unity runtime_error ai_generated true

ArgumentException: Buffer 'position' has format 'Float3' but buffer 'position' expects format 'Float4'.

ID: unity/graphics-buffer-format-mismatch

Also available as: JSON · Markdown · 中文
85%Fix Rate
85%Confidence
1Evidence
2023-06-15First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
Unity 2022.3.0f1 active — — —
Unity 2023.1.0a1 active — — —
Unity 6000.0.0b1 active — — —

Root Cause

A compute shader or graphics API buffer binding has mismatched element size or format between the buffer declaration and the shader/script that reads it.

generic

中文

计算着色器或图形 API 缓冲区绑定中，缓冲区声明与读取它的着色器/脚本之间的元素大小或格式不匹配。

Official Documentation

https://docs.unity3d.com/Manual/class-ComputeShader.html

Workarounds

  1. 85% success Ensure the C# buffer declaration matches the shader struct. For example, if shader expects `float4 position`, declare `ComputeBuffer` with stride = sizeof(float) * 4 and use a struct with `Vector4 position`. Then update the SetBuffer call accordingly. 
    Ensure the C# buffer declaration matches the shader struct. For example, if shader expects `float4 position`, declare `ComputeBuffer` with stride = sizeof(float) * 4 and use a struct with `Vector4 position`. Then update the SetBuffer call accordingly.
  2. 75% success Use `System.Runtime.InteropServices.Marshal.SizeOf` to compute stride dynamically based on the struct definition to avoid manual errors. 
    Use `System.Runtime.InteropServices.Marshal.SizeOf` to compute stride dynamically based on the struct definition to avoid manual errors.

中文步骤

  1. 确保 C# 缓冲区声明与着色器结构体匹配。例如，如果着色器期望 `float4 position`，则使用 stride = sizeof(float) * 4 声明 `ComputeBuffer`，并使用包含 `Vector4 position` 的结构体。然后相应更新 SetBuffer 调用。
  2. 使用 `System.Runtime.InteropServices.Marshal.SizeOf` 根据结构体定义动态计算 stride，以避免手动错误。

Dead Ends

Common approaches that don't work:

  1. 70% fail

    Changing buffer stride without updating shader declarations often leads to data corruption or different errors.

  2. 90% fail

    Reimporting assets does not fix runtime buffer format mismatches caused by code changes.