SharpDX 4.2 - Access Texture1D data inside VertexShader Hi, This is a continuation of the project found here: Now that I was able to modify the positions of the vertex in a Vertex Shader through Vertex Bindings, I need to be able to nullify the triangles/vertex that aren't needed in the scene. In order to do that, I had multiple options: Option 1: Create a ByteMap and send the data through a constant buffer inside of a geometry shader. The ByteMap wouldn't consist of the same ByteMap as I am sending through the vertexShader. It would consist again of 0's and 1's but each vertex NOT at an extremity of a chunk would be nullified in a Geometry shader, if that is even possible. I have tried this option and it failed as I do not know how to properly send the byteMap through a constant buffer. Option 2: Create a Texture1D and access the Texture1D from within the VertexShader and THEN transfer the code to a Geometry shader if it works. I am currently trying this iteration but I am failing and need help. Here's what I got so far: THIS CODE IS CREATING THE TEXTURE1D with the BYTEMAP. int totalWidth = SC_Globals.tinyChunkWidth * SC_Globals.tinyChunkHeight * SC_Globals.tinyChunkDepth * SC_Globals.numberOfInstancesPerObjectInWidth * SC_Globals.numberOfInstancesPerObjectInHeight * SC_Globals.numberOfInstancesPerObjectInDepth; Texture1DDescription desc = new Texture1DDescription(); desc.Width = totalWidth; desc.MipLevels = 1; desc.ArraySize = 1; desc.Format = Format.B8G8R8A8_UNorm; desc.Usage = ResourceUsage.Default; desc.BindFlags = BindFlags.ShaderResource; desc.CpuAccessFlags = CpuAccessFlags.None; desc.OptionFlags = ResourceOptionFlags.None; int[] byteMap = chunkdat.arrayOfSomeMap.SelectMany(a => a).ToArray(); byte[] arrayOfBytes = new byte[byteMap.Length]; for (int i = 0; i < byteMap.Length; i++) { arrayOfBytes[i] = (byte)byteMap[i]; } int rowPitch = 4 * desc.Width; DataStream dataStream = new DataStream(rowPitch, true, true); dataStream.WriteRange(arrayOfBytes, 0, arrayOfBytes.Length); DataBox data = new DataBox(dataStream.DataPointer, rowPitch, rowPitch); DataBox[] arrayOfBoxes = new DataBox[1]; arrayOfBoxes[0] = data; Texture1D mapTexture = new Texture1D(device, desc, arrayOfBoxes); textureView = new ShaderResourceView(device, mapTexture); Inside of the Vertex Shader, I am trying to get the arrayOfBytes data OUT of the Texture1D like this: int x = input.indexPos.x; int y = input.indexPos.y; int z = input.indexPos.z; int currentIndex = x + (tinyChunkWidth * (y + (tinyChunkHeight * z))); int mainX = input.instancePosition1.x % 4; int mainY = input.instancePosition1.y % 4; int mainZ = input.instancePosition1.z % 4; int indexMain = mainX + mapWidth *( mainY + mapHeight * mainZ); int indexTotal = (indexMain * 64) + (currentIndex); float colordata = mapTexture[indexTotal]; // doesn't work float colordata = mapTexture.Load(indexTotal); // doesn't work But it doesn't work. I have found a good list of websites for information on how to do it but none works. Here are the references I found: http://bit.ly/2V3Xeyq http://bit.ly/2KQZWmK http://bit.ly/2BlJLEa Thank you for the help, ninekorn aka Steve Chassé https://ift.tt/eA8V8J

Hi, This is a continuation of the project found here: Now that I was able to modify the positions of the vertex in a Vertex Shader through Vertex Bindings, I need to be able to nullify the triangles/vertex that aren't needed in the scene. In order to do that, I had multiple options: Option 1: Create a ByteMap and send the data through a constant buffer inside of a geometry shader. The ByteMap wouldn't consist of the same ByteMap as I am sending through the vertexShader. It would consist again of 0's and 1's but each vertex NOT at an extremity of a chunk would be nullified in a Geometry shader, if that is even possible. I have tried this option and it failed as I do not know how to properly send the byteMap through a constant buffer. Option 2: Create a Texture1D and access the Texture1D from within the VertexShader and THEN transfer the code to a Geometry shader if it works. I am currently trying this iteration but I am failing and need help. Here's what I got so far: THIS CODE IS CREATING THE TEXTURE1D with the BYTEMAP. int totalWidth = SC_Globals.tinyChunkWidth * SC_Globals.tinyChunkHeight * SC_Globals.tinyChunkDepth * SC_Globals.numberOfInstancesPerObjectInWidth * SC_Globals.numberOfInstancesPerObjectInHeight * SC_Globals.numberOfInstancesPerObjectInDepth; Texture1DDescription desc = new Texture1DDescription(); desc.Width = totalWidth; desc.MipLevels = 1; desc.ArraySize = 1; desc.Format = Format.B8G8R8A8_UNorm; desc.Usage = ResourceUsage.Default; desc.BindFlags = BindFlags.ShaderResource; desc.CpuAccessFlags = CpuAccessFlags.None; desc.OptionFlags = ResourceOptionFlags.None; int[] byteMap = chunkdat.arrayOfSomeMap.SelectMany(a => a).ToArray(); byte[] arrayOfBytes = new byte[byteMap.Length]; for (int i = 0; i < byteMap.Length; i++) { arrayOfBytes[i] = (byte)byteMap[i]; } int rowPitch = 4 * desc.Width; DataStream dataStream = new DataStream(rowPitch, true, true); dataStream.WriteRange(arrayOfBytes, 0, arrayOfBytes.Length); DataBox data = new DataBox(dataStream.DataPointer, rowPitch, rowPitch); DataBox[] arrayOfBoxes = new DataBox[1]; arrayOfBoxes[0] = data; Texture1D mapTexture = new Texture1D(device, desc, arrayOfBoxes); textureView = new ShaderResourceView(device, mapTexture); Inside of the Vertex Shader, I am trying to get the arrayOfBytes data OUT of the Texture1D like this: int x = input.indexPos.x; int y = input.indexPos.y; int z = input.indexPos.z; int currentIndex = x + (tinyChunkWidth * (y + (tinyChunkHeight * z))); int mainX = input.instancePosition1.x % 4; int mainY = input.instancePosition1.y % 4; int mainZ = input.instancePosition1.z % 4; int indexMain = mainX + mapWidth *( mainY + mapHeight * mainZ); int indexTotal = (indexMain * 64) + (currentIndex); float colordata = mapTexture[indexTotal]; // doesn't work float colordata = mapTexture.Load(indexTotal); // doesn't work But it doesn't work. I have found a good list of websites for information on how to do it but none works. Here are the references I found: http://bit.ly/2V3Xeyq http://bit.ly/2KQZWmK http://bit.ly/2BlJLEa Thank you for the help, ninekorn aka Steve Chassé

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