What am I doing wrong (RWStructuredBuffer)

I've taken out a lot of the code but the problem lies somewhere in passing the RWStructuredBuffer and I've included how I'm declaring it... Debug prints out "0" for simulationVariableArray[0] in the C# code... It would appear it isn't being passed to the shader correctly. Getting a pink screen and occassionally popping the error:
"Shader error in 'TriplePassShaderWithStructuredBuffer': maximum UAV register index exceeded, target has 0 slots, manual bind to slot u1 failed at line 256 (on d3d11)"

I declared "register(u1)" in the shader and "Graphics.SetRandomWriteTarget(1, simulationVariablesBuffer, true);" in the C# code. Anyone know what I'm missing?


Inside shader:

Code (CSharp):

1. GrabPass {
2.            ...
3.            
4.             sampler2D _GrabTex2;
5.      
6.        // Variables passed in from RunShaderWithBuffer
7.             uniform RWStructuredBuffer<float4> simulationVariables : register(u1); // x = r1, y = r2, z = r3, w = ca
8.            ...
9.  
10.              fixed4 frag(v2f i) : SV_Target{
11.  
12.                    fixed4 col = tex2D(_GrabTex2, i.grabPos);        
13.                    col.r = simulationVariables[0].x; // xPixel * yResolution + yPixel].x;
14.                     col.b = simulationVariables[0].x; //xPixel * yResolution + yPixel].x;
15.                     col.g = simulationVariables[0].x; //xPixel * yResolution + yPixel].x;
16.                     col.a = 1.0;
17.                    return col;
18.                    
19.                }

Inside C#

Code (CSharp):

1.  
2. using System.Collections;
3. using System.Collections.Generic;
4. using UnityEngine;
5. using System;
6.  
7. public class RunShaderWithBuffer : MonoBehaviour
8. {
9.     public Material mater;
10.     private RenderTexture buff;
11.  
12.     // Update is called once per frame
13.     private float lastUpdateTime = 0;
14.     public float updateInterval = 0f;
15.    
16.     //Structured buffer variables
17.     private ComputeBuffer electrodePositionBuffer;
18.     ComputeBuffer simulationVariablesBuffer; // x = r1, y = r2, z = r3, w = ca
19.     private bool firstRender = true;
20.     Vector4[] simulationVariableArray;
21.    
22.    ...
23.  
24.     private void OnRenderImage(RenderTexture source, RenderTexture destination)
25.     {
26.         if (firstRender)
27.         {
28.             width = source.width;
29.             height = source.height;
30.             lastFrameTime = Time.time;
31.             setVariables();
32.  
33.             float[] electrodePositionArray1D = CSMain1D();
34.             stride = System.Runtime.InteropServices.Marshal.SizeOf(typeof(float));
35.             electrodePositionBuffer = new ComputeBuffer( electrodePositionArray1D.Length, stride, ComputeBufferType.Default);
36.             electrodePositionBuffer.SetData(electrodePositionArray1D);
37.  
38.             simulationVariableArray = InitializeSimulationVariables();
39.             stride = System.Runtime.InteropServices.Marshal.SizeOf(typeof(Vector4));
40.             simulationVariablesBuffer = new ComputeBuffer(simulationVariableArray.Length, stride, ComputeBufferType.Default);
41.             simulationVariablesBuffer.SetData(simulationVariableArray);
42.             Graphics.SetRandomWriteTarget(1, simulationVariablesBuffer, true);
43.            
44.             mater.SetBuffer("electrodePositionBuffer", electrodePositionBuffer);
45.             mater.SetBuffer("simulationVariables", simulationVariablesBuffer);
46.             mater.SetFloat("xPixelSize", (float)(1.0/width));
47.             mater.SetFloat("yPixelSize", (float)(1.0/height));
48.             mater.SetInt("xElectrodes", xElectrodes);
49.             mater.SetInt("yElectrodes", yElectrodes);
50.             mater.SetInt("xResolution", width);
51.             mater.SetInt("yResolution", height);
52.             mater.SetInt("numberElectrodes", numberElectrodes);
53.             mater.SetInt("fov", fov);
54.             mater.SetFloat("rho", rho);
55.             mater.SetFloat("threshold", threshold);
56.             firstRender = false;
57.         }
58.  
59.         /*frameRenderTime = Time.time - lastFrameTime;
60.         currentTime = frameRenderTime.ToString("f6");
61.         currentTime = "Frame refresh rate is: " + currentTime + " sec.";
62.         Debug.Log(currentTime);
63.         lastFrameTime = Time.time; */
64.  
65.         //Debug.Log(simulationVariableArray[0].x);
66.        
67.        
68.        
69.         if (Time.time > lastUpdateTime + updateInterval)
70.         {
71.             Graphics.Blit(source, buff, mater);
72.             lastUpdateTime = Time.time;
73.         }
74.         Graphics.Blit(buff, destination);
75.     }
76.  
77.     private void OnApplicationQuit()
78.     {
79.         electrodePositionBuffer.Release();
80.         simulationVariablesBuffer.Release();
81.     }
82. }
83.  

 

After hours upon hours of struggling with this, I realized I didn't have the line "#pragma target 5.0"

 

Thank you it helped me

 

Your hours of struggling has helped another helpless soul!