.  All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* SPDX-FileCopyrightText: Copyright (c) 2024-2025, NVIDIA CORPORATION.
* SPDX-License-Identifier: Apache-2.0
*/

#version 460

#extension GL_GOOGLE_include_directive : enable

#extension GL_EXT_ray_tracing : require
#extension GL_EXT_shader_explicit_arithmetic_types_int8 : enable
#extension GL_EXT_shader_explicit_arithmetic_types_int32 : enable
#extension GL_EXT_shader_explicit_arithmetic_types_int16 : enable
#extension GL_EXT_shader_explicit_arithmetic_types_int64 : enable

#include "shaderio.h"
#include "nvshaders/sky_functions.h.slang"

//////////////////////////////////////////////////////////////

layout(scalar, binding = BINDINGS_FRAME_UBO, set = 0) uniform frameConstantsBuffer
{
  FrameConstants view;
};

//////////////////////////////////////////////////////////////

#if RAYTRACING_PAYLOAD_INDEX == 0
layout(location = RAYTRACING_PAYLOAD_INDEX) rayPayloadInEXT RayPayload rayHit;
#else
layout(location = RAYTRACING_PAYLOAD_INDEX) rayPayloadInEXT float rayHit;
#endif
//////////////////////////////////////////////////////////////

void main()
{
#if RAYTRACING_PAYLOAD_INDEX == 0
#if ALLOW_SHADING
  vec3 skyColor = evalSimpleSky(view.skyParams, gl_WorldRayDirectionEXT);
  rayHit.color = skyColor;
  rayHit.hitT  = 0;
  #if USE_DLSS
    rayHit.dlssAlbedo = vec4(skyColor,1);
    rayHit.dlssNormalRoughness = vec4(0);
    rayHit.dlssSpecular = vec3(0);
  #endif
#elif USE_DEPTH_ONLY
  rayHit.hitT  = 0;
#else
  rayHit.color = vec3(0);
  rayHit.hitT  = 0;
#endif
#else
  rayHit = 0;
#endif
}