#pragma once #include #include #include "util.hpp" #include struct OctState { int parent_stack_position = 0; uint64_t parent_stack[32] = { 0 }; uint8_t scale = 0; uint8_t idx_stack[32] = { 0 }; uint64_t current_descriptor; sf::Vector3i oct_pos; // ====== DEBUG ======= char found = 1; }; class Octree { public: static const int buffer_size = 300000; Octree(); ~Octree() {}; // Generate an octree from 3D indexed array of char data void Generate(char* data, sf::Vector3i dimensions); // TODO: Load the octree from a serialized or whatever file void Load(std::string octree_file_name); // I think the best way to transfer all of the data to the GPU. Each buffer will contain a set of blocks // except for the trunk buffer. The paper indicates that the cutoff point for the trunk can vary, // but since I'm going to do seperate buffers, I'm going to set a hard cutoff for the trunk so we // know when to switch buffers uint64_t *descriptor_buffer; uint64_t descriptor_buffer_position = buffer_size; uint32_t *attachment_lookup; uint64_t attachment_lookup_position = buffer_size; uint64_t *attachment_buffer; uint64_t attachment_buffer_position = buffer_size; unsigned int trunk_cutoff = 3; uint64_t root_index = 0; int page_header_counter = 0x8000; // Cheat and underflow to get the position uint64_t current_info_section_position = ((uint64_t)0)-1; uint64_t stack_pos = 0x8000; uint64_t global_pos = buffer_size - 50; // With a position and the head of the stack. Traverse down the voxel hierarchy to find // the IDX and stack position of the highest resolution (maybe set resolution?) oct OctState GetVoxel(sf::Vector3i position); void print_block(int block_pos); bool Validate(char* data, sf::Vector3i dimensions); unsigned int getDimensions(); // (X, Y, Z) mask for the idx static const uint8_t idx_set_x_mask = 0x1; static const uint8_t idx_set_y_mask = 0x2; static const uint8_t idx_set_z_mask = 0x4; // Mask for checking if valid or leaf static const uint8_t mask_8[8]; // Mask for counting the previous valid bits static const uint8_t count_mask_8[8]; // uint64_t manipulation masks static const uint64_t child_pointer_mask = 0x0000000000007fff; static const uint64_t far_bit_mask = 0x8000; static const uint64_t valid_mask = 0xFF0000; static const uint64_t leaf_mask = 0xFF000000; static const uint64_t contour_pointer_mask = 0xFFFFFF00000000; static const uint64_t contour_mask = 0xFF00000000000000; std::vector> Octree::CastRayOctree( sf::Vector2f cam_dir, sf::Vector3f cam_pos ); private: unsigned int oct_dimensions = 1; std::tuple GenerationRecursion( char* data, // raw octree data sf::Vector3i dimensions, // dimensions of the raw data sf::Vector3i pos, // position of this generation node unsigned int voxel_scale // the voxel scale of this node ); char get1DIndexedVoxel(char* data, sf::Vector3i dimensions, sf::Vector3i position); std::vector anchor_stack; unsigned int octree_voxel_dimension = 32; // ======= DEBUG =========== int counter = 0; std::stringstream output_stream; // ========================= };