C Specification
The VkAccelerationStructureBuildGeometryInfoKHR structure is defined
as:
// Provided by VK_KHR_acceleration_structure
typedef struct VkAccelerationStructureBuildGeometryInfoKHR {
VkStructureType sType;
const void* pNext;
VkAccelerationStructureTypeKHR type;
VkBuildAccelerationStructureFlagsKHR flags;
VkBuildAccelerationStructureModeKHR mode;
VkAccelerationStructureKHR srcAccelerationStructure;
VkAccelerationStructureKHR dstAccelerationStructure;
uint32_t geometryCount;
const VkAccelerationStructureGeometryKHR* pGeometries;
const VkAccelerationStructureGeometryKHR* const* ppGeometries;
VkDeviceOrHostAddressKHR scratchData;
} VkAccelerationStructureBuildGeometryInfoKHR;
Members
-
sTypeis the type of this structure. -
pNextisNULLor a pointer to a structure extending this structure. -
typeis a VkAccelerationStructureTypeKHR value specifying the type of acceleration structure being built. -
flagsis a bitmask of VkBuildAccelerationStructureFlagBitsKHR specifying additional parameters of the acceleration structure. -
modeis a VkBuildAccelerationStructureModeKHR value specifying the type of operation to perform. -
srcAccelerationStructurepoints to an existing acceleration structure that is to be used to update thedstacceleration structure whenmodeisVK_BUILD_ACCELERATION_STRUCTURE_MODE_UPDATE_KHR. -
dstAccelerationStructurepoints to the target acceleration structure for the build. -
geometryCountspecifies the number of geometries that will be built intodstAccelerationStructure. -
pGeometriesis a pointer to an array of VkAccelerationStructureGeometryKHR structures. -
ppGeometriesis a pointer to an array of pointers to VkAccelerationStructureGeometryKHR structures. -
scratchDatais the device or host address to memory that will be used as scratch memory for the build.
Description
Only one of pGeometries or ppGeometries can be a valid pointer,
the other must be NULL.
Each element of the non-NULL array describes the data used to build each
acceleration structure geometry.
The index of each element of the pGeometries or ppGeometries
members of VkAccelerationStructureBuildGeometryInfoKHR is used as the
geometry index during ray traversal.
The geometry index is available in ray shaders via the
RayGeometryIndexKHR
built-in, and is used to
determine hit and intersection shaders executed during traversal.
The geometry index is available to ray queries via the
OpRayQueryGetIntersectionGeometryIndexKHR instruction.
See Also
VkAccelerationStructureGeometryKHR, VkAccelerationStructureKHR, VkAccelerationStructureTypeKHR, VkBuildAccelerationStructureFlagsKHR, VkBuildAccelerationStructureModeKHR, VkDeviceOrHostAddressKHR, VkStructureType, vkBuildAccelerationStructuresKHR, vkCmdBuildAccelerationStructuresIndirectKHR, vkCmdBuildAccelerationStructuresKHR, vkGetAccelerationStructureBuildSizesKHR
Document Notes
For more information, see the Vulkan Specification
This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.