vkCmdBuildMicromapsEXT

To build micromaps call:

void vkCmdBuildMicromapsEXT(
    VkCommandBuffer                                    commandBuffer,
    uint32_t infoCount,
    const VkMicromapBuildInfoEXT* pInfos);

• commandBuffer is the command buffer into which the command will be recorded.
• infoCount is the number of micromaps to build. It specifies the number of the pInfos structures that must be provided.
• pInfos is a pointer to an array of infoCount
  VkMicromapBuildInfoEXT structures defining the data used to build each micromap.

The vkCmdBuildMicromapsEXT command provides the ability to initiate multiple micromaps builds, however there is no ordering or synchronization implied between any of the individual micromap builds.

Accesses to the micromap scratch buffers as identified by the VkMicromapBuildInfoEXT::scratchData buffer device addresses must be synchronized with the VK_PIPELINE_STAGE_2_MICROMAP_BUILD_BIT_EXT

pipeline stage and an access type of (VK_ACCESS_2_MICROMAP_READ_BIT_EXT | VK_ACCESS_2_MICROMAP_WRITE_BIT_EXT). Accesses to VkMicromapBuildInfoEXT::dstMicromap must be synchronized with the VK_PIPELINE_STAGE_2_MICROMAP_BUILD_BIT_EXT

pipeline stage and an access type of VK_ACCESS_2_MICROMAP_WRITE_BIT_EXT.

Accesses to other input buffers as identified by any used values of VkMicromapBuildInfoEXT::data or VkMicromapBuildInfoEXT::triangleArray must be synchronized with the VK_PIPELINE_STAGE_2_MICROMAP_BUILD_BIT_EXT

pipeline stage and an access type of VK_ACCESS_SHADER_READ_BIT.