C Specification
Bits which can be set in
VkAccelerationStructureCreateInfoKHR::flags
or
VkAccelerationStructureInfoNV::flags
specifying additional parameters for acceleration structure builds, are:
typedef enum VkBuildAccelerationStructureFlagBitsKHR {
VK_BUILD_ACCELERATION_STRUCTURE_ALLOW_UPDATE_BIT_KHR = 0x00000001,
VK_BUILD_ACCELERATION_STRUCTURE_ALLOW_COMPACTION_BIT_KHR = 0x00000002,
VK_BUILD_ACCELERATION_STRUCTURE_PREFER_FAST_TRACE_BIT_KHR = 0x00000004,
VK_BUILD_ACCELERATION_STRUCTURE_PREFER_FAST_BUILD_BIT_KHR = 0x00000008,
VK_BUILD_ACCELERATION_STRUCTURE_LOW_MEMORY_BIT_KHR = 0x00000010,
VK_BUILD_ACCELERATION_STRUCTURE_ALLOW_UPDATE_BIT_NV = VK_BUILD_ACCELERATION_STRUCTURE_ALLOW_UPDATE_BIT_KHR,
VK_BUILD_ACCELERATION_STRUCTURE_ALLOW_COMPACTION_BIT_NV = VK_BUILD_ACCELERATION_STRUCTURE_ALLOW_COMPACTION_BIT_KHR,
VK_BUILD_ACCELERATION_STRUCTURE_PREFER_FAST_TRACE_BIT_NV = VK_BUILD_ACCELERATION_STRUCTURE_PREFER_FAST_TRACE_BIT_KHR,
VK_BUILD_ACCELERATION_STRUCTURE_PREFER_FAST_BUILD_BIT_NV = VK_BUILD_ACCELERATION_STRUCTURE_PREFER_FAST_BUILD_BIT_KHR,
VK_BUILD_ACCELERATION_STRUCTURE_LOW_MEMORY_BIT_NV = VK_BUILD_ACCELERATION_STRUCTURE_LOW_MEMORY_BIT_KHR,
VK_BUILD_ACCELERATION_STRUCTURE_FLAG_BITS_MAX_ENUM_KHR = 0x7FFFFFFF
} VkBuildAccelerationStructureFlagBitsKHR;
or the equivalent
typedef VkBuildAccelerationStructureFlagBitsKHR VkBuildAccelerationStructureFlagBitsNV;
Description
-
VK_BUILD_ACCELERATION_STRUCTURE_ALLOW_UPDATE_BIT_KHRindicates that the specified acceleration structure can be updated withupdateofVK_TRUEin vkCmdBuildAccelerationStructureKHR or vkCmdBuildAccelerationStructureNV . -
VK_BUILD_ACCELERATION_STRUCTURE_ALLOW_COMPACTION_BIT_KHRindicates that the specified acceleration structure can act as the source for a copy acceleration structure command withmodeofVK_COPY_ACCELERATION_STRUCTURE_MODE_COMPACT_KHRto produce a compacted acceleration structure. -
VK_BUILD_ACCELERATION_STRUCTURE_PREFER_FAST_TRACE_BIT_KHRindicates that the given acceleration structure build should prioritize trace performance over build time. -
VK_BUILD_ACCELERATION_STRUCTURE_PREFER_FAST_BUILD_BIT_KHRindicates that the given acceleration structure build should prioritize build time over trace performance. -
VK_BUILD_ACCELERATION_STRUCTURE_LOW_MEMORY_BIT_KHRindicates that this acceleration structure should minimize the size of the scratch memory and the final result build, potentially at the expense of build time or trace performance.
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Note
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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.
Copyright
Copyright (c) 2014-2020 Khronos Group. This work is licensed under a Creative Commons Attribution 4.0 International License.