vkCmdBuildAccelerationStructureNV

To build an acceleration structure call:

void vkCmdBuildAccelerationStructureNV(
    VkCommandBuffer commandBuffer,
    const VkAccelerationStructureInfoNV* pInfo,
    VkBuffer instanceData,
    VkDeviceSize instanceOffset,
    VkBool32 update,
    VkAccelerationStructureNV dst,
    VkAccelerationStructureNV src,
    VkBuffer scratch,
    VkDeviceSize scratchOffset);

• commandBuffer is the command buffer into which the command will be recorded.
• pInfo contains the shared information for the acceleration structure’s structure.
• instanceData is the buffer containing an array of VkAccelerationStructureInstanceKHR structures defining acceleration structures. This parameter must be NULL for bottom level acceleration structures.
• instanceOffset is the offset in bytes (relative to the start of instanceData) at which the instance data is located.
• update specifies whether to update the dst acceleration structure with the data in src.
• dst is a pointer to the target acceleration structure for the build.
• src is a pointer to an existing acceleration structure that is to be used to update the dst acceleration structure.
• scratch is the VkBuffer that will be used as scratch memory for the build.
• scratchOffset is the offset in bytes relative to the start of scratch that will be used as a scratch memory.

Accesses to dst, src, and scratch must be synchronized with the VK_PIPELINE_STAGE_ACCELERATION_STRUCTURE_BUILD_BIT_KHR

pipeline stage and an access type of VK_ACCESS_ACCELERATION_STRUCTURE_READ_BIT_KHR or VK_ACCESS_ACCELERATION_STRUCTURE_WRITE_BIT_KHR.