ConsoleHelper.cs

using System;
using System.Collections;
using System.Collections.Generic;
using System.Reflection;
using System.Text.RegularExpressions;
using UnityEditor;
using UnityEngine;


[InitializeOnLoad]
public class ConsoleHelperStartup
{
    static ConsoleHelperStartup()
    {
        ConsoleHelper.Begin();
    }
}

public class ConsoleHelper
{
    static ConsoleHelper instance;
    EditorWindow wnd_;
    string cachedLog;
    Func<string> GetSelectedLog;
    List<PointItem> points = new List<PointItem>();
    Regex vec3Regex;
    Regex vec2Regex;
    PointItemComparer comparer = new PointItemComparer();

    struct PointItem
    {
        public int order;
        public Vector3 p;
    }

    class PointItemComparer : IComparer<PointItem>
    {
        public int Compare(PointItem x, PointItem y)
        {
            return x.order.CompareTo(y.order);
        }
    }



    public static void Begin()
    {
        if (instance == null)
        {
            instance = new ConsoleHelper();
            instance.Begin_();
        }
    }


    void Begin_()
    {
        EditorApplication.update += OnUpdate;
        SceneView.duringSceneGui += OnScene;

        var bf = BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static;
        var type = typeof(Editor).Assembly.GetType("UnityEditor.ConsoleWindow");
        var fieldInfo = type.GetField("m_ActiveText", bf);
        GetSelectedLog = () => wnd == null ? null : (string)fieldInfo.GetValue(wnd);

        var lb = Regex.Escape("(");
        var rb = Regex.Escape(")");
        var dot = Regex.Escape(".");
        var num = "[-+]?[0-9]*" + dot + "?[0-9]+";

        vec3Regex = new Regex(lb + $"({num}), ({num}), ({num})" + rb);
        vec2Regex = new Regex(lb + $"({num}), ({num})" + rb);
    }

    void OnUpdate()
    {
        var nowLog = GetSelectedLog();
        if (nowLog != cachedLog)
        {
            cachedLog = nowLog;

            UpdatePoints();

            SceneView.RepaintAll();
        }
    }

    void UpdatePoints()
    {
        points.Clear();
        if (string.IsNullOrEmpty(cachedLog))
            return;

        var matches = vec3Regex.Matches(cachedLog);
        foreach (Match m in matches)
        {
            var x = float.Parse(m.Groups[1].Value);
            var y = float.Parse(m.Groups[2].Value);
            var z = float.Parse(m.Groups[3].Value);

            points.Add(new PointItem{order = m.Index, p = new Vector3(x, y, z)});
        }

        matches = vec2Regex.Matches(cachedLog);
        foreach (Match m in matches)
        {
            var x = float.Parse(m.Groups[1].Value);
            var y = float.Parse(m.Groups[2].Value);
            var z = 0;

            points.Add(new PointItem{order = m.Index, p = new Vector3(x, y, z)});
        }

        points.Sort(comparer);
    }

    void OnScene(SceneView sceneview)
    {
        //Handles.BeginGUI();


        for (int i = 0; i < points.Count; i++)
        {
            var item = points[i];
            var color = GetColor(i);
            //Handles.DrawLine(p, p + new Vector3(1,0,0));
            //Handles.DrawSphere(i+998, item.p, Quaternion.identity, 0.15f);
            Handles.color = new Color(color.r, color.g, color.b, 0.8f);
            Handles.DrawWireDisc(item.p, new Vector3(0,0,-1), 0.15f);
            Handles.color = color;
            Handles.DrawLine(item.p + new Vector3(-0.05f, 0, 0), item.p + new Vector3(0.05f, 0, 0));
            Handles.DrawLine(item.p + new Vector3(0, -0.05f, 0), item.p + new Vector3(0, 0.05f, 0));
        }

        //Handles.EndGUI();
    }

    Color GetColor(int i)
    {
        if (i == 0)
            return Color.red;
        else if (i == 1)
            return Color.green;
        else if (i == 2)
            return Color.blue;
        else
            return Color.black;
    }

    EditorWindow wnd
    {
        get
        {
            if (!wnd_)
            {
                var windows = Resources.FindObjectsOfTypeAll(typeof(Editor).Assembly.GetType("UnityEditor.ConsoleWindow"));
                if (windows.Length == 0)
                    return null;
                wnd_ = windows[0] as EditorWindow;
            }
            return wnd_;
        }
    }
}