40 lines
3.0 KiB
Markdown
40 lines
3.0 KiB
Markdown
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# HD Sample Buffer Node
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## Description
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The HD Sample Buffer Node samples a buffer directly from the Camera.
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## Render pipeline compatibility
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| **Node** | **Universal Render Pipeline (URP)** | **High Definition Render Pipeline (HDRP)** |
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| -------------------- | ----------------------------------- | ------------------------------------------ |
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| **HD Sample Buffer** | No | Yes |
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## Ports
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| **Name** | **Direction** | **Type** | **Binding** | **Description** |
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| ----------------- | ------------- | ------------------------------------------------------------ | ----------- | ------------------------------------------------------------ |
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| **UV** | Input | Vector 2 | UV | Input UV value. |
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| **Sampler** | Input | SamplerState | None | Determines the sampler that Unity uses to sample the buffer. |
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| **Layer Mask** | Input | Float | None | Set the number of the Layer to sample. This port appears when you select **Thickness** in the **Source Buffer** dropdown. |
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| **Output** | Output | Changes to one of the following depending on the Source Buffer you select:<br/>• Float<br/>• Vector 2<br/>• Vector 3<br/>• Vector 4 | None | Output value. |
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| **Thickness** | Output | Float | None | Sample the Worldspace value, in meters, between the near and the far plane of the camera.This port appears when you select **Thickness** in the **Source Buffer** dropdown. |
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| **Overlap Count** | Output | Float | None | Count the number of triangles for a given pixel. This is useful for vegetation or flat surfaces.<br/>This port appears when you select **Thickness** in the **Source Buffer** dropdown. |
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## Controls
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| **Name** | **Type** | **Options** | **Description** |
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| ----------------- | -------- | ------------------------------------------------------------ | ---------------------------------- |
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| **Source Buffer** | Dropdown | • NormalWorldSpace<br>• Smoothness<br/>• MotionVectors<br/>• IsSky<br/>• PostProcessInput<br/>• RenderingLayerMask<br/>• Thickness | Determines which buffer to sample. |
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## Generated Code Example
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The following example code represents one possible outcome of this node:
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```c#
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float4 Unity_HDRP_SampleBuffer_float(float2 uv, SamplerState samplerState)
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{
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return SAMPLE_TEXTURE2D_X_LOD(_CustomPostProcessInput, samplerState, uv * _RTHandlePostProcessScale.xy, 0);
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}
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```
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