cce75f1859
These were written against the shaders at revision eddd724e7.
There have been changes made since then, which will need to be mirrored.
See `data/hlsl/README.md` for the current status of each sample.
64 lines
1.6 KiB
Text
64 lines
1.6 KiB
Text
// Copyright 2020 Google LLC
|
|
|
|
RaytracingAccelerationStructure rs : register(t0);
|
|
RWTexture2D<float4> image : register(u1);
|
|
|
|
struct CameraProperties
|
|
{
|
|
float4x4 viewInverse;
|
|
float4x4 projInverse;
|
|
float4 lightPos;
|
|
};
|
|
cbuffer cam : register(b2) { CameraProperties cam; };
|
|
|
|
|
|
struct RayPayload {
|
|
float3 color;
|
|
float distance;
|
|
float3 normal;
|
|
float reflector;
|
|
};
|
|
|
|
// Max. number of recursion is passed via a specialization constant
|
|
[[vk::constant_id(0)]] const int MAX_RECURSION = 0;
|
|
|
|
[shader("raygeneration")]
|
|
void main()
|
|
{
|
|
uint3 LaunchID = DispatchRaysIndex();
|
|
uint3 LaunchSize = DispatchRaysDimensions();
|
|
|
|
const float2 pixelCenter = float2(LaunchID.xy) + float2(0.5, 0.5);
|
|
const float2 inUV = pixelCenter/float2(LaunchSize.xy);
|
|
float2 d = inUV * 2.0 - 1.0;
|
|
float4 target = mul(cam.projInverse, float4(d.x, d.y, 1, 1));
|
|
|
|
RayDesc rayDesc;
|
|
rayDesc.Origin = mul(cam.viewInverse, float4(0,0,0,1)).xyz;
|
|
rayDesc.Direction = mul(cam.viewInverse, float4(normalize(target.xyz), 0)).xyz;
|
|
rayDesc.TMin = 0.001;
|
|
rayDesc.TMax = 10000.0;
|
|
|
|
float3 color = float3(0.0, 0.0, 0.0);
|
|
|
|
for (int i = 0; i < MAX_RECURSION; i++) {
|
|
RayPayload rayPayload;
|
|
TraceRay(rs, RAY_FLAG_FORCE_OPAQUE, 0xff, 0, 0, 0, rayDesc, rayPayload);
|
|
float3 hitColor = rayPayload.color;
|
|
|
|
if (rayPayload.distance < 0.0f) {
|
|
color += hitColor;
|
|
break;
|
|
} else if (rayPayload.reflector == 1.0f) {
|
|
const float3 hitPos = rayDesc.Origin + rayDesc.Direction * rayPayload.distance;
|
|
rayDesc.Origin = hitPos + rayPayload.normal * 0.001f;
|
|
rayDesc.Direction = reflect(rayDesc.Direction, rayPayload.normal);
|
|
} else {
|
|
color += hitColor;
|
|
break;
|
|
}
|
|
|
|
}
|
|
|
|
image[int2(LaunchID.xy)] = float4(color, 0.0);
|
|
}
|