void CreateDeviceObjects()
{
// set up a commandlist
commandList = context.CommandList;
// compile de shader
imShader = new EffectInstance(effectSystem.LoadEffect("ImGuiShader").WaitForResult());
imShader.UpdateEffect(device);
var layout = new VertexDeclaration(
VertexElement.Position <Vector2>(),
VertexElement.TextureCoordinate <Vector2>(),
VertexElement.Color(PixelFormat.R8G8B8A8_UNorm)
);
imVertLayout = layout;
// de pipeline desc
var pipeline = new PipelineStateDescription()
{
BlendState = BlendStates.NonPremultiplied,
RasterizerState = new RasterizerStateDescription()
{
CullMode = CullMode.None,
DepthBias = 0,
FillMode = FillMode.Solid,
MultisampleAntiAliasLine = false,
ScissorTestEnable = true,
SlopeScaleDepthBias = 0,
},
PrimitiveType = PrimitiveType.TriangleList,
InputElements = imVertLayout.CreateInputElements(),
DepthStencilState = DepthStencilStates.Default,
EffectBytecode = imShader.Effect.Bytecode,
RootSignature = imShader.RootSignature,
Output = new RenderOutputDescription(PixelFormat.R8G8B8A8_UNorm)
};
// finally set up the pipeline
var pipelineState = PipelineState.New(device, ref pipeline);
imPipeline = pipelineState;
var is32Bits = false;
var indexBuffer = Xenko.Graphics.Buffer.Index.New(device, INITIAL_INDEX_BUFFER_SIZE * sizeof(ushort), GraphicsResourceUsage.Dynamic);
var indexBufferBinding = new IndexBufferBinding(indexBuffer, is32Bits, 0);
indexBinding = indexBufferBinding;
var vertexBuffer = Xenko.Graphics.Buffer.Vertex.New(device, INITIAL_VERTEX_BUFFER_SIZE * imVertLayout.CalculateSize(), GraphicsResourceUsage.Dynamic);
var vertexBufferBinding = new VertexBufferBinding(vertexBuffer, layout, 0);
vertexBinding = vertexBufferBinding;
}
static VertexDeclaration GetVertexDeclaration(SimpleMesh mesh)
{
var elements = new List <VertexElement>();
elements.Add(VertexElement.Position <Vector3>());
if (mesh.HasVertexNormals)
{
elements.Add(VertexElement.Normal <Vector3>());
}
if (mesh.HasVertexUVs)
{
elements.Add(VertexElement.TextureCoordinate <Vector2>());
}
if (mesh.HasVertexColors)
{
elements.Add(VertexElement.Color <Color>());
}
return(new VertexDeclaration(elements.ToArray()));
}
private static VertexElement[] CreateElement(VertexShaderFlags flag)
{
switch (flag)
{
case VertexShaderFlags.Position:
return(new[] { VertexElement.Position(Format.R32G32B32_Float) });
case VertexShaderFlags.Normal:
return(new[] { VertexElement.Normal(Format.R32G32B32_Float) });
case VertexShaderFlags.TextureUV:
return(new[] { VertexElement.TextureCoordinate(Format.R32G32_Float) });
case VertexShaderFlags.TextureUVW:
return(new[] { VertexElement.TextureCoordinate(Format.R32G32B32_Float) });
case VertexShaderFlags.Color:
return(new[] { VertexElement.Color(Format.R32G32B32A32_Float) });
case VertexShaderFlags.Tangent:
return(new[] { VertexElement.Tangent(Format.R32G32B32A32_Float) });
case VertexShaderFlags.Barycentric:
return(new[] { new VertexElement("BARYCENTRIC", Format.R32G32B32_Float) });
case VertexShaderFlags.InstanceWorld:
return(new[]
{
new VertexElement("INSTANCEWORLD", 0, Format.R32G32B32A32_Float),
new VertexElement("INSTANCEWORLD", 1, Format.R32G32B32A32_Float),
new VertexElement("INSTANCEWORLD", 2, Format.R32G32B32A32_Float),
new VertexElement("INSTANCEWORLD", 3, Format.R32G32B32A32_Float),
});
default:
throw new ArgumentOutOfRangeException(string.Format("[{0}]: VertexShaderFlag not valid", flag));
}
}
public static (VertexElement, int) ConvertVertexElement(KeyValuePair <string, SharpGLTF.Schema2.Accessor> accessor, int offset)
{
return((accessor.Key, accessor.Value.Format.ByteSize) switch
{
("POSITION", 12) => (VertexElement.Position <Vector3>(0, offset), Vector3.SizeInBytes),
("NORMAL", 12) => (VertexElement.Normal <Vector3>(0, offset), Vector3.SizeInBytes),
("TANGENT", 12) => (VertexElement.Tangent <Vector3>(0, offset), Vector3.SizeInBytes),
("COLOR", 16) => (VertexElement.Color <Vector4>(0, offset), Vector4.SizeInBytes),
("TEXCOORD_0", 8) => (VertexElement.TextureCoordinate <Vector2>(0, offset), Vector2.SizeInBytes),
("TEXCOORD_1", 8) => (VertexElement.TextureCoordinate <Vector2>(1, offset), Vector2.SizeInBytes),
("TEXCOORD_2", 8) => (VertexElement.TextureCoordinate <Vector2>(2, offset), Vector2.SizeInBytes),
("TEXCOORD_3", 8) => (VertexElement.TextureCoordinate <Vector2>(3, offset), Vector2.SizeInBytes),
("TEXCOORD_4", 8) => (VertexElement.TextureCoordinate <Vector2>(4, offset), Vector2.SizeInBytes),
("TEXCOORD_5", 8) => (VertexElement.TextureCoordinate <Vector2>(5, offset), Vector2.SizeInBytes),
("TEXCOORD_6", 8) => (VertexElement.TextureCoordinate <Vector2>(6, offset), Vector2.SizeInBytes),
("TEXCOORD_7", 8) => (VertexElement.TextureCoordinate <Vector2>(7, offset), Vector2.SizeInBytes),
("TEXCOORD_8", 8) => (VertexElement.TextureCoordinate <Vector2>(8, offset), Vector2.SizeInBytes),
("TEXCOORD_9", 8) => (VertexElement.TextureCoordinate <Vector2>(9, offset), Vector2.SizeInBytes),
("JOINTS_0", 8) => (new VertexElement(VertexElementUsage.BlendIndices, 0, PixelFormat.R16G16B16A16_UInt, offset), 8),
("JOINTS_0", 4) => (new VertexElement(VertexElementUsage.BlendIndices, 0, PixelFormat.R8G8B8A8_UInt, offset), 4),
("WEIGHTS_0", 16) => (new VertexElement(VertexElementUsage.BlendWeight, 0, PixelFormat.R32G32B32A32_Float, offset), Vector4.SizeInBytes),
_ => throw new NotImplementedException(),
});
protected override async Task LoadContent()
{
await base.LoadContent();
var vertices = new Vertex[4];
vertices[0] = new Vertex {
Position = new Vector3(-1, -1, 0.5f), TexCoords = new Vector2(0, 0)
};
vertices[1] = new Vertex {
Position = new Vector3(-1, 1, 0.5f), TexCoords = new Vector2(3, 0)
};
vertices[2] = new Vertex {
Position = new Vector3(1, 1, 0.5f), TexCoords = new Vector2(3, 3)
};
vertices[3] = new Vertex {
Position = new Vector3(1, -1, 0.5f), TexCoords = new Vector2(0, 3)
};
var indices = new short[] { 0, 1, 2, 0, 2, 3 };
var vertexBuffer = Buffer.Vertex.New(GraphicsDevice, vertices, GraphicsResourceUsage.Default);
var indexBuffer = Buffer.Index.New(GraphicsDevice, indices, GraphicsResourceUsage.Default);
var meshDraw = new MeshDraw
{
DrawCount = 4,
PrimitiveType = PrimitiveType.TriangleList,
VertexBuffers = new[]
{
new VertexBufferBinding(vertexBuffer,
new VertexDeclaration(VertexElement.Position <Vector3>(),
VertexElement.TextureCoordinate <Vector2>()),
4)
},
IndexBuffer = new IndexBufferBinding(indexBuffer, false, indices.Length),
};
var mesh = new Mesh
{
Draw = meshDraw,
};
simpleEffect = new Effect(GraphicsDevice, SpriteEffect.Bytecode);
parameterCollection = new ParameterCollection();
parameterCollectionGroup = new EffectParameterCollectionGroup(GraphicsDevice, simpleEffect, new[] { parameterCollection });
parameterCollection.Set(TexturingKeys.Texture0, UVTexture);
vao = VertexArrayObject.New(GraphicsDevice, mesh.Draw.IndexBuffer, mesh.Draw.VertexBuffers);
myDraws = new DrawOptions[3];
myDraws[0] = new DrawOptions {
Sampler = GraphicsDevice.SamplerStates.LinearClamp, Transform = Matrix.Multiply(Matrix.Scaling(0.4f), Matrix.Translation(-0.5f, 0.5f, 0f))
};
myDraws[1] = new DrawOptions {
Sampler = GraphicsDevice.SamplerStates.LinearWrap, Transform = Matrix.Multiply(Matrix.Scaling(0.4f), Matrix.Translation(0.5f, 0.5f, 0f))
};
myDraws[2] = new DrawOptions {
Sampler = SamplerState.New(GraphicsDevice, new SamplerStateDescription(TextureFilter.Linear, TextureAddressMode.Mirror)), Transform = Matrix.Multiply(Matrix.Scaling(0.4f), Matrix.Translation(0.5f, -0.5f, 0f))
};
//var borderDescription = new SamplerStateDescription(TextureFilter.Linear, TextureAddressMode.Border) { BorderColor = Color.Purple };
//var border = SamplerState.New(GraphicsDevice, borderDescription);
//myDraws[3] = new DrawOptions { Sampler = border, Transform = Matrix.Multiply(Matrix.Scale(0.3f), Matrix.Translation(-0.5f, -0.5f, 0f)) };
}
private ModelData.MeshPart Process(ModelData.Mesh mesh, Mesh assimpMesh)
{
var meshPart = new ModelData.MeshPart
{
PrimitiveTopology = PrimitiveTopology.TriangleList,
VertexBufferRange = new ModelData.BufferRange {
Slot = mesh.VertexBuffers.Count
},
IndexBufferRange = new ModelData.BufferRange {
Slot = mesh.IndexBuffers.Count
}
};
var vertexBuffer = new ModelData.VertexBuffer
{
Layout = new List <VertexElement>()
};
mesh.VertexBuffers.Add(vertexBuffer);
var indexBuffer = new ModelData.IndexBuffer();
mesh.IndexBuffers.Add(indexBuffer);
var layout = vertexBuffer.Layout;
int vertexBufferElementSize = 0;
// Add position
layout.Add(VertexElement.PositionTransformed(Format.R32G32B32_Float, 0));
vertexBufferElementSize += SharpDX.Utilities.SizeOf <Vector3>();
// Add normals
if (assimpMesh.HasNormals)
{
layout.Add(VertexElement.Normal(0, Format.R32G32B32_Float, vertexBufferElementSize));
vertexBufferElementSize += SharpDX.Utilities.SizeOf <Vector3>();
}
// Add colors
if (assimpMesh.VertexColorChannelCount > 0)
{
for (int localIndex = 0, i = 0; i < assimpMesh.VertexColorChannelCount; i++)
{
if (assimpMesh.HasVertexColors(i))
{
layout.Add(VertexElement.Normal(localIndex, Format.R32G32B32A32_Float, vertexBufferElementSize));
vertexBufferElementSize += SharpDX.Utilities.SizeOf <Color4>();
localIndex++;
}
}
}
// Add textures
if (assimpMesh.TextureCoordsChannelCount > 0)
{
for (int localIndex = 0, i = 0; i < assimpMesh.TextureCoordsChannelCount; i++)
{
if (assimpMesh.HasTextureCoords(i))
{
var uvCount = assimpMesh.GetUVComponentCount(i);
if (uvCount == 2)
{
layout.Add(VertexElement.TextureCoordinate(localIndex, Format.R32G32_Float, vertexBufferElementSize));
vertexBufferElementSize += SharpDX.Utilities.SizeOf <Vector2>();
}
else if (uvCount == 3)
{
layout.Add(VertexElement.TextureCoordinate(localIndex, Format.R32G32B32_Float, vertexBufferElementSize));
vertexBufferElementSize += SharpDX.Utilities.SizeOf <Vector3>();
}
else
{
throw new InvalidOperationException("Unexpected uv count");
}
localIndex++;
}
}
}
if (options.ModelOperations.HasFlag(ModelOperation.CalculateBarycentricCoordinates))
{
layout.Add(new VertexElement("BARYCENTRIC", 0, Format.R32G32B32_Float, vertexBufferElementSize));
vertexBufferElementSize += SharpDX.Utilities.SizeOf <Vector3>();
}
else
// Add tangent / bitangent
if (assimpMesh.HasTangentBasis)
{
if (!options.ExcludeElements.Contains("Tangent"))
{
layout.Add(VertexElement.Tangent(Format.R32G32B32A32_Float, vertexBufferElementSize));
vertexBufferElementSize += SharpDX.Utilities.SizeOf <Vector4>();
}
if (!options.ExcludeElements.Contains("BiTangent"))
{
layout.Add(VertexElement.BiTangent(Format.R32G32B32_Float, vertexBufferElementSize));
vertexBufferElementSize += SharpDX.Utilities.SizeOf <Vector3>();
}
}
if (options.ModelOperations.HasFlag(ModelOperation.CalculateBarycentricCoordinates))
{
WriteBarycentricVertices(assimpMesh, meshPart, vertexBuffer, vertexBufferElementSize);
}
else
{
WriteVertices(assimpMesh, meshPart, vertexBuffer, vertexBufferElementSize);
}
WriteIndices(assimpMesh, meshPart, indexBuffer);
return(meshPart);
}