To query acceleration structure size parameters call:
// Provided by VK_NV_ray_tracing void vkCmdWriteAccelerationStructuresPropertiesNV( VkCommandBuffer commandBuffer, uint32_t accelerationStructureCount, const VkAccelerationStructureNV* pAccelerationStructures, VkQueryType queryType, VkQueryPool queryPool, uint32_t firstQuery);
commandBufferis the command buffer into which the command will be recorded.
accelerationStructureCountis the count of acceleration structures for which to query the property.
pAccelerationStructuresis a pointer to an array of existing previously built acceleration structures.
queryTypeis a VkQueryType value specifying the type of queries managed by the pool.
queryPoolis the query pool that will manage the results of the query.
firstQueryis the first query index within the query pool that will contain the
accelerationStructureCountnumber of results.
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.