/// <summary>
/// Initializes a new instance of the <see cref="Sobel"/> class.
/// </summary>
/// <param name="graphics">The graphics interface to use.</param>
/// <param name="sobelShader">The shader for sobel edge detection.</param>
/// <exception cref="ArgumentNullException">Thrown when the <paramref name="graphics"/>, or the <paramref name="sobelShader"/> parameter is <b>null</b>.</exception>
public Sobel(GorgonGraphics graphics, GorgonComputeShader sobelShader)
{
if (sobelShader == null)
{
throw new ArgumentNullException(nameof(sobelShader));
}
_compute = new GorgonComputeEngine(graphics);
_sobelData = new GorgonConstantBuffer(graphics,
new GorgonConstantBufferInfo("SobelData")
{
Usage = ResourceUsage.Dynamic,
SizeInBytes = 16
});
_dispatchBuilder = new GorgonDispatchCallBuilder();
_dispatchBuilder.ConstantBuffer(_sobelData.GetView())
.ComputeShader(sobelShader);
}
/// <summary>
/// Function used to build the resources required by the volume renderer.
/// </summary>
public void CreateResources()
{
_cubeVs = GorgonShaderFactory.Compile <GorgonVertexShader>(_graphics, Resources.VolumeRenderShaders, "VolumeVS", true);
_cubePosShader = GorgonShaderFactory.Compile <GorgonPixelShader>(_graphics, Resources.VolumeRenderShaders, "VolumePositionPS", true);
_cubeDirShader = GorgonShaderFactory.Compile <GorgonPixelShader>(_graphics, Resources.VolumeRenderShaders, "VolumeRayCastPS", true);
_inputLayout = GorgonInputLayout.CreateUsingType <CubeVertex>(_graphics, _cubeVs);
_cube = new Cube(_graphics, _inputLayout);
_cubeTransform = new GorgonConstantBuffer(_graphics, new GorgonConstantBufferInfo
{
SizeInBytes = DX.Matrix.SizeInBytes
});
_volumeRayParams = new GorgonConstantBuffer(_graphics, new GorgonConstantBufferInfo
{
SizeInBytes = Unsafe.SizeOf <VolumeRayParameters>()
});
_volumeScaleFactor = new GorgonConstantBuffer(_graphics, new GorgonConstantBufferInfo
{
SizeInBytes = DX.Vector4.SizeInBytes
});
// Our camera is never changing, so we only need to define it here.
DX.Matrix.Translation(0, 0, 1.5f, out _view);
ResizeRenderRegion();
UpdateCubeTransform();
var pipelineBuilder = new GorgonPipelineStateBuilder(_graphics);
var drawBuilder = new GorgonDrawIndexCallBuilder();
pipelineBuilder
.PixelShader(_cubePosShader)
.VertexShader(_cubeVs);
// Position draw calls.
_cubePosDrawCull = drawBuilder
.ConstantBuffer(ShaderType.Vertex, _cubeTransform.GetView())
.ConstantBuffer(ShaderType.Vertex, _volumeScaleFactor.GetView(), 1)
.PipelineState(pipelineBuilder)
.IndexBuffer(_cube.IndexBuffer, indexCount: _cube.IndexBuffer.IndexCount)
.VertexBuffer(_inputLayout, _cube.VertexBuffer[0])
.Build();
pipelineBuilder
.RasterState(GorgonRasterState.CullFrontFace);
_cubePosDrawFrontCull = drawBuilder
.PipelineState(pipelineBuilder)
.Build();
// Raycasting draw call.
pipelineBuilder
.PixelShader(_cubeDirShader)
.RasterState(GorgonRasterState.Default);
_cubeDirDrawCall = drawBuilder
.ConstantBuffer(ShaderType.Pixel, _volumeRayParams.GetView(), 0)
.PipelineState(pipelineBuilder)
.Build();
}