CodeWalker/Rendering/Utils/UnitQuad.cs

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C#
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2017-09-21 18:33:05 +08:00
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using SharpDX;
using SharpDX.Direct3D;
using SharpDX.Direct3D11;
using Device = SharpDX.Direct3D11.Device;
using Buffer = SharpDX.Direct3D11.Buffer;
using SharpDX.DXGI;
namespace CodeWalker.Rendering
{
public class UnitQuad
{
public Buffer VertexBuffer { get; set; }
public Buffer IndexBuffer { get; set; }
private VertexBufferBinding vbbinding;
public UnitQuad(Device device, bool invert = false)
{
VertexBuffer = Buffer.Create(device, BindFlags.VertexBuffer, new[]
{
//position (x4), texture (x2)
-1.0f, -1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f, -1.0f, 0.0f, 1.0f, 1.0f, 1.0f,
-1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.0f,
//new Vector4(-1.0f, -1.0f, 0.0f, 1.0f), new Vector4(1.0f, -1.0f, 0.0f, 1.0f),
//new Vector4(-1.0f, 1.0f, 0.0f, 1.0f), new Vector4(1.0f, 1.0f, 0.0f, 1.0f),
//new Vector4(-0.5f, -0.5f, 0.5f, 1.0f), new Vector4(0.5f, -0.5f, 0.5f, 1.0f),
//new Vector4(-0.5f, 0.5f, 0.5f, 1.0f), new Vector4(0.5f, 0.5f, 0.5f, 1.0f),
});
if (invert)
{
IndexBuffer = Buffer.Create(device, BindFlags.IndexBuffer, new[]
{
0u,1u,2u,1u,3u,2u
});
}
else
{
IndexBuffer = Buffer.Create(device, BindFlags.IndexBuffer, new[]
{
0u,2u,1u,1u,2u,3u
});
}
vbbinding = new VertexBufferBinding(VertexBuffer, 24, 0);
}
public void Draw(DeviceContext context)
{
context.InputAssembler.PrimitiveTopology = PrimitiveTopology.TriangleList;
context.InputAssembler.SetVertexBuffers(0, vbbinding);
context.InputAssembler.SetIndexBuffer(IndexBuffer, Format.R32_UInt, 0);
context.DrawIndexed(6, 0, 0);
}
public void DrawInstanced(DeviceContext context, int instcount)
{
context.InputAssembler.PrimitiveTopology = PrimitiveTopology.TriangleList;
context.InputAssembler.SetVertexBuffers(0, vbbinding);
context.InputAssembler.SetIndexBuffer(IndexBuffer, Format.R32_UInt, 0);
context.DrawIndexedInstanced(6, instcount, 0, 0, 0);
}
public void Dispose()
{
if (VertexBuffer != null)
{
VertexBuffer.Dispose();
VertexBuffer = null;
}
if (IndexBuffer != null)
{
IndexBuffer.Dispose();
IndexBuffer = null;
}
}
public InputElement[] GetLayout()
{
return new[]
{
new InputElement("POSITION", 0, Format.R32G32B32A32_Float, 0, 0),
new InputElement("TEXCOORD", 0, Format.R32G32_Float, 16, 0),
};
}
}
}