blob: 4b449568016cbc2a35c3f7efcfebb883841ce5d4 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
// intersection.slang
//TEST:SIMPLE(filecheck=CHECK): -profile glsl_460+GL_NV_ray_tracing -stage intersection -entry main -target spirv-assembly
//TEST:SIMPLE(filecheck=CHECK): -emit-spirv-directly -stage intersection -entry main -target spirv-assembly
struct Sphere
{
float3 position;
float radius;
};
struct SphereHitAttributes
{
float3 normal;
};
bool rayIntersectsSphere(
RayDesc ray,
Sphere sphere,
out float tHit,
out SphereHitAttributes attrs)
{
// HACK: this is obviously incorrect,
// but we just need some code for testing
tHit = sphere.radius;
attrs.normal = sphere.position;
return tHit >= ray.TMin;
}
cbuffer U
{
Sphere gSphere;
}
void main()
{
RayDesc ray;
ray.Origin = ObjectRayOrigin();
ray.Direction = ObjectRayDirection();
ray.TMin = RayTMin();
ray.TMax = RayTCurrent();
float tHit;
SphereHitAttributes attrs;
if(rayIntersectsSphere(ray, gSphere, tHit, attrs))
{
ReportHit(tHit, 0, attrs);
}
}
// CHECK: OpEntryPoint IntersectionNV %main "main"
// CHECK: OpDecorate %[[rayTMin:[a-zA-Z0-9_]+]] BuiltIn RayTminNV
// CHECK-DAG: %[[ATTR:[A-Za-z0-9_]+]] = OpVariable %_ptr_HitAttributeNV_SphereHitAttributes{{.*}} HitAttributeNV
// CHECK-DAG: %[[VAL:[A-Za-z0-9_]+]] = Op{{.+}} %SphereHitAttributes{{.*}} {{.*}}
// CHECK-DAG: OpStore %[[ATTR]] %[[VAL]]
// CHECK-DAG: OpReportIntersectionKHR
|
