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Renaming to instanceCustomId

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This commit is contained in:
mklefrancois 2020-11-30 18:05:13 +01:00
parent 60b9191069
commit b1d17dbd2a
35 changed files with 167 additions and 157 deletions
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2
docs/vkrt_tuto_animation.md.htm
View file

@ -136,7 +136,7 @@ void HelloVulkan::createTopLevelAS()
{
nvvk::RaytracingBuilder::Instance rayInst;
rayInst.transform = m_objInstance[i].transform; // Position of the instance
rayInst.instanceId = i; // gl_InstanceID
rayInst.instanceCustomId = i; // gl_InstanceCustomIndexEXT
rayInst.blasId = m_objInstance[i].objIndex;
rayInst.hitGroupId = m_objInstance[i].hitgroup;
rayInst.flags = VK_GEOMETRY_INSTANCE_TRIANGLE_CULL_DISABLE_BIT_NV;

2
docs/vkrt_tuto_anyhit.md.htm
View file

@ -62,7 +62,7 @@ opaque, we simply return, which means that the hit will be accepted.
void main()
{
// Object of this instance
uint objId = scnDesc.i[gl_InstanceID].objId;
uint objId = scnDesc.i[gl_InstanceCustomIndexEXT].objId;
// Indices of the triangle
uint ind = indices[nonuniformEXT(objId)].i[3 * gl_PrimitiveID + 0];
// Vertex of the triangle

4
docs/vkrt_tuto_intersection.md.html
View file

@ -239,7 +239,7 @@ void HelloVulkan::createBottomLevelAS()
### TLAS
Similarly in `createTopLevelAS()`, the top level acceleration structure will need to add a reference to the BLAS of the spheres. We are setting the instanceID and blasID to the last element, which is why the sphere BLAS must be added after everything else.
Similarly in `createTopLevelAS()`, the top level acceleration structure will need to add a reference to the BLAS of the spheres. We are setting the instanceCustomId and blasId to the last element, which is why the sphere BLAS must be added after everything else.
The hitGroupId will be set to 1 instead of 0. We need to add a new hit group for the implicit primitives, since we will need to compute attributes like the normal, since they are not provide like with triangle primitives.
@ -250,7 +250,7 @@ Just before building the TLAS, we need to add the following
{
nvvk::RaytracingBuilder::Instance rayInst;
rayInst.transform = m_objInstance[0].transform; // Position of the instance
rayInst.instanceId = static_cast<uint32_t>(tlas.size()); // gl_InstanceID
rayInst.instanceCustomId = static_cast<uint32_t>(tlas.size()); // gl_InstanceCustomIndexEXT
rayInst.blasId = static_cast<uint32_t>(m_objModel.size());
rayInst.hitGroupId = 1; // We will use the same hit group for all objects
rayInst.flags = vk::GeometryInstanceFlagBitsKHR::eTriangleCullDisable;

4
docs/vkrt_tuto_manyhits.md.htm
View file

@ -284,7 +284,9 @@ std::array<Stride, 4> strideAddresses{
# Extending Hit
The SBT can be larger than the number of shading models, which could then be used to have one shader per instance with its own data. For some applications, instead of retrieving the material information as in the main tutorial using a storage buffer and indexing into it using the `gl_InstanceID`, it is possible to set all of the material information in the SBT.
The SBT can be larger than the number of shading models, which could then be used to have one shader per instance with its own data.
For some applications, instead of retrieving the material information as in the main tutorial using a storage buffer and indexing
into it using the `gl_InstanceCustomIndexEXT`, it is possible to set all of the material information in the SBT.
The following modification will add another entry to the SBT with a different color per instance. The new SBT hit group (2) will use the same CHIT handle (4) as hit group 1.

19
docs/vkrt_tutorial.md.htm
View file

@ -650,6 +650,12 @@ and the index of its corresponding BLAS (`blasId`) in the vector passed to `buil
be available during shading as `gl_InstanceCustomIndex`, as well as the index of the hit group that represents the shaders that will be
invoked upon hitting the object (`VkAccelerationStructureInstanceKHR::instanceShaderBindingTableRecordOffset`, a.k.a. `hitGroupId` in the helper).
!!! Note gl_InstanceId
We could have ignored to use the custom index, since the Id will be equivalent to
gl_InstanceId. As gl_InstanceId specifies the index of the instance that intersects the
current ray, which is in this case the same value as **i**. In later examples the
value will be different.
This index and the notion of hit group are tied to the definition of the ray tracing pipeline and the Shader Binding
Table, described later in this tutorial and used to select determine which shaders are invoked at runtime. For now
it suffices to say that we will use only one hit group for the whole scene, and hence the hit group index is always 0.
@ -669,7 +675,7 @@ void HelloVulkan::createTopLevelAS()
{
nvvk::RaytracingBuilderKHR::Instance rayInst;
rayInst.transform = m_objInstance[i].transform; // Position of the instance
rayInst.instanceId = i; // gl_InstanceID
rayInst.instanceCustomId = i; // gl_InstanceCustomIndexEXT
rayInst.blasId = m_objInstance[i].objIndex;
rayInst.hitGroupId = 0; // We will use the same hit group for all objects
rayInst.flags = VK_GEOMETRY_INSTANCE_TRIANGLE_FACING_CULL_DISABLE_BIT_KHR;
@ -679,6 +685,7 @@ void HelloVulkan::createTopLevelAS()
}
````
As usual in Vulkan, we need to explicitly destroy the objects we created by adding a call at the end of
`HelloVulkan::destroyResources`:
@ -753,7 +760,7 @@ For convenience, the implementation of `instanceToVkGeometryInstanceKHR` is copi
// the matrix is row-major, we simply copy the first 12 values of the
// original 4x4 matrix
memcpy(&gInst.transform, &transp, sizeof(gInst.transform));
gInst.instanceCustomIndex = instance.instanceId;
gInst.instanceCustomIndex = instance.instanceCustomId;
gInst.mask = instance.mask;
gInst.instanceShaderBindingTableRecordOffset = instance.hitGroupId;
gInst.flags = instance.flags;
@ -1889,7 +1896,7 @@ In the `main` function, the `gl_PrimitiveID` allows us to find the vertices of t
void main()
{
// Object of this instance
uint objId = scnDesc.i[gl_InstanceID].objId;
uint objId = scnDesc.i[gl_InstanceCustomIndexEXT].objId;
// Indices of the triangle
ivec3 ind = ivec3(indices[nonuniformEXT(objId)].i[3 * gl_PrimitiveID + 0], //
@ -1909,7 +1916,7 @@ Using the hit point's barycentric coordinates, we can interpolate the normal:
// Computing the normal at hit position
vec3 normal = v0.nrm * barycentrics.x + v1.nrm * barycentrics.y + v2.nrm * barycentrics.z;
// Transforming the normal to world space
normal = normalize(vec3(scnDesc.i[gl_InstanceID].transfoIT * vec4(normal, 0.0)));
normal = normalize(vec3(scnDesc.i[gl_InstanceCustomIndexEXT].transfoIT * vec4(normal, 0.0)));
````
The world-space position could be calculated in two ways, the first one being to use the information from the hit
@ -1925,7 +1932,7 @@ Another solution, more precise, consists in computing the position by interpolat
// Computing the coordinates of the hit position
vec3 worldPos = v0.pos * barycentrics.x + v1.pos * barycentrics.y + v2.pos * barycentrics.z;
// Transforming the position to world space
worldPos = vec3(scnDesc.i[gl_InstanceID].transfo * vec4(worldPos, 1.0));
worldPos = vec3(scnDesc.i[gl_InstanceCustomIndexEXT].transfo * vec4(worldPos, 1.0));
````
The light source specified in the constants can then be used to compute the dot product of the normal with the lighting
@ -2007,7 +2014,7 @@ supports textures to modulate the surface albedo.
vec3 diffuse = computeDiffuse(mat, L, normal);
if(mat.textureId >= 0)
{
uint txtId = mat.textureId + scnDesc.i[gl_InstanceID].txtOffset;
uint txtId = mat.textureId + scnDesc.i[gl_InstanceCustomIndexEXT].txtOffset;
vec2 texCoord =
v0.texCoord * barycentrics.x + v1.texCoord * barycentrics.y + v2.texCoord * barycentrics.z;
diffuse *= texture(textureSamplers[nonuniformEXT(txtId)], texCoord).xyz;

5
ray_tracing__advance/raytrace.cpp
View file

@ -172,7 +172,7 @@ void Raytracer::createTopLevelAS(std::vector<ObjInstance>& instances, ImplInst&
{
nvvk::RaytracingBuilderKHR::Instance rayInst;
rayInst.transform = instances[i].transform; // Position of the instance
rayInst.instanceId = i; // gl_InstanceID
rayInst.instanceCustomId = i; // gl_InstanceCustomIndexEXT
rayInst.blasId = instances[i].objIndex;
rayInst.hitGroupId = 0; // We will use the same hit group for all objects
rayInst.flags = VK_GEOMETRY_INSTANCE_TRIANGLE_FACING_CULL_DISABLE_BIT_KHR;
@ -184,7 +184,8 @@ void Raytracer::createTopLevelAS(std::vector<ObjInstance>& instances, ImplInst&
{
nvvk::RaytracingBuilderKHR::Instance rayInst;
rayInst.transform = implicitObj.transform; // Position of the instance
rayInst.instanceId = static_cast<uint32_t>(implicitObj.blasId); // Same for material index
rayInst.instanceCustomId =
static_cast<uint32_t>(implicitObj.blasId); // Same for material index
rayInst.blasId = static_cast<uint32_t>(implicitObj.blasId);
rayInst.hitGroupId = 1; // We will use the same hit group for all objects (the second one)
rayInst.flags = VK_GEOMETRY_INSTANCE_TRIANGLE_FACING_CULL_DISABLE_BIT_KHR;

2
ray_tracing__advance/shaders/raytrace.rahit
View file

@ -19,7 +19,7 @@ layout(binding = 1, set = 1, scalar) buffer MatColorBufferObject { WaveFrontMate
void main()
{
// Object of this instance
uint objId = scnDesc.i[gl_InstanceID].objId;
uint objId = scnDesc.i[gl_InstanceCustomIndexEXT].objId;
// Material of the object
int matIdx = matIndex[nonuniformEXT(objId)].i[gl_PrimitiveID];

8
ray_tracing__advance/shaders/raytrace.rchit
View file

@ -42,7 +42,7 @@ layout(location = 3) callableDataEXT rayLight cLight;
void main()
{
// Object of this instance
uint objId = scnDesc.i[gl_InstanceID].objId;
uint objId = scnDesc.i[gl_InstanceCustomIndexEXT].objId;
// Indices of the triangle
ivec3 ind = ivec3(indices[nonuniformEXT(objId)].i[3 * gl_PrimitiveID + 0], //
@ -58,13 +58,13 @@ void main()
// Computing the normal at hit position
vec3 normal = v0.nrm * barycentrics.x + v1.nrm * barycentrics.y + v2.nrm * barycentrics.z;
// Transforming the normal to world space
normal = normalize(vec3(scnDesc.i[gl_InstanceID].transfoIT * vec4(normal, 0.0)));
normal = normalize(vec3(scnDesc.i[gl_InstanceCustomIndexEXT].transfoIT * vec4(normal, 0.0)));
// Computing the coordinates of the hit position
vec3 worldPos = v0.pos * barycentrics.x + v1.pos * barycentrics.y + v2.pos * barycentrics.z;
// Transforming the position to world space
worldPos = vec3(scnDesc.i[gl_InstanceID].transfo * vec4(worldPos, 1.0));
worldPos = vec3(scnDesc.i[gl_InstanceCustomIndexEXT].transfo * vec4(worldPos, 1.0));
cLight.inHitPosition = worldPos;
//#define DONT_USE_CALLABLE
@ -109,7 +109,7 @@ void main()
vec3 diffuse = computeDiffuse(mat, cLight.outLightDir, normal);
if(mat.textureId >= 0)
{
uint txtId = mat.textureId + scnDesc.i[gl_InstanceID].txtOffset;
uint txtId = mat.textureId + scnDesc.i[gl_InstanceCustomIndexEXT].txtOffset;
vec2 texCoord =
v0.texCoord * barycentrics.x + v1.texCoord * barycentrics.y + v2.texCoord * barycentrics.z;
diffuse *= texture(textureSamplers[nonuniformEXT(txtId)], texCoord).xyz;

2
ray_tracing__simple/hello_vulkan.cpp
View file

@ -707,7 +707,7 @@ void HelloVulkan::createTopLevelAS()
{
nvvk::RaytracingBuilderKHR::Instance rayInst;
rayInst.transform = m_objInstance[i].transform; // Position of the instance
rayInst.instanceId = i; // gl_InstanceID
rayInst.instanceCustomId = i; // gl_InstanceCustomIndexEXT
rayInst.blasId = m_objInstance[i].objIndex;
rayInst.hitGroupId = 0; // We will use the same hit group for all objects
rayInst.flags = VK_GEOMETRY_INSTANCE_TRIANGLE_FACING_CULL_DISABLE_BIT_KHR;

8
ray_tracing__simple/shaders/raytrace.rchit
View file

@ -35,7 +35,7 @@ pushC;
void main()
{
// Object of this instance
uint objId = scnDesc.i[gl_InstanceID].objId;
uint objId = scnDesc.i[gl_InstanceCustomIndexEXT].objId;
// Indices of the triangle
ivec3 ind = ivec3(indices[nonuniformEXT(objId)].i[3 * gl_PrimitiveID + 0], //
@ -51,13 +51,13 @@ void main()
// Computing the normal at hit position
vec3 normal = v0.nrm * barycentrics.x + v1.nrm * barycentrics.y + v2.nrm * barycentrics.z;
// Transforming the normal to world space
normal = normalize(vec3(scnDesc.i[gl_InstanceID].transfoIT * vec4(normal, 0.0)));
normal = normalize(vec3(scnDesc.i[gl_InstanceCustomIndexEXT].transfoIT * vec4(normal, 0.0)));
// Computing the coordinates of the hit position
vec3 worldPos = v0.pos * barycentrics.x + v1.pos * barycentrics.y + v2.pos * barycentrics.z;
// Transforming the position to world space
worldPos = vec3(scnDesc.i[gl_InstanceID].transfo * vec4(worldPos, 1.0));
worldPos = vec3(scnDesc.i[gl_InstanceCustomIndexEXT].transfo * vec4(worldPos, 1.0));
// Vector toward the light
vec3 L;
@ -85,7 +85,7 @@ void main()
vec3 diffuse = computeDiffuse(mat, L, normal);
if(mat.textureId >= 0)
{
uint txtId = mat.textureId + scnDesc.i[gl_InstanceID].txtOffset;
uint txtId = mat.textureId + scnDesc.i[gl_InstanceCustomIndexEXT].txtOffset;
vec2 texCoord =
v0.texCoord * barycentrics.x + v1.texCoord * barycentrics.y + v2.texCoord * barycentrics.z;
diffuse *= texture(textureSamplers[nonuniformEXT(txtId)], texCoord).xyz;

2
ray_tracing_animation/README.md
View file

@ -126,7 +126,7 @@ void HelloVulkan::createTopLevelAS()
{
nvvk::RaytracingBuilder::Instance rayInst;
rayInst.transform = m_objInstance[i].transform; // Position of the instance
rayInst.instanceId = i; // gl_InstanceID
rayInst.instanceCustomId = i; // gl_InstanceCustomIndexEXT
rayInst.blasId = m_objInstance[i].objIndex;
rayInst.hitGroupId = m_objInstance[i].hitgroup;
rayInst.flags = VK_GEOMETRY_INSTANCE_TRIANGLE_CULL_DISABLE_BIT_NV;

2
ray_tracing_animation/hello_vulkan.cpp
View file

@ -699,7 +699,7 @@ void HelloVulkan::createTopLevelAS()
{
nvvk::RaytracingBuilderKHR::Instance rayInst;
rayInst.transform = m_objInstance[i].transform; // Position of the instance
rayInst.instanceId = i; // gl_InstanceID
rayInst.instanceCustomId = i; // gl_InstanceCustomIndexEXT
rayInst.blasId = m_objInstance[i].objIndex;
rayInst.hitGroupId = 0;
rayInst.flags = VK_GEOMETRY_INSTANCE_TRIANGLE_FACING_CULL_DISABLE_BIT_KHR;

8
ray_tracing_animation/shaders/raytrace.rchit
View file

@ -37,7 +37,7 @@ pushC;
void main()
{
// Object of this instance
uint objId = scnDesc.i[gl_InstanceID].objId;
uint objId = scnDesc.i[gl_InstanceCustomIndexEXT].objId;
// Indices of the triangle
ivec3 ind = ivec3(indices[nonuniformEXT(objId)].i[3 * gl_PrimitiveID + 0], //
@ -53,13 +53,13 @@ void main()
// Computing the normal at hit position
vec3 normal = v0.nrm * barycentrics.x + v1.nrm * barycentrics.y + v2.nrm * barycentrics.z;
// Transforming the normal to world space
normal = normalize(vec3(scnDesc.i[gl_InstanceID].transfoIT * vec4(normal, 0.0)));
normal = normalize(vec3(scnDesc.i[gl_InstanceCustomIndexEXT].transfoIT * vec4(normal, 0.0)));
// Computing the coordinates of the hit position
vec3 worldPos = v0.pos * barycentrics.x + v1.pos * barycentrics.y + v2.pos * barycentrics.z;
// Transforming the position to world space
worldPos = vec3(scnDesc.i[gl_InstanceID].transfo * vec4(worldPos, 1.0));
worldPos = vec3(scnDesc.i[gl_InstanceCustomIndexEXT].transfo * vec4(worldPos, 1.0));
// Vector toward the light
vec3 L;
@ -87,7 +87,7 @@ void main()
vec3 diffuse = computeDiffuse(mat, L, normal);
if(mat.textureId >= 0)
{
uint txtId = mat.textureId + scnDesc.i[gl_InstanceID].txtOffset;
uint txtId = mat.textureId + scnDesc.i[gl_InstanceCustomIndexEXT].txtOffset;
vec2 texCoord =
v0.texCoord * barycentrics.x + v1.texCoord * barycentrics.y + v2.texCoord * barycentrics.z;
diffuse *= texture(textureSamplers[nonuniformEXT(txtId)], texCoord).xyz;

2
ray_tracing_anyhit/README.md
View file

@ -60,7 +60,7 @@ opaque, we simply return, which means that the hit will be accepted.
void main()
{
// Object of this instance
uint objId = scnDesc.i[gl_InstanceID].objId;
uint objId = scnDesc.i[gl_InstanceCustomIndexEXT].objId;
// Indices of the triangle
uint ind = indices[nonuniformEXT(objId)].i[3 * gl_PrimitiveID + 0];
// Vertex of the triangle

2
ray_tracing_anyhit/hello_vulkan.cpp
View file

@ -697,7 +697,7 @@ void HelloVulkan::createTopLevelAS()
{
nvvk::RaytracingBuilderKHR::Instance rayInst;
rayInst.transform = m_objInstance[i].transform; // Position of the instance
rayInst.instanceId = i; // gl_InstanceID
rayInst.instanceCustomId = i; // gl_InstanceCustomIndexEXT
rayInst.blasId = m_objInstance[i].objIndex;
rayInst.hitGroupId = 0; // We will use the same hit group for all objects
rayInst.flags = VK_GEOMETRY_INSTANCE_TRIANGLE_FACING_CULL_DISABLE_BIT_KHR;

2
ray_tracing_anyhit/shaders/raytrace.rahit
View file

@ -21,7 +21,7 @@ layout(binding = 1, set = 1, scalar) buffer MatColorBufferObject { WaveFrontMate
void main()
{
// Object of this instance
uint objId = scnDesc.i[gl_InstanceID].objId;
uint objId = scnDesc.i[gl_InstanceCustomIndexEXT].objId;
// Indices of the triangle
uint ind = indices[nonuniformEXT(objId)].i[3 * gl_PrimitiveID + 0];
// Vertex of the triangle

8
ray_tracing_anyhit/shaders/raytrace.rchit
View file

@ -37,7 +37,7 @@ pushC;
void main()
{
// Object of this instance
uint objId = scnDesc.i[gl_InstanceID].objId;
uint objId = scnDesc.i[gl_InstanceCustomIndexEXT].objId;
// Indices of the triangle
ivec3 ind = ivec3(indices[nonuniformEXT(objId)].i[3 * gl_PrimitiveID + 0], //
@ -53,13 +53,13 @@ void main()
// Computing the normal at hit position
vec3 normal = v0.nrm * barycentrics.x + v1.nrm * barycentrics.y + v2.nrm * barycentrics.z;
// Transforming the normal to world space
normal = normalize(vec3(scnDesc.i[gl_InstanceID].transfoIT * vec4(normal, 0.0)));
normal = normalize(vec3(scnDesc.i[gl_InstanceCustomIndexEXT].transfoIT * vec4(normal, 0.0)));
// Computing the coordinates of the hit position
vec3 worldPos = v0.pos * barycentrics.x + v1.pos * barycentrics.y + v2.pos * barycentrics.z;
// Transforming the position to world space
worldPos = vec3(scnDesc.i[gl_InstanceID].transfo * vec4(worldPos, 1.0));
worldPos = vec3(scnDesc.i[gl_InstanceCustomIndexEXT].transfo * vec4(worldPos, 1.0));
// Vector toward the light
vec3 L;
@ -87,7 +87,7 @@ void main()
vec3 diffuse = computeDiffuse(mat, L, normal);
if(mat.textureId >= 0)
{
uint txtId = mat.textureId + scnDesc.i[gl_InstanceID].txtOffset;
uint txtId = mat.textureId + scnDesc.i[gl_InstanceCustomIndexEXT].txtOffset;
vec2 texCoord =
v0.texCoord * barycentrics.x + v1.texCoord * barycentrics.y + v2.texCoord * barycentrics.z;
diffuse *= texture(textureSamplers[nonuniformEXT(txtId)], texCoord).xyz;

2
ray_tracing_anyhit/shaders/raytrace_rahit.glsl
View file

@ -25,7 +25,7 @@ layout(binding = 1, set = 1, scalar) buffer MatColorBufferObject { WaveFrontMate
void main()
{
// Object of this instance
uint objId = scnDesc.i[gl_InstanceID].objId;
uint objId = scnDesc.i[gl_InstanceCustomIndexEXT].objId;
// Indices of the triangle
uint ind = indices[nonuniformEXT(objId)].i[3 * gl_PrimitiveID + 0];
// Vertex of the triangle

2
ray_tracing_callable/hello_vulkan.cpp
View file

@ -696,7 +696,7 @@ void HelloVulkan::createTopLevelAS()
{
nvvk::RaytracingBuilderKHR::Instance rayInst;
rayInst.transform = m_objInstance[i].transform; // Position of the instance
rayInst.instanceId = i; // gl_InstanceID
rayInst.instanceCustomId = i; // gl_InstanceCustomIndexEXT
rayInst.blasId = m_objInstance[i].objIndex;
rayInst.hitGroupId = 0; // We will use the same hit group for all objects
rayInst.flags = VK_GEOMETRY_INSTANCE_TRIANGLE_FACING_CULL_DISABLE_BIT_KHR;

8
ray_tracing_callable/shaders/raytrace.rchit
View file

@ -42,7 +42,7 @@ layout(location = 0) callableDataEXT rayLight cLight;
void main()
{
// Object of this instance
uint objId = scnDesc.i[gl_InstanceID].objId;
uint objId = scnDesc.i[gl_InstanceCustomIndexEXT].objId;
// Indices of the triangle
ivec3 ind = ivec3(indices[nonuniformEXT(objId)].i[3 * gl_PrimitiveID + 0], //
@ -58,13 +58,13 @@ void main()
// Computing the normal at hit position
vec3 normal = v0.nrm * barycentrics.x + v1.nrm * barycentrics.y + v2.nrm * barycentrics.z;
// Transforming the normal to world space
normal = normalize(vec3(scnDesc.i[gl_InstanceID].transfoIT * vec4(normal, 0.0)));
normal = normalize(vec3(scnDesc.i[gl_InstanceCustomIndexEXT].transfoIT * vec4(normal, 0.0)));
// Computing the coordinates of the hit position
vec3 worldPos = v0.pos * barycentrics.x + v1.pos * barycentrics.y + v2.pos * barycentrics.z;
// Transforming the position to world space
worldPos = vec3(scnDesc.i[gl_InstanceID].transfo * vec4(worldPos, 1.0));
worldPos = vec3(scnDesc.i[gl_InstanceCustomIndexEXT].transfo * vec4(worldPos, 1.0));
cLight.inHitPosition = worldPos;
//#define DONT_USE_CALLABLE
@ -109,7 +109,7 @@ void main()
vec3 diffuse = computeDiffuse(mat, cLight.outLightDir, normal);
if(mat.textureId >= 0)
{
uint txtId = mat.textureId + scnDesc.i[gl_InstanceID].txtOffset;
uint txtId = mat.textureId + scnDesc.i[gl_InstanceCustomIndexEXT].txtOffset;
vec2 texCoord =
v0.texCoord * barycentrics.x + v1.texCoord * barycentrics.y + v2.texCoord * barycentrics.z;
diffuse *= texture(textureSamplers[nonuniformEXT(txtId)], texCoord).xyz;

4
ray_tracing_gltf/README.md
View file

@ -182,7 +182,7 @@ nvvk::RaytracingBuilderKHR::Blas HelloVulkan::primitiveToGeometry(const nvh::Glt
There are almost no changes for creating the TLAS but is actually even simpler. Each
drawable node has a matrix and an index to the geometry, which in our case, also
correspond directly to the BLAS ID. To know which geometry is used, and to find back
all the data (see structure `RtPrimitiveLookup`), we will set the `instanceId` member
all the data (see structure `RtPrimitiveLookup`), we will set the `instanceCustomId` member
to the primitive mesh id. This value will be recovered with `gl_InstanceCustomIndexEXT`
in the closest hit shader.
@ -191,7 +191,7 @@ in the closest hit shader.
{
nvvk::RaytracingBuilderKHR::Instance rayInst;
rayInst.transform = node.worldMatrix;
rayInst.instanceId = node.primMesh; // gl_InstanceCustomIndexEXT: to find which primitive
rayInst.instanceCustomId = node.primMesh; // gl_InstanceCustomIndexEXT: to find which primitive
rayInst.blasId = node.primMesh;
rayInst.flags = VK_GEOMETRY_INSTANCE_TRIANGLE_FACING_CULL_DISABLE_BIT_KHR;
rayInst.hitGroupId = 0; // We will use the same hit group for all objects

2
ray_tracing_gltf/hello_vulkan.cpp
View file

@ -671,7 +671,7 @@ void HelloVulkan::createTopLevelAS()
{
nvvk::RaytracingBuilderKHR::Instance rayInst;
rayInst.transform = node.worldMatrix;
rayInst.instanceId = node.primMesh; // gl_InstanceCustomIndexEXT: to find which primitive
rayInst.instanceCustomId = node.primMesh; // gl_InstanceCustomIndexEXT: to find which primitive
rayInst.blasId = node.primMesh;
rayInst.flags = VK_GEOMETRY_INSTANCE_TRIANGLE_FACING_CULL_DISABLE_BIT_KHR;
rayInst.hitGroupId = 0; // We will use the same hit group for all objects

2
ray_tracing_instances/hello_vulkan.cpp
View file

@ -716,7 +716,7 @@ void HelloVulkan::createTopLevelAS()
{
nvvk::RaytracingBuilderKHR::Instance rayInst;
rayInst.transform = m_objInstance[i].transform; // Position of the instance
rayInst.instanceId = i; // gl_InstanceID
rayInst.instanceCustomId = i; // gl_InstanceCustomIndexEXT
rayInst.blasId = m_objInstance[i].objIndex;
rayInst.hitGroupId = 0; // We will use the same hit group for all objects
rayInst.flags = VK_GEOMETRY_INSTANCE_TRIANGLE_FACING_CULL_DISABLE_BIT_KHR;

8
ray_tracing_instances/shaders/raytrace.rchit
View file

@ -37,7 +37,7 @@ pushC;
void main()
{
// Object of this instance
uint objId = scnDesc.i[gl_InstanceID].objId;
uint objId = scnDesc.i[gl_InstanceCustomIndexEXT].objId;
// Indices of the triangle
ivec3 ind = ivec3(indices[nonuniformEXT(objId)].i[3 * gl_PrimitiveID + 0], //
@ -53,13 +53,13 @@ void main()
// Computing the normal at hit position
vec3 normal = v0.nrm * barycentrics.x + v1.nrm * barycentrics.y + v2.nrm * barycentrics.z;
// Transforming the normal to world space
normal = normalize(vec3(scnDesc.i[gl_InstanceID].transfoIT * vec4(normal, 0.0)));
normal = normalize(vec3(scnDesc.i[gl_InstanceCustomIndexEXT].transfoIT * vec4(normal, 0.0)));
// Computing the coordinates of the hit position
vec3 worldPos = v0.pos * barycentrics.x + v1.pos * barycentrics.y + v2.pos * barycentrics.z;
// Transforming the position to world space
worldPos = vec3(scnDesc.i[gl_InstanceID].transfo * vec4(worldPos, 1.0));
worldPos = vec3(scnDesc.i[gl_InstanceCustomIndexEXT].transfo * vec4(worldPos, 1.0));
// Vector toward the light
vec3 L;
@ -87,7 +87,7 @@ void main()
vec3 diffuse = computeDiffuse(mat, L, normal);
if(mat.textureId >= 0)
{
uint txtId = mat.textureId + scnDesc.i[gl_InstanceID].txtOffset;
uint txtId = mat.textureId + scnDesc.i[gl_InstanceCustomIndexEXT].txtOffset;
vec2 texCoord =
v0.texCoord * barycentrics.x + v1.texCoord * barycentrics.y + v2.texCoord * barycentrics.z;
diffuse *= texture(textureSamplers[nonuniformEXT(txtId)], texCoord).xyz;

4
ray_tracing_intersection/README.md
View file

@ -234,7 +234,7 @@ void HelloVulkan::createBottomLevelAS()
### TLAS
Similarly in `createTopLevelAS()`, the top level acceleration structure will need to add a reference to the BLAS of the spheres. We are setting the instanceID and blasID to the last element, which is why the sphere BLAS must be added after everything else.
Similarly in `createTopLevelAS()`, the top level acceleration structure will need to add a reference to the BLAS of the spheres. We are setting the instanceCustomId and blasId to the last element, which is why the sphere BLAS must be added after everything else.
The hitGroupId will be set to 1 instead of 0. We need to add a new hit group for the implicit primitives, since we will need to compute attributes like the normal, since they are not provide like with triangle primitives.
@ -245,7 +245,7 @@ Just before building the TLAS, we need to add the following
{
nvvk::RaytracingBuilder::Instance rayInst;
rayInst.transform = m_objInstance[0].transform; // Position of the instance
rayInst.instanceId = static_cast<uint32_t>(tlas.size()); // gl_InstanceID
rayInst.instanceCustomId = static_cast<uint32_t>(tlas.size()); // gl_InstanceCustomIndexEXT
rayInst.blasId = static_cast<uint32_t>(m_objModel.size());
rayInst.hitGroupId = 1; // We will use the same hit group for all objects
rayInst.flags = VK_GEOMETRY_INSTANCE_TRIANGLE_FACING_CULL_DISABLE_BIT_KHR;

4
ray_tracing_intersection/hello_vulkan.cpp
View file

@ -812,7 +812,7 @@ void HelloVulkan::createTopLevelAS()
{
nvvk::RaytracingBuilderKHR::Instance rayInst;
rayInst.transform = m_objInstance[i].transform; // Position of the instance
rayInst.instanceId = i; // gl_InstanceID
rayInst.instanceCustomId = i; // gl_InstanceCustomIndexEXT
rayInst.blasId = m_objInstance[i].objIndex;
rayInst.hitGroupId = 0; // We will use the same hit group for all objects
rayInst.flags = VK_GEOMETRY_INSTANCE_TRIANGLE_FACING_CULL_DISABLE_BIT_KHR;
@ -823,7 +823,7 @@ void HelloVulkan::createTopLevelAS()
{
nvvk::RaytracingBuilderKHR::Instance rayInst;
rayInst.transform = m_objInstance[0].transform; // Position of the instance
rayInst.instanceId = static_cast<uint32_t>(tlas.size()); // gl_InstanceID
rayInst.instanceCustomId = static_cast<uint32_t>(tlas.size()); // gl_InstanceCustomIndexEXT
rayInst.blasId = static_cast<uint32_t>(m_objModel.size());
rayInst.hitGroupId = 1; // We will use the same hit group for all objects
rayInst.flags = VK_GEOMETRY_INSTANCE_TRIANGLE_FACING_CULL_DISABLE_BIT_KHR;

8
ray_tracing_intersection/shaders/raytrace.rchit
View file

@ -37,7 +37,7 @@ pushC;
void main()
{
// Object of this instance
uint objId = scnDesc.i[gl_InstanceID].objId;
uint objId = scnDesc.i[gl_InstanceCustomIndexEXT].objId;
// Indices of the triangle
ivec3 ind = ivec3(indices[nonuniformEXT(objId)].i[3 * gl_PrimitiveID + 0], //
@ -53,13 +53,13 @@ void main()
// Computing the normal at hit position
vec3 normal = v0.nrm * barycentrics.x + v1.nrm * barycentrics.y + v2.nrm * barycentrics.z;
// Transforming the normal to world space
normal = normalize(vec3(scnDesc.i[gl_InstanceID].transfoIT * vec4(normal, 0.0)));
normal = normalize(vec3(scnDesc.i[gl_InstanceCustomIndexEXT].transfoIT * vec4(normal, 0.0)));
// Computing the coordinates of the hit position
vec3 worldPos = v0.pos * barycentrics.x + v1.pos * barycentrics.y + v2.pos * barycentrics.z;
// Transforming the position to world space
worldPos = vec3(scnDesc.i[gl_InstanceID].transfo * vec4(worldPos, 1.0));
worldPos = vec3(scnDesc.i[gl_InstanceCustomIndexEXT].transfo * vec4(worldPos, 1.0));
// Vector toward the light
vec3 L;
@ -87,7 +87,7 @@ void main()
vec3 diffuse = computeDiffuse(mat, L, normal);
if(mat.textureId >= 0)
{
uint txtId = mat.textureId + scnDesc.i[gl_InstanceID].txtOffset;
uint txtId = mat.textureId + scnDesc.i[gl_InstanceCustomIndexEXT].txtOffset;
vec2 texCoord =
v0.texCoord * barycentrics.x + v1.texCoord * barycentrics.y + v2.texCoord * barycentrics.z;
diffuse *= texture(textureSamplers[nonuniformEXT(txtId)], texCoord).xyz;

2
ray_tracing_jitter_cam/hello_vulkan.cpp
View file

@ -695,7 +695,7 @@ void HelloVulkan::createTopLevelAS()
{
nvvk::RaytracingBuilderKHR::Instance rayInst;
rayInst.transform = m_objInstance[i].transform; // Position of the instance
rayInst.instanceId = i; // gl_InstanceID
rayInst.instanceCustomId = i; // gl_InstanceCustomIndexEXT
rayInst.blasId = m_objInstance[i].objIndex;
rayInst.hitGroupId = 0; // We will use the same hit group for all objects
rayInst.flags = VK_GEOMETRY_INSTANCE_TRIANGLE_FACING_CULL_DISABLE_BIT_KHR;

8
ray_tracing_jitter_cam/shaders/raytrace.rchit
View file

@ -37,7 +37,7 @@ pushC;
void main()
{
// Object of this instance
uint objId = scnDesc.i[gl_InstanceID].objId;
uint objId = scnDesc.i[gl_InstanceCustomIndexEXT].objId;
// Indices of the triangle
ivec3 ind = ivec3(indices[nonuniformEXT(objId)].i[3 * gl_PrimitiveID + 0], //
@ -53,13 +53,13 @@ void main()
// Computing the normal at hit position
vec3 normal = v0.nrm * barycentrics.x + v1.nrm * barycentrics.y + v2.nrm * barycentrics.z;
// Transforming the normal to world space
normal = normalize(vec3(scnDesc.i[gl_InstanceID].transfoIT * vec4(normal, 0.0)));
normal = normalize(vec3(scnDesc.i[gl_InstanceCustomIndexEXT].transfoIT * vec4(normal, 0.0)));
// Computing the coordinates of the hit position
vec3 worldPos = v0.pos * barycentrics.x + v1.pos * barycentrics.y + v2.pos * barycentrics.z;
// Transforming the position to world space
worldPos = vec3(scnDesc.i[gl_InstanceID].transfo * vec4(worldPos, 1.0));
worldPos = vec3(scnDesc.i[gl_InstanceCustomIndexEXT].transfo * vec4(worldPos, 1.0));
// Vector toward the light
vec3 L;
@ -87,7 +87,7 @@ void main()
vec3 diffuse = computeDiffuse(mat, L, normal);
if(mat.textureId >= 0)
{
uint txtId = mat.textureId + scnDesc.i[gl_InstanceID].txtOffset;
uint txtId = mat.textureId + scnDesc.i[gl_InstanceCustomIndexEXT].txtOffset;
vec2 texCoord =
v0.texCoord * barycentrics.x + v1.texCoord * barycentrics.y + v2.texCoord * barycentrics.z;
diffuse *= texture(textureSamplers[nonuniformEXT(txtId)], texCoord).xyz;

2
ray_tracing_manyhits/README.md
View file

@ -286,7 +286,7 @@ The stride device address will be modified like this:
## Extending Hit
The SBT can be larger than the number of shading models, which could then be used to have one shader per instance with its own data. For some applications, instead of retrieving the material information as in the main tutorial using a storage buffer and indexing into it using the `gl_InstanceID`, it is possible to set all of the material information in the SBT.
The SBT can be larger than the number of shading models, which could then be used to have one shader per instance with its own data. For some applications, instead of retrieving the material information as in the main tutorial using a storage buffer and indexing into it using the `gl_InstanceCustomIndexEXT`, it is possible to set all of the material information in the SBT.
The following modification will add another entry to the SBT with a different color per instance. The new SBT hit group (2) will use the same CHIT handle (4) as hit group 1.

2
ray_tracing_manyhits/hello_vulkan.cpp
View file

@ -693,7 +693,7 @@ void HelloVulkan::createTopLevelAS()
{
nvvk::RaytracingBuilderKHR::Instance rayInst;
rayInst.transform = m_objInstance[i].transform; // Position of the instance
rayInst.instanceId = i; // gl_InstanceID
rayInst.instanceCustomId = i; // gl_InstanceCustomIndexEXT
rayInst.blasId = m_objInstance[i].objIndex;
rayInst.flags = VK_GEOMETRY_INSTANCE_TRIANGLE_FACING_CULL_DISABLE_BIT_KHR;
rayInst.hitGroupId = m_objInstance[i].hitgroup; // Using the hit group set in main

8
ray_tracing_manyhits/shaders/raytrace.rchit
View file

@ -37,7 +37,7 @@ pushC;
void main()
{
// Object of this instance
uint objId = scnDesc.i[gl_InstanceID].objId;
uint objId = scnDesc.i[gl_InstanceCustomIndexEXT].objId;
// Indices of the triangle
ivec3 ind = ivec3(indices[nonuniformEXT(objId)].i[3 * gl_PrimitiveID + 0], //
@ -53,13 +53,13 @@ void main()
// Computing the normal at hit position
vec3 normal = v0.nrm * barycentrics.x + v1.nrm * barycentrics.y + v2.nrm * barycentrics.z;
// Transforming the normal to world space
normal = normalize(vec3(scnDesc.i[gl_InstanceID].transfoIT * vec4(normal, 0.0)));
normal = normalize(vec3(scnDesc.i[gl_InstanceCustomIndexEXT].transfoIT * vec4(normal, 0.0)));
// Computing the coordinates of the hit position
vec3 worldPos = v0.pos * barycentrics.x + v1.pos * barycentrics.y + v2.pos * barycentrics.z;
// Transforming the position to world space
worldPos = vec3(scnDesc.i[gl_InstanceID].transfo * vec4(worldPos, 1.0));
worldPos = vec3(scnDesc.i[gl_InstanceCustomIndexEXT].transfo * vec4(worldPos, 1.0));
// Vector toward the light
vec3 L;
@ -87,7 +87,7 @@ void main()
vec3 diffuse = computeDiffuse(mat, L, normal);
if(mat.textureId >= 0)
{
uint txtId = mat.textureId + scnDesc.i[gl_InstanceID].txtOffset;
uint txtId = mat.textureId + scnDesc.i[gl_InstanceCustomIndexEXT].txtOffset;
vec2 texCoord =
v0.texCoord * barycentrics.x + v1.texCoord * barycentrics.y + v2.texCoord * barycentrics.z;
diffuse *= texture(textureSamplers[nonuniformEXT(txtId)], texCoord).xyz;

2
ray_tracing_rayquery/hello_vulkan.cpp
View file

@ -702,7 +702,7 @@ void HelloVulkan::createTopLevelAS()
{
nvvk::RaytracingBuilderKHR::Instance rayInst;
rayInst.transform = m_objInstance[i].transform; // Position of the instance
rayInst.instanceId = i; // gl_InstanceID
rayInst.instanceCustomId = i; // gl_InstanceCustomIndexEXT
rayInst.blasId = m_objInstance[i].objIndex;
rayInst.hitGroupId = 0; // We will use the same hit group for all objects
rayInst.flags = VK_GEOMETRY_INSTANCE_TRIANGLE_FACING_CULL_DISABLE_BIT_KHR;

2
ray_tracing_reflections/hello_vulkan.cpp
View file

@ -694,7 +694,7 @@ void HelloVulkan::createTopLevelAS()
{
nvvk::RaytracingBuilderKHR::Instance rayInst;
rayInst.transform = m_objInstance[i].transform; // Position of the instance
rayInst.instanceId = i; // gl_InstanceID
rayInst.instanceCustomId = i; // gl_InstanceCustomIndexEXT
rayInst.blasId = m_objInstance[i].objIndex;
rayInst.hitGroupId = 0; // We will use the same hit group for all objects
rayInst.flags = VK_GEOMETRY_INSTANCE_TRIANGLE_FACING_CULL_DISABLE_BIT_KHR;

8
ray_tracing_reflections/shaders/raytrace.rchit
View file

@ -37,7 +37,7 @@ pushC;
void main()
{
// Object of this instance
uint objId = scnDesc.i[gl_InstanceID].objId;
uint objId = scnDesc.i[gl_InstanceCustomIndexEXT].objId;
// Indices of the triangle
ivec3 ind = ivec3(indices[nonuniformEXT(objId)].i[3 * gl_PrimitiveID + 0], //
@ -53,13 +53,13 @@ void main()
// Computing the normal at hit position
vec3 normal = v0.nrm * barycentrics.x + v1.nrm * barycentrics.y + v2.nrm * barycentrics.z;
// Transforming the normal to world space
normal = normalize(vec3(scnDesc.i[gl_InstanceID].transfoIT * vec4(normal, 0.0)));
normal = normalize(vec3(scnDesc.i[gl_InstanceCustomIndexEXT].transfoIT * vec4(normal, 0.0)));
// Computing the coordinates of the hit position
vec3 worldPos = v0.pos * barycentrics.x + v1.pos * barycentrics.y + v2.pos * barycentrics.z;
// Transforming the position to world space
worldPos = vec3(scnDesc.i[gl_InstanceID].transfo * vec4(worldPos, 1.0));
worldPos = vec3(scnDesc.i[gl_InstanceCustomIndexEXT].transfo * vec4(worldPos, 1.0));
// Vector toward the light
vec3 L;
@ -87,7 +87,7 @@ void main()
vec3 diffuse = computeDiffuse(mat, L, normal);
if(mat.textureId >= 0)
{
uint txtId = mat.textureId + scnDesc.i[gl_InstanceID].txtOffset;
uint txtId = mat.textureId + scnDesc.i[gl_InstanceCustomIndexEXT].txtOffset;
vec2 texCoord =
v0.texCoord * barycentrics.x + v1.texCoord * barycentrics.y + v2.texCoord * barycentrics.z;
diffuse *= texture(textureSamplers[nonuniformEXT(txtId)], texCoord).xyz;