public MeshDeviceResources(Device device, SharpDX.WIC.ImagingFactory2 imagingFactory, Mesh mesh)
{
this.mesh = mesh;
// create single vertex buffer
var stream = new DataStream(mesh.vertices.Count * Mesh.VertexPositionNormalTexture.sizeInBytes, true, true);
stream.WriteRange(mesh.vertices.ToArray());
stream.Position = 0;
var vertexBufferDesc = new BufferDescription()
{
BindFlags = BindFlags.VertexBuffer,
CpuAccessFlags = CpuAccessFlags.None,
Usage = ResourceUsage.Default,
SizeInBytes = mesh.vertices.Count * Mesh.VertexPositionNormalTexture.sizeInBytes,
};
vertexBuffer = new SharpDX.Direct3D11.Buffer(device, stream, vertexBufferDesc);
stream.Dispose();
vertexBufferBinding = new VertexBufferBinding(vertexBuffer, Mesh.VertexPositionNormalTexture.sizeInBytes, 0);
foreach (var subset in mesh.subsets)
{
if (subset.material.textureFilename != null)
{
var decoder = new SharpDX.WIC.BitmapDecoder(imagingFactory, subset.material.textureFilename, SharpDX.WIC.DecodeOptions.CacheOnLoad);
var bitmapFrameDecode = decoder.GetFrame(0);
var stagingTextureDesc = new Texture2DDescription()
{
Width = bitmapFrameDecode.Size.Width,
Height = bitmapFrameDecode.Size.Height,
MipLevels = 1,
ArraySize = 1,
Format = SharpDX.DXGI.Format.B8G8R8A8_UNorm,
SampleDescription = new SharpDX.DXGI.SampleDescription(1, 0),
Usage = ResourceUsage.Dynamic,
BindFlags = BindFlags.ShaderResource,
CpuAccessFlags = CpuAccessFlags.Write
};
var stagingTexture = new Texture2D(device, stagingTextureDesc);
var textureDesc = new Texture2DDescription()
{
Width = bitmapFrameDecode.Size.Width,
Height = bitmapFrameDecode.Size.Height,
MipLevels = 0,
ArraySize = 1,
Format = SharpDX.DXGI.Format.B8G8R8A8_UNorm,
SampleDescription = new SharpDX.DXGI.SampleDescription(1, 0),
Usage = ResourceUsage.Default,
BindFlags = BindFlags.ShaderResource | BindFlags.RenderTarget,
CpuAccessFlags = CpuAccessFlags.None,
OptionFlags = ResourceOptionFlags.GenerateMipMaps
};
var texture = new Texture2D(device, textureDesc);
// convert to 32 bpp
var formatConverter = new FormatConverter(imagingFactory);
formatConverter.Initialize(bitmapFrameDecode, SharpDX.WIC.PixelFormat.Format32bppBGR);
var dataBox = device.ImmediateContext.MapSubresource(stagingTexture, 0, MapMode.WriteDiscard, SharpDX.Direct3D11.MapFlags.None);
formatConverter.CopyPixels(dataBox.RowPitch, dataBox.DataPointer, dataBox.RowPitch * bitmapFrameDecode.Size.Height);
device.ImmediateContext.UnmapSubresource(stagingTexture, 0);
var resourceRegion = new ResourceRegion()
{
Left = 0,
Top = 0,
Right = bitmapFrameDecode.Size.Width,
Bottom = bitmapFrameDecode.Size.Height,
Front = 0,
Back = 1,
};
device.ImmediateContext.CopySubresourceRegion(stagingTexture, 0, resourceRegion, texture, 0);
var textureRV = new ShaderResourceView(device, texture);
device.ImmediateContext.GenerateMips(textureRV);
decoder.Dispose();
formatConverter.Dispose();
bitmapFrameDecode.Dispose();
textureRVs[subset] = textureRV;
}
}
}
public static Mesh FromOBJFile(string filename)
{
var mesh = new Mesh();
mesh.LoadFromOBJFile(filename);
return mesh;
}
public unsafe void SetPixelShaderConstants(DeviceContext deviceContext, Mesh.Material material, PointLight light)
{
// hlsl matrices are default column order
var constants = new PSConstantBuffer();
for (int i = 0; i < 3; i++)
{
constants.Ka[i] = material.ambientColor[i];
constants.Kd[i] = material.diffuseColor[i];
constants.Ks[i] = material.specularColor[i];
constants.Ia[i] = light.Ia[i];
constants.Id[i] = light.Id[i];
constants.Is[i] = light.Is[i];
}
constants.Ns = material.shininess;
// TODO: add camera position
DataStream dataStream;
deviceContext.MapSubresource(pixelShaderConstantBuffer, MapMode.WriteDiscard, SharpDX.Direct3D11.MapFlags.None, out dataStream);
dataStream.Write<PSConstantBuffer>(constants);
deviceContext.UnmapSubresource(pixelShaderConstantBuffer, 0);
}