Unity用デバッググラフ（３軸）を描画するクラス。

DebugGrapher.cs

using UnityEngine;
using System.Collections.Generic;
 
/// <summary>
/// Debug grapher.
/// </summary>
[RequireComponent (typeof(Camera))]
public class DebugGrapher : MonoBehaviour
{
  
	#region Privates
	List<Vector3> values;
	Transform cameraPositon;
	#endregion
	
	#region Props
	[SerializeField]
	int maxValues;
	[SerializeField]
	Vector2 scale;
	[SerializeField]
	Vector3 position;
	#endregion
 
	#region Lifecyecles
	void Start ()
	{
		values = new List<Vector3> ();
		this.cameraPositon = transform;
	}
	
	void OnPostRender ()
	{
		CreateLineMaterial ();
		
		// set the current material
		lineMaterial.SetPass (0);
		
		float num = values.Count;
		if (num < 2) {
			return;
		}
		Vector3 pos = cameraPositon.position + position;
		GL.Begin (GL.LINES);
		
		// draw x
		GL.Color (Color.red);
		for (int i=1; i<num; ++i) {
			GL.Vertex (pos + new Vector3 (((i-1) / num - 0.5f) * scale.x, values [i-1].x * scale.y, 10));
			GL.Vertex (pos + new Vector3 ((i / num - 0.5f) * scale.x, values [i].x * scale.y, 10));
		}
		// draw y
		GL.Color (Color.green);
		for (int i=1; i<num; ++i) {
			GL.Vertex (pos + new Vector3 (((i-1) / num - 0.5f) * scale.x, values [i-1].y * scale.y, 10));
			GL.Vertex (pos + new Vector3 ((i / num - 0.5f) * scale.x, values [i].y * scale.y, 10));
		}
		// draw z
		GL.Color (Color.blue);
		for (int i=1; i<num; ++i) {
			GL.Vertex (pos + new Vector3 (((i-1) / num - 0.5f) * scale.x, values [i-1].z * scale.y, 10));
			GL.Vertex (pos + new Vector3 ((i / num - 0.5f) * scale.x, values [i].z * scale.y, 10));
		}
		GL.End ();
	}
	#endregion
	
	#region private
	void Draw (int index, int num)
	{
	}
	#endregion
	
	#region Public
	public void AddValue (Vector3 value)
	{
		values.Add (value);
		
		while (values.Count > maxValues) {
			values.RemoveAt (0);
		}
	}
	
	public void AddValue (float x, float y, float z)
	{
		AddValue(new Vector3(x,y,z));
	}
	#endregion
	
	
	
	#region LineMaterial
	static  Material lineMaterial;
 
	static void CreateLineMaterial ()
	{
		if (!lineMaterial) {
			lineMaterial = new Material ("Shader \"Lines/Colored Blended\" {" +
	            "SubShader { Pass { " +
	            "    Blend SrcAlpha OneMinusSrcAlpha " +
	            "    ZWrite Off Cull Off Fog { Mode Off } " +
	            "    BindChannels {" +
	            "      Bind \"vertex\", vertex Bind \"color\", color }" +
	            "} } }");
			lineMaterial.hideFlags = HideFlags.HideAndDontSave;
			lineMaterial.shader.hideFlags = HideFlags.HideAndDontSave;
		}
	}
	#endregion
	
}