StructuredBuffer reading problems

Unity Engine
1

Hi,

I’ve been trying to assign an float[ ] array to a StructuredBuffer in a compute shader and fill a RenderTexture with the values but no success. If i hardcode a value, let’s say red in the float4 in the cs kernel, i can see the render target red. However when i use the StructuredBuffer i get the default gray. Any brighter mind can bring some light? Thanks a lot in advance!

	float[] positionsX;
	float[] positionsY;
	float[] positionsZ;
	
	ComputeBuffer csPositionsX;
	ComputeBuffer csPositionsY;
	ComputeBuffer csPositionsZ;	
	
	Texture2D displacementTexture;
	RenderTexture csDispOut;
	
	// ----------  Initialize
	// Here this.DataLength = textureSize.x * textureSize.y;
	this.PositionsX = new float[this.DataLength]; 
	this.PositionsY = new float[this.DataLength];
	this.PositionsZ = new float[this.DataLength];
	
	this.displacementTexture = new Texture2D((int)this.TextureSize.x, (int)this.TextureSize.y, TextureFormat.ARGB32, true, true);
	this.displacementTexture.filterMode = FilterMode.Point;
	this.displacementTexture.wrapMode = TextureWrapMode.Clamp;
	
	this.csDispOut = new RenderTexture((int)this.TextureSize.x, (int)this.TextureSize.y, 8, RenderTextureFormat.ARGB32, RenderTextureReadWrite.Linear);
	this.csDispOut.enableRandomWrite = true;
	this.csDispOut.Create();
	
	this.csPositionsX = new ComputeBuffer(this.DataLength, 4, ComputeBufferType.Default);
	this.csPositionsY = new ComputeBuffer(this.DataLength, 4, ComputeBufferType.Default);
	this.csPositionsZ = new ComputeBuffer(this.DataLength, 4, ComputeBufferType.Default);
	
	// ------------  Update
	// Compute Shader
	this.csPositionsX.SetData(this.PositionsX);
	this.csPositionsY.SetData(this.PositionsY);
	this.csPositionsZ.SetData(this.PositionsZ);
	
	this.csFiltering.SetTexture(0, "DispOut", this.csDispOut);
	this.csFiltering.SetTexture(0, "NormOut", this.csNormOut);
	
	this.csFiltering.Dispatch(0, ((int)(this.TextureSize.x)) / 8, ((int)(this.TextureSize.y)) / 8, 1);
	
	RenderTexture.active = this.csDispOut;
	this.displacementTexture.ReadPixels(new Rect(0, 0, (int)this.TextureSize.x, (int)this.TextureSize.y), 0, 0);
	this.displacementTexture.Apply();
	
	
	
	// Compute Shader
	#pragma kernel CSBakeToTexture

	StructuredBuffer<float> PositionsX;
	StructuredBuffer<float> PositionsY;
	StructuredBuffer<float> PositionsZ;
	RWTexture2D<float4> DispOut;

	#define BLOCKSIZE 8

	// Floats to Texture
	[numthreads(BLOCKSIZE, BLOCKSIZE, 1)]
	void CSBakeToTexture (uint3 Gid : SV_GroupID, uint3 DTid : SV_DispatchThreadID, uint3 GTid : SV_GroupThreadID, uint GI : SV_GroupIndex)
	{
		// uint i = (DTid.x * DTid.y) + DTid.x;
                   uint i = (640 * DTid.y) + DTid.x;
		DispOut[uint2(DTid.x, DTid.y)] = float4(PositionsX[i], PositionsY[i], PositionsZ[i], 1);
	}
2

Anyone? I’ve been looking at the examples posted by Aras but there isn’t any for Structured

3

OMG, yeah i totally missed it, i am not setting the buffers to the compute shader :slight_smile: Nevermind… that’s what happens when you work late hours…