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https://github.com/Facepunch/sbox-public.git
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5cbff413b4
Adds GPU culling Fixed collision not working for painted instances LOD is selected on the GPU now Improvements on our benchmark: 32ms down to 8ms in some cases
32 lines
1019 B
C#
32 lines
1019 B
C#
using System.Runtime.InteropServices;
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namespace Sandbox.Rendering;
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/// <summary>
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/// GPU instance transform - matches TransformBufferData_t in transform_buffer.fxc. Feed a buffer of
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/// these to <see cref="Graphics.DrawModelInstancedIndirect(Model, GpuBuffer, GpuBuffer, int, int, RenderAttributes)"/>.
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/// </summary>
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[StructLayout( LayoutKind.Sequential )]
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public struct GpuInstanceTransform
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{
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public Vector4 Row0, Row1, Row2; // row-major float3x4
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public float Alpha;
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public uint Tint;
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public uint VertexCacheOffset;
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public uint BlendWeightCount;
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public static GpuInstanceTransform From( Transform transform )
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{
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// transposed - the instancing path does mul( matrix, position )
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var m = System.Numerics.Matrix4x4.Transpose( Matrix.FromTransform( transform ) );
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return new GpuInstanceTransform
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{
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Row0 = new Vector4( m.M11, m.M12, m.M13, m.M14 ),
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Row1 = new Vector4( m.M21, m.M22, m.M23, m.M24 ),
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Row2 = new Vector4( m.M31, m.M32, m.M33, m.M34 ),
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Alpha = 1.0f,
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Tint = 0xFFFFFF,
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};
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}
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}
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