Show graph as unity custom attribute

GraphAttribute.cs

/*
MIT License

Copyright (c) 2021 Koki Ibukuro

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/

using System;
using System.Collections.Generic;
using System.Linq;
using UnityEngine;
#if UNITY_EDITOR
using UnityEditor;
#endif

public sealed class GraphAttribute : PropertyAttribute
{
    public int count;
    public GraphAttribute(int count)
    {
        this.count = count;
    }
}

#if UNITY_EDITOR
[CustomPropertyDrawer(typeof(GraphAttribute))]
public sealed class GraphDrawer : PropertyDrawer
{
    private static readonly Color[] colors = { Color.red, Color.green, Color.blue, Color.cyan };
    private List<float[]> data;
    private int maxCount;
    private bool showGraph = true;

    private void Setup(GraphAttribute attr)
    {
        data = new List<float[]>();
        maxCount = attr.count;
    }

    public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
    {
        var type = property.propertyType;
        int dimensions = GetDimensions(type);
        if (dimensions <= 0)
        {
            throw new Exception("Unsupported property");
        }
        if (data == null)
        {
            Setup((GraphAttribute)attribute);
        }

        data.Add(GetRawValues(property));
        while (data.Count > maxCount)
        {
            data.RemoveAt(0);
        }

        // Draw Vector3
        EditorGUI.BeginProperty(position, label, property);
        {
            Rect rect = position;
            rect.height = 16;
            DrawPropertyField(rect, property, label);

            rect.y += 20f;
            showGraph = EditorGUI.Foldout(rect, showGraph, "Graph");
            if (showGraph)
            {
                rect.x += 50f;
                rect.y += 20f;
                rect.width -= 50f;
                rect.height = 200f;
                DrawGraph(rect, dimensions);
            }
        }
        EditorGUI.EndProperty();
    }

    public override float GetPropertyHeight(SerializedProperty property, GUIContent label)
    {
        float height = base.GetPropertyHeight(property, label);
        height += showGraph ? 240 : 40;
        return height;
    }

    private static int GetDimensions(SerializedPropertyType type)
    {
        switch (type)
        {
            case SerializedPropertyType.Float:
            case SerializedPropertyType.Integer:
            case SerializedPropertyType.Boolean:
                return 1;
            case SerializedPropertyType.Vector2:
            case SerializedPropertyType.Vector2Int:
                return 2;
            case SerializedPropertyType.Vector3:
            case SerializedPropertyType.Vector3Int:
                return 3;
            case SerializedPropertyType.Vector4:
            case SerializedPropertyType.Quaternion:
            case SerializedPropertyType.Color:
                return 4;
            default:
                return -1;
        }
    }

    private static float[] GetRawValues(SerializedProperty property)
    {
        switch (property.propertyType)
        {
            case SerializedPropertyType.Float:
                return new float[] { property.floatValue };
            case SerializedPropertyType.Integer:
                return new float[] { property.intValue };
            case SerializedPropertyType.Boolean:
                return new float[] { property.boolValue ? 1f : 0f };
            case SerializedPropertyType.Vector2:
                var v2 = property.vector2Value;
                return new float[] { v2[0], v2[1] };
            case SerializedPropertyType.Vector2Int:
                var v2i = property.vector2IntValue;
                return new float[] { v2i[0], v2i[1] };
            case SerializedPropertyType.Vector3:
                var v3 = property.vector3Value;
                return new float[] { v3[0], v3[1], v3[2] };
            case SerializedPropertyType.Vector3Int:
                var v3i = property.vector3IntValue;
                return new float[] { v3i[0], v3i[1], v3i[2] };
            case SerializedPropertyType.Vector4:
                var v4 = property.vector4Value;
                return new float[] { v4[0], v4[1], v4[2], v4[3] };
            case SerializedPropertyType.Quaternion:
                var q = property.quaternionValue;
                return new float[] { q[0], q[1], q[2], q[3] };
            case SerializedPropertyType.Color:
                var c = property.colorValue;
                return new float[] { c[0], c[1], c[2], c[3] };
            default:
                return null;
        }
    }

    private void DrawPropertyField(Rect position, SerializedProperty property, GUIContent label)
    {
        switch (property.propertyType)
        {
            case SerializedPropertyType.Quaternion:
                var q = property.quaternionValue;
                EditorGUI.Vector4Field(position, label, new Vector4(q[0], q[1], q[2], q[3]));
                return;
        }
        EditorGUI.PropertyField(position, property);
    }

    private void DrawGraph(Rect area, int dimensions)
    {
        // Rect area
        Handles.color = Color.white;
        Handles.DrawSolidRectangleWithOutline(area, new Color(0, 0, 0, 0.1f), Color.white);

        if (data.Count <= 0)
        {
            return;
        }

        // Draw Lines
        float max = data.Max(v => v.Max());
        float min = data.Min(v => v.Min());

        float dx = area.width / data.Count;
        float x0 = area.x;
        float y0 = area.y + area.height;

        // Draw min max
        EditorGUI.LabelField(new Rect(area.x - 50, area.y, 40, 16), string.Format("{0:f3}", max));
        EditorGUI.LabelField(new Rect(area.x - 50, area.y + area.height - 16, 40, 16), string.Format("{0:f3}", min));

        // Draw graph 
        for (int dim = 0; dim < dimensions; ++dim)
        {
            var values = new Vector3[data.Count];
            for (int i = 0; i < data.Count; ++i)
            {
                values[i] = new Vector3(
                    x0 + dx * i,
                    y0 - Mathf.InverseLerp(min, max, data[i][dim]) * area.height,
                    0
                );
            }
            Handles.color = colors[dim];
            Handles.DrawAAPolyLine(values.ToArray());
        }
    }
}
#endif

GraphAttributeTest.cs

using UnityEngine;

public class GraphAttributeTest : MonoBehaviour
{
    [Graph(100)]
    public int fps;

    [Graph(100)]
    public float positionX;

    [Graph(100)]
    public Vector2 positionXY;

    [Graph(50)]
    public Vector3 position;

    [Graph(50)]
    public Quaternion rotation;

    [Graph(20)]
    public Color color;


    void Start()
    {
        Application.runInBackground = true;
    }

    void Update ()
    {
        float t = Time.time * 1f;
        transform.Translate(new Vector3(
            Mathf.PerlinNoise(0, t) - 0.5f,
            Mathf.PerlinNoise(0.3f, t) - 0.5f,
            Mathf.PerlinNoise(0.7f, t) - 0.5f
        ) * 0.1f);

        transform.Rotate(new Vector3(
            Mathf.PerlinNoise(0.8f, t) - 0.5f,
            Mathf.PerlinNoise(0.46f, t) - 0.5f,
            Mathf.PerlinNoise(0.2f, t) - 0.5f
        ) * 30f);


        fps = Time.captureFramerate;
        position = transform.localPosition;
        positionX = position.x;
        positionXY = position;
        rotation = transform.localRotation;
    }
}