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potree importer
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‎src/Apps/Scratch/Potree/PotreeMetaData.cs‎

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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Text.Json;
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namespace Aardvark.Data.Potree
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{
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public static class PotreeMetaData
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{
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public static bool TryDeserialize(string filePath, out PotreeData data)
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{
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string json = File.ReadAllText(filePath);
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var options = new JsonSerializerOptions
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{
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PropertyNameCaseInsensitive = true
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};
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try
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{
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data = JsonSerializer.Deserialize<PotreeData>(json, options);
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return true;
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}
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catch (Exception ex)
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{
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//Serilog.Log.Error(ex);
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data = null;
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Console.WriteLine(ex.ToString());
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return false;
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}
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}
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public class PotreeData
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{
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public string version { get; set; }
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public string name { get; set; }
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public string description { get; set; }
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public double points { get; set; }
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public string projection { get; set; }
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public PotreeHierarchy hierarchy { get; set; }
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public double[] offset { get; set; }
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public double[] scale { get; set; }
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public double spacing { get; set; }
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public PotreeBoundingBox boundingBox { get; set; }
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public string encoding { get; set; }
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public PotreeAttribute[] attributes { get; set; }
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}
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public class PotreeHierarchy
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{
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public int firstChunkSize { get; set; }
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public int stepSize { get; set; }
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public int depth { get; set; }
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}
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public class PotreeBoundingBox
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{
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public double[] min { get; set; }
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public double[] max { get; set; }
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}
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public class PotreeAttribute
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{
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public string name { get; set; }
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public string description { get; set; }
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public int size { get; set; }
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public int numElements { get; set; }
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public int elementSize { get; set; }
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public string type { get; set; }
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public JsonElement[] min { get; set; }
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public JsonElement[] max { get; set; }
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public JsonElement[] scale { get; set; }
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public JsonElement[] offset { get; set; }
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public long[] histogram { get; set; }
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}
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public static object JsonElementToObject(JsonElement element)
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{
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switch (element.ValueKind)
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{
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case JsonValueKind.Object:
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var obj = new Dictionary<string, object>();
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foreach (var property in element.EnumerateObject())
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{
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obj[property.Name] = JsonElementToObject(property.Value);
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}
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return obj;
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case JsonValueKind.Array:
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var list = new List<object>();
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foreach (var item in element.EnumerateArray())
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{
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list.Add(JsonElementToObject(item));
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}
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return list;
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case JsonValueKind.String:
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return element.GetString();
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case JsonValueKind.Number:
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if (element.TryGetInt32(out int l))
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return l;
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else if (element.TryGetDouble(out double d))
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return d;
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else
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return element.GetRawText();
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case JsonValueKind.True:
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return true;
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case JsonValueKind.False:
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return false;
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case JsonValueKind.Null:
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return null;
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case JsonValueKind.Undefined:
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return null;
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}
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return null;
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}
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}
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}
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// "version": "2.0",
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// "name": "dense_pointcloud_100mio",
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// "description": "",
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// "points": 108692819,
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// "projection": "",
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// "hierarchy": {
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// "firstChunkSize": 4290,
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// "stepSize": 4,
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// "depth": 9
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// },
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// "offset": [71677.816000000006, 266019.81199999998, 669.71500000000003],
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// "scale": [0.001, 0.001, 0.001],
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// "spacing": 9.7567734375002146,
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// "boundingBox": {
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// "min": [71677.816000000006, 266019.81199999998, 669.71500000000003],
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// "max": [72926.683000000034, 267268.679, 1918.5820000000276]
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// },
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// "encoding": "BROTLI",
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// "attributes": [
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// {
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// "name": "position",
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// "description": "",
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// "size": 12,
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// "numElements": 3,
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// "elementSize": 4,
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// "type": "int32",
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// "min": [71677.816000000006, 266019.81199999998, 669.71500000000003],
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// "max": [72926.683000000005, 266554.69199999998, 825.78300000000002],
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// "scale": [1, 1, 1],
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// "offset": [0, 0, 0]
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//},{
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// "name": "intensity",
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// "description": "",
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// "size": 2,
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// "numElements": 1,
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// "elementSize": 2,
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// "type": "uint16",
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// "min": [0],
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// "max": [65535],
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// "scale": [1],
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// "offset": [0]
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// },{
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// "name": "return number",
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// "description": "",
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// "size": 1,
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// "numElements": 1,
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// "elementSize": 1,
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// "type": "uint8",
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// "min": [1],
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// "max": [1],
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// "scale": [1],
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// "offset": [0]
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// },{
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// "name": "number of returns",
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// "description": "",
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// "size": 1,
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// "numElements": 1,
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// "elementSize": 1,
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// "type": "uint8",
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// "min": [1],
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// "max": [1],
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// "scale": [1],
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// "offset": [0]
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// },{
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// "name": "classification",
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// "description": "",
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// "size": 1,
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// "numElements": 1,
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// "elementSize": 1,
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// "type": "uint8",
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// "histogram": [108692819, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
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// "min": [0],
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// "max": [0],
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// "scale": [1],
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// "offset": [0]
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// },{
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// "name": "scan angle rank",
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// "description": "",
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// "size": 1,
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// "numElements": 1,
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// "elementSize": 1,
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// "type": "uint8",
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// "min": [0],
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// "max": [0],
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// "scale": [1],
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// "offset": [0]
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// },{
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// "name": "user data",
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// "description": "",
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// "size": 1,
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// "numElements": 1,
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// "elementSize": 1,
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// "type": "uint8",
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// "min": [0],
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// "max": [0],
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// "scale": [1],
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// "offset": [0]
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// },{
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// "name": "point source id",
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// "description": "",
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// "size": 2,
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// "numElements": 1,
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// "elementSize": 2,
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// "type": "uint16",
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// "min": [1],
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// "max": [1],
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// "scale": [1],
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// "offset": [0]
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// },{
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// "name": "rgb",
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// "description": "",
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// "size": 6,
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// "numElements": 3,
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// "elementSize": 2,
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// "type": "uint16",
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// "min": [0, 0, 0],
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// "max": [65535, 65535, 65535],
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// "scale": [1, 1, 1],
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// "offset": [0, 0, 0]
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// }
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// ]

‎src/Apps/Scratch/Potree/PotreeNode.cs‎

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using Aardvark.Base;
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using System;
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using System.Collections.Generic;
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namespace Aardvark.Data.Potree
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{
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public class PotreeNode
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{
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public Guid Id { get; private set; }
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public string Name { get; set; }
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public int NodeType { get; set; }
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public bool HasChildren => !Children.IsEmpty();
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public long ByteOffset { get; set; }
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public long ByteSize { get; set; }
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public PotreeOctree OctreeRoot { get; private set; }
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public Box3d BoundingBox { get; private set; }
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public Dictionary<int, PotreeNode> Children { get; private set; }
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public long NumPoints { get; set; }
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public PotreeNode Parent { get; set; }
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public PotreeNode(string name, PotreeOctree rootGeometry, Box3d bbox)
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{
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Id = Guid.NewGuid();
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Name = name;
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OctreeRoot = rootGeometry;
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BoundingBox = bbox;
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Children = new Dictionary<int, PotreeNode>();
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NumPoints = 0;
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}
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}
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}

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