Hello,
I am, like many others before me, making a displacement map tesselator. I want render some terrain using a quad, a texture containing heightdata and the geometryshader/tesselator.
So far, Ive managed the utilize the texture on the pixelshader (I return different colors depending on the height). I have also managed to tesselate my surface, i.e. subdivided my quad into lots of triangles .
What doesnt work however is the sampling step on the domain shader. I want to offset the vertices using the heightmap.
I tried calling the same function "textureMap.Sample(textureSampler, texcoord)" as on the pixelshader but got compiling errors. Instead I am now using the "SampleLevel" function to use the 0 mipmap version of the input texture.
But yeah non of this seem to be working. I wont get anything except [0, 0, 0, 0] from my sampler.
Below is some code: The working pixelshader, the broken domain shader where I want to sample, and the instanciations of the samplerstates on the CPU side.
Been stuck on this for a while! Any help would be much appreciated!
Texture2D textureMap: register(t0);
SamplerState textureSampler : register(s0);
//Pixel shader
float4 PS(PS_IN input) : SV_TARGET
{
float4 textureColor = textureMap.Sample(textureSampler, input.texcoord);
return textureColor;
}
GS_IN DS(HS_CONSTANT_DATA input, float3 uvwCoord : SV_DomainLocation, const OutputPatch<DS_IN, 3> patch)
{
GS_IN output;
float2 texcoord = uvwCoord.x * patch[0].texcoord.xy + uvwCoord.y * patch[1].texcoord.xy + uvwCoord.z * patch[2].texcoord.xy;
float4 textureColor = textureMap.SampleLevel(textureSampler, texcoord.xy, 0);
//fill and return output....
}
//Sampler
SharpDX.Direct3D11.SamplerStateDescription samplerDescription;
samplerDescription = SharpDX.Direct3D11.SamplerStateDescription.Default();
samplerDescription.Filter = SharpDX.Direct3D11.Filter.MinMagMipLinear;
samplerDescription.AddressU = SharpDX.Direct3D11.TextureAddressMode.Wrap;
samplerDescription.AddressV = SharpDX.Direct3D11.TextureAddressMode.Wrap;
this.samplerStateTextures = new SharpDX.Direct3D11.SamplerState(d3dDevice, samplerDescription);
d3dDeviceContext.PixelShader.SetSampler(0, samplerStateTextures);
d3dDeviceContext.VertexShader.SetSampler(0, samplerStateTextures);
d3dDeviceContext.HullShader.SetSampler(0, samplerStateTextures);
d3dDeviceContext.DomainShader.SetSampler(0, samplerStateTextures);
d3dDeviceContext.GeometryShader.SetSampler(0, samplerStateTextures);
