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/*
* Copyright © 2021 Bas Nieuwenhuizen
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#ifndef RADV_ACCELERATION_STRUCTURE_H
#define RADV_ACCELERATION_STRUCTURE_H
#include <stdint.h>
#include <vulkan/vulkan.h>
struct radv_accel_struct_serialization_header {
uint8_t driver_uuid[VK_UUID_SIZE];
uint8_t accel_struct_compat[VK_UUID_SIZE];
uint64_t serialization_size;
uint64_t compacted_size;
uint64_t instance_count;
uint64_t instances[];
};
struct radv_accel_struct_header {
uint32_t root_node_offset;
uint32_t reserved;
float aabb[2][3];
/* Everything after this gets updated/copied from the CPU. */
uint64_t compacted_size;
uint64_t serialization_size;
uint32_t copy_dispatch_size[3];
uint64_t instance_offset;
uint64_t instance_count;
};
struct radv_bvh_triangle_node {
float coords[3][3];
uint32_t reserved[3];
uint32_t triangle_id;
/* flags in upper 4 bits */
uint32_t geometry_id_and_flags;
uint32_t reserved2;
uint32_t id;
};
struct radv_bvh_aabb_node {
float aabb[2][3];
uint32_t primitive_id;
/* flags in upper 4 bits */
uint32_t geometry_id_and_flags;
uint32_t reserved[8];
};
struct radv_bvh_instance_node {
uint64_t base_ptr;
/* lower 24 bits are the custom instance index, upper 8 bits are the visibility mask */
uint32_t custom_instance_and_mask;
/* lower 24 bits are the sbt offset, upper 8 bits are VkGeometryInstanceFlagsKHR */
uint32_t sbt_offset_and_flags;
/* The translation component is actually a pre-translation instead of a post-translation. If you
* want to get a proper matrix out of it you need to apply the directional component of the
* matrix to it. The pre-translation of the world->object matrix is the same as the
* post-translation of the object->world matrix so this way we can share data between both
* matrices. */
float wto_matrix[12];
float aabb[2][3];
uint32_t instance_id;
/* Object to world matrix transposed from the initial transform. Translate part is store in the
* wto_matrix. */
float otw_matrix[9];
};
struct radv_bvh_box16_node {
uint32_t children[4];
uint32_t coords[4][3];
};
struct radv_bvh_box32_node {
uint32_t children[4];
float coords[4][2][3];
uint32_t reserved[4];
};
#endif
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