1/* 2 * Copyright © 2022 Konstantin Seurer 3 * 4 * SPDX-License-Identifier: MIT 5 */ 6 7#version 460 8 9#extension GL_GOOGLE_include_directive : require 10 11#extension GL_EXT_shader_explicit_arithmetic_types_int8 : require 12#extension GL_EXT_shader_explicit_arithmetic_types_int16 : require 13#extension GL_EXT_shader_explicit_arithmetic_types_int32 : require 14#extension GL_EXT_shader_explicit_arithmetic_types_int64 : require 15#extension GL_EXT_shader_explicit_arithmetic_types_float16 : require 16#extension GL_EXT_scalar_block_layout : require 17#extension GL_EXT_buffer_reference : require 18#extension GL_EXT_buffer_reference2 : require 19 20layout(local_size_x = 64, local_size_y = 1, local_size_z = 1) in; 21 22#include "build_interface.h" 23 24layout(push_constant) uniform CONSTS { 25 morton_args args; 26}; 27 28uint32_t 29morton_component(uint32_t x) 30{ 31 x = (x * 0x00000101u) & 0x0F00F00Fu; 32 x = (x * 0x00000011u) & 0xC30C30C3u; 33 x = (x * 0x00000005u) & 0x49249249u; 34 return x; 35} 36 37uint32_t 38morton_code(uint32_t x, uint32_t y, uint32_t z) 39{ 40 return (morton_component(x) << 2) | (morton_component(y) << 1) | morton_component(z); 41} 42 43uint32_t 44lbvh_key(float x01, float y01, float z01) 45{ 46 return morton_code(uint32_t(x01 * 255.0), uint32_t(y01 * 255.0), uint32_t(z01 * 255.0)) << 8; 47} 48 49void 50main(void) 51{ 52 uint32_t global_id = gl_GlobalInvocationID.x; 53 54 REF(key_id_pair) key_id = INDEX(key_id_pair, args.ids, global_id); 55 56 uint32_t id = DEREF(key_id).id; 57 58 uint32_t key; 59 if (id != RADV_BVH_INVALID_NODE) { 60 radv_aabb bounds = DEREF(REF(radv_ir_node)OFFSET(args.bvh, ir_id_to_offset(id))).aabb; 61 vec3 center = (bounds.min + bounds.max) * 0.5; 62 63 radv_aabb bvh_bounds; 64 bvh_bounds.min.x = from_emulated_float(DEREF(args.header).min_bounds[0]); 65 bvh_bounds.min.y = from_emulated_float(DEREF(args.header).min_bounds[1]); 66 bvh_bounds.min.z = from_emulated_float(DEREF(args.header).min_bounds[2]); 67 bvh_bounds.max.x = from_emulated_float(DEREF(args.header).max_bounds[0]); 68 bvh_bounds.max.y = from_emulated_float(DEREF(args.header).max_bounds[1]); 69 bvh_bounds.max.z = from_emulated_float(DEREF(args.header).max_bounds[2]); 70 71 vec3 normalized_center = (center - bvh_bounds.min) / (bvh_bounds.max - bvh_bounds.min); 72 73 key = lbvh_key(normalized_center.x, normalized_center.y, normalized_center.z); 74 } else { 75 /* Move null instances to the end to avoid mixing null instances with active instances. This 76 * way, we can skip early during traversal. 77 */ 78 key = 0xFFFFFFFF; 79 } 80 DEREF(key_id).key = key; 81} 82