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.
68 lines
1.7 KiB
GLSL
68 lines
1.7 KiB
GLSL
// Copyright 2020 Google LLC
|
|
|
|
struct RayPayload
|
|
{
|
|
float3 color;
|
|
float distance;
|
|
float3 normal;
|
|
float reflector;
|
|
};
|
|
|
|
RaytracingAccelerationStructure topLevelAS : register(t0);
|
|
struct CameraProperties
|
|
{
|
|
float4x4 viewInverse;
|
|
float4x4 projInverse;
|
|
float4 lightPos;
|
|
};
|
|
cbuffer cam : register(b2) { CameraProperties cam; };
|
|
|
|
StructuredBuffer<float4> vertices : register(t3);
|
|
StructuredBuffer<uint> indices : register(t4);
|
|
|
|
struct Vertex
|
|
{
|
|
float3 pos;
|
|
float3 normal;
|
|
float3 color;
|
|
float2 uv;
|
|
float _pad0;
|
|
};
|
|
|
|
Vertex unpack(uint index)
|
|
{
|
|
float4 d0 = vertices[3 * index + 0];
|
|
float4 d1 = vertices[3 * index + 1];
|
|
float4 d2 = vertices[3 * index + 2];
|
|
|
|
Vertex v;
|
|
v.pos = d0.xyz;
|
|
v.normal = float3(d0.w, d1.x, d1.y);
|
|
v.color = float3(d1.z, d1.w, d2.x);
|
|
return v;
|
|
}
|
|
|
|
[shader("closesthit")]
|
|
void main(inout RayPayload rayPayload, in float3 attribs)
|
|
{
|
|
uint PrimitiveID = PrimitiveIndex();
|
|
int3 index = int3(indices[3 * PrimitiveID], indices[3 * PrimitiveID + 1], indices[3 * PrimitiveID + 2]);
|
|
|
|
Vertex v0 = unpack(index.x);
|
|
Vertex v1 = unpack(index.y);
|
|
Vertex v2 = unpack(index.z);
|
|
|
|
// Interpolate normal
|
|
const float3 barycentricCoords = float3(1.0f - attribs.x - attribs.y, attribs.x, attribs.y);
|
|
float3 normal = normalize(v0.normal * barycentricCoords.x + v1.normal * barycentricCoords.y + v2.normal * barycentricCoords.z);
|
|
|
|
// Basic lighting
|
|
float3 lightVector = normalize(cam.lightPos.xyz);
|
|
float dot_product = max(dot(lightVector, normal), 0.6);
|
|
rayPayload.color = v0.color * dot_product;
|
|
rayPayload.distance = RayTCurrent();
|
|
rayPayload.normal = normal;
|
|
|
|
// Objects with full white vertex color are treated as reflectors
|
|
rayPayload.reflector = ((v0.color.r == 1.0f) && (v0.color.g == 1.0f) && (v0.color.b == 1.0f)) ? 1.0f : 0.0f;
|
|
}
|