95 lines
3.1 KiB
C#
95 lines
3.1 KiB
C#
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namespace Environment.Instancing
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{
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using UnityEngine;
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using System.Runtime.InteropServices;
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using System.Collections.Generic;
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using System.Linq;
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/// <summary>
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/// Data as seen on GPU. Exact same struct should be defined there.
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/// </summary>
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public struct InstanceData
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{
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public Matrix4x4 TRS;
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public Vector3 Normal;
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}
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/// <summary>
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/// Contains the needed bakend information for instancing with Graphics.RenderMeshIndirect().
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/// </summary>
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public class InstancingConfiguration
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{
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public Mesh Mesh;
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public Material Material;
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public MaterialPropertyBlock MaterialPropertyBlock;
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public ComputeBuffer CommandBuffer;
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public ComputeBuffer DataBuffer;
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/// <summary>
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/// Initializes new instancing information.
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/// </summary>
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public InstancingConfiguration(InstancingSettings settings, IEnumerable<InstanceData> data, string shaderBufferParameter)
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{
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this.Mesh = settings.Mesh;
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this.Material = settings.Material;
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this.DataBuffer = new ComputeBuffer(data.Count(), Marshal.SizeOf<InstanceData>());
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this.DataBuffer.SetData(data.ToArray());
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var commandArguments = new uint[5];
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commandArguments[0] = settings.Mesh.GetIndexCount(0);
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commandArguments[1] = (uint)data.Count();
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this.CommandBuffer = new ComputeBuffer(5, sizeof(uint), ComputeBufferType.IndirectArguments);
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this.CommandBuffer.SetData(commandArguments);
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this.MaterialPropertyBlock = new MaterialPropertyBlock();
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this.MaterialPropertyBlock.SetBuffer(shaderBufferParameter, this.DataBuffer);
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}
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/// <summary>
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/// Frees the memory of this configuration from the GPU.
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/// </summary>
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public void FreeMemory()
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{
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this.CommandBuffer?.Release();
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this.CommandBuffer = null;
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this.DataBuffer?.Release();
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this.DataBuffer = null;
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}
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}
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}
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/*
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* if Unity ever supports Graphics.RenderMeshIndirect() with Shader Graph shaded instances. This can be used to upgrade.
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namespace Environment.Instancing
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{
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using UnityEngine;
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using System.Runtime.InteropServices;
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/// <summary>
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/// Contains the needed bakend information for instancing with Graphics.RenderMeshIndirect().
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/// </summary>
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public class InstancingInfo<T>
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{
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public GraphicsBuffer GraphicsBuffer;
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public MaterialPropertyBlock MaterialPropertyBlock;
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/// <summary>
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/// Initializes new instancing information.
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/// </summary>
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public InstancingInfo(T[] data, string shaderBufferParameter)
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{
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// For structured graphics buffer there has to be an equivalnt struct in hlsl
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this.GraphicsBuffer = new GraphicsBuffer(GraphicsBuffer.Target.Structured, data.Length, Marshal.SizeOf<T>());
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this.MaterialPropertyBlock = new MaterialPropertyBlock();
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this.MaterialPropertyBlock.SetBuffer(shaderBufferParameter, this.GraphicsBuffer);
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}
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}
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}
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*/
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