44 lines
1.2 KiB
Markdown
44 lines
1.2 KiB
Markdown
|
## Shader
|
|||
|
|
- RWStructuredBuffer:可读写，可用类型float1234、uint1234
|
|||
|
|
- StructuredBuffer:对应的只读BUffer
|
|||
|
|
|
|||
|
|
## C#脚本
|
|||
|
|
### 声明变量
|
|||
|
|
CS与Buffer
|
|||
|
|
```c#
|
|||
|
|
[SerializeField]
|
|||
|
|
ComputeShader computeShader = default;
|
|||
|
|
|
|||
|
|
ComputeBuffer positionBuffer;
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
### 绑定CS中的变量并且执行
|
|||
|
|
声明Shader中变量id以用于绑定
|
|||
|
|
```c#
|
|||
|
|
static readonly int intpositionsId = Shader.PropertyToID("_Positions"),
|
|||
|
|
resolutionId= Shader.PropertyToID("_Resolution"),
|
|||
|
|
stepId= Shader.PropertyToID("_Step"),
|
|||
|
|
timeId= Shader.PropertyToID("_Time");
|
|||
|
|
```
|
|||
|
|
给变量绑定数值
|
|||
|
|
```c#
|
|||
|
|
computeShader.SetInt(resolutionId, resolution);
|
|||
|
|
computeShader.SetFloat(stepId, step);
|
|||
|
|
computeShader.SetFloat(timeId, Time.time);
|
|||
|
|
computeShader.SetBuffer(0, positionsId, positionBuffer);
|
|||
|
|
```
|
|||
|
|
执行
|
|||
|
|
```c#
|
|||
|
|
int groups = Mathf.CeilToInt(resolution / 8f);
|
|||
|
|
computeShader.Dispatch(0, groups, groups, 1);
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
### 绘制GPU Instance命令
|
|||
|
|
```c#
|
|||
|
|
//需要传入边界盒以及绘制数量
|
|||
|
|
var bounds=new Bounds(Vector3.zero,Vector3.one*(2f+2f/resolution));
|
|||
|
|
Graphics.DrawMeshInstancedProcedural(mesh, 0, material,bounds,positionBuffer.count);
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
### 多kernel
|
|||
|
|
CS可能拥有多个内核函数，此时computeShader的SetBuffer()与Dispatch()，可以通过第一个形参来设置kernel index。
|