112 lines
3.3 KiB
Text
112 lines
3.3 KiB
Text
/*
|
|
* Copyright (c) 2019-2021, 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) 2019-2021 NVIDIA CORPORATION
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#version 460
|
|
#extension GL_EXT_ray_tracing : require
|
|
#extension GL_GOOGLE_include_directive : enable
|
|
#extension GL_ARB_shader_clock : enable
|
|
|
|
|
|
#include "binding.glsl"
|
|
#include "raycommon.glsl"
|
|
#include "sampling.glsl"
|
|
|
|
layout(set = 0, binding = 0) uniform accelerationStructureEXT topLevelAS;
|
|
layout(set = 0, binding = 1, rgba32f) uniform image2D image;
|
|
|
|
layout(location = 0) rayPayloadEXT hitPayload prd;
|
|
|
|
layout(set = 1, binding = B_CAMERA) uniform CameraProperties
|
|
{
|
|
mat4 view;
|
|
mat4 proj;
|
|
mat4 viewInverse;
|
|
mat4 projInverse;
|
|
}
|
|
cam;
|
|
|
|
layout(push_constant) uniform Constants
|
|
{
|
|
vec4 clearColor;
|
|
vec3 lightPosition;
|
|
float lightIntensity;
|
|
int lightType;
|
|
int frame;
|
|
}
|
|
pushC;
|
|
|
|
void main()
|
|
{
|
|
// Initialize the random number
|
|
uint seed = tea(gl_LaunchIDEXT.y * gl_LaunchSizeEXT.x + gl_LaunchIDEXT.x, int(clockARB()));
|
|
|
|
const vec2 pixelCenter = vec2(gl_LaunchIDEXT.xy) + vec2(0.5);
|
|
const vec2 inUV = pixelCenter / vec2(gl_LaunchSizeEXT.xy);
|
|
vec2 d = inUV * 2.0 - 1.0;
|
|
|
|
vec4 origin = cam.viewInverse * vec4(0, 0, 0, 1);
|
|
vec4 target = cam.projInverse * vec4(d.x, d.y, 1, 1);
|
|
vec4 direction = cam.viewInverse * vec4(normalize(target.xyz), 0);
|
|
|
|
uint rayFlags = gl_RayFlagsOpaqueEXT;
|
|
float tMin = 0.001;
|
|
float tMax = 10000.0;
|
|
|
|
prd.hitValue = vec3(0);
|
|
prd.seed = seed;
|
|
prd.depth = 0;
|
|
prd.rayOrigin = origin.xyz;
|
|
prd.rayDirection = direction.xyz;
|
|
prd.weight = vec3(0);
|
|
|
|
vec3 curWeight = vec3(1);
|
|
vec3 hitValue = vec3(0);
|
|
|
|
for(; prd.depth < 10; prd.depth++)
|
|
{
|
|
traceRayEXT(topLevelAS, // acceleration structure
|
|
rayFlags, // rayFlags
|
|
0xFF, // cullMask
|
|
0, // sbtRecordOffset
|
|
0, // sbtRecordStride
|
|
0, // missIndex
|
|
prd.rayOrigin, // ray origin
|
|
tMin, // ray min range
|
|
prd.rayDirection, // ray direction
|
|
tMax, // ray max range
|
|
0 // payload (location = 0)
|
|
);
|
|
|
|
hitValue += prd.hitValue * curWeight;
|
|
curWeight *= prd.weight;
|
|
}
|
|
|
|
// Do accumulation over time
|
|
if(pushC.frame > 0)
|
|
{
|
|
float a = 1.0f / float(pushC.frame + 1);
|
|
vec3 old_color = imageLoad(image, ivec2(gl_LaunchIDEXT.xy)).xyz;
|
|
imageStore(image, ivec2(gl_LaunchIDEXT.xy), vec4(mix(old_color, hitValue, a), 1.f));
|
|
}
|
|
else
|
|
{
|
|
// First frame, replace the value in the buffer
|
|
imageStore(image, ivec2(gl_LaunchIDEXT.xy), vec4(hitValue, 1.f));
|
|
}
|
|
}
|