Rearrange DecalProjector so Unity sees it

Assets/Plugins/DecalProjectorTest.cs

@@ -0,0 +1,47 @@
+using UnityEngine;
+
+[ExecuteInEditMode]
+public class DecalProjectorTest : MonoBehaviour
+{
+    public GameObject target = null;
+    public Material targetMaterial = null;
+    public MeshRenderer targetRenderer;
+
+
+    public float aspectRatio = 1.0f;
+    public float size = 1.0f;
+    public float factor = 1.0f;
+
+    private Matrix4x4 _projectionMatrix;
+    private Matrix4x4 _OrthoMatrix;
+
+    private int _matrixID;
+    private int _normalID;
+    public int _tangentID;
+    
+    // Start is called before the first frame update
+    void Awake()
+    {
+        _projectionMatrix = Matrix4x4.identity;
+        _matrixID = Shader.PropertyToID("_ProjectionMatrix");
+        _normalID = Shader.PropertyToID("_DecalNormal");
+        _tangentID= Shader.PropertyToID("_DecalTangent");
+        targetRenderer = target.GetComponent<MeshRenderer>();
+    }
+
+    // Update is called once per frame
+    void Update()
+    {
+        Vector3 pos =new Vector3( 0.5f ,0.5f, 0);
+        Vector3 scale = new Vector3(1 / size, 1 / (aspectRatio * size), 1);
+        _OrthoMatrix.SetTRS(pos, Quaternion.identity, scale);
+        //Debug.Log(_OrthoMatrix);
+        var targetToProjector = transform.worldToLocalMatrix * targetRenderer.localToWorldMatrix;
+        var projectorToTarget = targetRenderer.worldToLocalMatrix * transform.localToWorldMatrix;
+        _projectionMatrix = _OrthoMatrix * targetToProjector;
+        
+        targetMaterial.SetMatrix(_matrixID, _projectionMatrix);
+        targetMaterial.SetVector(_normalID, projectorToTarget.MultiplyVector(Vector3.back).normalized);
+        targetMaterial.SetVector(_tangentID, projectorToTarget.MultiplyVector(Vector3.right).normalized);
+    }
+}