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Zero
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/*
* Serialize a voxel grid
*
* Copyright (C) 2024, Jianfeng XIANG <[email protected]>
* All rights reserved.
*
* Licensed under The MIT License [see LICENSE for details]
*
* Written by Jianfeng XIANG
*/
#pragma once
#include <torch/extension.h>
#define BLOCK_SIZE 256
/**
* Z-order encode 3D points
*
* @param x [N] tensor containing the x coordinates
* @param y [N] tensor containing the y coordinates
* @param z [N] tensor containing the z coordinates
*
* @return [N] tensor containing the z-order encoded values
*/
torch::Tensor
z_order_encode(
const torch::Tensor& x,
const torch::Tensor& y,
const torch::Tensor& z
);
/**
* Z-order decode 3D points
*
* @param codes [N] tensor containing the z-order encoded values
*
* @return 3 tensors [N] containing the x, y, z coordinates
*/
std::tuple<torch::Tensor, torch::Tensor, torch::Tensor>
z_order_decode(
const torch::Tensor& codes
);
/**
* Hilbert encode 3D points
*
* @param x [N] tensor containing the x coordinates
* @param y [N] tensor containing the y coordinates
* @param z [N] tensor containing the z coordinates
*
* @return [N] tensor containing the Hilbert encoded values
*/
torch::Tensor
hilbert_encode(
const torch::Tensor& x,
const torch::Tensor& y,
const torch::Tensor& z
);
/**
* Hilbert decode 3D points
*
* @param codes [N] tensor containing the Hilbert encoded values
*
* @return 3 tensors [N] containing the x, y, z coordinates
*/
std::tuple<torch::Tensor, torch::Tensor, torch::Tensor>
hilbert_decode(
const torch::Tensor& codes
);
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